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_VERSION "v0.10" 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 kfifo write_fifo; 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, 110 unsigned int cmd, unsigned long arg); 111 static int ti_get_icount(struct tty_struct *tty, 112 struct serial_icounter_struct *icount); 113 static void ti_set_termios(struct tty_struct *tty, 114 struct usb_serial_port *port, struct ktermios *old_termios); 115 static int ti_tiocmget(struct tty_struct *tty); 116 static int ti_tiocmset(struct tty_struct *tty, 117 unsigned int set, unsigned int clear); 118 static void ti_break(struct tty_struct *tty, int break_state); 119 static void ti_interrupt_callback(struct urb *urb); 120 static void ti_bulk_in_callback(struct urb *urb); 121 static void ti_bulk_out_callback(struct urb *urb); 122 123 static void ti_recv(struct device *dev, struct tty_struct *tty, 124 unsigned char *data, int length); 125 static void ti_send(struct ti_port *tport); 126 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr); 127 static int ti_get_lsr(struct ti_port *tport); 128 static int ti_get_serial_info(struct ti_port *tport, 129 struct serial_struct __user *ret_arg); 130 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 131 struct serial_struct __user *new_arg); 132 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr); 133 134 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush); 135 136 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty); 137 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty); 138 139 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 140 __u16 moduleid, __u16 value, __u8 *data, int size); 141 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 142 __u16 moduleid, __u16 value, __u8 *data, int size); 143 144 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 145 __u8 mask, __u8 byte); 146 147 static int ti_download_firmware(struct ti_device *tdev); 148 149 150 /* Data */ 151 152 /* module parameters */ 153 static bool debug; 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 .open = ti_open, 227 .close = ti_close, 228 .write = ti_write, 229 .write_room = ti_write_room, 230 .chars_in_buffer = ti_chars_in_buffer, 231 .throttle = ti_throttle, 232 .unthrottle = ti_unthrottle, 233 .ioctl = ti_ioctl, 234 .set_termios = ti_set_termios, 235 .tiocmget = ti_tiocmget, 236 .tiocmset = ti_tiocmset, 237 .get_icount = ti_get_icount, 238 .break_ctl = ti_break, 239 .read_int_callback = ti_interrupt_callback, 240 .read_bulk_callback = ti_bulk_in_callback, 241 .write_bulk_callback = ti_bulk_out_callback, 242 }; 243 244 static struct usb_serial_driver ti_2port_device = { 245 .driver = { 246 .owner = THIS_MODULE, 247 .name = "ti_usb_3410_5052_2", 248 }, 249 .description = "TI USB 5052 2 port adapter", 250 .id_table = ti_id_table_5052, 251 .num_ports = 2, 252 .attach = ti_startup, 253 .release = ti_release, 254 .open = ti_open, 255 .close = ti_close, 256 .write = ti_write, 257 .write_room = ti_write_room, 258 .chars_in_buffer = ti_chars_in_buffer, 259 .throttle = ti_throttle, 260 .unthrottle = ti_unthrottle, 261 .ioctl = ti_ioctl, 262 .set_termios = ti_set_termios, 263 .tiocmget = ti_tiocmget, 264 .tiocmset = ti_tiocmset, 265 .get_icount = ti_get_icount, 266 .break_ctl = ti_break, 267 .read_int_callback = ti_interrupt_callback, 268 .read_bulk_callback = ti_bulk_in_callback, 269 .write_bulk_callback = ti_bulk_out_callback, 270 }; 271 272 static struct usb_serial_driver * const serial_drivers[] = { 273 &ti_1port_device, &ti_2port_device, NULL 274 }; 275 276 /* Module */ 277 278 MODULE_AUTHOR(TI_DRIVER_AUTHOR); 279 MODULE_DESCRIPTION(TI_DRIVER_DESC); 280 MODULE_VERSION(TI_DRIVER_VERSION); 281 MODULE_LICENSE("GPL"); 282 283 MODULE_FIRMWARE("ti_3410.fw"); 284 MODULE_FIRMWARE("ti_5052.fw"); 285 MODULE_FIRMWARE("mts_cdma.fw"); 286 MODULE_FIRMWARE("mts_gsm.fw"); 287 MODULE_FIRMWARE("mts_edge.fw"); 288 MODULE_FIRMWARE("mts_mt9234mu.fw"); 289 MODULE_FIRMWARE("mts_mt9234zba.