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/circ_buf.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_VERSION "v0.9" 44 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>" 45 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver" 46 47 #define TI_FIRMWARE_BUF_SIZE 16284 48 49 #define TI_WRITE_BUF_SIZE 1024 50 51 #define TI_TRANSFER_TIMEOUT 2 52 53 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */ 54 55 /* supported setserial flags */ 56 #define TI_SET_SERIAL_FLAGS 0 57 58 /* read urb states */ 59 #define TI_READ_URB_RUNNING 0 60 #define TI_READ_URB_STOPPING 1 61 #define TI_READ_URB_STOPPED 2 62 63 #define TI_EXTRA_VID_PID_COUNT 5 64 65 66 /* Structures */ 67 68 struct ti_port { 69 int tp_is_open; 70 __u8 tp_msr; 71 __u8 tp_lsr; 72 __u8 tp_shadow_mcr; 73 __u8 tp_uart_mode; /* 232 or 485 modes */ 74 unsigned int tp_uart_base_addr; 75 int tp_flags; 76 int tp_closing_wait;/* in .01 secs */ 77 struct async_icount tp_icount; 78 wait_queue_head_t tp_msr_wait; /* wait for msr change */ 79 wait_queue_head_t tp_write_wait; 80 struct ti_device *tp_tdev; 81 struct usb_serial_port *tp_port; 82 spinlock_t tp_lock; 83 int tp_read_urb_state; 84 int tp_write_urb_in_use; 85 struct circ_buf *tp_write_buf; 86 }; 87 88 struct ti_device { 89 struct mutex td_open_close_lock; 90 int td_open_port_count; 91 struct usb_serial *td_serial; 92 int td_is_3410; 93 int td_urb_error; 94 }; 95 96 97 /* Function Declarations */ 98 99 static int ti_startup(struct usb_serial *serial); 100 static void ti_release(struct usb_serial *serial); 101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port); 102 static void ti_close(struct usb_serial_port *port); 103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 104 const unsigned char *data, int count); 105 static int ti_write_room(struct tty_struct *tty); 106 static int ti_chars_in_buffer(struct tty_struct *tty); 107 static void ti_throttle(struct tty_struct *tty); 108 static void ti_unthrottle(struct tty_struct *tty); 109 static int ti_ioctl(struct tty_struct *tty, struct file *file, 110 unsigned int cmd, unsigned long arg); 111 static void ti_set_termios(struct tty_struct *tty, 112 struct usb_serial_port *port, struct ktermios *old_termios); 113 static int ti_tiocmget(struct tty_struct *tty, struct file *file); 114 static int ti_tiocmset(struct tty_struct *tty, struct file *file, 115 unsigned int set, unsigned int clear); 116 static void ti_break(struct tty_struct *tty, int break_state); 117 static void ti_interrupt_callback(struct urb *urb); 118 static void ti_bulk_in_callback(struct urb *urb); 119 static void ti_bulk_out_callback(struct urb *urb); 120 121 static void ti_recv(struct device *dev, struct tty_struct *tty, 122 unsigned char *data, int length); 123 static void ti_send(struct ti_port *tport); 124 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr); 125 static int ti_get_lsr(struct ti_port *tport); 126 static int ti_get_serial_info(struct ti_port *tport, 127 struct serial_struct __user *ret_arg); 128 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 129 struct serial_struct __user *new_arg); 130 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr); 131 132 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush); 133 134 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty); 135 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty); 136 137 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 138 __u16 moduleid, __u16 value, __u8 *data, int size); 139 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 140 __u16 moduleid, __u16 value, __u8 *data, int size); 141 142 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 143 __u8 mask, __u8 byte); 144 145 static int ti_download_firmware(struct ti_device *tdev); 146 147 /* circular buffer */ 148 static struct circ_buf *ti_buf_alloc(void); 149 static void ti_buf_free(struct circ_buf *cb); 150 static void ti_buf_clear(struct circ_buf *cb); 151 static int ti_buf_data_avail(struct circ_buf *cb); 152 static int ti_buf_space_avail(struct circ_buf *cb); 153 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count); 154 static int ti_buf_get(struct circ_buf *cb, char *buf, int count); 155 156 157 /* Data */ 158 159 /* module parameters */ 160 static int debug; 161 static int closing_wait = TI_DEFAULT_CLOSING_WAIT; 162 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT]; 163 static unsigned int vendor_3410_count; 164 static ushort product_3410[TI_EXTRA_VID_PID_COUNT]; 165 static unsigned int product_3410_count; 166 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT]; 167 static unsigned int vendor_5052_count; 168 static ushort product_5052[TI_EXTRA_VID_PID_COUNT]; 169 static unsigned int product_5052_count; 170 171 /* supported devices */ 172 /* the array dimension is the number of default entries plus */ 173 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */ 174 /* null entry */ 175 static struct usb_device_id ti_id_table_3410[10+TI_EXTRA_VID_PID_COUNT+1] = { 176 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 177 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 178 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) }, 179 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) }, 180 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) }, 181 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) }, 182 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) }, 183 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) }, 184 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) }, 185 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) }, 186 }; 187 188 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = { 189 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 190 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 191 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 192 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 193 }; 194 195 static struct usb_device_id ti_id_table_combined[14+2*TI_EXTRA_VID_PID_COUNT+1] = { 196 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 197 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 198 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) }, 199 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) }, 200 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) }, 201 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) }, 202 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) }, 203 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 204 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 205 