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/config.h> 72 #include <linux/kernel.h> 73 #include <linux/errno.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 <asm/uaccess.h> 85 #include <asm/semaphore.h> 86 #include <linux/usb.h> 87 88 #include "usb-serial.h" 89 #include "ti_usb_3410_5052.h" 90 #include "ti_fw_3410.h" /* firmware image for 3410 */ 91 #include "ti_fw_5052.h" /* firmware image for 5052 */ 92 93 94 /* Defines */ 95 96 #define TI_DRIVER_VERSION "v0.9" 97 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>" 98 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver" 99 100 #define TI_FIRMWARE_BUF_SIZE 16284 101 102 #define TI_WRITE_BUF_SIZE 1024 103 104 #define TI_TRANSFER_TIMEOUT 2 105 106 #define TI_DEFAULT_LOW_LATENCY 0 107 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */ 108 109 /* supported setserial flags */ 110 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY) 111 112 /* read urb states */ 113 #define TI_READ_URB_RUNNING 0 114 #define TI_READ_URB_STOPPING 1 115 #define TI_READ_URB_STOPPED 2 116 117 #define TI_EXTRA_VID_PID_COUNT 5 118 119 120 /* Structures */ 121 122 struct ti_port { 123 int tp_is_open; 124 __u8 tp_msr; 125 __u8 tp_lsr; 126 __u8 tp_shadow_mcr; 127 __u8 tp_uart_mode; /* 232 or 485 modes */ 128 unsigned int tp_uart_base_addr; 129 int tp_flags; 130 int tp_closing_wait;/* in .01 secs */ 131 struct async_icount tp_icount; 132 wait_queue_head_t tp_msr_wait; /* wait for msr change */ 133 wait_queue_head_t tp_write_wait; 134 struct ti_device *tp_tdev; 135 struct usb_serial_port *tp_port; 136 spinlock_t tp_lock; 137 int tp_read_urb_state; 138 int tp_write_urb_in_use; 139 struct circ_buf *tp_write_buf; 140 }; 141 142 struct ti_device { 143 struct semaphore td_open_close_sem; 144 int td_open_port_count; 145 struct usb_serial *td_serial; 146 int td_is_3410; 147 int td_urb_error; 148 }; 149 150 151 /* Function Declarations */ 152 153 static int ti_startup(struct usb_serial *serial); 154 static void ti_shutdown(struct usb_serial *serial); 155 static int ti_open(struct usb_serial_port *port, struct file *file); 156 static void ti_close(struct usb_serial_port *port, struct file *file); 157 static int ti_write(struct usb_serial_port *port, const unsigned char *data, 158 int count); 159 static int ti_write_room(struct usb_serial_port *port); 160 static int ti_chars_in_buffer(struct usb_serial_port *port); 161 static void ti_throttle(struct usb_serial_port *port); 162 static void ti_unthrottle(struct usb_serial_port *port); 163 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); 164 static void ti_set_termios(struct usb_serial_port *port, 165 struct termios *old_termios); 166 static int ti_tiocmget(struct usb_serial_port *port, struct file *file); 167 static int ti_tiocmset(struct usb_serial_port *port, struct file *file, 168 unsigned int set, unsigned int clear); 169 static void ti_break(struct usb_serial_port *port, int break_state); 170 static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs); 171 static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs); 172 static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs); 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 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, 199 unsigned char *firmware, unsigned int firmware_size); 200 201 /* circular buffer */ 202 static struct circ_buf *ti_buf_alloc(void); 203 static void ti_buf_free(struct circ_buf *cb); 204 static void ti_buf_clear(struct circ_buf *cb); 205 static int ti_buf_data_avail(struct circ_buf *cb); 206 static int ti_buf_space_avail(struct circ_buf *cb); 207 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count); 208 static int ti_buf_get(struct circ_buf *cb, char *buf, int count); 209 210 211 /* Data */ 212 213 /* module parameters */ 214 static int debug; 215 static int low_latency = TI_DEFAULT_LOW_LATENCY; 216 static int closing_wait = TI_DEFAULT_CLOSING_WAIT; 217 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT]; 218 static int vendor_3410_count; 219 static ushort product_3410[TI_EXTRA_VID_PID_COUNT]; 220 static int product_3410_count; 221 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT]; 222 static int vendor_5052_count; 223 static ushort product_5052[TI_EXTRA_VID_PID_COUNT]; 224 static int product_5052_count; 225 226 /* supported devices */ 227 /* the array dimension is the number of default entries plus */ 228 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */ 229 /* null entry */ 230 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = { 231 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_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_5052_BOOT_PRODUCT_ID) }, 244 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 245 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 246 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 247 { } 248 }; 249 250 static struct usb_driver ti_usb_driver = { 251 .owner = THIS_MODULE, 252 .name = "ti_usb_3410_5052", 253 .probe = usb_serial_probe, 254 .disconnect = usb_serial_disconnect, 255 .id_table = ti_id_table_combined, 256 }; 257 258 static struct usb_serial_driver