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/init.h> 74 #include <linux/slab.h> 75 #include <linux/tty.h> 76 #include <linux/tty_driver.h> 77 #include <linux/tty_flip.h> 78 #include <linux/module.h> 79 #include <linux/spinlock.h> 80 #include <linux/ioctl.h> 81 #include <linux/serial.h> 82 #include <linux/circ_buf.h> 83 #include <linux/mutex.h> 84 #include <asm/uaccess.h> 85 #include <linux/usb.h> 86 #include <linux/usb/serial.h> 87 88 #include "ti_usb_3410_5052.h" 89 #include "ti_fw_3410.h" /* firmware image for 3410 */ 90 #include "ti_fw_5052.h" /* firmware image for 5052 */ 91 92 93 /* Defines */ 94 95 #define TI_DRIVER_VERSION "v0.9" 96 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>" 97 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver" 98 99 #define TI_FIRMWARE_BUF_SIZE 16284 100 101 #define TI_WRITE_BUF_SIZE 1024 102 103 #define TI_TRANSFER_TIMEOUT 2 104 105 #define TI_DEFAULT_LOW_LATENCY 0 106 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */ 107 108 /* supported setserial flags */ 109 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY) 110 111 /* read urb states */ 112 #define TI_READ_URB_RUNNING 0 113 #define TI_READ_URB_STOPPING 1 114 #define TI_READ_URB_STOPPED 2 115 116 #define TI_EXTRA_VID_PID_COUNT 5 117 118 119 /* Structures */ 120 121 struct ti_port { 122 int tp_is_open; 123 __u8 tp_msr; 124 __u8 tp_lsr; 125 __u8 tp_shadow_mcr; 126 __u8 tp_uart_mode; /* 232 or 485 modes */ 127 unsigned int tp_uart_base_addr; 128 int tp_flags; 129 int tp_closing_wait;/* in .01 secs */ 130 struct async_icount tp_icount; 131 wait_queue_head_t tp_msr_wait; /* wait for msr change */ 132 wait_queue_head_t tp_write_wait; 133 struct ti_device *tp_tdev; 134 struct usb_serial_port *tp_port; 135 spinlock_t tp_lock; 136 int tp_read_urb_state; 137 int tp_write_urb_in_use; 138 struct circ_buf *tp_write_buf; 139 }; 140 141 struct ti_device { 142 struct mutex td_open_close_lock; 143 int td_open_port_count; 144 struct usb_serial *td_serial; 145 int td_is_3410; 146 int td_urb_error; 147 }; 148 149 150 /* Function Declarations */ 151 152 static int ti_startup(struct usb_serial *serial); 153 static void ti_shutdown(struct usb_serial *serial); 154 static int ti_open(struct usb_serial_port *port, struct file *file); 155 static void ti_close(struct usb_serial_port *port, struct file *file); 156 static int ti_write(struct usb_serial_port *port, const unsigned char *data, 157 int count); 158 static int ti_write_room(struct usb_serial_port *port); 159 static int ti_chars_in_buffer(struct usb_serial_port *port); 160 static void ti_throttle(struct usb_serial_port *port); 161 static void ti_unthrottle(struct usb_serial_port *port); 162 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); 163 static void ti_set_termios(struct usb_serial_port *port, 164 struct ktermios *old_termios); 165 static int ti_tiocmget(struct usb_serial_port *port, struct file *file); 166 static int ti_tiocmset(struct usb_serial_port *port, struct file *file, 167 unsigned int set, unsigned int clear); 168 static void ti_break(struct usb_serial_port *port, int break_state); 169 static void ti_interrupt_callback(struct urb *urb); 170 static void ti_bulk_in_callback(struct urb *urb); 171 static void ti_bulk_out_callback(struct urb *urb); 172 173 static void ti_recv(struct device *dev, struct tty_struct *tty, 174 unsigned char *data, int length); 175 static void ti_send(struct ti_port *tport); 176 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr); 177 static int ti_get_lsr(struct ti_port *tport); 178 static int ti_get_serial_info(struct ti_port *tport, 179 struct serial_struct __user *ret_arg); 180 static int ti_set_serial_info(struct ti_port *tport, 181 struct serial_struct __user *new_arg); 182 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr); 183 184 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush); 185 186 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty); 187 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty); 188 189 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 190 __u16 moduleid, __u16 value, __u8 *data, int size); 191 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 192 __u16 moduleid, __u16 value, __u8 *data, int size); 193 194 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 195 __u8 mask, __u8 byte); 196 197 static int ti_download_firmware(struct ti_device *tdev, 198 unsigned char *firmware, unsigned int firmware_size); 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_interrupt_in = NUM_DONT_CARE, 268 .num_bulk_in = NUM_DONT_CARE, 269 .num_bulk_out = 1, 270 .num_ports = 1, 271 .attach = ti_startup, 272 .shutdown = ti_shutdown, 273 .open = ti_open, 274 .close = ti_close, 275 .write = ti_write, 276 .write_room = ti_write_room, 277 .chars_in_buffer = ti_chars_in_buffer, 278 .throttle = ti_throttle, 279 .unthrottle = ti_unthrottle, 280 .ioctl = ti_ioctl, 281 .set_termios = ti_set_termios, 282 .tiocmget = ti_tiocmget, 283 .tiocmset = ti_tiocmset, 284 .break_ctl = ti_break, 285 .read_int_callback = ti_interrupt_callback, 286 .read_bulk_callback = ti_bulk_in_callback, 287 .write_bulk_callback = ti_bulk_out_callback, 288 }; 289 290 static struct usb_serial_driver ti_2port_device = { 291 .driver = { 292 .owner = THIS_MODULE, 293 .name = "ti_usb_3410_5052_2", 294 }, 295 .description = "TI USB 5052 2 port adapter", 296 .usb_driver = &ti_usb_driver, 297 .id_table = ti_id_table_5052, 298 .num_interrupt_in = 1, 299 .num_bulk_in = 2, 300 .num_bulk_out = 2, 301 .num_ports = 2, 302 .attach = ti_startup, 303 .shutdown = ti_shutdown, 304 .open = ti_open, 305 .close = ti_close, 306 .write = ti_write, 307 .write_room = ti_write_room, 308 .chars_in_buffer = ti_chars_in_buffer, 309 .throttle = ti_throttle, 310 .unthrottle = ti_unthrottle, 311 .ioctl = ti_ioctl, 312 .set_termios = ti_set_termios, 313 .tiocmget = ti_tiocmget, 314 .tiocmset = ti_tiocmset, 315 .break_ctl = ti_break, 316 .read_int_callback = ti_interrupt_callback, 317 .read_bulk_callback = ti_bulk_in_callback, 318 .write_bulk_callback = ti_bulk_out_callback, 319 }; 320 321 322 /* Module */ 323 324 MODULE_AUTHOR(TI_DRIVER_AUTHOR); 325 MODULE_DESCRIPTION(TI_DRIVER_DESC); 326 MODULE_VERSION(TI_DRIVER_VERSION); 327 MODULE_LICENSE("GPL"); 328 329 module_param(debug, bool, S_IRUGO | S_IWUSR); 330 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes"); 331 332 module_param(low_latency, bool, S_IRUGO | S_IWUSR); 333 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off"); 334 335 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 336 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000"); 337 338 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO); 339 MODULE_PARM_DESC(vendor_3410, "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, "Product ids for 3410 based devices, 1-5 short integers"); 342 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO); 343 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers"); 344 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO); 345 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers"); 346 347 MODULE_DEVICE_TABLE(usb, ti_id_table_combined); 348 349 350 /* Functions */ 351 352 static int __init ti_init(void) 353 { 354 int i,j; 355 int ret; 356 357 /* insert extra vendor and product ids */ 358 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1; 359 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) { 360 ti_id_table_3410[j].idVendor = vendor_3410[i]; 361 ti_id_table_3410[j].idProduct = product_3410[i]; 362 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 363 } 364 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1; 365 for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) { 366 ti_id_table_5052[j].idVendor = vendor_5052[i]; 367 ti_id_table_5052[j].idProduct = product_5052[i]; 368 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 369 } 370 371 ret = usb_serial_register(&ti_1port_device); 372 if (ret) 373 goto failed_1port; 374 ret = usb_serial_register(&ti_2port_device); 375 if (ret) 376 goto failed_2port; 377 378 ret = usb_register(&ti_usb_driver); 379 if (ret) 380 goto failed_usb; 381 382 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION); 383 384 return 0; 385 386 failed_usb: 387 usb_serial_deregister(&ti_2port_device); 388 failed_2port: 389 usb_serial_deregister(&ti_1port_device); 390 failed_1port: 391 return ret; 392 } 393 394 395 static void __exit ti_exit(void) 396 { 397 usb_serial_deregister(&ti_1port_device); 398 usb_serial_deregister(&ti_2port_device); 399 usb_deregister(&ti_usb_driver); 400 } 401 402 403 module_init(ti_init); 404 module_exit(ti_exit); 405 406 407 static int ti_startup(struct usb_serial *serial) 408 { 409 struct ti_device *tdev; 410 struct ti_port *tport; 411 struct usb_device *dev = serial->dev; 412 int status; 413 int i; 414 415 416 dbg("%s - product 0x%4X, num configurations %d, configuration value %d", 417 __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct), 418 dev->descriptor.bNumConfigurations, 419 dev->actconfig->desc.bConfigurationValue); 420 421 /* create device structure */ 422 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL); 423 if (tdev == NULL) { 424 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 425 return -ENOMEM; 426 } 427 mutex_init(&tdev->td_open_close_lock); 428 tdev->td_serial = serial; 429 usb_set_serial_data(serial, tdev); 430 431 /* determine device type */ 432 if (usb_match_id(serial->interface, ti_id_table_3410)) 433 tdev->td_is_3410 = 1; 434 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052"); 435 436 /* if we have only 1 configuration, download firmware */ 437 if (dev->descriptor.bNumConfigurations == 1) { 438 439 if (tdev->td_is_3410) 440 status = ti_download_firmware(tdev, ti_fw_3410, 441 sizeof(ti_fw_3410)); 442 else 443 status = ti_download_firmware(tdev, ti_fw_5052, 444 sizeof(ti_fw_5052)); 445 if (status) 446 goto free_tdev; 447 448 /* 3410 must be reset, 5052 resets itself */ 449 if (tdev->td_is_3410) { 450 msleep_interruptible(100); 451 usb_reset_device(dev); 452 } 453 454 status = -ENODEV; 455 goto free_tdev; 456 } 457 458 /* the second configuration must be set (in sysfs by hotplug script) */ 459 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) { 460 status = -ENODEV; 461 goto free_tdev; 462 } 463 464 /* set up port structures */ 465 for (i = 0; i < serial->num_ports; ++i) { 466 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL); 467 if (tport == NULL) { 468 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 469 status = -ENOMEM; 470 goto free_tports; 471 } 472 spin_lock_init(&tport->tp_lock); 473 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR); 474 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0; 475 tport->tp_closing_wait = closing_wait; 476 init_waitqueue_head(&tport->tp_msr_wait); 477 init_waitqueue_head(&tport->tp_write_wait); 478 tport->tp_write_buf = ti_buf_alloc(); 479 if (tport->tp_write_buf == NULL) { 480 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 481 kfree(tport); 482 status = -ENOMEM; 483 goto free_tports; 484 } 485 tport->tp_port = serial->port[i]; 486 tport->tp_tdev = tdev; 487 usb_set_serial_port_data(serial->port[i], tport); 488 tport->tp_uart_mode = 0; /* default is RS232 */ 489 } 490 491 return 0; 492 493 free_tports: 494 for (--i; i>=0; --i) { 495 tport = usb_get_serial_port_data(serial->port[i]); 496 ti_buf_free(tport->tp_write_buf); 497 kfree(tport); 498 usb_set_serial_port_data(serial->port[i], NULL); 499 } 500 free_tdev: 501 kfree(tdev); 502 usb_set_serial_data(serial, NULL); 503 return status; 504 } 505 506 507 static void ti_shutdown(struct usb_serial *serial) 508 { 509 int i; 510 struct ti_device *tdev = usb_get_serial_data(serial); 511 struct ti_port *tport; 512 513 dbg("%s", __FUNCTION__); 514 515 for (i=0; i < serial->num_ports; ++i) { 516 tport = usb_get_serial_port_data(serial->port[i]); 517 if (tport) { 518 ti_buf_free(tport->tp_write_buf); 519 kfree(tport); 520 usb_set_serial_port_data(serial->port[i], NULL); 521 } 522 } 523 524 kfree(tdev); 525 usb_set_serial_data(serial, NULL); 526 } 527 528 529 