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 206 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 207 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) }, 208 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) }, 209 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) }, 210 { } 211 }; 212 213 static struct usb_driver ti_usb_driver = { 214 .name = "ti_usb_3410_5052", 215 .probe = usb_serial_probe, 216 .disconnect = usb_serial_disconnect, 217 .id_table = ti_id_table_combined, 218 .no_dynamic_id = 1, 219 }; 220 221 static struct usb_serial_driver ti_1port_device = { 222 .driver = { 223 .owner = THIS_MODULE, 224 .name = "ti_usb_3410_5052_1", 225 }, 226 .description = "TI USB 3410 1 port adapter", 227 .usb_driver = &ti_usb_driver, 228 .id_table = ti_id_table_3410, 229 .num_ports = 1, 230 .attach = ti_startup, 231 .release = ti_release, 232 .open = ti_open, 233 .close = ti_close, 234 .write = ti_write, 235 .write_room = ti_write_room, 236 .chars_in_buffer = ti_chars_in_buffer, 237 .throttle = ti_throttle, 238 .unthrottle = ti_unthrottle, 239 .ioctl = ti_ioctl, 240 .set_termios = ti_set_termios, 241 .tiocmget = ti_tiocmget, 242 .tiocmset = ti_tiocmset, 243 .break_ctl = ti_break, 244 .read_int_callback = ti_interrupt_callback, 245 .read_bulk_callback = ti_bulk_in_callback, 246 .write_bulk_callback = ti_bulk_out_callback, 247 }; 248 249 static struct usb_serial_driver ti_2port_device = { 250 .driver = { 251 .owner = THIS_MODULE, 252 .name = "ti_usb_3410_5052_2", 253 }, 254 .description = "TI USB 5052 2 port adapter", 255 .usb_driver = &ti_usb_driver, 256 .id_table = ti_id_table_5052, 257 .num_ports = 2, 258 .attach = ti_startup, 259 .release = ti_release, 260 .open = ti_open, 261 .close = ti_close, 262 .write = ti_write, 263 .write_room = ti_write_room, 264 .chars_in_buffer = ti_chars_in_buffer, 265 .throttle = ti_throttle, 266 .unthrottle = ti_unthrottle, 267 .ioctl = ti_ioctl, 268 .set_termios = ti_set_termios, 269 .tiocmget = ti_tiocmget, 270 .tiocmset = ti_tiocmset, 271 .break_ctl = ti_break, 272 .read_int_callback = ti_interrupt_callback, 273 .read_bulk_callback = ti_bulk_in_callback, 274 .write_bulk_callback = ti_bulk_out_callback, 275 }; 276 277 278 /* Module */ 279 280 MODULE_AUTHOR(TI_DRIVER_AUTHOR); 281 MODULE_DESCRIPTION(TI_DRIVER_DESC); 282 MODULE_VERSION(TI_DRIVER_VERSION); 283 MODULE_LICENSE("GPL"); 284 285 MODULE_FIRMWARE("ti_3410.fw"); 286 MODULE_FIRMWARE("ti_5052.fw"); 287 MODULE_FIRMWARE("mts_cdma.fw"); 288 MODULE_FIRMWARE("mts_gsm.fw"); 289 MODULE_FIRMWARE("mts_edge.fw"); 290 291 module_param(debug, bool, S_IRUGO | S_IWUSR); 292 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes"); 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 int ret; 320 321 /* insert extra vendor and product ids */ 322 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1; 323 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1; 324 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) { 325 ti_id_table_3410[j].idVendor = vendor_3410[i]; 326 ti_id_table_3410[j].idProduct = product_3410[i]; 327 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 328 ti_id_table_combined[c].idVendor = vendor_3410[i]; 329 ti_id_table_combined[c].idProduct = product_3410[i]; 330 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 331 } 332 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1; 333 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) { 334 ti_id_table_5052[j].idVendor = vendor_5052[i]; 335 ti_id_table_5052[j].idProduct = product_5052[i]; 336 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 337 ti_id_table_combined[c].idVendor = vendor_5052[i]; 338 ti_id_table_combined[c].idProduct = product_5052[i]; 339 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 340 } 341 342 ret = usb_serial_register(&ti_1port_device); 343 if (ret) 344 goto failed_1port; 345 ret = usb_serial_register(&ti_2port_device); 346 if (ret) 347 goto failed_2port; 348 349 ret = usb_register(&ti_usb_driver); 350 if (ret) 351 goto failed_usb; 352 353 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":" 354 TI_DRIVER_DESC "\n"); 355 356 return 0; 357 358 failed_usb: 359 usb_serial_deregister(&ti_2port_device); 360 failed_2port: 361 usb_serial_deregister(&ti_1port_device); 362 failed_1port: 363 return ret; 364 } 365 366 367 static void __exit ti_exit(void) 368 { 369 usb_serial_deregister(&ti_1port_device); 370 usb_serial_deregister(&ti_2port_device); 371 usb_deregister(&ti_usb_driver); 372 } 373 374 375 module_init(ti_init); 376 module_exit(ti_exit); 377 378 379 static int ti_startup(struct usb_serial *serial) 380 { 381 struct ti_device *tdev; 382 struct ti_port *tport; 383 struct usb_device *dev = serial->dev; 384 int status; 385 int i; 386 387 388 dbg("%s - product 0x%4X, num configurations %d, configuration value %d", 389 __func__, le16_to_cpu(dev->descriptor.idProduct), 390 dev->descriptor.bNumConfigurations, 391 dev->actconfig->desc.bConfigurationValue); 392 393 /* create device structure */ 394 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL); 395 if (tdev == NULL) { 396 dev_err(&dev->dev, "%s - out of memory\n", __func__); 397 return -ENOMEM; 398 } 399 mutex_init(&tdev->td_open_close_lock); 400 tdev->td_serial = serial; 401 usb_set_serial_data(serial, tdev); 402 403 /* determine device type */ 404 if (usb_match_id(serial->interface, ti_id_table_3410)) 405 tdev->td_is_3410 = 1; 406 dbg("%s - device type is %s", __func__, 407 tdev->td_is_3410 ? "3410" : "5052"); 408 409 /* if we have only 1 configuration, download firmware */ 410 if (dev->descriptor.bNumConfigurations == 1) { 411 if ((status = ti_download_firmware(tdev)) != 0) 412 goto free_tdev; 413 414 /* 3410 must be reset, 5052 resets itself */ 415 if (tdev->td_is_3410) { 416 msleep_interruptible(100); 417 usb_reset_device(dev); 418 } 419 420 status = -ENODEV; 421 goto free_tdev; 422 } 423 424 /* the second configuration must be set */ 425 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) { 426 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG); 427 status = status ? status : -ENODEV; 428 goto free_tdev; 429 } 430 431 /* set up port structures */ 432 for (i = 0; i < serial->num_ports; ++i) { 433 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL); 434 if (tport == NULL) { 435 dev_err(&dev->dev, "%s - out of memory\n", __func__); 436 status = -ENOMEM; 437 goto free_tports; 438 } 439 spin_lock_init(&tport->tp_lock); 440 tport->tp_uart_base_addr = (i == 0 ? 