ti_1port_device = { 259 .driver = { 260 .owner = THIS_MODULE, 261 .name = "ti_usb_3410_5052_1", 262 }, 263 .description = "TI USB 3410 1 port adapter", 264 .id_table = ti_id_table_3410, 265 .num_interrupt_in = 1, 266 .num_bulk_in = 1, 267 .num_bulk_out = 1, 268 .num_ports = 1, 269 .attach = ti_startup, 270 .shutdown = ti_shutdown, 271 .open = ti_open, 272 .close = ti_close, 273 .write = ti_write, 274 .write_room = ti_write_room, 275 .chars_in_buffer = ti_chars_in_buffer, 276 .throttle = ti_throttle, 277 .unthrottle = ti_unthrottle, 278 .ioctl = ti_ioctl, 279 .set_termios = ti_set_termios, 280 .tiocmget = ti_tiocmget, 281 .tiocmset = ti_tiocmset, 282 .break_ctl = ti_break, 283 .read_int_callback = ti_interrupt_callback, 284 .read_bulk_callback = ti_bulk_in_callback, 285 .write_bulk_callback = ti_bulk_out_callback, 286 }; 287 288 static struct usb_serial_driver ti_2port_device = { 289 .driver = { 290 .owner = THIS_MODULE, 291 .name = "ti_usb_3410_5052_2", 292 }, 293 .description = "TI USB 5052 2 port adapter", 294 .id_table = ti_id_table_5052, 295 .num_interrupt_in = 1, 296 .num_bulk_in = 2, 297 .num_bulk_out = 2, 298 .num_ports = 2, 299 .attach = ti_startup, 300 .shutdown = ti_shutdown, 301 .open = ti_open, 302 .close = ti_close, 303 .write = ti_write, 304 .write_room = ti_write_room, 305 .chars_in_buffer = ti_chars_in_buffer, 306 .throttle = ti_throttle, 307 .unthrottle = ti_unthrottle, 308 .ioctl = ti_ioctl, 309 .set_termios = ti_set_termios, 310 .tiocmget = ti_tiocmget, 311 .tiocmset = ti_tiocmset, 312 .break_ctl = ti_break, 313 .read_int_callback = ti_interrupt_callback, 314 .read_bulk_callback = ti_bulk_in_callback, 315 .write_bulk_callback = ti_bulk_out_callback, 316 }; 317 318 319 /* Module */ 320 321 MODULE_AUTHOR(TI_DRIVER_AUTHOR); 322 MODULE_DESCRIPTION(TI_DRIVER_DESC); 323 MODULE_VERSION(TI_DRIVER_VERSION); 324 MODULE_LICENSE("GPL"); 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, "TTY low_latency flag, 0=off, 1=on, default is off"); 331 332 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 333 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000"); 334 335 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO); 336 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers"); 337 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO); 338 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers"); 339 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO); 340 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers"); 341 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO); 342 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers"); 343 344 MODULE_DEVICE_TABLE(usb, ti_id_table_combined); 345 346 347 /* Functions */ 348 349 static int __init ti_init(void) 350 { 351 int i,j; 352 int ret; 353 354 355 /* insert extra vendor and product ids */ 356 j = sizeof(ti_id_table_3410)/sizeof(struct usb_device_id) 357 - TI_EXTRA_VID_PID_COUNT - 1; 358 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) { 359 ti_id_table_3410[j].idVendor = vendor_3410[i]; 360 ti_id_table_3410[j].idProduct = product_3410[i]; 361 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 362 } 363 j = sizeof(ti_id_table_5052)/sizeof(struct usb_device_id) 364 - 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 = kmalloc(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 memset(tdev, 0, sizeof(struct ti_device)); 428 sema_init(&tdev->td_open_close_sem, 1); 429 tdev->td_serial = serial; 430 usb_set_serial_data(serial, tdev); 431 432 /* determine device type */ 433 if (usb_match_id(serial->interface, ti_id_table_3410)) 434 tdev->td_is_3410 = 1; 435 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052"); 436 437 /* if we have only 1 configuration, download firmware */ 438 if (dev->descriptor.bNumConfigurations == 1) { 439 440 if (tdev->td_is_3410) 441 status = ti_download_firmware(tdev, ti_fw_3410, 442 sizeof(ti_fw_3410)); 443 else 444 status = ti_download_firmware(tdev, ti_fw_5052, 445 sizeof(ti_fw_5052)); 446 if (status) 447 goto free_tdev; 448 449 /* 3410 must be reset, 5052 resets itself */ 450 if (tdev->td_is_3410) { 451 msleep_interruptible(100); 452 usb_reset_device(dev); 453 } 454 455 status = -ENODEV; 456 goto free_tdev; 457 } 458 459 /* the second configuration must be set (in sysfs by hotplug script) */ 460 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) { 461 status = -ENODEV; 462 goto free_tdev; 463 } 464 465 /* set up port structures */ 466 for (i = 0; i < serial->num_ports; ++i) { 467 tport = kmalloc(sizeof(struct ti_port), GFP_KERNEL); 468 if (tport == NULL) { 469 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 470 status = -ENOMEM; 471 goto free_tports; 472 } 473 memset(tport, 0, sizeof(struct ti_port)); 474 spin_lock_init(&tport->tp_lock); 475 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR); 476 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0; 477 tport->tp_closing_wait = closing_wait; 478 init_waitqueue_head(&tport->tp_msr_wait); 479 init_waitqueue_head(&tport->tp_write_wait); 480 tport->tp_write_buf = ti_buf_alloc(); 481 if (tport->tp_write_buf == NULL) { 482 