1 /* vi: ts=8 sw=8 2 * 3 * TI 3410/5052 USB Serial Driver 4 * 5 * Copyright (C) 2004 Texas Instruments 6 * 7 * This driver is based on the Linux io_ti driver, which is 8 * Copyright (C) 2000-2002 Inside Out Networks 9 * Copyright (C) 2001-2002 Greg Kroah-Hartman 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * For questions or problems with this driver, contact Texas Instruments 17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or 18 * Peter Berger <pberger@brimson.com>. 19 */ 20 21 #include <linux/kernel.h> 22 #include <linux/errno.h> 23 #include <linux/firmware.h> 24 #include <linux/init.h> 25 #include <linux/slab.h> 26 #include <linux/tty.h> 27 #include <linux/tty_driver.h> 28 #include <linux/tty_flip.h> 29 #include <linux/module.h> 30 #include <linux/spinlock.h> 31 #include <linux/ioctl.h> 32 #include <linux/serial.h> 33 #include <linux/kfifo.h> 34 #include <linux/mutex.h> 35 #include <linux/uaccess.h> 36 #include <linux/usb.h> 37 #include <linux/usb/serial.h> 38 39 #include "ti_usb_3410_5052.h" 40 41 /* Defines */ 42 43 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>" 44 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver" 45 46 #define TI_FIRMWARE_BUF_SIZE 16284 47 48 #define TI_WRITE_BUF_SIZE 1024 49 50 #define TI_TRANSFER_TIMEOUT 2 51 52 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */ 53 54 /* supported setserial flags */ 55 #define TI_SET_SERIAL_FLAGS 0 56 57 /* read urb states */ 58 #define TI_READ_URB_RUNNING 0 59 #define TI_READ_URB_STOPPING 1 60 #define TI_READ_URB_STOPPED 2 61 62 #define TI_EXTRA_VID_PID_COUNT 5 63 64 65 /* Structures */ 66 67 struct ti_port { 68 int tp_is_open; 69 __u8 tp_msr; 70 __u8 tp_lsr; 71 __u8 tp_shadow_mcr; 72 __u8 tp_uart_mode; /* 232 or 485 modes */ 73 unsigned int tp_uart_base_addr; 74 int tp_flags; 75 int tp_closing_wait;/* in .01 secs */ 76 struct async_icount tp_icount; 77 wait_queue_head_t tp_msr_wait; /* wait for msr change */ 78 wait_queue_head_t tp_write_wait; 79 struct ti_device *tp_tdev; 80 struct usb_serial_port *tp_port; 81 spinlock_t tp_lock; 82 int tp_read_urb_state; 83 int tp_write_urb_in_use; 84 struct kfifo write_fifo; 85 }; 86 87 struct ti_device { 88 struct mutex td_open_close_lock; 89 int td_open_port_count; 90 struct usb_serial *td_serial; 91 int td_is_3410; 92 int td_urb_error; 93 }; 94 95 96 /* Function Declarations */ 97 98 static int ti_startup(struct usb_serial *serial); 99 static void ti_release(struct usb_serial *serial); 100 static int ti_port_probe(struct usb_serial_port *port); 101 static int ti_port_remove(struct usb_serial_port *port); 102 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port); 103 static void ti_close(struct usb_serial_port *port); 104 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 105 const unsigned char *data, int count); 106 static int ti_write_room(struct tty_struct *tty); 107 static int ti_chars_in_buffer(struct tty_struct *tty); 108 static void ti_throttle(struct tty_struct *tty); 109 static void ti_unthrottle(struct tty_struct *tty); 110 static int ti_ioctl(struct tty_struct *tty, 111 unsigned int cmd, unsigned long arg); 112 static int ti_get_icount(struct tty_struct *tty, 113 struct serial_icounter_struct *icount); 114 static void ti_set_termios(struct tty_struct *tty, 115 struct usb_serial_port *port, struct ktermios *old_termios); 116 static int ti_tiocmget(struct tty_struct *tty); 117 static int ti_tiocmset(struct tty_struct *tty, 118 unsigned int set, unsigned int clear); 119 static void ti_break(struct tty_struct *tty, int break_state); 120 static void ti_interrupt_callback(struct urb *urb); 121 static void ti_bulk_in_callback(struct urb *urb); 122 static void ti_bulk_out_callback(struct urb *urb); 123 124 static void ti_recv(struct device *dev, struct tty_struct *tty, 125 unsigned char *data, int length); 126 static void ti_send(struct ti_port *tport); 127 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr); 128 static int ti_get_lsr(struct ti_port *tport); 129 static int ti_get_serial_info(struct ti_port *tport, 130 struct serial_struct __user *ret_arg); 131 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 132 struct serial_struct __user *new_arg); 133 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr); 134 135 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush); 136 137 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty); 138 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty); 139 140 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 141 __u16 moduleid, __u16 value, __u8 *data, int size); 142 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 143 __u16 moduleid, __u16 value, __u8 *data, int size); 144 145 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev, 146 unsigned long addr, __u8 mask, __u8 byte); 147 148 static int ti_download_firmware(struct ti_device *tdev); 149 150 151 /* Data */ 152 153 /* module parameters */ 154 static int closing_wait = TI_DEFAULT_CLOSING_WAIT; 155 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT]; 156 static unsigned int vendor_3410_count; 157 static ushort product_3410[TI_EXTRA_VID_PID_COUNT]; 158 static unsigned int product_3410_count; 159 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT]; 160 static unsigned int vendor_5052_count; 161 static ushort product_5052[TI_EXTRA_VID_PID_COUNT]; 162 static unsigned int product_5052_count; 163 164 /* supported devices */ 165 /* the array dimension is the number of default entries plus */ 166 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */ 167 /* null entry */ 168 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = { 169 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 170 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 171 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) }, 172 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) }, 173 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) }, 174 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) }, 175 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) }, 176 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) }, 177 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) }, 178 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) }, 179 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) }, 180 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) }, 