441 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR); 442 tport->tp_closing_wait = closing_wait; 443 init_waitqueue_head(&tport->tp_msr_wait); 444 init_waitqueue_head(&tport->tp_write_wait); 445 tport->tp_write_buf = ti_buf_alloc(); 446 if (tport->tp_write_buf == NULL) { 447 dev_err(&dev->dev, "%s - out of memory\n", __func__); 448 kfree(tport); 449 status = -ENOMEM; 450 goto free_tports; 451 } 452 tport->tp_port = serial->port[i]; 453 tport->tp_tdev = tdev; 454 usb_set_serial_port_data(serial->port[i], tport); 455 tport->tp_uart_mode = 0; /* default is RS232 */ 456 } 457 458 return 0; 459 460 free_tports: 461 for (--i; i >= 0; --i) { 462 tport = usb_get_serial_port_data(serial->port[i]); 463 ti_buf_free(tport->tp_write_buf); 464 kfree(tport); 465 usb_set_serial_port_data(serial->port[i], NULL); 466 } 467 free_tdev: 468 kfree(tdev); 469 usb_set_serial_data(serial, NULL); 470 return status; 471 } 472 473 474 static void ti_release(struct usb_serial *serial) 475 { 476 int i; 477 struct ti_device *tdev = usb_get_serial_data(serial); 478 struct ti_port *tport; 479 480 dbg("%s", __func__); 481 482 for (i = 0; i < serial->num_ports; ++i) { 483 tport = usb_get_serial_port_data(serial->port[i]); 484 if (tport) { 485 ti_buf_free(tport->tp_write_buf); 486 kfree(tport); 487 } 488 } 489 490 kfree(tdev); 491 } 492 493 494 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port) 495 { 496 struct ti_port *tport = usb_get_serial_port_data(port); 497 struct ti_device *tdev; 498 struct usb_device *dev; 499 struct urb *urb; 500 int port_number; 501 int status; 502 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 503 TI_PIPE_TIMEOUT_ENABLE | 504 (TI_TRANSFER_TIMEOUT << 2)); 505 506 dbg("%s - port %d", __func__, port->number); 507 508 if (tport == NULL) 509 return -ENODEV; 510 511 dev = port->serial->dev; 512 tdev = tport->tp_tdev; 513 514 /* only one open on any port on a device at a time */ 515 if (mutex_lock_interruptible(&tdev->td_open_close_lock)) 516 return -ERESTARTSYS; 517 518 port_number = port->number - port->serial->minor; 519 520 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount)); 521 522 tport->tp_msr = 0; 523 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR); 524 525 /* start interrupt urb the first time a port is opened on this device */ 526 if (tdev->td_open_port_count == 0) { 527 dbg("%s - start interrupt in urb", __func__); 528 urb = tdev->td_serial->port[0]->interrupt_in_urb; 529 if (!urb) { 530 dev_err(&port->dev, "%s - no interrupt urb\n", 531 __func__); 532 status = -EINVAL; 533 goto release_lock; 534 } 535 urb->complete = ti_interrupt_callback; 536 urb->context = tdev; 537 urb->dev = dev; 538 status = usb_submit_urb(urb, GFP_KERNEL); 539 if (status) { 540 dev_err(&port->dev, 541 "%s - submit interrupt urb failed, %d\n", 542 __func__, status); 543 goto release_lock; 544 } 545 } 546 547 if (tty) 548 ti_set_termios(tty, port, tty->termios); 549 550 dbg("%s - sending TI_OPEN_PORT", __func__); 551 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 552 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 553 if (status) { 554 dev_err(&port->dev, "%s - cannot send open command, %d\n", 555 __func__, status); 556 goto unlink_int_urb; 557 } 558 559 dbg("%s - sending TI_START_PORT", __func__); 560 status = ti_command_out_sync(tdev, TI_START_PORT, 561 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 562 if (status) { 563 dev_err(&port->dev, "%s - cannot send start command, %d\n", 564 __func__, status); 565 goto unlink_int_urb; 566 } 567 568 dbg("%s - sending TI_PURGE_PORT", __func__); 569 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 570 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0); 571 if (status) { 572 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", 573 __func__, status); 574 goto unlink_int_urb; 575 } 576 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 577 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0); 578 if (status) { 579 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", 580 __func__, status); 581 goto unlink_int_urb; 582 } 583 584 /* reset the data toggle on the bulk endpoints to work around bug in 585 * host controllers where things get out of sync some times */ 586 usb_clear_halt(dev, port->write_urb->pipe); 587 usb_clear_halt(dev, port->read_urb->pipe); 588 589 if (tty) 590 ti_set_termios(tty, port, tty->termios); 591 592 dbg("%s - sending TI_OPEN_PORT (2)", __func__); 593 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 594 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 595 if (status) { 596 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", 597 __func__, status); 598 goto unlink_int_urb; 599 } 600 601 dbg("%s - sending TI_START_PORT (2)", __func__); 602 status = ti_command_out_sync(tdev, TI_START_PORT, 603 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 604 if (status) { 605 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", 606 __func__, status); 607 goto unlink_int_urb; 608 } 609 610 /* start read urb */ 611 dbg("%s - start read urb", __func__); 612 urb = port->read_urb; 613 if (!urb) { 614 dev_err(&port->dev, "%s - no read urb\n", __func__); 615 status = -EINVAL; 616 goto unlink_int_urb; 617 } 618 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 619 urb->complete = ti_bulk_in_callback; 620 urb->context = tport; 621 urb->dev = dev; 622 status = usb_submit_urb(urb, GFP_KERNEL); 623 if (status) { 624 dev_err(&port->dev, "%s - submit read urb failed, %d\n", 625 __func__, status); 626 goto unlink_int_urb; 627 } 628 629 tport->tp_is_open = 1; 630 ++tdev->td_open_port_count; 631 632 goto release_lock; 633 634 unlink_int_urb: 635 if (tdev->td_open_port_count == 0) 636 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 637 release_lock: 638 mutex_unlock(&tdev->td_open_close_lock); 639 dbg("%s - exit %d", __func__, status); 640 return status; 641 } 642 643 644 static void ti_close(struct usb_serial_port *port) 645 { 646 struct ti_device *tdev; 647 struct ti_port *tport; 648 int port_number; 649 int status; 650 int do_unlock; 651 652 dbg("%s - port %d", __func__, port->number); 653 654 tdev = usb_get_serial_data(port->serial); 655 tport = usb_get_serial_port_data(port); 656 if (tdev == NULL || tport == NULL) 657 return; 658 659 tport->tp_is_open = 0; 660 661 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1); 662 663 usb_kill_urb(port->read_urb); 664 usb_kill_urb(port->write_urb); 665 tport->tp_write_urb_in_use = 0; 666 667 port_number = port->number - port->serial->minor; 668 669 dbg("%s - sending TI_CLOSE_PORT", __func__); 670 status = ti_command_out_sync(tdev, TI_CLOSE_PORT, 671 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 672 