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 483 kfree(tport); 484 status = -ENOMEM; 485 goto free_tports; 486 } 487 tport->tp_port = serial->port[i]; 488 tport->tp_tdev = tdev; 489 usb_set_serial_port_data(serial->port[i], tport); 490 tport->tp_uart_mode = 0; /* default is RS232 */ 491 } 492 493 return 0; 494 495 free_tports: 496 for (--i; i>=0; --i) { 497 tport = usb_get_serial_port_data(serial->port[i]); 498 ti_buf_free(tport->tp_write_buf); 499 kfree(tport); 500 usb_set_serial_port_data(serial->port[i], NULL); 501 } 502 free_tdev: 503 kfree(tdev); 504 usb_set_serial_data(serial, NULL); 505 return status; 506 } 507 508 509 static void ti_shutdown(struct usb_serial *serial) 510 { 511 int i; 512 struct ti_device *tdev = usb_get_serial_data(serial); 513 struct ti_port *tport; 514 515 dbg("%s", __FUNCTION__); 516 517 for (i=0; i < serial->num_ports; ++i) { 518 tport = usb_get_serial_port_data(serial->port[i]); 519 if (tport) { 520 ti_buf_free(tport->tp_write_buf); 521 kfree(tport); 522 usb_set_serial_port_data(serial->port[i], NULL); 523 } 524 } 525 526 kfree(tdev); 527 usb_set_serial_data(serial, NULL); 528 } 529 530 531 static int ti_open(struct usb_serial_port *port, struct file *file) 532 { 533 struct ti_port *tport = usb_get_serial_port_data(port); 534 struct ti_device *tdev; 535 struct usb_device *dev; 536 struct urb *urb; 537 int port_number; 538 int status; 539 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 540 TI_PIPE_TIMEOUT_ENABLE | 541 (TI_TRANSFER_TIMEOUT << 2)); 542 543 dbg("%s - port %d", __FUNCTION__, port->number); 544 545 if (tport == NULL) 546 return -ENODEV; 547 548 dev = port->serial->dev; 549 tdev = tport->tp_tdev; 550 551 /* only one open on any port on a device at a time */ 552 if (down_interruptible(&tdev->td_open_close_sem)) 553 return -ERESTARTSYS; 554 555 if (port->tty) 556 port->tty->low_latency = 557 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0; 558 559 port_number = port->number - port->serial->minor; 560 561 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount)); 562 563 tport->tp_msr = 0; 564 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR); 565 566 /* start interrupt urb the first time a port is opened on this device */ 567 if (tdev->td_open_port_count == 0) { 568 dbg("%s - start interrupt in urb", __FUNCTION__); 569 urb = tdev->td_serial->port[0]->interrupt_in_urb; 570 if (!urb) { 571 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__); 572 status = -EINVAL; 573 goto up_sem; 574 } 575 urb->complete = ti_interrupt_callback; 576 urb->context = tdev; 577 urb->dev = dev; 578 status = usb_submit_urb(urb, GFP_KERNEL); 579 if (status) { 580 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status); 581 goto up_sem; 582 } 583 } 584 585 ti_set_termios(port, NULL); 586 587 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__); 588 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 589 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 590 if (status) { 591 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status); 592 goto unlink_int_urb; 593 } 594 595 dbg("%s - sending TI_START_PORT", __FUNCTION__); 596 status = ti_command_out_sync(tdev, TI_START_PORT, 597 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 598 if (status) { 599 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status); 600 goto unlink_int_urb; 601 } 602 603 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__); 604 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 605 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0); 606 if (status) { 607 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status); 608 goto unlink_int_urb; 609 } 610 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 611 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0); 612 if (status) { 613 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status); 614 goto unlink_int_urb; 615 } 616 617 /* reset the data toggle on the bulk endpoints to work around bug in 618 * host controllers where things get out of sync some times */ 619 usb_clear_halt(dev, port->write_urb->pipe); 620 usb_clear_halt(dev, port->read_urb->pipe); 621 622 ti_set_termios(port, NULL); 623 624 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__); 625 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 626 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 627 if (status) { 628 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status); 629 goto unlink_int_urb; 630 } 631 632 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__); 633 status = ti_command_out_sync(tdev, TI_START_PORT, 634 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 635 if (status) { 636 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status); 637 goto unlink_int_urb; 638 } 639 640 /* start read urb */ 641 dbg("%s - start read urb", __FUNCTION__); 642 urb = port->read_urb; 643 if (!urb) { 644 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__); 645 status = -EINVAL; 646 goto unlink_int_urb; 647 } 648 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 649 urb->complete = ti_bulk_in_callback; 650 urb->context = tport; 651 urb->dev = dev; 652 