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_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined); 343 if (ret == 0) 344 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":" 345 TI_DRIVER_DESC "\n"); 346 return ret; 347 } 348 349 static void __exit ti_exit(void) 350 { 351 usb_serial_deregister_drivers(serial_drivers); 352 } 353 354 module_init(ti_init); 355 module_exit(ti_exit); 356 357 358 static int ti_startup(struct usb_serial *serial) 359 { 360 struct ti_device *tdev; 361 struct ti_port *tport; 362 struct usb_device *dev = serial->dev; 363 int status; 364 int i; 365 366 367 dbg("%s - product 0x%4X, num configurations %d, configuration value %d", 368 __func__, le16_to_cpu(dev->descriptor.idProduct), 369 dev->descriptor.bNumConfigurations, 370 dev->actconfig->desc.bConfigurationValue); 371 372 /* create device structure */ 373 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL); 374 if (tdev == NULL) { 375 dev_err(&dev->dev, "%s - out of memory\n", __func__); 376 return -ENOMEM; 377 } 378 mutex_init(&tdev->td_open_close_lock); 379 tdev->td_serial = serial; 380 usb_set_serial_data(serial, tdev); 381 382 /* determine device type */ 383 if (usb_match_id(serial->interface, ti_id_table_3410)) 384 tdev->td_is_3410 = 1; 385 dbg("%s - device type is %s", __func__, 386 tdev->td_is_3410 ? "3410" : "5052"); 387 388 /* if we have only 1 configuration, download firmware */ 389 if (dev->descriptor.bNumConfigurations == 1) { 390 status = ti_download_firmware(tdev); 391 392 if (status != 0) 393 goto free_tdev; 394 395 /* 3410 must be reset, 5052 resets itself */ 396 if (tdev->td_is_3410) { 397 msleep_interruptible(100); 398 usb_reset_device(dev); 399 } 400 401 status = -ENODEV; 402 goto free_tdev; 403 } 404 405 /* the second configuration must be set */ 406 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) { 407 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG); 408 status = status ? status : -ENODEV; 409 goto free_tdev; 410 } 411 412 /* set up port structures */ 413 for (i = 0; i < serial->num_ports; ++i) { 414 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL); 415 if (tport == NULL) { 416 dev_err(&dev->dev, "%s - out of memory\n", __func__); 417 status = -ENOMEM; 418 goto free_tports; 419 } 420 spin_lock_init(&tport->tp_lock); 421 tport->tp_uart_base_addr = (i == 0 ? 422 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR); 423 tport->tp_closing_wait = closing_wait; 424 init_waitqueue_head(&tport->tp_msr_wait); 425 init_waitqueue_head(&tport->tp_write_wait); 426 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, 427 GFP_KERNEL)) { 428 dev_err(&dev->dev, "%s - out of memory\n", __func__); 429 kfree(tport); 430 status = -ENOMEM; 431 goto free_tports; 432 } 433 tport->tp_port = serial->port[i]; 434 tport->tp_tdev = tdev; 435 usb_set_serial_port_data(serial->port[i], tport); 436 tport->tp_uart_mode = 0; /* default is RS232 */ 437 } 438 439 return 0; 440 441 free_tports: 442 for (--i; i >= 0; --i) { 443 tport = usb_get_serial_port_data(serial->port[i]); 444 kfifo_free(&tport->write_fifo); 445 kfree(tport); 446 usb_set_serial_port_data(serial->port[i], NULL); 447 } 448 free_tdev: 449 kfree(tdev); 450 usb_set_serial_data(serial, NULL); 451 return status; 452 } 453 454 455 static void ti_release(struct usb_serial *serial) 456 { 457 int i; 458 struct ti_device *tdev = usb_get_serial_data(serial); 459 struct ti_port *tport; 460 461 for (i = 0; i < serial->num_ports; ++i) { 462 tport = usb_get_serial_port_data(serial->port[i]); 463 if (tport) { 464 kfifo_free(&tport->write_fifo); 465 kfree(tport); 466 } 467 } 468 469 kfree(tdev); 470 } 471 472 473 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port) 474 { 475 struct ti_port *tport = usb_get_serial_port_data(port); 476 struct ti_device *tdev; 477 struct usb_device *dev; 478 struct urb *urb; 479 int port_number; 480 int status; 481 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 482 TI_PIPE_TIMEOUT_ENABLE | 483 (TI_TRANSFER_TIMEOUT << 2)); 484 485 if (tport == NULL) 486 return -ENODEV; 487 488 dev = port->serial->dev; 489 tdev = tport->tp_tdev; 