181 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) }, 182 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) }, 183 { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) }, 184 }; 185 186 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = { 187 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 188 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 189 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 190 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 191 }; 192 193 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = { 194 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 195 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 196 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) }, 197 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) }, 198 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) }, 199 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) }, 200 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) }, 201 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) }, 202 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) }, 203 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) }, 204 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 205 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 206 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 207 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 208 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) }, 209 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) }, 210 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) }, 211 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) }, 212 { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) }, 213 { } 214 }; 215 216 static struct usb_serial_driver ti_1port_device = { 217 .driver = { 218 .owner = THIS_MODULE, 219 .name = "ti_usb_3410_5052_1", 220 }, 221 .description = "TI USB 3410 1 port adapter", 222 .id_table = ti_id_table_3410, 223 .num_ports = 1, 224 .attach = ti_startup, 225 .release = ti_release, 226 .port_probe = ti_port_probe, 227 .port_remove = ti_port_remove, 228 .open = ti_open, 229 .close = ti_close, 230 .write = ti_write, 231 .write_room = ti_write_room, 232 .chars_in_buffer = ti_chars_in_buffer, 233 .throttle = ti_throttle, 234 .unthrottle = ti_unthrottle, 235 .ioctl = ti_ioctl, 236 .set_termios = ti_set_termios, 237 .tiocmget = ti_tiocmget, 238 .tiocmset = ti_tiocmset, 239 .get_icount = ti_get_icount, 240 .break_ctl = ti_break, 241 .read_int_callback = ti_interrupt_callback, 242 .read_bulk_callback = ti_bulk_in_callback, 243 .write_bulk_callback = ti_bulk_out_callback, 244 }; 245 246 static struct usb_serial_driver ti_2port_device = { 247 .driver = { 248 .owner = THIS_MODULE, 249 .name = "ti_usb_3410_5052_2", 250 }, 251 .description = "TI USB 5052 2 port adapter", 252 .id_table = ti_id_table_5052, 253 .num_ports = 2, 254 .attach = ti_startup, 255 .release = ti_release, 256 .port_probe = ti_port_probe, 257 .port_remove = ti_port_remove, 258 .open = ti_open, 259 .close = ti_close, 260 .write = ti_write, 261 .write_room = ti_write_room, 262 .chars_in_buffer = ti_chars_in_buffer, 263 .throttle = ti_throttle, 264 .unthrottle = ti_unthrottle, 265 .ioctl = ti_ioctl, 266 .set_termios = ti_set_termios, 267 .tiocmget = ti_tiocmget, 268 .tiocmset = ti_tiocmset, 269 .get_icount = ti_get_icount, 270 .break_ctl = ti_break, 271 .read_int_callback = ti_interrupt_callback, 272 .read_bulk_callback = ti_bulk_in_callback, 273 .write_bulk_callback = ti_bulk_out_callback, 274 }; 275 276 static struct usb_serial_driver * const serial_drivers[] = { 277 &ti_1port_device, &ti_2port_device, NULL 278 }; 279 280 /* Module */ 281 282 MODULE_AUTHOR(TI_DRIVER_AUTHOR); 283 MODULE_DESCRIPTION(TI_DRIVER_DESC); 284 MODULE_LICENSE("GPL"); 285 286 MODULE_FIRMWARE("ti_3410.fw"); 287 MODULE_FIRMWARE("ti_5052.fw"); 288 MODULE_FIRMWARE("mts_cdma.fw"); 289 MODULE_FIRMWARE("mts_gsm.fw"); 290 MODULE_FIRMWARE("mts_edge.fw"); 291 MODULE_FIRMWARE("mts_mt9234mu.fw"); 292 MODULE_FIRMWARE("mts_mt9234zba.fw"); 293 294 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 295 MODULE_PARM_DESC(closing_wait, 296 "Maximum wait for data to drain in close, in .01 secs, default is 4000"); 297 298 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO); 299 MODULE_PARM_DESC(vendor_3410, 300 "Vendor ids for 3410 based devices, 1-5 short integers"); 301 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO); 302 MODULE_PARM_DESC(product_3410, 303 "Product ids for 3410 based devices, 1-5 short integers"); 304 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO); 305 MODULE_PARM_DESC(vendor_5052, 306 "Vendor ids for 5052 based devices, 1-5 short integers"); 307 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO); 308 MODULE_PARM_DESC(product_5052, 309 "Product ids for 5052 based devices, 1-5 short integers"); 310 311 MODULE_DEVICE_TABLE(usb, ti_id_table_combined); 312 313 314 /* Functions */ 315 316 static int __init ti_init(void) 317 { 318 int i, j, c; 319 320 /* insert extra vendor and product ids */ 321 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1; 322 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1; 323 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) { 324 ti_id_table_3410[j].idVendor = vendor_3410[i]; 325 ti_id_table_3410[j].idProduct = product_3410[i]; 326 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 327 ti_id_table_combined[c].idVendor = vendor_3410[i]; 328 ti_id_table_combined[c].idProduct = product_3410[i]; 329 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 330 } 331 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1; 332 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) { 333 ti_id_table_5052[j].idVendor = vendor_5052[i]; 334 ti_id_table_5052[j].idProduct = product_5052[i]; 335 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 336 ti_id_table_combined[c].idVendor = vendor_5052[i]; 337 ti_id_table_combined[c].idProduct = product_5052[i]; 338 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 339 } 340 341 return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined); 342 } 343 344 static void __exit ti_exit(void) 345 { 346 usb_serial_deregister_drivers(serial_drivers); 347 } 348 349 module_init(ti_init); 350 module_exit(ti_exit); 351 352 353 static int ti_startup(struct usb_serial *serial) 354 { 355 struct ti_device *tdev; 356 struct usb_device *dev = serial->dev; 357 int status; 358 359 dev_dbg(&dev->dev, 360 "%s - product 0x%4X, num configurations %d, configuration value %d", 361 __func__, le16_to_cpu(dev->descriptor.idProduct), 362 dev->descriptor.bNumConfigurations, 363 dev->actconfig->desc.bConfigurationValue); 364 365 /* create device structure */ 366 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL); 367 if (tdev == NULL) { 368 dev_err(&dev->dev, "%s - out of memory\n", __func__); 369 return -ENOMEM; 370 } 371 mutex_init(&tdev->td_open_close_lock); 372 tdev->td_serial = serial; 373 usb_set_serial_data(serial, tdev); 374 375 /* determine device type */ 376 if (usb_match_id(serial->interface, ti_id_table_3410)) 377 tdev->td_is_3410 = 1; 378 dev_dbg(&dev->dev, "%s - device type is %s\n", __func__, 379 tdev->td_is_3410 ? "3410" : "5052"); 380 381 /* if we have only 1 configuration, download firmware */ 382 if (dev->descriptor.bNumConfigurations == 1) { 383 status = ti_download_firmware(tdev); 384 385 if (status != 0) 386 goto free_tdev; 387 388 /* 3410 must be reset, 5052 resets itself */ 389 if (tdev->td_is_3410) { 390 msleep_interruptible(100); 391 usb_reset_device(dev); 392 } 393 394 status = -ENODEV; 395 goto free_tdev; 396 } 397 398 /* the second configuration must be set */ 399 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) { 400 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG); 401 status = status ? status : -ENODEV; 402 goto free_tdev; 403 } 404 405 return 0; 406 407 free_tdev: 408 kfree(tdev); 409 usb_set_serial_data(serial, NULL); 410 return status; 411 } 412 413 414 static void ti_release(struct usb_serial *serial) 415 { 416 struct ti_device *tdev = usb_get_serial_data(serial); 417 418 kfree(tdev); 419 } 420 421 static int ti_port_probe(struct usb_serial_port *port) 422 { 423 struct ti_port *tport; 424 425 tport = kzalloc(sizeof(*tport), GFP_KERNEL); 426 if (!tport) 427 return -ENOMEM; 428 429 spin_lock_init(&tport->tp_lock); 430 if (port == port->serial->port[0]) 431 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR; 432 else 433 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR; 434 tport->tp_closing_wait = closing_wait; 435 init_waitqueue_head(&tport->tp_msr_wait); 436 init_waitqueue_head(&tport->tp_write_wait); 437 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, GFP_KERNEL)) { 438 kfree(tport); 439 return -ENOMEM; 440 } 441 tport->tp_port = port; 442 tport->tp_tdev = usb_get_serial_data(port->serial); 443 tport->tp_uart_mode = 0; /* default is RS232 */ 444 445 usb_set_serial_port_data(port, tport); 446 447 return 0; 448 } 449 450 static int ti_port_remove(struct usb_serial_port *port) 451 { 452 struct ti_port *tport; 453 454 tport = usb_get_serial_port_data(port); 455 kfifo_free(&tport->write_fifo); 456 kfree(tport); 457 458 return 0; 459 } 460 461 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port) 462 { 463 struct ti_port *tport = usb_get_serial_port_data(port); 464 struct ti_device *tdev; 465 struct usb_device *dev; 466 struct urb *urb; 467 int port_number; 468 int status; 469 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 470 TI_PIPE_TIMEOUT_ENABLE | 471 (TI_TRANSFER_TIMEOUT << 2)); 472 473 if (tport == NULL) 474 return -ENODEV; 475 476 dev = port->serial->dev; 477 tdev = tport->tp_tdev; 478 479 /* only one open on any port on a device at a time */ 480 if (mutex_lock_interruptible(&tdev->td_open_close_lock)) 481 return -ERESTARTSYS; 482 483 port_number = port->number - port->serial->minor; 484 485 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount)); 486 487 tport->tp_msr = 0; 488 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR); 489 490 /* start interrupt urb the first time a port is opened on this device */ 491 if (tdev->td_open_port_count == 0) { 492 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__); 493 urb = tdev->td_serial->port[0]->interrupt_in_urb; 494 if (!urb) { 495 dev_err(&port->dev, "%s - no interrupt urb\n", __func__); 496 status = -EINVAL; 497 goto release_lock; 498 } 499 urb->context = tdev; 500 status = usb_submit_urb(urb, GFP_KERNEL); 501 if (status) { 502 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status); 503 goto release_lock; 504 } 505 } 506 507 if (tty) 508 ti_set_termios(tty, port, &tty->termios); 509 510 dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__); 511 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 512 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 513 if (status) { 514 dev_err(&port->dev, "%s - cannot send open command, %d\n", 515 __func__, status); 516 goto unlink_int_urb; 517 } 518 519 dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__); 520 status = ti_command_out_sync(tdev, TI_START_PORT, 521 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 522 if (status) { 523 dev_err(&port->dev, "%s - cannot send start command, %d\n", 524 __func__, status); 525 goto unlink_int_urb; 526 } 527 528 dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__); 529 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 530 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0); 531 if (status) { 532 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", 533 __func__, status); 534 goto unlink_int_urb; 535 } 536 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 537 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0); 538 if (status) { 539 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", 540 __func__, status); 541 goto unlink_int_urb; 542 } 543 544 /* reset the data toggle on the bulk endpoints to work around bug in 545 * host controllers where things get out of sync some times */ 546 usb_clear_halt(dev, port->write_urb->pipe); 547 usb_clear_halt(dev, port->read_urb->pipe); 548 549 if (tty) 550 ti_set_termios(tty, port, &tty->termios); 551 552 dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__); 553 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 554 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 555 if (status) { 556 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", 557 __func__, status); 558 goto unlink_int_urb; 559 } 560 561 dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__); 562 status = ti_command_out_sync(tdev, TI_START_PORT, 563 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 564 if (status) { 