status = usb_submit_urb(urb, GFP_KERNEL); 653 if (status) { 654 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status); 655 goto unlink_int_urb; 656 } 657 658 tport->tp_is_open = 1; 659 ++tdev->td_open_port_count; 660 661 goto up_sem; 662 663 unlink_int_urb: 664 if (tdev->td_open_port_count == 0) 665 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 666 up_sem: 667 up(&tdev->td_open_close_sem); 668 dbg("%s - exit %d", __FUNCTION__, status); 669 return status; 670 } 671 672 673 static void ti_close(struct usb_serial_port *port, struct file *file) 674 { 675 struct ti_device *tdev; 676 struct ti_port *tport; 677 int port_number; 678 int status; 679 int do_up; 680 681 dbg("%s - port %d", __FUNCTION__, port->number); 682 683 tdev = usb_get_serial_data(port->serial); 684 tport = usb_get_serial_port_data(port); 685 if (tdev == NULL || tport == NULL) 686 return; 687 688 tport->tp_is_open = 0; 689 690 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1); 691 692 usb_kill_urb(port->read_urb); 693 usb_kill_urb(port->write_urb); 694 tport->tp_write_urb_in_use = 0; 695 696 port_number = port->number - port->serial->minor; 697 698 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__); 699 status = ti_command_out_sync(tdev, TI_CLOSE_PORT, 700 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 701 if (status) 702 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status); 703 704 /* if down is interrupted, continue anyway */ 705 do_up = !down_interruptible(&tdev->td_open_close_sem); 706 --tport->tp_tdev->td_open_port_count; 707 if (tport->tp_tdev->td_open_port_count <= 0) { 708 /* last port is closed, shut down interrupt urb */ 709 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 710 tport->tp_tdev->td_open_port_count = 0; 711 } 712 if (do_up) 713 up(&tdev->td_open_close_sem); 714 715 dbg("%s - exit", __FUNCTION__); 716 } 717 718 719 static int ti_write(struct usb_serial_port *port, const unsigned char *data, 720 int count) 721 { 722 struct ti_port *tport = usb_get_serial_port_data(port); 723 unsigned long flags; 724 725 dbg("%s - port %d", __FUNCTION__, port->number); 726 727 if (count == 0) { 728 dbg("%s - write request of 0 bytes", __FUNCTION__); 729 return 0; 730 } 731 732 if (tport == NULL || !tport->tp_is_open) 733 return -ENODEV; 734 735 spin_lock_irqsave(&tport->tp_lock, flags); 736 count = ti_buf_put(tport->tp_write_buf, data, count); 737 spin_unlock_irqrestore(&tport->tp_lock, flags); 738 739 ti_send(tport); 740 741 return count; 742 } 743 744 745 static int ti_write_room(struct usb_serial_port *port) 746 { 747 struct ti_port *tport = usb_get_serial_port_data(port); 748 int room = 0; 749 unsigned long flags; 750 751 dbg("%s - port %d", __FUNCTION__, port->number); 752 753 if (tport == NULL) 754 return -ENODEV; 755 756 spin_lock_irqsave(&tport->tp_lock, flags); 757 room = ti_buf_space_avail(tport->tp_write_buf); 758 spin_unlock_irqrestore(&tport->tp_lock, flags); 759 760 dbg("%s - returns %d", __FUNCTION__, room); 761 return room; 762 } 763 764 765 static int ti_chars_in_buffer(struct usb_serial_port *port) 766 { 767 struct ti_port *tport = usb_get_serial_port_data(port); 768 int chars = 0; 769 unsigned long flags; 770 771 dbg("%s - port %d", __FUNCTION__, port->number); 772 773 if (tport == NULL) 774 return -ENODEV; 775 776 spin_lock_irqsave(&tport->tp_lock, flags); 777 chars = ti_buf_data_avail(tport->tp_write_buf); 778 spin_unlock_irqrestore(&tport->tp_lock, flags); 779 780 dbg("%s - returns %d", __FUNCTION__, chars); 781 return chars; 782 } 783 784 785 static void ti_throttle(struct usb_serial_port *port) 786 { 787 struct ti_port *tport = usb_get_serial_port_data(port); 788 struct tty_struct *tty; 789 790 dbg("%s - port %d", __FUNCTION__, port->number); 791 792 if (tport == NULL) 793 return; 794 795 tty = port->tty; 796 if (!tty) { 797 dbg("%s - no tty", __FUNCTION__); 798 return; 799 } 800 801 if (I_IXOFF(tty) || C_CRTSCTS(tty)) 802 ti_stop_read(tport, tty); 803 804 } 805 806 807 static void ti_unthrottle(struct usb_serial_port *port) 808 { 809 struct ti_port *tport = usb_get_serial_port_data(port); 810 struct tty_struct *tty; 811 int status; 812 813 dbg("%s - port %d", __FUNCTION__, port->number); 814 815 if (tport == NULL) 816 return; 817 818 tty = port->tty; 819 if (!tty) { 820 dbg("%s - no tty", __FUNCTION__); 821 return; 822 } 823 824 if (I_IXOFF(tty) || C_CRTSCTS(tty)) { 825 status = ti_restart_read(tport, tty); 826 if (status) 827 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status); 828 } 829 } 830 831 832 static int ti_ioctl(struct usb_serial_port *port, struct file *file, 833 unsigned int cmd, unsigned long arg) 834 { 835 struct ti_port *tport = usb_get_serial_port_data(port); 836 struct async_icount cnow; 837 struct async_icount cprev; 838 839 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd); 840 841 if (tport == NULL) 842 return -ENODEV; 843 844 switch (cmd) { 845 case TIOCGSERIAL: 846 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number); 847 return ti_get_serial_info(tport, (struct serial_struct __user *)arg); 848 break; 849 850 case TIOCSSERIAL: 851 