if (status) 673 dev_err(&port->dev, 674 "%s - cannot send close port command, %d\n" 675 , __func__, status); 676 677 /* if mutex_lock is interrupted, continue anyway */ 678 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock); 679 --tport->tp_tdev->td_open_port_count; 680 if (tport->tp_tdev->td_open_port_count <= 0) { 681 /* last port is closed, shut down interrupt urb */ 682 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 683 tport->tp_tdev->td_open_port_count = 0; 684 } 685 if (do_unlock) 686 mutex_unlock(&tdev->td_open_close_lock); 687 688 dbg("%s - exit", __func__); 689 } 690 691 692 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 693 const unsigned char *data, int count) 694 { 695 struct ti_port *tport = usb_get_serial_port_data(port); 696 unsigned long flags; 697 698 dbg("%s - port %d", __func__, port->number); 699 700 if (count == 0) { 701 dbg("%s - write request of 0 bytes", __func__); 702 return 0; 703 } 704 705 if (tport == NULL || !tport->tp_is_open) 706 return -ENODEV; 707 708 spin_lock_irqsave(&tport->tp_lock, flags); 709 count = ti_buf_put(tport->tp_write_buf, data, count); 710 spin_unlock_irqrestore(&tport->tp_lock, flags); 711 712 ti_send(tport); 713 714 return count; 715 } 716 717 718 static int ti_write_room(struct tty_struct *tty) 719 { 720 struct usb_serial_port *port = tty->driver_data; 721 struct ti_port *tport = usb_get_serial_port_data(port); 722 int room = 0; 723 unsigned long flags; 724 725 dbg("%s - port %d", __func__, port->number); 726 727 if (tport == NULL) 728 return 0; 729 730 spin_lock_irqsave(&tport->tp_lock, flags); 731 room = ti_buf_space_avail(tport->tp_write_buf); 732 spin_unlock_irqrestore(&tport->tp_lock, flags); 733 734 dbg("%s - returns %d", __func__, room); 735 return room; 736 } 737 738 739 static int ti_chars_in_buffer(struct tty_struct *tty) 740 { 741 struct usb_serial_port *port = tty->driver_data; 742 struct ti_port *tport = usb_get_serial_port_data(port); 743 int chars = 0; 744 unsigned long flags; 745 746 dbg("%s - port %d", __func__, port->number); 747 748 if (tport == NULL) 749 return 0; 750 751 spin_lock_irqsave(&tport->tp_lock, flags); 752 chars = ti_buf_data_avail(tport->tp_write_buf); 753 spin_unlock_irqrestore(&tport->tp_lock, flags); 754 755 dbg("%s - returns %d", __func__, chars); 756 return chars; 757 } 758 759 760 static void ti_throttle(struct tty_struct *tty) 761 { 762 struct usb_serial_port *port = tty->driver_data; 763 struct ti_port *tport = usb_get_serial_port_data(port); 764 765 dbg("%s - port %d", __func__, port->number); 766 767 if (tport == NULL) 768 return; 769 770 if (I_IXOFF(tty) || C_CRTSCTS(tty)) 771 ti_stop_read(tport, tty); 772 773 } 774 775 776 static void ti_unthrottle(struct tty_struct *tty) 777 { 778 struct usb_serial_port *port = tty->driver_data; 779 struct ti_port *tport = usb_get_serial_port_data(port); 780 int status; 781 782 dbg("%s - port %d", __func__, port->number); 783 784 if (tport == NULL) 785 return; 786 787 if (I_IXOFF(tty) || C_CRTSCTS(tty)) { 788 status = ti_restart_read(tport, tty); 789 if (status) 790 dev_err(&port->dev, "%s - cannot restart read, %d\n", 791 __func__, status); 792 } 793 } 794 795 796 static int ti_ioctl(struct tty_struct *tty, struct file *file, 797 unsigned int cmd, unsigned long arg) 798 { 799 struct usb_serial_port *port = tty->driver_data; 800 struct ti_port *tport = usb_get_serial_port_data(port); 801 struct async_icount cnow; 802 struct async_icount cprev; 803 804 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd); 805 806 if (tport == NULL) 807 return -ENODEV; 808 809 switch (cmd) { 810 case TIOCGSERIAL: 811 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number); 812 return ti_get_serial_info(tport, 813 (struct serial_struct __user *)arg); 814 case TIOCSSERIAL: 815 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number); 816 return ti_set_serial_info(tty, tport, 817 (struct serial_struct __user *)arg); 818 case TIOCMIWAIT: 819 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number); 820 cprev = tport->tp_icount; 821 while (1) { 822 interruptible_sleep_on(&tport->tp_msr_wait); 823 if (signal_pending(current)) 824 return -ERESTARTSYS; 825 cnow = tport->tp_icount; 826 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 827 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 828 return -EIO; /* no change => error */ 829 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 830 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 831 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 832 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) 833 return 0; 834 cprev = cnow; 835 } 836 break; 837 case TIOCGICOUNT: 838 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", 839 __func__, port->number, 840 tport->tp_icount.rx, tport->tp_icount.tx); 841 if (copy_to_user((void __user *)arg, &tport->tp_icount, 842 sizeof(tport->tp_icount))) 843 return -EFAULT; 844 return 0; 845 } 846 return -ENOIOCTLCMD; 847 } 848 849 850 static void ti_set_termios(struct tty_struct *tty, 851 struct usb_serial_port *port, struct ktermios *old_termios) 852 { 853 struct ti_port *tport = usb_get_serial_port_data(port); 854 struct ti_uart_config *config; 855 tcflag_t cflag, iflag; 856 int baud; 857 int status; 858 int port_number = port->number - port->serial->minor; 859 unsigned int mcr; 860 861 dbg("%s - port %d", __func__, port->number); 862 863 cflag = tty->termios->c_cflag; 864 iflag = tty->termios->c_iflag; 865 866 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag); 867 dbg("%s - old clfag %08x, old iflag %08x", __func__, 868 old_termios->c_cflag, old_termios->c_iflag); 869 870 if (tport == NULL) 871 return; 872 873 config = kmalloc(sizeof(*config), GFP_KERNEL); 874 if (!config) { 875 dev_err(&port->dev, "%s - out of memory\n", __func__); 876 return; 877 } 878 879 config->wFlags = 0; 880 881 /* these flags must be set */ 882 config->wFlags |= TI_UART_ENABLE_MS_INTS; 883 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA; 884 config->bUartMode = (__u8)(tport->tp_uart_mode); 885 886 switch (cflag & CSIZE) { 887 case CS5: 888 config->bDataBits = TI_UART_5_DATA_BITS; 889 break; 890 case CS6: 891 config->bDataBits = TI_UART_6_DATA_BITS; 892 break; 893 case CS7: 894 config->bDataBits = TI_UART_7_DATA_BITS; 895 break; 896 default: 897 case CS8: 898 config->bDataBits = TI_UART_8_DATA_BITS; 899 break; 900 } 901 902 /* CMSPAR isn't supported by this driver */ 903 tty->termios->c_cflag &= ~CMSPAR; 904 905 if (cflag & PARENB) { 906 if (cflag & PARODD) { 907 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 