565 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", 566 __func__, status); 567 goto unlink_int_urb; 568 } 569 570 /* start read urb */ 571 dev_dbg(&port->dev, "%s - start read urb\n", __func__); 572 urb = port->read_urb; 573 if (!urb) { 574 dev_err(&port->dev, "%s - no read urb\n", __func__); 575 status = -EINVAL; 576 goto unlink_int_urb; 577 } 578 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 579 urb->context = tport; 580 status = usb_submit_urb(urb, GFP_KERNEL); 581 if (status) { 582 dev_err(&port->dev, "%s - submit read urb failed, %d\n", 583 __func__, status); 584 goto unlink_int_urb; 585 } 586 587 tport->tp_is_open = 1; 588 ++tdev->td_open_port_count; 589 590 goto release_lock; 591 592 unlink_int_urb: 593 if (tdev->td_open_port_count == 0) 594 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 595 release_lock: 596 mutex_unlock(&tdev->td_open_close_lock); 597 dev_dbg(&port->dev, "%s - exit %d\n", __func__, status); 598 return status; 599 } 600 601 602 static void ti_close(struct usb_serial_port *port) 603 { 604 struct ti_device *tdev; 605 struct ti_port *tport; 606 int port_number; 607 int status; 608 int do_unlock; 609 610 tdev = usb_get_serial_data(port->serial); 611 tport = usb_get_serial_port_data(port); 612 if (tdev == NULL || tport == NULL) 613 return; 614 615 tport->tp_is_open = 0; 616 617 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1); 618 619 usb_kill_urb(port->read_urb); 620 usb_kill_urb(port->write_urb); 621 tport->tp_write_urb_in_use = 0; 622 623 port_number = port->number - port->serial->minor; 624 625 dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__); 626 status = ti_command_out_sync(tdev, TI_CLOSE_PORT, 627 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 628 if (status) 629 dev_err(&port->dev, 630 "%s - cannot send close port command, %d\n" 631 , __func__, status); 632 633 /* if mutex_lock is interrupted, continue anyway */ 634 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock); 635 --tport->tp_tdev->td_open_port_count; 636 if (tport->tp_tdev->td_open_port_count <= 0) { 637 /* last port is closed, shut down interrupt urb */ 638 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 639 tport->tp_tdev->td_open_port_count = 0; 640 } 641 if (do_unlock) 642 mutex_unlock(&tdev->td_open_close_lock); 643 } 644 645 646 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 647 const unsigned char *data, int count) 648 { 649 struct ti_port *tport = usb_get_serial_port_data(port); 650 651 if (count == 0) { 652 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__); 653 return 0; 654 } 655 656 if (tport == NULL || !tport->tp_is_open) 657 return -ENODEV; 658 659 count = kfifo_in_locked(&tport->write_fifo, data, count, 660 &tport->tp_lock); 661 ti_send(tport); 662 663 return count; 664 } 665 666 667 static int ti_write_room(struct tty_struct *tty) 668 { 669 struct usb_serial_port *port = tty->driver_data; 670 struct ti_port *tport = usb_get_serial_port_data(port); 671 int room = 0; 672 unsigned long flags; 673 674 if (tport == NULL) 675 return 0; 676 677 spin_lock_irqsave(&tport->tp_lock, flags); 678 room = kfifo_avail(&tport->write_fifo); 679 spin_unlock_irqrestore(&tport->tp_lock, flags); 680 681 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); 682 return room; 683 } 684 685 686 static int ti_chars_in_buffer(struct tty_struct *tty) 687 { 688 struct usb_serial_port *port = tty->driver_data; 689 struct ti_port *tport = usb_get_serial_port_data(port); 690 int chars = 0; 691 unsigned long flags; 692 693 if (tport == NULL) 694 return 0; 695 696 spin_lock_irqsave(&tport->tp_lock, flags); 697 chars = kfifo_len(&tport->write_fifo); 698 spin_unlock_irqrestore(&tport->tp_lock, flags); 699 700 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 701 return chars; 702 } 703 704 705 static void ti_throttle(struct tty_struct *tty) 706 { 707 struct usb_serial_port *port = tty->driver_data; 708 struct ti_port *tport = usb_get_serial_port_data(port); 709 710 if (tport == NULL) 711 return; 712 713 if (I_IXOFF(tty) || C_CRTSCTS(tty)) 714 ti_stop_read(tport, tty); 715 716 } 717 718 719 static void ti_unthrottle(struct tty_struct *tty) 720 { 721 struct usb_serial_port *port = tty->driver_data; 722 struct ti_port *tport = usb_get_serial_port_data(port); 723 int status; 724 725 if (tport == NULL) 726 return; 727 728 if (I_IXOFF(tty) || C_CRTSCTS(tty)) { 729 status = ti_restart_read(tport, tty); 730 if (status) 731 dev_err(&port->dev, "%s - cannot restart read, %d\n", 732 __func__, status); 733 } 734 } 735 736 static int ti_get_icount(struct tty_struct *tty, 737 struct serial_icounter_struct *icount) 738 { 739 struct usb_serial_port *port = tty->driver_data; 740 struct ti_port *tport = usb_get_serial_port_data(port); 741 struct async_icount cnow = tport->tp_icount; 742 743 dev_dbg(&port->dev, "%s - TIOCGICOUNT RX=%d, TX=%d\n", __func__, 744 cnow.rx, cnow.tx); 745 746 icount->cts = cnow.cts; 747 icount->dsr = cnow.dsr; 748 icount->rng = cnow.rng; 749 icount->dcd = cnow.dcd; 750 icount->rx = cnow.rx; 751 icount->tx = cnow.tx; 752 icount->frame = cnow.frame; 753 icount->overrun = cnow.overrun; 754 icount->parity = cnow.parity; 755 icount->brk = cnow.brk; 756 icount->buf_overrun = cnow.buf_overrun; 757 758 return 0; 759 } 760 761 static int ti_ioctl(struct tty_struct *tty, 762 unsigned int cmd, unsigned long arg) 763 { 764 struct usb_serial_port *port = tty->driver_data; 765 struct ti_port *tport = usb_get_serial_port_data(port); 766 struct async_icount cnow; 767 struct async_icount cprev; 768 769 dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd); 770 771 if (tport == NULL) 772 return -ENODEV; 773 774 switch (cmd) { 775 case TIOCGSERIAL: 776 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__); 777 return ti_get_serial_info(tport, 778 (struct serial_struct __user *)arg); 779 case TIOCSSERIAL: 780 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__); 781 return ti_set_serial_info(tty, tport, 782 (struct serial_struct __user *)arg); 783 case TIOCMIWAIT: 784 dev_dbg(&port->dev, "%s - TIOCMIWAIT\n", __func__); 785 cprev = tport->tp_icount; 786 while (1) { 787 interruptible_sleep_on(&tport->tp_msr_wait); 788 if (signal_pending(current)) 789 return -ERESTARTSYS; 790 cnow = tport->tp_icount; 791 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 792 