static int ti_open(struct usb_serial_port *port, struct file *file) 530 { 531 struct ti_port *tport = usb_get_serial_port_data(port); 532 struct ti_device *tdev; 533 struct usb_device *dev; 534 struct urb *urb; 535 int port_number; 536 int status; 537 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 538 TI_PIPE_TIMEOUT_ENABLE | 539 (TI_TRANSFER_TIMEOUT << 2)); 540 541 dbg("%s - port %d", __FUNCTION__, port->number); 542 543 if (tport == NULL) 544 return -ENODEV; 545 546 dev = port->serial->dev; 547 tdev = tport->tp_tdev; 548 549 /* only one open on any port on a device at a time */ 550 if (mutex_lock_interruptible(&tdev->td_open_close_lock)) 551 return -ERESTARTSYS; 552 553 if (port->tty) 554 port->tty->low_latency = 555 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0; 556 557 port_number = port->number - port->serial->minor; 558 559 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount)); 560 561 tport->tp_msr = 0; 562 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR); 563 564 /* start interrupt urb the first time a port is opened on this device */ 565 if (tdev->td_open_port_count == 0) { 566 dbg("%s - start interrupt in urb", __FUNCTION__); 567 urb = tdev->td_serial->port[0]->interrupt_in_urb; 568 if (!urb) { 569 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__); 570 status = -EINVAL; 571 goto release_lock; 572 } 573 urb->complete = ti_interrupt_callback; 574 urb->context = tdev; 575 urb->dev = dev; 576 status = usb_submit_urb(urb, GFP_KERNEL); 577 if (status) { 578 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status); 579 goto release_lock; 580 } 581 } 582 583 ti_set_termios(port, port->tty->termios); 584 585 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__); 586 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 587 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 588 if (status) { 589 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status); 590 goto unlink_int_urb; 591 } 592 593 dbg("%s - sending TI_START_PORT", __FUNCTION__); 594 status = ti_command_out_sync(tdev, TI_START_PORT, 595 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 596 if (status) { 597 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status); 598 goto unlink_int_urb; 599 } 600 601 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__); 602 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 603 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0); 604 if (status) { 605 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status); 606 goto unlink_int_urb; 607 } 608 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 609 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0); 610 if (status) { 611 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status); 612 goto unlink_int_urb; 613 } 614 615 /* reset the data toggle on the bulk endpoints to work around bug in 616 * host controllers where things get out of sync some times */ 617 usb_clear_halt(dev, port->write_urb->pipe); 618 usb_clear_halt(dev, port->read_urb->pipe); 619 620 ti_set_termios(port, port->tty->termios); 621 622 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__); 623 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 624 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 625 if (status) { 626 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status); 627 goto unlink_int_urb; 628 } 629 630 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__); 631 status = ti_command_out_sync(tdev, TI_START_PORT, 632 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 633 if (status) { 634 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status); 635 goto unlink_int_urb; 636 } 637 638 /* start read urb */ 639 dbg("%s - start read urb", __FUNCTION__); 640 urb = port->read_urb; 641 if (!urb) { 642 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__); 643 status = -EINVAL; 644 goto unlink_int_urb; 645 } 646 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 647 urb->complete = ti_bulk_in_callback; 648 urb->context = tport; 649 urb->dev = dev; 650 status = usb_submit_urb(urb, GFP_KERNEL); 651 if (status) { 652 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status); 653 goto unlink_int_urb; 654 } 655 656 tport->tp_is_open = 1; 657 ++tdev->td_open_port_count; 658 659 goto release_lock; 660 661 unlink_int_urb: 662 if (tdev->td_open_port_count == 0) 663 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 664 release_lock: 665 mutex_unlock(&tdev->td_open_close_lock); 666 dbg("%s - exit %d", __FUNCTION__, status); 667 return status; 668 } 669 670 671 static void ti_close(struct usb_serial_port *port, struct file *file) 672 { 673 struct ti_device *tdev; 674 struct ti_port *tport; 675 int port_number; 676 int status; 677 int do_unlock; 678 679 dbg("%s - port %d", __FUNCTION__, port->number); 680 681 tdev = usb_get_serial_data(port->serial); 682 tport = usb_get_serial_port_data(port); 683 if (tdev == NULL || tport == NULL) 684 return; 685 686 tport->tp_is_open = 0; 687 688 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1); 689 690 usb_kill_urb(port->read_urb); 691 usb_kill_urb(port->write_urb); 692 tport->tp_write_urb_in_use = 0; 693 694 port_number = port->number - port->serial->minor; 695 696 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__); 697 status = ti_command_out_sync(tdev, TI_CLOSE_PORT, 698 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 699 if (status) 700 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status); 701 702 /* if mutex_lock is interrupted, continue anyway */ 703 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock); 704 --tport->tp_tdev->td_open_port_count; 705 if (tport->tp_tdev->td_open_port_count <= 0) { 706 /* last port is closed, shut down interrupt urb */ 707 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 708 tport->tp_tdev->td_open_port_count = 0; 709 } 710 if (do_unlock) 711 mutex_unlock(&tdev->td_open_close_lock); 712 713 dbg("%s - exit", __FUNCTION__); 714 } 715 716 717 static int ti_write(struct usb_serial_port *port, const unsigned