908 config->bParity = TI_UART_ODD_PARITY; 909 } else { 910 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 911 config->bParity = TI_UART_EVEN_PARITY; 912 } 913 } else { 914 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING; 915 config->bParity = TI_UART_NO_PARITY; 916 } 917 918 if (cflag & CSTOPB) 919 config->bStopBits = TI_UART_2_STOP_BITS; 920 else 921 config->bStopBits = TI_UART_1_STOP_BITS; 922 923 if (cflag & CRTSCTS) { 924 /* RTS flow control must be off to drop RTS for baud rate B0 */ 925 if ((cflag & CBAUD) != B0) 926 config->wFlags |= TI_UART_ENABLE_RTS_IN; 927 config->wFlags |= TI_UART_ENABLE_CTS_OUT; 928 } else { 929 tty->hw_stopped = 0; 930 ti_restart_read(tport, tty); 931 } 932 933 if (I_IXOFF(tty) || I_IXON(tty)) { 934 config->cXon = START_CHAR(tty); 935 config->cXoff = STOP_CHAR(tty); 936 937 if (I_IXOFF(tty)) 938 config->wFlags |= TI_UART_ENABLE_X_IN; 939 else 940 ti_restart_read(tport, tty); 941 942 if (I_IXON(tty)) 943 config->wFlags |= TI_UART_ENABLE_X_OUT; 944 } 945 946 baud = tty_get_baud_rate(tty); 947 if (!baud) 948 baud = 9600; 949 if (tport->tp_tdev->td_is_3410) 950 config->wBaudRate = (__u16)((923077 + baud/2) / baud); 951 else 952 config->wBaudRate = (__u16)((461538 + baud/2) / baud); 953 954 /* FIXME: Should calculate resulting baud here and report it back */ 955 if ((cflag & CBAUD) != B0) 956 tty_encode_baud_rate(tty, baud, baud); 957 958 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d", 959 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode); 960 961 cpu_to_be16s(&config->wBaudRate); 962 cpu_to_be16s(&config->wFlags); 963 964 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG, 965 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config, 966 sizeof(*config)); 967 if (status) 968 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", 969 __func__, port_number, status); 970 971 /* SET_CONFIG asserts RTS and DTR, reset them correctly */ 972 mcr = tport->tp_shadow_mcr; 973 /* if baud rate is B0, clear RTS and DTR */ 974 if ((cflag & CBAUD) == B0) 975 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS); 976 status = ti_set_mcr(tport, mcr); 977 if (status) 978 dev_err(&port->dev, 979 "%s - cannot set modem control on port %d, %d\n", 980 __func__, port_number, status); 981 982 kfree(config); 983 } 984 985 986 static int ti_tiocmget(struct tty_struct *tty, struct file *file) 987 { 988 struct usb_serial_port *port = tty->driver_data; 989 struct ti_port *tport = usb_get_serial_port_data(port); 990 unsigned int result; 991 unsigned int msr; 992 unsigned int mcr; 993 unsigned long flags; 994 995 dbg("%s - port %d", __func__, port->number); 996 997 if (tport == NULL) 998 return -ENODEV; 999 1000 spin_lock_irqsave(&tport->tp_lock, flags); 1001 msr = tport->tp_msr; 1002 mcr = tport->tp_shadow_mcr; 1003 spin_unlock_irqrestore(&tport->tp_lock, flags); 1004 1005 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0) 1006 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0) 1007 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0) 1008 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0) 1009 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0) 1010 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0) 1011 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0); 1012 1013 dbg("%s - 0x%04X", __func__, result); 1014 1015 return result; 1016 } 1017 1018 1019 static int ti_tiocmset(struct tty_struct *tty, struct file *file, 1020 unsigned int set, unsigned int clear) 1021 { 1022 struct usb_serial_port *port = tty->driver_data; 1023 struct ti_port *tport = usb_get_serial_port_data(port); 1024 unsigned int mcr; 1025 unsigned long flags; 1026 1027 dbg("%s - port %d", __func__, port->number); 1028 1029 if (tport == NULL) 1030 return -ENODEV; 1031 1032 spin_lock_irqsave(&tport->tp_lock, flags); 1033 mcr = tport->tp_shadow_mcr; 1034 1035 if (set & TIOCM_RTS) 1036 mcr |= TI_MCR_RTS; 1037 if (set & TIOCM_DTR) 1038 mcr |= TI_MCR_DTR; 1039 if (set & TIOCM_LOOP) 1040 mcr |= TI_MCR_LOOP; 1041 1042 if (clear & TIOCM_RTS) 1043 mcr &= ~TI_MCR_RTS; 1044 if (clear & TIOCM_DTR) 1045 mcr &= ~TI_MCR_DTR; 1046 if (clear & TIOCM_LOOP) 1047 mcr &= ~TI_MCR_LOOP; 1048 spin_unlock_irqrestore(&tport->tp_lock, flags); 1049 1050 return ti_set_mcr(tport, mcr); 1051 } 1052 1053 1054 static void ti_break(struct tty_struct *tty, int break_state) 1055 { 1056 struct usb_serial_port *port = tty->driver_data; 1057 struct ti_port *tport = usb_get_serial_port_data(port); 1058 int status; 1059 1060 dbg("%s - state = %d", __func__, break_state); 1061 1062 if (tport == NULL) 1063 return; 1064 1065 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0); 1066 1067 status = ti_write_byte(tport->tp_tdev, 1068 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR, 1069 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0); 1070 1071 if (status) 1072 dbg("%s - error setting break, %d", __func__, status); 1073 } 1074 1075 1076 static void ti_interrupt_callback(struct urb *urb) 1077 { 1078 struct ti_device *tdev = urb->context; 1079 struct usb_serial_port *port; 1080 struct usb_serial *serial = tdev->td_serial; 1081 struct ti_port *tport; 1082 struct device *dev = &urb->dev->dev; 1083 unsigned char *data = urb->transfer_buffer; 1084 int length = urb->actual_length; 1085 int port_number; 1086 int function; 1087 int status = urb->status; 1088 int retval; 1089 __u8 msr; 1090 1091 dbg("%s", __func__); 1092 1093 switch (status) { 1094 case 0: 1095 break; 1096 case -ECONNRESET: 1097 case -ENOENT: 1098 case -ESHUTDOWN: 1099 dbg("%s - urb shutting down, %d", __func__, status); 1100 tdev->td_urb_error = 1; 1101 return; 1102 default: 1103 dev_err(dev, "%s - nonzero urb status, %d\n", 1104 __func__, status); 1105 tdev->td_urb_error = 1; 1106 goto exit; 1107 } 1108 1109 if (length != 2) { 1110 dbg("%s - bad packet size, %d", __func__, length); 1111 goto exit; 1112 } 1113 1114 if (data[0] == TI_CODE_HARDWARE_ERROR) { 1115 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]); 1116 goto exit; 1117 } 1118 1119 port_number = TI_GET_PORT_FROM_CODE(data[0]); 1120 function = TI_GET_FUNC_FROM_CODE(data[0]); 1121 1122 dbg("%s - port_number %d, function %d, data 0x%02X", 1123 __func__, port_number, function, data[1]); 1124 1125 if (port_number >= serial->num_ports) { 1126 dev_err(dev, "%s - bad port number, %d\n", 1127 __func__, port_number); 1128 goto exit; 1129 } 1130 1131 port = serial->port[port_number]; 1132 1133 tport = usb_get_serial_port_data(port); 1134 if (!tport) 1135 goto exit; 1136 1137 switch (function) { 1138 case