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 793 return -EIO; /* no change => error */ 794 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 795 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 796 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 797 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) 798 return 0; 799 cprev = cnow; 800 } 801 break; 802 } 803 return -ENOIOCTLCMD; 804 } 805 806 807 static void ti_set_termios(struct tty_struct *tty, 808 struct usb_serial_port *port, struct ktermios *old_termios) 809 { 810 struct ti_port *tport = usb_get_serial_port_data(port); 811 struct ti_uart_config *config; 812 tcflag_t cflag, iflag; 813 int baud; 814 int status; 815 int port_number = port->number - port->serial->minor; 816 unsigned int mcr; 817 818 cflag = tty->termios.c_cflag; 819 iflag = tty->termios.c_iflag; 820 821 dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag); 822 dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__, 823 old_termios->c_cflag, old_termios->c_iflag); 824 825 if (tport == NULL) 826 return; 827 828 config = kmalloc(sizeof(*config), GFP_KERNEL); 829 if (!config) { 830 dev_err(&port->dev, "%s - out of memory\n", __func__); 831 return; 832 } 833 834 config->wFlags = 0; 835 836 /* these flags must be set */ 837 config->wFlags |= TI_UART_ENABLE_MS_INTS; 838 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA; 839 config->bUartMode = (__u8)(tport->tp_uart_mode); 840 841 switch (cflag & CSIZE) { 842 case CS5: 843 config->bDataBits = TI_UART_5_DATA_BITS; 844 break; 845 case CS6: 846 config->bDataBits = TI_UART_6_DATA_BITS; 847 break; 848 case CS7: 849 config->bDataBits = TI_UART_7_DATA_BITS; 850 break; 851 default: 852 case CS8: 853 config->bDataBits = TI_UART_8_DATA_BITS; 854 break; 855 } 856 857 /* CMSPAR isn't supported by this driver */ 858 tty->termios.c_cflag &= ~CMSPAR; 859 860 if (cflag & PARENB) { 861 if (cflag & PARODD) { 862 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 863 config->bParity = TI_UART_ODD_PARITY; 864 } else { 865 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 866 config->bParity = TI_UART_EVEN_PARITY; 867 } 868 } else { 869 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING; 870 config->bParity = TI_UART_NO_PARITY; 871 } 872 873 if (cflag & CSTOPB) 874 config->bStopBits = TI_UART_2_STOP_BITS; 875 else 876 config->bStopBits = TI_UART_1_STOP_BITS; 877 878 if (cflag & CRTSCTS) { 879 /* RTS flow control must be off to drop RTS for baud rate B0 */ 880 if ((cflag & CBAUD) != B0) 881 config->wFlags |= TI_UART_ENABLE_RTS_IN; 882 config->wFlags |= TI_UART_ENABLE_CTS_OUT; 883 } else { 884 tty->hw_stopped = 0; 885 ti_restart_read(tport, tty); 886 } 887 888 if (I_IXOFF(tty) || I_IXON(tty)) { 889 config->cXon = START_CHAR(tty); 890 config->cXoff = STOP_CHAR(tty); 891 892 if (I_IXOFF(tty)) 893 config->wFlags |= TI_UART_ENABLE_X_IN; 894 else 895 ti_restart_read(tport, tty); 896 897 if (I_IXON(tty)) 898 config->wFlags |= TI_UART_ENABLE_X_OUT; 899 } 900 901 baud = tty_get_baud_rate(tty); 902 if (!baud) 903 baud = 9600; 904 if (tport->tp_tdev->td_is_3410) 905 config->wBaudRate = (__u16)((923077 + baud/2) / baud); 906 else 907 config->wBaudRate = (__u16)((461538 + baud/2) / baud); 908 909 /* FIXME: Should calculate resulting baud here and report it back */ 910 if ((cflag & CBAUD) != B0) 911 tty_encode_baud_rate(tty, baud, baud); 912 913 dev_dbg(&port->dev, 914 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d", 915 __func__, baud, config->wBaudRate, config->wFlags, 916 config->bDataBits, config->bParity, config->bStopBits, 917 config->cXon, config->cXoff, config->bUartMode); 918 919 cpu_to_be16s(&config->wBaudRate); 920 cpu_to_be16s(&config->wFlags); 921 922 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG, 923 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config, 924 sizeof(*config)); 925 if (status) 926 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", 927 __func__, port_number, status); 928 929 /* SET_CONFIG asserts RTS and DTR, reset them correctly */ 930 mcr = tport->tp_shadow_mcr; 931 /* if baud rate is B0, clear RTS and DTR */ 932 if ((cflag & CBAUD) == B0) 933 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS); 934 status = ti_set_mcr(tport, mcr); 935 if (status) 936 dev_err(&port->dev, 937 "%s - cannot set modem control on port %d, %d\n", 938 __func__, port_number, status); 939 940 kfree(config); 941 } 942 943 944 static int ti_tiocmget(struct tty_struct *tty) 945 { 946 struct usb_serial_port *port = tty->driver_data; 947 struct ti_port *tport = usb_get_serial_port_data(port); 948 unsigned int result; 949 unsigned int msr; 950 unsigned int mcr; 951 unsigned long flags; 952 953 if (tport == NULL) 954 return -ENODEV; 955 956 spin_lock_irqsave(&tport->tp_lock, flags); 957 msr = tport->tp_msr; 958 mcr = tport->tp_shadow_mcr; 959 spin_unlock_irqrestore(&tport->tp_lock, flags); 960 961 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0) 962 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0) 963 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0) 964 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0) 965 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0) 966 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0) 967 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0); 968 969 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 970 971 return result; 972 } 973 974 975 static int ti_tiocmset(struct tty_struct *tty, 976 unsigned int set, unsigned int clear) 977 { 978 struct usb_serial_port *port = tty->driver_data; 979 struct ti_port *tport = usb_get_serial_port_data(port); 980 unsigned int mcr; 981 unsigned long flags; 982 983 if (tport == NULL) 984 return -ENODEV; 985 986 spin_lock_irqsave(&tport->tp_lock, flags); 987 mcr = tport->tp_shadow_mcr; 988 989 if (set & TIOCM_RTS) 990 mcr |= TI_MCR_RTS; 991 if (set & TIOCM_DTR) 992 mcr |= TI_MCR_DTR; 993 if (set & TIOCM_LOOP) 994 mcr |= TI_MCR_LOOP; 995 996 if (clear & TIOCM_RTS) 997 mcr &= ~TI_MCR_RTS; 998 if (clear & TIOCM_DTR) 999 mcr &= ~TI_MCR_DTR; 1000 if (clear & TIOCM_LOOP) 1001 mcr &= ~TI_MCR_LOOP; 1002 spin_unlock_irqrestore(&tport->tp_lock, flags); 1003 1004 return ti_set_mcr(tport, mcr); 1005 } 1006 1007 1008 static void ti_break(struct tty_struct *tty, int break_state) 1009 { 1010 struct usb_serial_port *port = tty->driver_data; 