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number); 852 return ti_set_serial_info(tport, (struct serial_struct __user *)arg); 853 break; 854 855 case TIOCMIWAIT: 856 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number); 857 cprev = tport->tp_icount; 858 while (1) { 859 interruptible_sleep_on(&tport->tp_msr_wait); 860 if (signal_pending(current)) 861 return -ERESTARTSYS; 862 cnow = tport->tp_icount; 863 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 864 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 865 return -EIO; /* no change => error */ 866 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 867 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 868 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 869 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { 870 return 0; 871 } 872 cprev = cnow; 873 } 874 break; 875 876 case TIOCGICOUNT: 877 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx); 878 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount))) 879 return -EFAULT; 880 return 0; 881 } 882 883 return -ENOIOCTLCMD; 884 } 885 886 887 static void ti_set_termios(struct usb_serial_port *port, 888 struct termios *old_termios) 889 { 890 struct ti_port *tport = usb_get_serial_port_data(port); 891 struct tty_struct *tty = port->tty; 892 struct ti_uart_config *config; 893 tcflag_t cflag,iflag; 894 int baud; 895 int status; 896 int port_number = port->number - port->serial->minor; 897 unsigned int mcr; 898 899 dbg("%s - port %d", __FUNCTION__, port->number); 900 901 if (!tty || !tty->termios) { 902 dbg("%s - no tty or termios", __FUNCTION__); 903 return; 904 } 905 906 cflag = tty->termios->c_cflag; 907 iflag = tty->termios->c_iflag; 908 909 if (old_termios && cflag == old_termios->c_cflag 910 && iflag == old_termios->c_iflag) { 911 dbg("%s - nothing to change", __FUNCTION__); 912 return; 913 } 914 915 dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag); 916 917 if (old_termios) 918 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag); 919 920 if (tport == NULL) 921 return; 922 923 config = kmalloc(sizeof(*config), GFP_KERNEL); 924 if (!config) { 925 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__); 926 return; 927 } 928 929 config->wFlags = 0; 930 931 /* these flags must be set */ 932 config->wFlags |= TI_UART_ENABLE_MS_INTS; 933 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA; 934 config->bUartMode = (__u8)(tport->tp_uart_mode); 935 936 switch (cflag & CSIZE) { 937 case CS5: 938 config->bDataBits = TI_UART_5_DATA_BITS; 939 break; 940 case CS6: 941 config->bDataBits = TI_UART_6_DATA_BITS; 942 break; 943 case CS7: 944 config->bDataBits = TI_UART_7_DATA_BITS; 945 break; 946 default: 947 case CS8: 948 config->bDataBits = TI_UART_8_DATA_BITS; 949 break; 950 } 951 952 if (cflag & PARENB) { 953 if (cflag & PARODD) { 954 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 955 config->bParity = TI_UART_ODD_PARITY; 956 } else { 957 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 958 config->bParity = TI_UART_EVEN_PARITY; 959 } 960 } else { 961 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING; 962 config->bParity = TI_UART_NO_PARITY; 963 } 964 965 if (cflag & CSTOPB) 966 config->bStopBits = TI_UART_2_STOP_BITS; 967 else 968 config->bStopBits = TI_UART_1_STOP_BITS; 969 970 if (cflag & CRTSCTS) { 971 /* RTS flow control must be off to drop RTS for baud rate B0 */ 972 if ((cflag & CBAUD) != B0) 973 config->wFlags |= TI_UART_ENABLE_RTS_IN; 974 config->wFlags |= TI_UART_ENABLE_CTS_OUT; 975 } else { 976 tty->hw_stopped = 0; 977 ti_restart_read(tport, tty); 978 } 979 980 if (I_IXOFF(tty) || I_IXON(tty)) { 981 config->cXon = START_CHAR(tty); 982 config->cXoff = STOP_CHAR(tty); 983 984 if (I_IXOFF(tty)) 985 config->wFlags |= TI_UART_ENABLE_X_IN; 986 else 987 ti_restart_read(tport, tty); 988 989 if (I_IXON(tty)) 990 config->wFlags |= TI_UART_ENABLE_X_OUT; 991 } 992 993 baud = tty_get_baud_rate(tty); 994 if (!baud) baud = 9600; 995 if (tport->tp_tdev->td_is_3410) 996 config->wBaudRate = (__u16)((923077 + baud/2) / baud); 997 else 998 config->wBaudRate = (__u16)((461538 + baud/2) / baud); 999 1000 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d", 1001 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode); 1002 1003 cpu_to_be16s(&config->wBaudRate); 1004 cpu_to_be16s(&config->wFlags); 1005 1006 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG, 1007 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config, 1008 sizeof(*config)); 1009 if (status) 1010 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status); 1011 1012 /* SET_CONFIG asserts RTS and DTR, reset them correctly */ 1013 mcr = tport->tp_shadow_mcr; 1014 /* if baud rate is B0, clear RTS and DTR */ 1015 if ((cflag & CBAUD) == B0) 1016 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS); 1017 status = ti_set_mcr(tport, mcr); 1018 if (status) 1019 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status); 1020 1021 kfree(config); 1022 } 1023 1024 1025 static int ti_tiocmget(struct usb_serial_port *port, struct file *file) 1026 { 1027 struct ti_port *tport = usb_get_serial_port_data(port); 1028 unsigned