TI_CODE_DATA_ERROR: 1139 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", 1140 __func__, port_number, data[1]); 1141 break; 1142 1143 case TI_CODE_MODEM_STATUS: 1144 msr = data[1]; 1145 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr); 1146 ti_handle_new_msr(tport, msr); 1147 break; 1148 1149 default: 1150 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", 1151 __func__, data[1]); 1152 break; 1153 } 1154 1155 exit: 1156 retval = usb_submit_urb(urb, GFP_ATOMIC); 1157 if (retval) 1158 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", 1159 __func__, retval); 1160 } 1161 1162 1163 static void ti_bulk_in_callback(struct urb *urb) 1164 { 1165 struct ti_port *tport = urb->context; 1166 struct usb_serial_port *port = tport->tp_port; 1167 struct device *dev = &urb->dev->dev; 1168 int status = urb->status; 1169 int retval = 0; 1170 struct tty_struct *tty; 1171 1172 dbg("%s", __func__); 1173 1174 switch (status) { 1175 case 0: 1176 break; 1177 case -ECONNRESET: 1178 case -ENOENT: 1179 case -ESHUTDOWN: 1180 dbg("%s - urb shutting down, %d", __func__, status); 1181 tport->tp_tdev->td_urb_error = 1; 1182 wake_up_interruptible(&tport->tp_write_wait); 1183 return; 1184 default: 1185 dev_err(dev, "%s - nonzero urb status, %d\n", 1186 __func__, status); 1187 tport->tp_tdev->td_urb_error = 1; 1188 wake_up_interruptible(&tport->tp_write_wait); 1189 } 1190 1191 if (status == -EPIPE) 1192 goto exit; 1193 1194 if (status) { 1195 dev_err(dev, "%s - stopping read!\n", __func__); 1196 return; 1197 } 1198 1199 tty = tty_port_tty_get(&port->port); 1200 if (tty) { 1201 if (urb->actual_length) { 1202 usb_serial_debug_data(debug, dev, __func__, 1203 urb->actual_length, urb->transfer_buffer); 1204 1205 if (!tport->tp_is_open) 1206 dbg("%s - port closed, dropping data", 1207 __func__); 1208 else 1209 ti_recv(&urb->dev->dev, tty, 1210 urb->transfer_buffer, 1211 urb->actual_length); 1212 spin_lock(&tport->tp_lock); 1213 tport->tp_icount.rx += urb->actual_length; 1214 spin_unlock(&tport->tp_lock); 1215 } 1216 tty_kref_put(tty); 1217 } 1218 1219 exit: 1220 /* continue to read unless stopping */ 1221 spin_lock(&tport->tp_lock); 1222 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) { 1223 urb->dev = port->serial->dev; 1224 retval = usb_submit_urb(urb, GFP_ATOMIC); 1225 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) { 1226 tport->tp_read_urb_state = TI_READ_URB_STOPPED; 1227 } 1228 spin_unlock(&tport->tp_lock); 1229 if (retval) 1230 dev_err(dev, "%s - resubmit read urb failed, %d\n", 1231 __func__, retval); 1232 } 1233 1234 1235 static void ti_bulk_out_callback(struct urb *urb) 1236 { 1237 struct ti_port *tport = urb->context; 1238 struct usb_serial_port *port = tport->tp_port; 1239 struct device *dev = &urb->dev->dev; 1240 int status = urb->status; 1241 1242 dbg("%s - port %d", __func__, port->number); 1243 1244 tport->tp_write_urb_in_use = 0; 1245 1246 switch (status) { 1247 case 0: 1248 break; 1249 case -ECONNRESET: 1250 case -ENOENT: 1251 case -ESHUTDOWN: 1252 dbg("%s - urb shutting down, %d", __func__, status); 1253 tport->tp_tdev->td_urb_error = 1; 1254 wake_up_interruptible(&tport->tp_write_wait); 1255 return; 1256 default: 1257 dev_err(dev, "%s - nonzero urb status, %d\n", 1258 __func__, status); 1259 tport->tp_tdev->td_urb_error = 1; 1260 wake_up_interruptible(&tport->tp_write_wait); 1261 } 1262 1263 /* send any buffered data */ 1264 ti_send(tport); 1265 } 1266 1267 1268 static void ti_recv(struct device *dev, struct tty_struct *tty, 1269 unsigned char *data, int length) 1270 { 1271 int cnt; 1272 1273 do { 1274 cnt = tty_buffer_request_room(tty, length); 1275 if (cnt < length) { 1276 dev_err(dev, "%s - dropping data, %d bytes lost\n", 1277 __func__, length - cnt); 1278 if (cnt == 0) 1279 break; 1280 } 1281 tty_insert_flip_string(tty, data, cnt); 1282 tty_flip_buffer_push(tty); 1283 data += cnt; 1284 length -= cnt; 1285 } while (length > 0); 1286 1287 } 1288 1289 1290 static void ti_send(struct ti_port *tport) 1291 { 1292 int count, result; 1293 struct usb_serial_port *port = tport->tp_port; 1294 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */ 1295 unsigned long flags; 1296 1297 1298 dbg("%s - port %d", __func__, port->number); 1299 1300 spin_lock_irqsave(&tport->tp_lock, flags); 1301 1302 if (tport->tp_write_urb_in_use) 1303 goto unlock; 1304 1305 count = ti_buf_get(tport->tp_write_buf, 1306 port->write_urb->transfer_buffer, 1307 port->bulk_out_size); 1308 1309 if (count == 0) 1310 goto unlock; 1311 1312 tport->tp_write_urb_in_use = 1; 1313 1314 spin_unlock_irqrestore(&tport->tp_lock, flags); 1315 1316 usb_serial_debug_data(debug, &port->dev, __func__, count, 1317 port->write_urb->transfer_buffer); 1318 1319 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 1320 usb_sndbulkpipe(port->serial->dev, 1321 port->bulk_out_endpointAddress), 1322 port->write_urb->transfer_buffer, count, 1323 ti_bulk_out_callback, tport); 1324 1325 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 1326 if (result) { 1327 dev_err(&port->dev, "%s - submit write urb failed, %d\n", 1328 __func__, result); 1329 tport->tp_write_urb_in_use = 0; 1330 /* TODO: reschedule ti_send */ 1331 } else { 1332 spin_lock_irqsave(&tport->tp_lock, flags); 1333 tport->tp_icount.tx += count; 1334 spin_unlock_irqrestore(&tport->tp_lock, flags); 1335 } 1336 1337 /* more room in the buffer for new writes, wakeup */ 1338 if (tty) 1339 tty_wakeup(tty); 1340 tty_kref_put(tty); 1341 wake_up_interruptible(&tport->tp_write_wait); 1342 return; 1343 unlock: 1344 spin_unlock_irqrestore(&tport->tp_lock, flags); 1345 tty_kref_put(tty); 1346 return; 1347 } 1348 1349 1350 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr) 1351 { 1352 unsigned long flags; 1353 int status; 1354 1355 status = ti_write_byte(tport->tp_tdev, 1356 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR, 1357 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr); 1358 1359 spin_lock_irqsave(&tport->tp_lock, flags); 1360 if (!status) 1361 tport->tp_shadow_mcr = mcr; 1362 spin_unlock_irqrestore(&tport->tp_lock, flags); 1363 1364 return status; 1365 } 1366 1367 1368 static int ti_get_lsr(struct ti_port *tport) 1369 { 1370 int size, status; 1371 struct ti_device *tdev = tport->tp_tdev; 1372 struct usb_serial_port *port = tport->tp_port; 1373 int port_number = port->number - port->serial->minor; 1374 struct ti_port_status *data; 1375 1376 dbg("%s - port %d", __func__, port->number); 1377 1378 size = sizeof(struct ti_port_status); 1379 data = kmalloc(size, GFP_KERNEL); 1380 if (!data) { 1381 