char *data, 718 int count) 719 { 720 struct ti_port *tport = usb_get_serial_port_data(port); 721 unsigned long flags; 722 723 dbg("%s - port %d", __FUNCTION__, port->number); 724 725 if (count == 0) { 726 dbg("%s - write request of 0 bytes", __FUNCTION__); 727 return 0; 728 } 729 730 if (tport == NULL || !tport->tp_is_open) 731 return -ENODEV; 732 733 spin_lock_irqsave(&tport->tp_lock, flags); 734 count = ti_buf_put(tport->tp_write_buf, data, count); 735 spin_unlock_irqrestore(&tport->tp_lock, flags); 736 737 ti_send(tport); 738 739 return count; 740 } 741 742 743 static int ti_write_room(struct usb_serial_port *port) 744 { 745 struct ti_port *tport = usb_get_serial_port_data(port); 746 int room = 0; 747 unsigned long flags; 748 749 dbg("%s - port %d", __FUNCTION__, port->number); 750 751 if (tport == NULL) 752 return -ENODEV; 753 754 spin_lock_irqsave(&tport->tp_lock, flags); 755 room = ti_buf_space_avail(tport->tp_write_buf); 756 spin_unlock_irqrestore(&tport->tp_lock, flags); 757 758 dbg("%s - returns %d", __FUNCTION__, room); 759 return room; 760 } 761 762 763 static int ti_chars_in_buffer(struct usb_serial_port *port) 764 { 765 struct ti_port *tport = usb_get_serial_port_data(port); 766 int chars = 0; 767 unsigned long flags; 768 769 dbg("%s - port %d", __FUNCTION__, port->number); 770 771 if (tport == NULL) 772 return -ENODEV; 773 774 spin_lock_irqsave(&tport->tp_lock, flags); 775 chars = ti_buf_data_avail(tport->tp_write_buf); 776 spin_unlock_irqrestore(&tport->tp_lock, flags); 777 778 dbg("%s - returns %d", __FUNCTION__, chars); 779 return chars; 780 } 781 782 783 static void ti_throttle(struct usb_serial_port *port) 784 { 785 struct ti_port *tport = usb_get_serial_port_data(port); 786 struct tty_struct *tty; 787 788 dbg("%s - port %d", __FUNCTION__, port->number); 789 790 if (tport == NULL) 791 return; 792 793 tty = port->tty; 794 if (!tty) { 795 dbg("%s - no tty", __FUNCTION__); 796 return; 797 } 798 799 if (I_IXOFF(tty) || C_CRTSCTS(tty)) 800 ti_stop_read(tport, tty); 801 802 } 803 804 805 static void ti_unthrottle(struct usb_serial_port *port) 806 { 807 struct ti_port *tport = usb_get_serial_port_data(port); 808 struct tty_struct *tty; 809 int status; 810 811 dbg("%s - port %d", __FUNCTION__, port->number); 812 813 if (tport == NULL) 814 return; 815 816 tty = port->tty; 817 if (!tty) { 818 dbg("%s - no tty", __FUNCTION__); 819 return; 820 } 821 822 if (I_IXOFF(tty) || C_CRTSCTS(tty)) { 823 status = ti_restart_read(tport, tty); 824 if (status) 825 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status); 826 } 827 } 828 829 830 static int ti_ioctl(struct usb_serial_port *port, struct file *file, 831 unsigned int cmd, unsigned long arg) 832 { 833 struct ti_port *tport = usb_get_serial_port_data(port); 834 struct async_icount cnow; 835 struct async_icount cprev; 836 837 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd); 838 839 if (tport == NULL) 840 return -ENODEV; 841 842 switch (cmd) { 843 case TIOCGSERIAL: 844 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number); 845 return ti_get_serial_info(tport, (struct serial_struct __user *)arg); 846 break; 847 848 case TIOCSSERIAL: 849 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number); 850 return ti_set_serial_info(tport, (struct serial_struct __user *)arg); 851 break; 852 853 case TIOCMIWAIT: 854 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number); 855 cprev = tport->tp_icount; 856 while (1) { 857 interruptible_sleep_on(&tport->tp_msr_wait); 858 if (signal_pending(current)) 859 return -ERESTARTSYS; 860 cnow = tport->tp_icount; 861 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 862 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 863 return -EIO; /* no change => error */ 864 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 865 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 866 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 867 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { 868 return 0; 869 } 870 cprev = cnow; 871 } 872 break; 873 874 case TIOCGICOUNT: 875 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx); 876 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount))) 877 return -EFAULT; 878 return 0; 879 } 880 881 return -ENOIOCTLCMD; 882 } 883 884 885 static void ti_set_termios(struct usb_serial_port *port, 886 struct ktermios *old_termios) 887 { 888 struct ti_port *tport = usb_get_serial_port_data(port); 889 struct tty_struct *tty = port->tty; 890 struct ti_uart_config *config; 891 tcflag_t cflag,iflag; 892 int baud; 893 int status; 894 int port_number = port->number - port->serial->minor; 895 unsigned int mcr; 896 897 dbg("%s - port %d", __FUNCTION__, port->number); 898 899 cflag = tty->termios->c_cflag; 900 iflag = tty->termios->c_iflag; 901 902 dbg("%s - cflag %08x, iflag %08x", __FUNCTION__, cflag, iflag); 903 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag); 904 905 if (tport == NULL) 906 return; 907 908 config = kmalloc(sizeof(*config), GFP_KERNEL); 909 if (!config) { 910 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__); 911 return; 912 } 913 914 config->wFlags = 0; 915 916 /* these flags must be set */ 917 config->wFlags |= TI_UART_ENABLE_MS_INTS; 918 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA; 919 config->bUartMode = (__u8)(tport->tp_uart_mode); 920 921 switch (cflag & CSIZE) { 922 case CS5: 923 config->bDataBits = TI_UART_5_DATA_BITS; 924 break; 925 case CS6: 926 config->bDataBits = TI_UART_6_DATA_BITS; 927 break; 928 case CS7: 929 config->bDataBits = TI_UART_7_DATA_BITS; 930 break; 931 default: 932 case CS8: 933 config->bDataBits = TI_UART_8_DATA_BITS; 934 break; 935 } 936 937 /* CMSPAR isn't supported by this driver */ 938 tty->termios->c_cflag &= ~CMSPAR; 939 940 if (cflag & PARENB) { 941 if (cflag & PARODD) { 942 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 943 config->bParity = TI_UART_ODD_PARITY; 944 } else { 945 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 946 config->bParity = TI_UART_EVEN_PARITY; 947 } 948 } else { 949 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING; 950 config->bParity = TI_UART_NO_PARITY; 951 } 952 953 if (cflag & CSTOPB) 954 config->bStopBits = TI_UART_2_STOP_BITS; 955 else 956 config->bStopBits = TI_UART_1_STOP_BITS; 957 958 if (cflag & CRTSCTS) { 959 /* RTS flow control must be off to drop RTS for baud rate B0 */ 960 if ((cflag & CBAUD) != B0) 961 config->wFlags |= TI_UART_ENABLE_RTS_IN; 962 config->wFlags |= TI_UART_ENABLE_CTS_OUT; 963 } else { 964 tty->hw_stopped = 0; 965 ti_restart_read(tport, tty); 966 } 967 968 if (I_IXOFF(tty) || I_IXON(tty)) { 969 config->cXon = START_CHAR(tty); 970 config->cXoff = STOP_CHAR(tty); 971 972 if (I_IXOFF(tty)) 973 config->wFlags |= TI_UART_ENABLE_X_IN; 974 else 975 ti_restart_read(tport, tty); 976 977 if (I_IXON(tty)) 978 config->wFlags |= TI_UART_ENABLE_X_OUT; 979 } 980 981 baud = tty_get_baud_rate(tty); 982 if (!baud) 983 baud = 9600; 984 if (tport->tp_tdev->td_is_3410) 985 config->wBaudRate = (__u16)((923077 + baud/2) / baud); 986 else 987 config->wBaudRate = (__u16)((461538 + baud/2) / baud); 988 989 /* FIXME: Should calculate resulting baud here and report it back */ 990 if ((cflag & CBAUD) != B0) 991 tty_encode_baud_rate(tty, baud, baud); 992 993 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d", 994 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode); 995 996 cpu_to_be16s(&config->wBaudRate); 997 cpu_to_be16s(&config->wFlags); 998 999 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG, 1000 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config, 1001 sizeof(*config)); 1002 if (status) 1003 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status); 1004 1005 /* SET_CONFIG asserts RTS and DTR, reset them correctly */ 1006 mcr = tport->tp_shadow_mcr; 1007 /* if baud rate is B0, clear RTS and DTR */ 1008 if ((cflag & CBAUD) == B0) 1009 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS); 1010 status = ti_set_mcr(tport, mcr); 1011 if (status) 1012 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status); 1013 1014 kfree(config); 1015 } 1016 1017 1018 static int ti_tiocmget(struct usb_serial_port *port, struct file *file) 1019 { 1020 struct ti_port *tport = usb_get_serial_port_data(port); 1021 unsigned int result; 1022 unsigned int msr; 1023 unsigned int mcr; 1024 1025 dbg("%s - port %d", __FUNCTION__, port->number); 1026 1027 if (tport == NULL) 1028 return -ENODEV; 1029 1030 msr = tport->tp_msr; 1031 mcr = tport->tp_shadow_mcr; 1032 1033 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0) 1034 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0) 1035 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0) 1036 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0) 1037 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0) 1038 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0) 1039 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0); 1040 1041 dbg("%s - 0x%04X", __FUNCTION__, result); 1042 1043 return result; 1044 } 1045 1046 1047 static int ti_tiocmset(struct usb_serial_port *port, struct file *file, 1048 unsigned int set, unsigned int clear) 1049 { 1050 struct ti_port *tport = usb_get_serial_port_data(port); 1051 unsigned int mcr; 1052 1053 dbg("%s - port %d", __FUNCTION__, port->number); 1054 1055 if (tport == NULL) 1056 return -ENODEV; 1057 1058 mcr = tport->tp_shadow_mcr; 1059 1060 if (set & TIOCM_RTS) 1061 mcr |= TI_MCR_RTS; 1062 if (set & TIOCM_DTR) 1063 mcr |= TI_MCR_DTR; 1064 if (set & TIOCM_LOOP) 1065 mcr |= TI_MCR_LOOP; 1066 1067 if (clear & TIOCM_RTS) 1068 mcr &= ~TI_MCR_RTS; 1069 if (clear & TIOCM_DTR) 1070 mcr &= ~TI_MCR_DTR; 1071 if (clear & TIOCM_LOOP) 1072 mcr &= ~TI_MCR_LOOP; 1073 1074 return ti_set_mcr(tport, mcr); 1075 } 1076 1077 1078 static void ti_break(struct usb_serial_port *port, int break_state) 1079 { 1080 struct ti_port *tport = usb_get_serial_port_data(port); 1081 int status; 1082 1083 dbg("%s - state = %d", __FUNCTION__, break_state); 1084 1085 if (tport == NULL) 1086 return; 1087 1088 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0); 1089 1090 status = ti_write_byte(tport->tp_tdev, 1091 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR, 1092 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0); 1093 1094 if (status) 1095 dbg("%s - error setting break, %d", __FUNCTION__, status); 1096 } 1097 1098 1099 static void ti_interrupt_callback(struct urb *urb) 1100 { 1101 struct ti_device *tdev = (struct ti_device *)urb->context; 1102 struct usb_serial_port *port; 1103 struct usb_serial *serial = tdev->td_serial; 1104 struct ti_port *tport; 1105 struct device *dev = &urb->dev->dev; 1106 unsigned char *data = urb->transfer_buffer; 1107 int length = urb->actual_length; 1108 int port_number; 1109 int function; 1110 int status = urb->status; 1111 int retval; 1112 __u8 msr; 1113 1114 dbg("%s", __FUNCTION__); 1115 1116 switch (status) { 1117 case 0: 1118 break; 1119 case -ECONNRESET: 1120 case -ENOENT: 1121 case -ESHUTDOWN: 1122 dbg("%s - urb shutting down, %d", __FUNCTION__, status); 1123 tdev->td_urb_error = 1; 1124 return; 1125 default: 1126 dev_err(dev, "%s - nonzero urb status, %d\n", 1127 __FUNCTION__, status); 1128 tdev->td_urb_error = 1; 1129 goto exit; 1130 } 1131 1132 if (length != 2) { 1133 dbg("%s - bad packet size, %d", __FUNCTION__, length); 1134 goto exit; 1135 } 1136 1137 if (data[0] == TI_CODE_HARDWARE_ERROR) { 1138 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]); 1139 goto exit; 1140 } 1141 1142 port_number = TI_GET_PORT_FROM_CODE(data[0]); 1143 function = TI_GET_FUNC_FROM_CODE(data[0]); 1144 1145 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]); 1146 1147 if (port_number >= serial->num_ports) { 1148 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number); 1149 goto exit; 1150 } 1151 1152 port = serial->port[port_number]; 1153 1154 tport = usb_get_serial_port_data(port); 1155 if (!tport) 1156 goto exit; 1157 1158 switch (function) { 1159 case TI_CODE_DATA_ERROR: 1160 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]); 1161 break; 1162 1163 