int result; 1029 unsigned int msr; 1030 unsigned int mcr; 1031 1032 dbg("%s - port %d", __FUNCTION__, port->number); 1033 1034 if (tport == NULL) 1035 return -ENODEV; 1036 1037 msr = tport->tp_msr; 1038 mcr = tport->tp_shadow_mcr; 1039 1040 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0) 1041 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0) 1042 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0) 1043 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0) 1044 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0) 1045 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0) 1046 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0); 1047 1048 dbg("%s - 0x%04X", __FUNCTION__, result); 1049 1050 return result; 1051 } 1052 1053 1054 static int ti_tiocmset(struct usb_serial_port *port, struct file *file, 1055 unsigned int set, unsigned int clear) 1056 { 1057 struct ti_port *tport = usb_get_serial_port_data(port); 1058 unsigned int mcr; 1059 1060 dbg("%s - port %d", __FUNCTION__, port->number); 1061 1062 if (tport == NULL) 1063 return -ENODEV; 1064 1065 mcr = tport->tp_shadow_mcr; 1066 1067 if (set & TIOCM_RTS) 1068 mcr |= TI_MCR_RTS; 1069 if (set & TIOCM_DTR) 1070 mcr |= TI_MCR_DTR; 1071 if (set & TIOCM_LOOP) 1072 mcr |= TI_MCR_LOOP; 1073 1074 if (clear & TIOCM_RTS) 1075 mcr &= ~TI_MCR_RTS; 1076 if (clear & TIOCM_DTR) 1077 mcr &= ~TI_MCR_DTR; 1078 if (clear & TIOCM_LOOP) 1079 mcr &= ~TI_MCR_LOOP; 1080 1081 return ti_set_mcr(tport, mcr); 1082 } 1083 1084 1085 static void ti_break(struct usb_serial_port *port, int break_state) 1086 { 1087 struct ti_port *tport = usb_get_serial_port_data(port); 1088 int status; 1089 1090 dbg("%s - state = %d", __FUNCTION__, break_state); 1091 1092 if (tport == NULL) 1093 return; 1094 1095 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0); 1096 1097 status = ti_write_byte(tport->tp_tdev, 1098 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR, 1099 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0); 1100 1101 if (status) 1102 dbg("%s - error setting break, %d", __FUNCTION__, status); 1103 } 1104 1105 1106 static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs) 1107 { 1108 struct ti_device *tdev = (struct ti_device *)urb->context; 1109 struct usb_serial_port *port; 1110 struct usb_serial *serial = tdev->td_serial; 1111 struct ti_port *tport; 1112 struct device *dev = &urb->dev->dev; 1113 unsigned char *data = urb->transfer_buffer; 1114 int length = urb->actual_length; 1115 int port_number; 1116 int function; 1117 int status; 1118 __u8 msr; 1119 1120 dbg("%s", __FUNCTION__); 1121 1122 switch (urb->status) { 1123 case 0: 1124 break; 1125 case -ECONNRESET: 1126 case -ENOENT: 1127 case -ESHUTDOWN: 1128 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status); 1129 tdev->td_urb_error = 1; 1130 return; 1131 default: 1132 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status); 1133 tdev->td_urb_error = 1; 1134 goto exit; 1135 } 1136 1137 if (length != 2) { 1138 dbg("%s - bad packet size, %d", __FUNCTION__, length); 1139 goto exit; 1140 } 1141 1142 if (data[0] == TI_CODE_HARDWARE_ERROR) { 1143 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]); 1144 goto exit; 1145 } 1146 1147 port_number = TI_GET_PORT_FROM_CODE(data[0]); 1148 function = TI_GET_FUNC_FROM_CODE(data[0]); 1149 1150 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]); 1151 1152 if (port_number >= serial->num_ports) { 1153 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number); 1154 goto exit; 1155 } 1156 1157 port = serial->port[port_number]; 1158 1159 tport = usb_get_serial_port_data(port); 1160 if (!tport) 1161 goto exit; 1162 1163 switch (function) { 1164 case TI_CODE_DATA_ERROR: 1165 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]); 1166 break; 1167 1168 case TI_CODE_MODEM_STATUS: 1169 msr = data[1]; 1170 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr); 1171 ti_handle_new_msr(tport, msr); 1172 break; 1173 1174 default: 1175 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]); 1176 break; 1177 } 1178 1179 exit: 1180 status = usb_submit_urb(urb, GFP_ATOMIC); 1181 if (status) 1182 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status); 1183 } 1184 1185 1186 static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs) 1187 { 1188 struct ti_port *tport = (struct ti_port *)urb->context; 1189 struct usb_serial_port *port = tport->tp_port; 1190 struct device *dev = &urb->dev->dev; 1191 int status = 0; 1192 1193 dbg("%s", __FUNCTION__); 1194 1195 switch (urb->status) { 1196 case 0: 1197 break; 1198 case -ECONNRESET: 1199 case -ENOENT: 1200 case -ESHUTDOWN: 1201 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status); 1202 tport->tp_tdev->td_urb_error = 1; 1203 wake_up_interruptible(&tport->tp_write_wait); 1204 return; 1205 default: 1206 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status ); 1207 tport->tp_tdev->td_urb_error = 1; 1208 wake_up_interruptible(&tport->tp_write_wait); 1209 } 1210 1211 if (urb->status == -EPIPE) 1212 goto exit; 1213 1214 if (urb->status) { 1215 dev_err(dev, "%s - stopping read!