dev_err(&port->dev, "%s - out of memory\n", __func__); 1382 return -ENOMEM; 1383 } 1384 1385 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS, 1386 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size); 1387 if (status) { 1388 dev_err(&port->dev, 1389 "%s - get port status command failed, %d\n", 1390 __func__, status); 1391 goto free_data; 1392 } 1393 1394 dbg("%s - lsr 0x%02X", __func__, data->bLSR); 1395 1396 tport->tp_lsr = data->bLSR; 1397 1398 free_data: 1399 kfree(data); 1400 return status; 1401 } 1402 1403 1404 static int ti_get_serial_info(struct ti_port *tport, 1405 struct serial_struct __user *ret_arg) 1406 { 1407 struct usb_serial_port *port = tport->tp_port; 1408 struct serial_struct ret_serial; 1409 1410 if (!ret_arg) 1411 return -EFAULT; 1412 1413 memset(&ret_serial, 0, sizeof(ret_serial)); 1414 1415 ret_serial.type = PORT_16550A; 1416 ret_serial.line = port->serial->minor; 1417 ret_serial.port = port->number - port->serial->minor; 1418 ret_serial.flags = tport->tp_flags; 1419 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE; 1420 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800; 1421 ret_serial.closing_wait = tport->tp_closing_wait; 1422 1423 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg))) 1424 return -EFAULT; 1425 1426 return 0; 1427 } 1428 1429 1430 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 1431 struct serial_struct __user *new_arg) 1432 { 1433 struct serial_struct new_serial; 1434 1435 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial))) 1436 return -EFAULT; 1437 1438 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS; 1439 tport->tp_closing_wait = new_serial.closing_wait; 1440 1441 return 0; 1442 } 1443 1444 1445 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr) 1446 { 1447 struct async_icount *icount; 1448 struct tty_struct *tty; 1449 unsigned long flags; 1450 1451 dbg("%s - msr 0x%02X", __func__, msr); 1452 1453 if (msr & TI_MSR_DELTA_MASK) { 1454 spin_lock_irqsave(&tport->tp_lock, flags); 1455 icount = &tport->tp_icount; 1456 if (msr & TI_MSR_DELTA_CTS) 1457 icount->cts++; 1458 if (msr & TI_MSR_DELTA_DSR) 1459 icount->dsr++; 1460 if (msr & TI_MSR_DELTA_CD) 1461 icount->dcd++; 1462 if (msr & TI_MSR_DELTA_RI) 1463 icount->rng++; 1464 wake_up_interruptible(&tport->tp_msr_wait); 1465 spin_unlock_irqrestore(&tport->tp_lock, flags); 1466 } 1467 1468 tport->tp_msr = msr & TI_MSR_MASK; 1469 1470 /* handle CTS flow control */ 1471 tty = tty_port_tty_get(&tport->tp_port->port); 1472 if (tty && C_CRTSCTS(tty)) { 1473 if (msr & TI_MSR_CTS) { 1474 tty->hw_stopped = 0; 1475 tty_wakeup(tty); 1476 } else { 1477 tty->hw_stopped = 1; 1478 } 1479 } 1480 tty_kref_put(tty); 1481 } 1482 1483 1484 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush) 1485 { 1486 struct ti_device *tdev = tport->tp_tdev; 1487 struct usb_serial_port *port = tport->tp_port; 1488 wait_queue_t wait; 1489 1490 dbg("%s - port %d", __func__, port->number); 1491 1492 spin_lock_irq(&tport->tp_lock); 1493 1494 /* wait for data to drain from the buffer */ 1495 tdev->td_urb_error = 0; 1496 init_waitqueue_entry(&wait, current); 1497 add_wait_queue(&tport->tp_write_wait, &wait); 1498 for (;;) { 1499 set_current_state(TASK_INTERRUPTIBLE); 1500 if (ti_buf_data_avail(tport->tp_write_buf) == 0 1501 || timeout == 0 || signal_pending(current) 1502 || tdev->td_urb_error 1503 || port->serial->disconnected) /* disconnect */ 1504 break; 1505 spin_unlock_irq(&tport->tp_lock); 1506 timeout = schedule_timeout(timeout); 1507 spin_lock_irq(&tport->tp_lock); 1508 } 1509 set_current_state(TASK_RUNNING); 1510 remove_wait_queue(&tport->tp_write_wait, &wait); 1511 1512 /* flush any remaining data in the buffer */ 1513 if (flush) 1514 ti_buf_clear(tport->tp_write_buf); 1515 1516 spin_unlock_irq(&tport->tp_lock); 1517 1518 mutex_lock(&port->serial->disc_mutex); 1519 /* wait for data to drain from the device */ 1520 /* wait for empty tx register, plus 20 ms */ 1521 timeout += jiffies; 1522 tport->tp_lsr &= ~TI_LSR_TX_EMPTY; 1523 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 1524 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error 1525 && !port->serial->disconnected) { 1526 if (ti_get_lsr(tport)) 1527 break; 1528 mutex_unlock(&port->serial->disc_mutex); 1529 msleep_interruptible(20); 1530 mutex_lock(&port->serial->disc_mutex); 1531 } 1532 mutex_unlock(&port->serial->disc_mutex); 1533 } 1534 1535 1536 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty) 1537 { 1538 unsigned long flags; 1539 1540 spin_lock_irqsave(&tport->tp_lock, flags); 1541 1542 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1543 tport->tp_read_urb_state = TI_READ_URB_STOPPING; 1544 1545 spin_unlock_irqrestore(&tport->tp_lock, flags); 1546 } 1547 1548 1549 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty) 1550 { 1551 struct urb *urb; 1552 int status = 0; 1553 unsigned long flags; 1554 1555 spin_lock_irqsave(&tport->tp_lock, flags); 1556 1557 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) { 1558 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1559 urb = tport->tp_port->read_urb; 1560 spin_unlock_irqrestore(&tport->tp_lock, flags); 1561 urb->complete = ti_bulk_in_callback; 1562 urb->context = tport; 1563 urb->dev = tport->tp_port->serial->dev; 1564 status = usb_submit_urb(urb, GFP_KERNEL); 1565 } else { 1566 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1567 spin_unlock_irqrestore(&tport->tp_lock, flags); 1568 } 1569 1570 return status; 1571 } 1572 1573 1574 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 1575 __u16 moduleid, __u16 value, __u8 *data, int size) 1576 { 1577 int status; 1578 1579 status = usb_control_msg(tdev->td_serial->dev, 1580 usb_sndctrlpipe(tdev->td_serial->dev, 0), command, 1581 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 1582 value, moduleid, data, size, 1000); 1583 1584 if (status == size) 1585 status = 0; 1586 1587 if (status > 0) 1588 status = -ECOMM; 1589 1590 return status; 1591 } 1592 1593 1594 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 1595 __u16 moduleid, __u16 value, __u8 *data, int size) 1596 { 1597 int status; 1598 1599 status = usb_control_msg(tdev->td_serial->dev, 1600 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command, 1601 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 1602 value, moduleid, data, size, 1000); 1603 1604 if (status == size) 1605 status = 0; 1606 1607 if (status > 0) 1608 status = -ECOMM; 1609 1610 return status; 1611 } 1612 1613 1614 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 1615 __u8 mask, __u8 byte) 1616 { 1617 