case TI_CODE_MODEM_STATUS: 1164 msr = data[1]; 1165 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr); 1166 ti_handle_new_msr(tport, msr); 1167 break; 1168 1169 default: 1170 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]); 1171 break; 1172 } 1173 1174 exit: 1175 retval = usb_submit_urb(urb, GFP_ATOMIC); 1176 if (retval) 1177 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", 1178 __FUNCTION__, retval); 1179 } 1180 1181 1182 static void ti_bulk_in_callback(struct urb *urb) 1183 { 1184 struct ti_port *tport = (struct ti_port *)urb->context; 1185 struct usb_serial_port *port = tport->tp_port; 1186 struct device *dev = &urb->dev->dev; 1187 int status = urb->status; 1188 int retval = 0; 1189 1190 dbg("%s", __FUNCTION__); 1191 1192 switch (status) { 1193 case 0: 1194 break; 1195 case -ECONNRESET: 1196 case -ENOENT: 1197 case -ESHUTDOWN: 1198 dbg("%s - urb shutting down, %d", __FUNCTION__, status); 1199 tport->tp_tdev->td_urb_error = 1; 1200 wake_up_interruptible(&tport->tp_write_wait); 1201 return; 1202 default: 1203 dev_err(dev, "%s - nonzero urb status, %d\n", 1204 __FUNCTION__, status ); 1205 tport->tp_tdev->td_urb_error = 1; 1206 wake_up_interruptible(&tport->tp_write_wait); 1207 } 1208 1209 if (status == -EPIPE) 1210 goto exit; 1211 1212 if (status) { 1213 dev_err(dev, "%s - stopping read!\n", __FUNCTION__); 1214 return; 1215 } 1216 1217 if (port->tty && urb->actual_length) { 1218 usb_serial_debug_data(debug, dev, __FUNCTION__, 1219 urb->actual_length, urb->transfer_buffer); 1220 1221 if (!tport->tp_is_open) 1222 dbg("%s - port closed, dropping data", __FUNCTION__); 1223 else 1224 ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer, 1225 urb->actual_length); 1226 1227 spin_lock(&tport->tp_lock); 1228 tport->tp_icount.rx += urb->actual_length; 1229 spin_unlock(&tport->tp_lock); 1230 } 1231 1232 exit: 1233 /* continue to read unless stopping */ 1234 spin_lock(&tport->tp_lock); 1235 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) { 1236 urb->dev = port->serial->dev; 1237 retval = usb_submit_urb(urb, GFP_ATOMIC); 1238 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) { 1239 tport->tp_read_urb_state = TI_READ_URB_STOPPED; 1240 } 1241 spin_unlock(&tport->tp_lock); 1242 if (retval) 1243 dev_err(dev, "%s - resubmit read urb failed, %d\n", 1244 __FUNCTION__, retval); 1245 } 1246 1247 1248 static void ti_bulk_out_callback(struct urb *urb) 1249 { 1250 struct ti_port *tport = (struct ti_port *)urb->context; 1251 struct usb_serial_port *port = tport->tp_port; 1252 struct device *dev = &urb->dev->dev; 1253 int status = urb->status; 1254 1255 dbg("%s - port %d", __FUNCTION__, port->number); 1256 1257 tport->tp_write_urb_in_use = 0; 1258 1259 switch (status) { 1260 case 0: 1261 break; 1262 case -ECONNRESET: 1263 case -ENOENT: 1264 case -ESHUTDOWN: 1265 dbg("%s - urb shutting down, %d", __FUNCTION__, status); 1266 tport->tp_tdev->td_urb_error = 1; 1267 wake_up_interruptible(&tport->tp_write_wait); 1268 return; 1269 default: 1270 dev_err(dev, "%s - nonzero urb status, %d\n", 1271 __FUNCTION__, status); 1272 tport->tp_tdev->td_urb_error = 1; 1273 wake_up_interruptible(&tport->tp_write_wait); 1274 } 1275 1276 /* send any buffered data */ 1277 ti_send(tport); 1278 } 1279 1280 1281 static void ti_recv(struct device *dev, struct tty_struct *tty, 1282 unsigned char *data, int length) 1283 { 1284 int cnt; 1285 1286 do { 1287 cnt = tty_buffer_request_room(tty, length); 1288 if (cnt < length) { 1289 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt); 1290 if(cnt == 0) 1291 break; 1292 } 1293 tty_insert_flip_string(tty, data, cnt); 1294 tty_flip_buffer_push(tty); 1295 data += cnt; 1296 length -= cnt; 1297 } while (length > 0); 1298 1299 } 1300 1301 1302 static void ti_send(struct ti_port *tport) 1303 { 1304 int count, result; 1305 struct usb_serial_port *port = tport->tp_port; 1306 struct tty_struct *tty = port->tty; 1307 unsigned long flags; 1308 1309 1310 dbg("%s - port %d", __FUNCTION__, port->number); 1311 1312 spin_lock_irqsave(&tport->tp_lock, flags); 1313 1314 if (tport->tp_write_urb_in_use) { 1315 spin_unlock_irqrestore(&tport->tp_lock, flags); 1316 return; 1317 } 1318 1319 count = ti_buf_get(tport->tp_write_buf, 1320 port->write_urb->transfer_buffer, 1321 port->bulk_out_size); 1322 1323 if (count == 0) { 1324 spin_unlock_irqrestore(&tport->tp_lock, flags); 1325 return; 1326 } 1327 1328 tport->tp_write_urb_in_use = 1; 1329 1330 spin_unlock_irqrestore(&tport->tp_lock, flags); 1331 1332 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer); 1333 1334 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 1335 usb_sndbulkpipe(port->serial->dev, 1336 port->bulk_out_endpointAddress), 1337 port->write_urb->transfer_buffer, count, 1338 ti_bulk_out_callback, tport); 1339 1340 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 1341 if (result) { 1342 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result); 1343 tport->tp_write_urb_in_use = 0; 1344 /* TODO: reschedule ti_send */ 1345 } else { 1346 spin_lock_irqsave(&tport->tp_lock, flags); 1347 tport->tp_icount.tx += count; 1348 spin_unlock_irqrestore(&tport->tp_lock, flags); 1349 } 1350 1351 /* more room in the buffer for new writes, wakeup */ 1352 if (tty) 1353 tty_wakeup(tty); 1354 wake_up_interruptible(&tport->tp_write_wait); 1355 } 1356 1357 1358 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr) 1359 { 1360 int status; 1361 1362 status = ti_write_byte(tport->tp_tdev, 1363 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR, 1364 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr); 1365 1366 if (!status) 1367 tport->tp_shadow_mcr = mcr; 1368 1369 return status; 1370 } 1371 1372 1373 static int ti_get_lsr(struct ti_port *tport) 1374 { 1375 int size,status; 1376 struct ti_device *tdev = tport->tp_tdev; 1377 struct usb_serial_port *port = tport->tp_port; 1378 int port_number = port->number - port->serial->minor; 1379 struct ti_port_status *data; 1380 1381 dbg("%s - port %d", __FUNCTION__, port->number); 1382 1383 size = sizeof(struct