1011 struct ti_port *tport = usb_get_serial_port_data(port); 1012 int status; 1013 1014 dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state); 1015 1016 if (tport == NULL) 1017 return; 1018 1019 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0); 1020 1021 status = ti_write_byte(port, tport->tp_tdev, 1022 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR, 1023 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0); 1024 1025 if (status) 1026 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status); 1027 } 1028 1029 1030 static void ti_interrupt_callback(struct urb *urb) 1031 { 1032 struct ti_device *tdev = urb->context; 1033 struct usb_serial_port *port; 1034 struct usb_serial *serial = tdev->td_serial; 1035 struct ti_port *tport; 1036 struct device *dev = &urb->dev->dev; 1037 unsigned char *data = urb->transfer_buffer; 1038 int length = urb->actual_length; 1039 int port_number; 1040 int function; 1041 int status = urb->status; 1042 int retval; 1043 __u8 msr; 1044 1045 switch (status) { 1046 case 0: 1047 break; 1048 case -ECONNRESET: 1049 case -ENOENT: 1050 case -ESHUTDOWN: 1051 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status); 1052 tdev->td_urb_error = 1; 1053 return; 1054 default: 1055 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status); 1056 tdev->td_urb_error = 1; 1057 goto exit; 1058 } 1059 1060 if (length != 2) { 1061 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length); 1062 goto exit; 1063 } 1064 1065 if (data[0] == TI_CODE_HARDWARE_ERROR) { 1066 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]); 1067 goto exit; 1068 } 1069 1070 port_number = TI_GET_PORT_FROM_CODE(data[0]); 1071 function = TI_GET_FUNC_FROM_CODE(data[0]); 1072 1073 dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n", 1074 __func__, port_number, function, data[1]); 1075 1076 if (port_number >= serial->num_ports) { 1077 dev_err(dev, "%s - bad port number, %d\n", 1078 __func__, port_number); 1079 goto exit; 1080 } 1081 1082 port = serial->port[port_number]; 1083 1084 tport = usb_get_serial_port_data(port); 1085 if (!tport) 1086 goto exit; 1087 1088 switch (function) { 1089 case TI_CODE_DATA_ERROR: 1090 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", 1091 __func__, port_number, data[1]); 1092 break; 1093 1094 case TI_CODE_MODEM_STATUS: 1095 msr = data[1]; 1096 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr); 1097 ti_handle_new_msr(tport, msr); 1098 break; 1099 1100 default: 1101 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", 1102 __func__, data[1]); 1103 break; 1104 } 1105 1106 exit: 1107 retval = usb_submit_urb(urb, GFP_ATOMIC); 1108 if (retval) 1109 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", 1110 __func__, retval); 1111 } 1112 1113 1114 static void ti_bulk_in_callback(struct urb *urb) 1115 { 1116 struct ti_port *tport = urb->context; 1117 struct usb_serial_port *port = tport->tp_port; 1118 struct device *dev = &urb->dev->dev; 1119 int status = urb->status; 1120 int retval = 0; 1121 struct tty_struct *tty; 1122 1123 switch (status) { 1124 case 0: 1125 break; 1126 case -ECONNRESET: 1127 case -ENOENT: 1128 case -ESHUTDOWN: 1129 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status); 1130 tport->tp_tdev->td_urb_error = 1; 1131 wake_up_interruptible(&tport->tp_write_wait); 1132 return; 1133 default: 1134 dev_err(dev, "%s - nonzero urb status, %d\n", 1135 __func__, status); 1136 tport->tp_tdev->td_urb_error = 1; 1137 wake_up_interruptible(&tport->tp_write_wait); 1138 } 1139 1140 if (status == -EPIPE) 1141 goto exit; 1142 1143 if (status) { 1144 dev_err(dev, "%s - stopping read!\n", __func__); 1145 return; 1146 } 1147 1148 tty = tty_port_tty_get(&port->port); 1149 if (tty) { 1150 if (urb->actual_length) { 1151 usb_serial_debug_data(dev, __func__, urb->actual_length, 1152 urb->transfer_buffer); 1153 1154 if (!tport->tp_is_open) 1155 dev_dbg(dev, "%s - port closed, dropping data\n", 1156 __func__); 1157 else 1158 ti_recv(&urb->dev->dev, tty, 1159 urb->transfer_buffer, 1160 urb->actual_length); 1161 spin_lock(&tport->tp_lock); 1162 tport->tp_icount.rx += urb->actual_length; 1163 spin_unlock(&tport->tp_lock); 1164 } 1165 tty_kref_put(tty); 1166 } 1167 1168 exit: 1169 /* continue to read unless stopping */ 1170 spin_lock(&tport->tp_lock); 1171 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1172 retval = usb_submit_urb(urb, GFP_ATOMIC); 1173 else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) 1174 tport->tp_read_urb_state = TI_READ_URB_STOPPED; 1175 1176 spin_unlock(&tport->tp_lock); 1177 if (retval) 1178 dev_err(dev, "%s - resubmit read urb failed, %d\n", 1179 __func__, retval); 1180 } 1181 1182 1183 static void ti_bulk_out_callback(struct urb *urb) 1184 { 1185 struct ti_port *tport = urb->context; 1186 struct usb_serial_port *port = tport->tp_port; 1187 int status = urb->status; 1188 1189 tport->tp_write_urb_in_use = 0; 1190 1191 switch (status) { 1192 case 0: 1193 break; 1194 case -ECONNRESET: 1195 case -ENOENT: 1196 case -ESHUTDOWN: 1197 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status); 1198 tport->tp_tdev->td_urb_error = 1; 1199 wake_up_interruptible(&tport->tp_write_wait); 1200 return; 1201 default: 1202 dev_err_console(port, "%s - nonzero urb status, %d\n", 1203 __func__, status); 1204 tport->tp_tdev->td_urb_error = 1; 1205 wake_up_interruptible(&tport->tp_write_wait); 1206 } 1207 1208 /* send any buffered data */ 1209 ti_send(tport); 1210 } 1211 1212 1213 static void ti_recv(struct device *dev, struct tty_struct *tty, 1214 unsigned char *data, int length) 1215 { 1216 int cnt; 1217 1218 do { 1219 cnt = tty_insert_flip_string(tty, data, length); 1220 if (cnt < length) { 1221 dev_err(dev, "%s - dropping data, %d bytes lost\n", 1222 __func__, length - cnt); 1223 if (cnt == 0) 1224 break; 1225 } 1226 tty_flip_buffer_push(tty); 1227 data += cnt; 1228 length -= cnt; 1229 } while (length > 0); 1230 1231 } 1232 1233 1234 static void ti_send(struct ti_port *tport) 1235 { 1236 int count, result; 1237 struct usb_serial_port *port = tport->tp_port; 1238 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */ 1239 unsigned long flags; 1240 1241 spin_lock_irqsave(&tport->tp_lock, flags); 1242 1243 if (tport->tp_write_urb_in_use) 1244 goto unlock; 1245 1246 count = kfifo_out(&tport->write_fifo, 1247 port->write_urb->transfer_buffer, 1248 