int status; 1618 unsigned int size; 1619 struct ti_write_data_bytes *data; 1620 struct device *dev = &tdev->td_serial->dev->dev; 1621 1622 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", 1623 __func__, addr, mask, byte); 1624 1625 size = sizeof(struct ti_write_data_bytes) + 2; 1626 data = kmalloc(size, GFP_KERNEL); 1627 if (!data) { 1628 dev_err(dev, "%s - out of memory\n", __func__); 1629 return -ENOMEM; 1630 } 1631 1632 data->bAddrType = TI_RW_DATA_ADDR_XDATA; 1633 data->bDataType = TI_RW_DATA_BYTE; 1634 data->bDataCounter = 1; 1635 data->wBaseAddrHi = cpu_to_be16(addr>>16); 1636 data->wBaseAddrLo = cpu_to_be16(addr); 1637 data->bData[0] = mask; 1638 data->bData[1] = byte; 1639 1640 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0, 1641 (__u8 *)data, size); 1642 1643 if (status < 0) 1644 dev_err(dev, "%s - failed, %d\n", __func__, status); 1645 1646 kfree(data); 1647 1648 return status; 1649 } 1650 1651 static int ti_do_download(struct usb_device *dev, int pipe, 1652 u8 *buffer, int size) 1653 { 1654 int pos; 1655 u8 cs = 0; 1656 int done; 1657 struct ti_firmware_header *header; 1658 int status = 0; 1659 int len; 1660 1661 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++) 1662 cs = (__u8)(cs + buffer[pos]); 1663 1664 header = (struct ti_firmware_header *)buffer; 1665 header->wLength = cpu_to_le16((__u16)(size 1666 - sizeof(struct ti_firmware_header))); 1667 header->bCheckSum = cs; 1668 1669 dbg("%s - downloading firmware", __func__); 1670 for (pos = 0; pos < size; pos += done) { 1671 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE); 1672 status = usb_bulk_msg(dev, pipe, buffer + pos, len, 1673 &done, 1000); 1674 if (status) 1675 break; 1676 } 1677 return status; 1678 } 1679 1680 static int ti_download_firmware(struct ti_device *tdev) 1681 { 1682 int status; 1683 int buffer_size; 1684 __u8 *buffer; 1685 struct usb_device *dev = tdev->td_serial->dev; 1686 unsigned int pipe = usb_sndbulkpipe(dev, 1687 tdev->td_serial->port[0]->bulk_out_endpointAddress); 1688 const struct firmware *fw_p; 1689 char buf[32]; 1690 1691 /* try ID specific firmware first, then try generic firmware */ 1692 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor, 1693 dev->descriptor.idProduct); 1694 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) { 1695 buf[0] = '\0'; 1696 if (dev->descriptor.idVendor == MTS_VENDOR_ID) { 1697 switch (dev->descriptor.idProduct) { 1698 case MTS_CDMA_PRODUCT_ID: 1699 strcpy(buf, "mts_cdma.fw"); 1700 break; 1701 case MTS_GSM_PRODUCT_ID: 1702 strcpy(buf, "mts_gsm.fw"); 1703 break; 1704 case MTS_EDGE_PRODUCT_ID: 1705 strcpy(buf, "mts_edge.fw"); 1706 break; 1707 } 1708 } 1709 if (buf[0] == '\0') { 1710 if (tdev->td_is_3410) 1711 strcpy(buf, "ti_3410.fw"); 1712 else 1713 strcpy(buf, "ti_5052.fw"); 1714 } 1715 status = request_firmware(&fw_p, buf, &dev->dev); 1716 } 1717 if (status) { 1718 dev_err(&dev->dev, "%s - firmware not found\n", __func__); 1719 return -ENOENT; 1720 } 1721 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) { 1722 dev_err(&dev->dev, "%s - firmware too large\n", __func__); 1723 return -ENOENT; 1724 } 1725 1726 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header); 1727 buffer = kmalloc(buffer_size, GFP_KERNEL); 1728 if (buffer) { 1729 memcpy(buffer, fw_p->data, fw_p->size); 1730 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size); 1731 status = ti_do_download(dev, pipe, buffer, fw_p->size); 1732 kfree(buffer); 1733 } else { 1734 status = -ENOMEM; 1735 } 1736 release_firmware(fw_p); 1737 if (status) { 1738 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", 1739 __func__, status); 1740 return status; 1741 } 1742 1743 dbg("%s - download successful", __func__); 1744 1745 return 0; 1746 } 1747 1748 1749 /* Circular Buffer Functions */ 1750 1751 /* 1752 * ti_buf_alloc 1753 * 1754 * Allocate a circular buffer and all associated memory. 1755 */ 1756 1757 static struct circ_buf *ti_buf_alloc(void) 1758 { 1759 struct circ_buf *cb; 1760 1761 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL); 1762 if (cb == NULL) 1763 return NULL; 1764 1765 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL); 1766 if (cb->buf == NULL) { 1767 kfree(cb); 1768 return NULL; 1769 } 1770 1771 ti_buf_clear(cb); 1772 1773 return cb; 1774 } 1775 1776 1777 /* 1778 * ti_buf_free 1779 * 1780 * Free the buffer and all associated memory. 1781 */ 1782 1783 static void ti_buf_free(struct circ_buf *cb) 1784 { 1785 kfree(cb->buf); 1786 kfree(cb); 1787 } 1788 1789 1790 /* 1791 * ti_buf_clear 1792 * 1793 * Clear out all data in the circular buffer. 1794 */ 1795 1796 static void ti_buf_clear(struct circ_buf *cb) 1797 { 1798 cb->head = cb->tail = 0; 1799 } 1800 1801 1802 /* 1803 * ti_buf_data_avail 1804 * 1805 * Return the number of bytes of data available in the circular 1806 * buffer. 1807 */ 1808 1809 static int ti_buf_data_avail(struct circ_buf *cb) 1810 { 1811 return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1812 } 1813 1814 1815 /* 1816 * ti_buf_space_avail 1817 * 1818 * Return the number of bytes of space available in the circular 1819 * buffer. 1820 */ 1821 1822 static int ti_buf_space_avail(struct circ_buf *cb) 1823 { 1824 return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1825 } 1826 1827 1828 /* 1829 * ti_buf_put 1830 * 1831 * Copy data data from a user buffer and put it into the circular buffer. 1832 * Restrict to the amount of space available. 1833 * 1834 * Return the number of bytes copied. 1835 */ 1836 1837 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count) 1838 { 1839 int c, ret = 0; 1840 1841 while (1) { 1842 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1843 if (count < c) 1844 c = count; 1845 if (c <= 0) 1846 break; 1847 memcpy(cb->buf + cb->head, buf, c); 1848 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1); 1849 buf += c; 1850 count -= c; 1851 ret += c; 1852 } 1853 1854 return ret; 1855 } 1856 1857 1858 /* 1859 * ti_buf_get 1860 * 1861 * Get data from the circular buffer and copy to the given buffer. 1862 * Restrict to the amount of data available. 1863 * 1864 * Return the number of bytes copied. 1865 */ 1866 1867 static int ti_buf_get(struct circ_buf *cb, char *buf, int count) 1868 { 1869 int c, ret = 0; 1870 1871 while (1) { 1872 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1873 if (count < c) 1874 c = count; 1875 if (c <= 0) 1876 break; 1877 memcpy(buf, cb->buf + cb->tail, c); 1878 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1); 1879 buf += c; 1880 count -= c; 1881 ret += c; 1882 } 1883 1884 return ret; 1885 } 1886