\n", __FUNCTION__); 1216 return; 1217 } 1218 1219 if (port->tty && urb->actual_length) { 1220 usb_serial_debug_data(debug, dev, __FUNCTION__, 1221 urb->actual_length, urb->transfer_buffer); 1222 1223 if (!tport->tp_is_open) 1224 dbg("%s - port closed, dropping data", __FUNCTION__); 1225 else 1226 ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer, 1227 urb->actual_length); 1228 1229 spin_lock(&tport->tp_lock); 1230 tport->tp_icount.rx += urb->actual_length; 1231 spin_unlock(&tport->tp_lock); 1232 } 1233 1234 exit: 1235 /* continue to read unless stopping */ 1236 spin_lock(&tport->tp_lock); 1237 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) { 1238 urb->dev = port->serial->dev; 1239 status = usb_submit_urb(urb, GFP_ATOMIC); 1240 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) { 1241 tport->tp_read_urb_state = TI_READ_URB_STOPPED; 1242 } 1243 spin_unlock(&tport->tp_lock); 1244 if (status) 1245 dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status); 1246 } 1247 1248 1249 static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs) 1250 { 1251 struct ti_port *tport = (struct ti_port *)urb->context; 1252 struct usb_serial_port *port = tport->tp_port; 1253 struct device *dev = &urb->dev->dev; 1254 1255 dbg("%s - port %d", __FUNCTION__, port->number); 1256 1257 tport->tp_write_urb_in_use = 0; 1258 1259 switch (urb->status) { 1260 case 0: 1261 break; 1262 case -ECONNRESET: 1263 case -ENOENT: 1264 case -ESHUTDOWN: 1265 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->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", __FUNCTION__, urb->status); 1271 tport->tp_tdev->td_urb_error = 1; 1272 wake_up_interruptible(&tport->tp_write_wait); 1273 } 1274 1275 /* send any buffered data */ 1276 ti_send(tport); 1277 } 1278 1279 1280 static void ti_recv(struct device *dev, struct tty_struct *tty, 1281 unsigned char *data, int length) 1282 { 1283 int cnt; 1284 1285 do { 1286 if (tty->flip.count >= TTY_FLIPBUF_SIZE) { 1287 tty_flip_buffer_push(tty); 1288 if (tty->flip.count >= TTY_FLIPBUF_SIZE) { 1289 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length); 1290 return; 1291 } 1292 } 1293 cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count); 1294 memcpy(tty->flip.char_buf_ptr, data, cnt); 1295 memset(tty->flip.flag_buf_ptr, 0, cnt); 1296 tty->flip.char_buf_ptr += cnt; 1297 tty->flip.flag_buf_ptr += cnt; 1298 tty->flip.count += cnt; 1299 data += cnt; 1300 length -= cnt; 1301 } while (length > 0); 1302 1303 tty_flip_buffer_push(tty); 1304 } 1305 1306 1307 static void ti_send(struct ti_port *tport) 1308 { 1309 int count, result; 1310 struct usb_serial_port *port = tport->tp_port; 1311 struct tty_struct *tty = port->tty; 1312 unsigned long flags; 1313 1314 1315 dbg("%s - port %d", __FUNCTION__, port->number); 1316 1317 spin_lock_irqsave(&tport->tp_lock, flags); 1318 1319 if (tport->tp_write_urb_in_use) { 1320 spin_unlock_irqrestore(&tport->tp_lock, flags); 1321 return; 1322 } 1323 1324 count = ti_buf_get(tport->tp_write_buf, 1325 port->write_urb->transfer_buffer, 1326 port->bulk_out_size); 1327 1328 if (count == 0) { 1329 spin_unlock_irqrestore(&tport->tp_lock, flags); 1330 return; 1331 } 1332 1333 tport->tp_write_urb_in_use = 1; 1334 1335 spin_unlock_irqrestore(&tport->tp_lock, flags); 1336 1337 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer); 1338 1339 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 1340 usb_sndbulkpipe(port->serial->dev, 1341 port->bulk_out_endpointAddress), 1342 port->write_urb->transfer_buffer, count, 1343 ti_bulk_out_callback, tport); 1344 1345 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 1346 if (result) { 1347 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result); 1348 tport->tp_write_urb_in_use = 0; 1349 /* TODO: reschedule ti_send */ 1350 } else { 1351 spin_lock_irqsave(&tport->tp_lock, flags); 1352 tport->tp_icount.tx += count; 1353 spin_unlock_irqrestore(&tport->tp_lock, flags); 1354 } 1355 1356 /* more room in the buffer for new writes, wakeup */ 1357 if (tty) 1358 tty_wakeup(tty); 1359 wake_up_interruptible(&tport->tp_write_wait); 1360 } 1361 1362 1363 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr) 1364 { 1365 int status; 1366 1367 status = ti_write_byte(tport->tp_tdev, 1368 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR, 1369 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr); 1370 1371 if (!status) 1372 tport->tp_shadow_mcr = mcr; 1373 1374 return status; 1375 } 1376 1377 1378 static int ti_get_lsr(struct ti_port *tport) 1379 { 1380 int size,status; 1381 struct ti_device *tdev = tport->tp_tdev; 1382 struct usb_serial_port *port = tport->tp_port; 1383 int port_number = port->number - port->serial->minor; 1384 struct ti_port_status *data; 1385 1386 dbg("%s - port %d", __FUNCTION__, port->number); 1387 1388 size = sizeof(struct ti_port_status); 1389 data = kmalloc(size, GFP_KERNEL); 1390 if (!data) { 1391 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__); 1392 return -ENOMEM; 1393 } 1394 1395 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS, 1396 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size); 1397 if (status) { 1398 