port->bulk_out_size); 1249 1250 if (count == 0) 1251 goto unlock; 1252 1253 tport->tp_write_urb_in_use = 1; 1254 1255 spin_unlock_irqrestore(&tport->tp_lock, flags); 1256 1257 usb_serial_debug_data(&port->dev, __func__, count, 1258 port->write_urb->transfer_buffer); 1259 1260 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 1261 usb_sndbulkpipe(port->serial->dev, 1262 port->bulk_out_endpointAddress), 1263 port->write_urb->transfer_buffer, count, 1264 ti_bulk_out_callback, tport); 1265 1266 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 1267 if (result) { 1268 dev_err_console(port, "%s - submit write urb failed, %d\n", 1269 __func__, result); 1270 tport->tp_write_urb_in_use = 0; 1271 /* TODO: reschedule ti_send */ 1272 } else { 1273 spin_lock_irqsave(&tport->tp_lock, flags); 1274 tport->tp_icount.tx += count; 1275 spin_unlock_irqrestore(&tport->tp_lock, flags); 1276 } 1277 1278 /* more room in the buffer for new writes, wakeup */ 1279 if (tty) 1280 tty_wakeup(tty); 1281 tty_kref_put(tty); 1282 wake_up_interruptible(&tport->tp_write_wait); 1283 return; 1284 unlock: 1285 spin_unlock_irqrestore(&tport->tp_lock, flags); 1286 tty_kref_put(tty); 1287 return; 1288 } 1289 1290 1291 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr) 1292 { 1293 unsigned long flags; 1294 int status; 1295 1296 status = ti_write_byte(tport->tp_port, tport->tp_tdev, 1297 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR, 1298 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr); 1299 1300 spin_lock_irqsave(&tport->tp_lock, flags); 1301 if (!status) 1302 tport->tp_shadow_mcr = mcr; 1303 spin_unlock_irqrestore(&tport->tp_lock, flags); 1304 1305 return status; 1306 } 1307 1308 1309 static int ti_get_lsr(struct ti_port *tport) 1310 { 1311 int size, status; 1312 struct ti_device *tdev = tport->tp_tdev; 1313 struct usb_serial_port *port = tport->tp_port; 1314 int port_number = port->number - port->serial->minor; 1315 struct ti_port_status *data; 1316 1317 size = sizeof(struct ti_port_status); 1318 data = kmalloc(size, GFP_KERNEL); 1319 if (!data) { 1320 dev_err(&port->dev, "%s - out of memory\n", __func__); 1321 return -ENOMEM; 1322 } 1323 1324 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS, 1325 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size); 1326 if (status) { 1327 dev_err(&port->dev, 1328 "%s - get port status command failed, %d\n", 1329 __func__, status); 1330 goto free_data; 1331 } 1332 1333 dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR); 1334 1335 tport->tp_lsr = data->bLSR; 1336 1337 free_data: 1338 kfree(data); 1339 return status; 1340 } 1341 1342 1343 static int ti_get_serial_info(struct ti_port *tport, 1344 struct serial_struct __user *ret_arg) 1345 { 1346 struct usb_serial_port *port = tport->tp_port; 1347 struct serial_struct ret_serial; 1348 1349 if (!ret_arg) 1350 return -EFAULT; 1351 1352 memset(&ret_serial, 0, sizeof(ret_serial)); 1353 1354 ret_serial.type = PORT_16550A; 1355 ret_serial.line = port->serial->minor; 1356 ret_serial.port = port->number - port->serial->minor; 1357 ret_serial.flags = tport->tp_flags; 1358 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE; 1359 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800; 1360 ret_serial.closing_wait = tport->tp_closing_wait; 1361 1362 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg))) 1363 return -EFAULT; 1364 1365 return 0; 1366 } 1367 1368 1369 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 1370 struct serial_struct __user *new_arg) 1371 { 1372 struct serial_struct new_serial; 1373 1374 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial))) 1375 return -EFAULT; 1376 1377 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS; 1378 tport->tp_closing_wait = new_serial.closing_wait; 1379 1380 return 0; 1381 } 1382 1383 1384 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr) 1385 { 1386 struct async_icount *icount; 1387 struct tty_struct *tty; 1388 unsigned long flags; 1389 1390 dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr); 1391 1392 if (msr & TI_MSR_DELTA_MASK) { 1393 spin_lock_irqsave(&tport->tp_lock, flags); 1394 icount = &tport->tp_icount; 1395 if (msr & TI_MSR_DELTA_CTS) 1396 icount->cts++; 1397 if (msr & TI_MSR_DELTA_DSR) 1398 icount->dsr++; 1399 if (msr & TI_MSR_DELTA_CD) 1400 icount->dcd++; 1401 if (msr & TI_MSR_DELTA_RI) 1402 icount->rng++; 1403 wake_up_interruptible(&tport->tp_msr_wait); 1404 spin_unlock_irqrestore(&tport->tp_lock, flags); 1405 } 1406 1407 tport->tp_msr = msr & TI_MSR_MASK; 1408 1409 /* handle CTS flow control */ 1410 tty = tty_port_tty_get(&tport->tp_port->port); 1411 if (tty && C_CRTSCTS(tty)) { 1412 if (msr & TI_MSR_CTS) { 1413 tty->hw_stopped = 0; 1414 tty_wakeup(tty); 1415 } else { 1416 tty->hw_stopped = 1; 1417 } 1418 } 1419 tty_kref_put(tty); 1420 } 1421 1422 1423 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush) 1424 { 1425 struct ti_device *tdev = tport->tp_tdev; 1426 struct usb_serial_port *port = tport->tp_port; 1427 wait_queue_t wait; 1428 1429 spin_lock_irq(&tport->tp_lock); 1430 1431 /* wait for data to drain from the buffer */ 1432 tdev->td_urb_error = 0; 1433 init_waitqueue_entry(&wait, current); 1434 add_wait_queue(&tport->tp_write_wait, &wait); 1435 for (;;) { 1436 set_current_state(TASK_INTERRUPTIBLE); 1437 if (kfifo_len(&tport->write_fifo) == 0 1438 || timeout == 0 || signal_pending(current) 1439 || tdev->td_urb_error 1440 || port->serial->disconnected) /* disconnect */ 1441 break; 1442 spin_unlock_irq(&tport->tp_lock); 1443 timeout = schedule_timeout(timeout); 1444 spin_lock_irq(&tport->tp_lock); 1445 } 1446 set_current_state(TASK_RUNNING); 1447 remove_wait_queue(&tport->tp_write_wait, &wait); 1448 1449 /* flush any remaining data in the buffer */ 1450 if (flush) 1451 kfifo_reset_out(&tport->write_fifo); 1452 1453 spin_unlock_irq(&tport->tp_lock); 1454 1455 mutex_lock(&port->serial->disc_mutex); 1456 /* wait for data to drain from the device */ 1457 /* wait for empty tx register, plus 20 ms */ 1458 timeout += jiffies; 1459 tport->tp_lsr &= ~TI_LSR_TX_EMPTY; 1460 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 1461 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error 1462 && !port->serial->disconnected) { 1463 if (ti_get_lsr(tport)) 1464 break; 1465 mutex_unlock(&port->serial->disc_mutex); 1466 msleep_interruptible(20); 