ti_port_status); 1384 data = kmalloc(size, GFP_KERNEL); 1385 if (!data) { 1386 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__); 1387 return -ENOMEM; 1388 } 1389 1390 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS, 1391 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size); 1392 if (status) { 1393 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status); 1394 goto free_data; 1395 } 1396 1397 dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR); 1398 1399 tport->tp_lsr = data->bLSR; 1400 1401 free_data: 1402 kfree(data); 1403 return status; 1404 } 1405 1406 1407 static int ti_get_serial_info(struct ti_port *tport, 1408 struct serial_struct __user *ret_arg) 1409 { 1410 struct usb_serial_port *port = tport->tp_port; 1411 struct serial_struct ret_serial; 1412 1413 if (!ret_arg) 1414 return -EFAULT; 1415 1416 memset(&ret_serial, 0, sizeof(ret_serial)); 1417 1418 ret_serial.type = PORT_16550A; 1419 ret_serial.line = port->serial->minor; 1420 ret_serial.port = port->number - port->serial->minor; 1421 ret_serial.flags = tport->tp_flags; 1422 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE; 1423 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800; 1424 ret_serial.closing_wait = tport->tp_closing_wait; 1425 1426 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg))) 1427 return -EFAULT; 1428 1429 return 0; 1430 } 1431 1432 1433 static int ti_set_serial_info(struct ti_port *tport, 1434 struct serial_struct __user *new_arg) 1435 { 1436 struct usb_serial_port *port = tport->tp_port; 1437 struct serial_struct new_serial; 1438 1439 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial))) 1440 return -EFAULT; 1441 1442 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS; 1443 if (port->tty) 1444 port->tty->low_latency = 1445 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1446 tport->tp_closing_wait = new_serial.closing_wait; 1447 1448 return 0; 1449 } 1450 1451 1452 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr) 1453 { 1454 struct async_icount *icount; 1455 struct tty_struct *tty; 1456 unsigned long flags; 1457 1458 dbg("%s - msr 0x%02X", __FUNCTION__, msr); 1459 1460 if (msr & TI_MSR_DELTA_MASK) { 1461 spin_lock_irqsave(&tport->tp_lock, flags); 1462 icount = &tport->tp_icount; 1463 if (msr & TI_MSR_DELTA_CTS) 1464 icount->cts++; 1465 if (msr & TI_MSR_DELTA_DSR) 1466 icount->dsr++; 1467 if (msr & TI_MSR_DELTA_CD) 1468 icount->dcd++; 1469 if (msr & TI_MSR_DELTA_RI) 1470 icount->rng++; 1471 wake_up_interruptible(&tport->tp_msr_wait); 1472 spin_unlock_irqrestore(&tport->tp_lock, flags); 1473 } 1474 1475 tport->tp_msr = msr & TI_MSR_MASK; 1476 1477 /* handle CTS flow control */ 1478 tty = tport->tp_port->tty; 1479 if (tty && C_CRTSCTS(tty)) { 1480 if (msr & TI_MSR_CTS) { 1481 tty->hw_stopped = 0; 1482 tty_wakeup(tty); 1483 } else { 1484 tty->hw_stopped = 1; 1485 } 1486 } 1487 } 1488 1489 1490 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush) 1491 { 1492 struct ti_device *tdev = tport->tp_tdev; 1493 struct usb_serial_port *port = tport->tp_port; 1494 wait_queue_t wait; 1495 1496 dbg("%s - port %d", __FUNCTION__, port->number); 1497 1498 spin_lock_irq(&tport->tp_lock); 1499 1500 /* wait for data to drain from the buffer */ 1501 tdev->td_urb_error = 0; 1502 init_waitqueue_entry(&wait, current); 1503 add_wait_queue(&tport->tp_write_wait, &wait); 1504 for (;;) { 1505 set_current_state(TASK_INTERRUPTIBLE); 1506 if (ti_buf_data_avail(tport->tp_write_buf) == 0 1507 || timeout == 0 || signal_pending(current) 1508 || tdev->td_urb_error 1509 || port->serial->disconnected) /* disconnect */ 1510 break; 1511 spin_unlock_irq(&tport->tp_lock); 1512 timeout = schedule_timeout(timeout); 1513 spin_lock_irq(&tport->tp_lock); 1514 } 1515 set_current_state(TASK_RUNNING); 1516 remove_wait_queue(&tport->tp_write_wait, &wait); 1517 1518 /* flush any remaining data in the buffer */ 1519 if (flush) 1520 ti_buf_clear(tport->tp_write_buf); 1521 1522 spin_unlock_irq(&tport->tp_lock); 1523 1524 mutex_lock(&port->serial->disc_mutex); 1525 /* wait for data to drain from the device */ 1526 /* wait for empty tx register, plus 20 ms */ 1527 timeout += jiffies; 1528 tport->tp_lsr &= ~TI_LSR_TX_EMPTY; 1529 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 1530 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error 1531 && !port->serial->disconnected) { 1532 if (ti_get_lsr(tport)) 1533 break; 1534 mutex_unlock(&port->serial->disc_mutex); 1535 msleep_interruptible(20); 1536 mutex_lock(&port->serial->disc_mutex); 1537 } 1538 mutex_unlock(&port->serial->disc_mutex); 1539 } 1540 1541 1542 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty) 1543 { 1544 unsigned long flags; 1545 1546 spin_lock_irqsave(&tport->tp_lock, flags); 1547 1548 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1549 tport->tp_read_urb_state = TI_READ_URB_STOPPING; 1550 1551 spin_unlock_irqrestore(&tport->tp_lock, flags); 1552 } 1553 1554 1555 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty) 1556 { 1557 struct urb *urb; 1558 int status = 0; 1559 unsigned long flags; 1560 1561 spin_lock_irqsave(&tport->tp_lock, flags); 1562 1563 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) { 1564 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1565 urb = tport->tp_port->read_urb; 1566 spin_unlock_irqrestore(&tport->tp_lock, flags); 1567 urb->complete = ti_bulk_in_callback; 1568 urb->context = tport; 1569 urb->dev = tport->tp_port->serial->dev; 1570 status = usb_submit_urb(urb, GFP_KERNEL); 1571 } else { 1572 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1573 spin_unlock_irqrestore(&tport->tp_lock, flags); 1574 } 1575 1576 return status; 1577 } 1578 1579 1580 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 1581 __u16 moduleid, __u16 value, __u8 *data, int size) 1582 { 1583 int status; 1584 1585 status = usb_control_msg(tdev->td_serial->dev, 1586 usb_sndctrlpipe(tdev->td_serial->dev, 0), command, 1587 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 1588 value, moduleid, data, size, 1000); 1589 1590 if (status == size) 1591 status = 0; 1592 1593 if (status > 0) 1594 status = -ECOMM; 1595 1596 return status; 1597 } 1598 1599 1600 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 1601 __u16 moduleid, __u16 value, __u8 *data, int size) 1602 { 1603 int status; 1604 1605 status = usb_control_msg(tdev->td_serial->dev, 1606 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command, 1607 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 1608 value, moduleid, data, size, 1000); 1609 1610 if (status == size) 1611 status = 0; 1612 1613 if (status > 0) 1614 status = -ECOMM; 1615 1616 return status; 1617 } 1618 1619 1620 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 1621 __u8 mask, __u8 byte) 1622 { 1623 int status; 1624 unsigned int size; 1625 struct ti_write_data_bytes *data; 1626 struct device *dev = &tdev->td_serial->dev->dev; 1627 1628 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte); 1629 1630 size = sizeof(struct ti_write_data_bytes) + 2; 1631 data = kmalloc(size, GFP_KERNEL); 1632 if (!data) { 1633 dev_err(dev, "%s - out of memory\n", __FUNCTION__); 1634 return -ENOMEM; 1635 } 1636 1637 data->bAddrType = TI_RW_DATA_ADDR_XDATA; 1638 data->bDataType = TI_RW_DATA_BYTE; 1639 data->bDataCounter = 1; 1640 data->wBaseAddrHi = cpu_to_be16(addr>>16); 1641 data->wBaseAddrLo = cpu_to_be16(addr); 1642 data->bData[0] = mask; 1643 data->bData[1] = byte; 1644 1645 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0, 1646 (__u8 *)data, size); 1647 1648 if (status < 0) 1649 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status); 1650 1651 kfree(data); 1652 1653 return status; 1654 } 1655 1656 1657 static int ti_download_firmware(struct ti_device *tdev, 1658 unsigned char *firmware, unsigned int firmware_size) 1659 { 1660 int status = 0; 1661 int buffer_size; 1662 int pos; 1663 int len; 1664 int done; 1665 __u8 cs = 0; 1666 __u8 *buffer; 1667 struct usb_device *dev = tdev->td_serial->dev; 1668 struct ti_firmware_header *header; 1669 unsigned int pipe = usb_sndbulkpipe(dev, 1670 tdev->td_serial->port[0]->bulk_out_endpointAddress); 1671 1672 1673 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header); 1674 buffer = kmalloc(buffer_size, GFP_KERNEL); 1675 if (!buffer) { 1676 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 1677 return -ENOMEM; 1678 } 1679 1680 memcpy(buffer, firmware, firmware_size); 1681 memset(buffer+firmware_size, 0xff, buffer_size-firmware_size); 1682 1683 for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++) 1684 cs = (__u8)(cs + buffer[pos]); 1685 1686 header = (struct ti_firmware_header *)buffer; 1687 header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header))); 1688 header->bCheckSum = cs; 1689 1690 dbg("%s - downloading firmware", __FUNCTION__); 1691 for (pos = 0; pos < buffer_size; pos += done) { 1692 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE); 1693 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000); 1694 if (status) 1695 break; 1696 } 1697 1698 kfree(buffer); 1699 1700 if (status) { 1701 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status); 1702 return status; 1703 } 1704 1705 dbg("%s - download successful", __FUNCTION__); 1706 1707 return 0; 1708 } 1709 1710 1711 /* Circular Buffer Functions */ 1712 1713 /* 1714 * ti_buf_alloc 1715 * 1716 * Allocate a circular buffer and all associated memory. 1717 */ 1718 1719 static struct circ_buf *ti_buf_alloc(void) 1720 { 1721 struct circ_buf *cb; 1722 1723 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL); 1724 if (cb == NULL) 1725 return NULL; 1726 1727 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL); 1728 if (cb->buf == NULL) { 1729 kfree(cb); 1730 return NULL; 1731 } 1732 1733 ti_buf_clear(cb); 1734 1735 return cb; 1736 } 1737 1738 1739 /* 1740 * ti_buf_free 1741 * 1742 * Free the buffer and all associated memory. 1743 */ 1744 1745 static void ti_buf_free(struct circ_buf *cb) 1746 { 1747 kfree(cb->buf); 1748 kfree(cb); 1749 } 1750 1751 1752 /* 1753 * ti_buf_clear 1754 * 1755 * Clear out all data in the circular buffer. 1756 */ 1757 1758 static void ti_buf_clear(struct circ_buf *cb) 1759 { 1760 cb->head = cb->tail = 0; 1761 } 1762 1763 1764 /* 1765 * ti_buf_data_avail 1766 * 1767 * Return the number of bytes of data available in the circular 1768 * buffer. 1769 */ 1770 1771 static int ti_buf_data_avail(struct circ_buf *cb) 1772 { 1773 return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE); 1774 } 1775 1776 1777 /* 1778 * ti_buf_space_avail 1779 * 1780 * Return the number of bytes of space available in the circular 1781 * buffer. 1782 */ 1783 1784 static int ti_buf_space_avail(struct circ_buf *cb) 1785 { 1786 return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE); 1787 } 1788 1789 1790 /* 1791 * ti_buf_put 1792 * 1793 * Copy data data from a user buffer and put it into the circular buffer. 1794 * Restrict to the amount of space available. 1795 * 1796 * Return the number of bytes copied. 1797 */ 1798 1799 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count) 1800 { 1801 int c, ret = 0; 1802 1803 while (1) { 1804 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1805 if (count < c) 1806 c = count; 1807 if (c <= 0) 1808 break; 1809 memcpy(cb->buf + cb->head, buf, c); 1810 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1); 1811 buf += c; 1812 count -= c; 1813 ret += c; 1814 } 1815 1816 return ret; 1817 } 1818 1819 1820 /* 1821 * ti_buf_get 1822 * 1823 * Get data from the circular buffer and copy to the given buffer. 1824 * Restrict to the amount of data available. 1825 * 1826 * Return the number of bytes copied. 1827 */ 1828 1829 static int ti_buf_get(struct circ_buf *cb, char *buf, int count) 1830 { 1831 int c, ret = 0; 1832 1833 while (1) { 1834 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1835 if (count < c) 1836 c = count; 1837 if (c <= 0) 1838 break; 1839 memcpy(buf, cb->buf + cb->tail, c); 1840 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1); 1841 buf += c; 1842 count -= c; 1843 ret += c; 1844 } 1845 1846 return ret; 1847 } 1848