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status); 1399 goto free_data; 1400 } 1401 1402 dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR); 1403 1404 tport->tp_lsr = data->bLSR; 1405 1406 free_data: 1407 kfree(data); 1408 return status; 1409 } 1410 1411 1412 static int ti_get_serial_info(struct ti_port *tport, 1413 struct serial_struct __user *ret_arg) 1414 { 1415 struct usb_serial_port *port = tport->tp_port; 1416 struct serial_struct ret_serial; 1417 1418 if (!ret_arg) 1419 return -EFAULT; 1420 1421 memset(&ret_serial, 0, sizeof(ret_serial)); 1422 1423 ret_serial.type = PORT_16550A; 1424 ret_serial.line = port->serial->minor; 1425 ret_serial.port = port->number - port->serial->minor; 1426 ret_serial.flags = tport->tp_flags; 1427 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE; 1428 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800; 1429 ret_serial.closing_wait = tport->tp_closing_wait; 1430 1431 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg))) 1432 return -EFAULT; 1433 1434 return 0; 1435 } 1436 1437 1438 static int ti_set_serial_info(struct ti_port *tport, 1439 struct serial_struct __user *new_arg) 1440 { 1441 struct usb_serial_port *port = tport->tp_port; 1442 struct serial_struct new_serial; 1443 1444 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial))) 1445 return -EFAULT; 1446 1447 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS; 1448 if (port->tty) 1449 port->tty->low_latency = 1450 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1451 tport->tp_closing_wait = new_serial.closing_wait; 1452 1453 return 0; 1454 } 1455 1456 1457 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr) 1458 { 1459 struct async_icount *icount; 1460 struct tty_struct *tty; 1461 unsigned long flags; 1462 1463 dbg("%s - msr 0x%02X", __FUNCTION__, msr); 1464 1465 if (msr & TI_MSR_DELTA_MASK) { 1466 spin_lock_irqsave(&tport->tp_lock, flags); 1467 icount = &tport->tp_icount; 1468 if (msr & TI_MSR_DELTA_CTS) 1469 icount->cts++; 1470 if (msr & TI_MSR_DELTA_DSR) 1471 icount->dsr++; 1472 if (msr & TI_MSR_DELTA_CD) 1473 icount->dcd++; 1474 if (msr & TI_MSR_DELTA_RI) 1475 icount->rng++; 1476 wake_up_interruptible(&tport->tp_msr_wait); 1477 spin_unlock_irqrestore(&tport->tp_lock, flags); 1478 } 1479 1480 tport->tp_msr = msr & TI_MSR_MASK; 1481 1482 /* handle CTS flow control */ 1483 tty = tport->tp_port->tty; 1484 if (tty && C_CRTSCTS(tty)) { 1485 if (msr & TI_MSR_CTS) { 1486 tty->hw_stopped = 0; 1487 tty_wakeup(tty); 1488 } else { 1489 tty->hw_stopped = 1; 1490 } 1491 } 1492 } 1493 1494 1495 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush) 1496 { 1497 struct ti_device *tdev = tport->tp_tdev; 1498 struct usb_serial_port *port = tport->tp_port; 1499 wait_queue_t wait; 1500 unsigned long flags; 1501 1502 dbg("%s - port %d", __FUNCTION__, port->number); 1503 1504 spin_lock_irqsave(&tport->tp_lock, flags); 1505 1506 /* wait for data to drain from the buffer */ 1507 tdev->td_urb_error = 0; 1508 init_waitqueue_entry(&wait, current); 1509 add_wait_queue(&tport->tp_write_wait, &wait); 1510 for (;;) { 1511 set_current_state(TASK_INTERRUPTIBLE); 1512 if (ti_buf_data_avail(tport->tp_write_buf) == 0 1513 || timeout == 0 || signal_pending(current) 1514 || tdev->td_urb_error 1515 || !usb_get_intfdata(port->serial->interface)) /* disconnect */ 1516 break; 1517 spin_unlock_irqrestore(&tport->tp_lock, flags); 1518 timeout = schedule_timeout(timeout); 1519 spin_lock_irqsave(&tport->tp_lock, flags); 1520 } 1521 set_current_state(TASK_RUNNING); 1522 remove_wait_queue(&tport->tp_write_wait, &wait); 1523 1524 /* flush any remaining data in the buffer */ 1525 if (flush) 1526 ti_buf_clear(tport->tp_write_buf); 1527 1528 spin_unlock_irqrestore(&tport->tp_lock, flags); 1529 1530 /* wait for data to drain from the device */ 1531 /* wait for empty tx register, plus 20 ms */ 1532 timeout += jiffies; 1533 tport->tp_lsr &= ~TI_LSR_TX_EMPTY; 1534 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 1535 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error 1536 && usb_get_intfdata(port->serial->interface)) { /* not disconnected */ 1537 if (ti_get_lsr(tport)) 1538 break; 1539 msleep_interruptible(20); 1540 } 1541 } 1542 1543 1544 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty) 1545 { 1546 unsigned long flags; 1547 1548 spin_lock_irqsave(&tport->tp_lock, flags); 1549 1550 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1551 tport->tp_read_urb_state = TI_READ_URB_STOPPING; 1552 1553 spin_unlock_irqrestore(&tport->tp_lock, flags); 1554 } 1555 1556 1557 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty) 1558 { 1559 struct urb *urb; 1560 int status = 0; 1561 unsigned long flags; 1562 1563 spin_lock_irqsave(&tport->tp_lock, flags); 1564 1565 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) { 1566 urb = tport->tp_port->read_urb; 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 } 1572 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1573 1574 spin_unlock_irqrestore(&tport->tp_lock, flags); 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 = (struct circ_buf *)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