1467 mutex_lock(&port->serial->disc_mutex); 1468 } 1469 mutex_unlock(&port->serial->disc_mutex); 1470 } 1471 1472 1473 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty) 1474 { 1475 unsigned long flags; 1476 1477 spin_lock_irqsave(&tport->tp_lock, flags); 1478 1479 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1480 tport->tp_read_urb_state = TI_READ_URB_STOPPING; 1481 1482 spin_unlock_irqrestore(&tport->tp_lock, flags); 1483 } 1484 1485 1486 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty) 1487 { 1488 struct urb *urb; 1489 int status = 0; 1490 unsigned long flags; 1491 1492 spin_lock_irqsave(&tport->tp_lock, flags); 1493 1494 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) { 1495 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1496 urb = tport->tp_port->read_urb; 1497 spin_unlock_irqrestore(&tport->tp_lock, flags); 1498 urb->context = tport; 1499 status = usb_submit_urb(urb, GFP_KERNEL); 1500 } else { 1501 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1502 spin_unlock_irqrestore(&tport->tp_lock, flags); 1503 } 1504 1505 return status; 1506 } 1507 1508 1509 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 1510 __u16 moduleid, __u16 value, __u8 *data, int size) 1511 { 1512 int status; 1513 1514 status = usb_control_msg(tdev->td_serial->dev, 1515 usb_sndctrlpipe(tdev->td_serial->dev, 0), command, 1516 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 1517 value, moduleid, data, size, 1000); 1518 1519 if (status == size) 1520 status = 0; 1521 1522 if (status > 0) 1523 status = -ECOMM; 1524 1525 return status; 1526 } 1527 1528 1529 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 1530 __u16 moduleid, __u16 value, __u8 *data, int size) 1531 { 1532 int status; 1533 1534 status = usb_control_msg(tdev->td_serial->dev, 1535 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command, 1536 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 1537 value, moduleid, data, size, 1000); 1538 1539 if (status == size) 1540 status = 0; 1541 1542 if (status > 0) 1543 status = -ECOMM; 1544 1545 return status; 1546 } 1547 1548 1549 static int ti_write_byte(struct usb_serial_port *port, 1550 struct ti_device *tdev, unsigned long addr, 1551 __u8 mask, __u8 byte) 1552 { 1553 int status; 1554 unsigned int size; 1555 struct ti_write_data_bytes *data; 1556 1557 dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__, 1558 addr, mask, byte); 1559 1560 size = sizeof(struct ti_write_data_bytes) + 2; 1561 data = kmalloc(size, GFP_KERNEL); 1562 if (!data) { 1563 dev_err(&port->dev, "%s - out of memory\n", __func__); 1564 return -ENOMEM; 1565 } 1566 1567 data->bAddrType = TI_RW_DATA_ADDR_XDATA; 1568 data->bDataType = TI_RW_DATA_BYTE; 1569 data->bDataCounter = 1; 1570 data->wBaseAddrHi = cpu_to_be16(addr>>16); 1571 data->wBaseAddrLo = cpu_to_be16(addr); 1572 data->bData[0] = mask; 1573 data->bData[1] = byte; 1574 1575 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0, 1576 (__u8 *)data, size); 1577 1578 if (status < 0) 1579 dev_err(&port->dev, "%s - failed, %d\n", __func__, status); 1580 1581 kfree(data); 1582 1583 return status; 1584 } 1585 1586 static int ti_do_download(struct usb_device *dev, int pipe, 1587 u8 *buffer, int size) 1588 { 1589 int pos; 1590 u8 cs = 0; 1591 int done; 1592 struct ti_firmware_header *header; 1593 int status = 0; 1594 int len; 1595 1596 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++) 1597 cs = (__u8)(cs + buffer[pos]); 1598 1599 header = (struct ti_firmware_header *)buffer; 1600 header->wLength = cpu_to_le16((__u16)(size 1601 - sizeof(struct ti_firmware_header))); 1602 header->bCheckSum = cs; 1603 1604 dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__); 1605 for (pos = 0; pos < size; pos += done) { 1606 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE); 1607 status = usb_bulk_msg(dev, pipe, buffer + pos, len, 1608 &done, 1000); 1609 if (status) 1610 break; 1611 } 1612 return status; 1613 } 1614 1615 static int ti_download_firmware(struct ti_device *tdev) 1616 { 1617 int status; 1618 int buffer_size; 1619 __u8 *buffer; 1620 struct usb_device *dev = tdev->td_serial->dev; 1621 unsigned int pipe = usb_sndbulkpipe(dev, 1622 tdev->td_serial->port[0]->bulk_out_endpointAddress); 1623 const struct firmware *fw_p; 1624 char buf[32]; 1625 1626 /* try ID specific firmware first, then try generic firmware */ 1627 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor, 1628 dev->descriptor.idProduct); 1629 status = request_firmware(&fw_p, buf, &dev->dev); 1630 1631 if (status != 0) { 1632 buf[0] = '\0'; 1633 if (dev->descriptor.idVendor == MTS_VENDOR_ID) { 1634 switch (dev->descriptor.idProduct) { 1635 case MTS_CDMA_PRODUCT_ID: 1636 strcpy(buf, "mts_cdma.fw"); 1637 break; 1638 case MTS_GSM_PRODUCT_ID: 1639 strcpy(buf, "mts_gsm.fw"); 1640 break; 1641 case MTS_EDGE_PRODUCT_ID: 1642 strcpy(buf, "mts_edge.fw"); 1643 break; 1644 case MTS_MT9234MU_PRODUCT_ID: 1645 strcpy(buf, "mts_mt9234mu.fw"); 1646 break; 1647 case MTS_MT9234ZBA_PRODUCT_ID: 1648 strcpy(buf, "mts_mt9234zba.fw"); 1649 break; 1650 case MTS_MT9234ZBAOLD_PRODUCT_ID: 1651 strcpy(buf, "mts_mt9234zba.fw"); 1652 break; } 1653 } 1654 if (buf[0] == '\0') { 1655 if (tdev->td_is_3410) 1656 strcpy(buf, "ti_3410.fw"); 1657 else 1658 strcpy(buf, "ti_5052.fw"); 1659 } 1660 status = request_firmware(&fw_p, buf, &dev->dev); 1661 } 1662 if (status) { 1663 dev_err(&dev->dev, "%s - firmware not found\n", __func__); 1664 return -ENOENT; 1665 } 1666 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) { 1667 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size); 1668 release_firmware(fw_p); 1669 return -ENOENT; 1670 } 1671 1672 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header); 1673 buffer = kmalloc(buffer_size, GFP_KERNEL); 1674 if (buffer) { 1675 memcpy(buffer, fw_p->data, fw_p->size); 1676 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size); 1677 status = ti_do_download(dev, pipe, buffer, fw_p->size); 1678 kfree(buffer); 1679 } else { 1680 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__); 1681 status = -ENOMEM; 1682 } 1683 release_firmware(fw_p); 1684 if (status) { 1685 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", 1686 __func__, status); 1687 return status; 1688 } 1689 1690 dev_dbg(&dev->dev, "%s - download successful\n", __func__); 1691 1692 return 0; 1693 } 1694