490 491 /* only one open on any port on a device at a time */ 492 if (mutex_lock_interruptible(&tdev->td_open_close_lock)) 493 return -ERESTARTSYS; 494 495 port_number = port->number - port->serial->minor; 496 497 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount)); 498 499 tport->tp_msr = 0; 500 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR); 501 502 /* start interrupt urb the first time a port is opened on this device */ 503 if (tdev->td_open_port_count == 0) { 504 dbg("%s - start interrupt in urb", __func__); 505 urb = tdev->td_serial->port[0]->interrupt_in_urb; 506 if (!urb) { 507 dev_err(&port->dev, "%s - no interrupt urb\n", 508 __func__); 509 status = -EINVAL; 510 goto release_lock; 511 } 512 urb->context = tdev; 513 status = usb_submit_urb(urb, GFP_KERNEL); 514 if (status) { 515 dev_err(&port->dev, 516 "%s - submit interrupt urb failed, %d\n", 517 __func__, status); 518 goto release_lock; 519 } 520 } 521 522 if (tty) 523 ti_set_termios(tty, port, tty->termios); 524 525 dbg("%s - sending TI_OPEN_PORT", __func__); 526 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 527 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 528 if (status) { 529 dev_err(&port->dev, "%s - cannot send open command, %d\n", 530 __func__, status); 531 goto unlink_int_urb; 532 } 533 534 dbg("%s - sending TI_START_PORT", __func__); 535 status = ti_command_out_sync(tdev, TI_START_PORT, 536 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 537 if (status) { 538 dev_err(&port->dev, "%s - cannot send start command, %d\n", 539 __func__, status); 540 goto unlink_int_urb; 541 } 542 543 dbg("%s - sending TI_PURGE_PORT", __func__); 544 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 545 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0); 546 if (status) { 547 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", 548 __func__, status); 549 goto unlink_int_urb; 550 } 551 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 552 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0); 553 if (status) { 554 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", 555 __func__, status); 556 goto unlink_int_urb; 557 } 558 559 /* reset the data toggle on the bulk endpoints to work around bug in 560 * host controllers where things get out of sync some times */ 561 usb_clear_halt(dev, port->write_urb->pipe); 562 usb_clear_halt(dev, port->read_urb->pipe); 563 564 if (tty) 565 ti_set_termios(tty, port, tty->termios); 566 567 dbg("%s - sending TI_OPEN_PORT (2)", __func__); 568 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 569 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 570 if (status) { 571 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", 572 __func__, status); 573 goto unlink_int_urb; 574 } 575 576 dbg("%s - sending TI_START_PORT (2)", __func__); 577 status = ti_command_out_sync(tdev, TI_START_PORT, 578 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 579 if (status) { 580 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", 581 __func__, status); 582 goto unlink_int_urb; 583 } 584 585 /* start read urb */ 586 dbg("%s - start read urb", __func__); 587 urb = port->read_urb; 588 if (!urb) { 589 dev_err(&port->dev, "%s - no read urb\n", __func__); 590 status = -EINVAL; 591 goto unlink_int_urb; 592 } 593 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 594 urb->context = tport; 595 status = usb_submit_urb(urb, GFP_KERNEL); 596 if (status) { 597 dev_err(&port->dev, "%s - submit read urb failed, %d\n", 598 __func__, status); 599 goto unlink_int_urb; 600 } 601 602 tport->tp_is_open = 1; 603 ++tdev->td_open_port_count; 604 605 goto release_lock; 606 607 unlink_int_urb: 608 if (tdev->td_open_port_count == 0) 609 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 610 release_lock: 611 mutex_unlock(&tdev->td_open_close_lock); 612 dbg("%s - exit %d", __func__, status); 613 return status; 614 } 615 616 617 static void ti_close(struct usb_serial_port *port) 618 { 619 struct ti_device *tdev; 620 struct ti_port *tport; 621 int port_number; 622 int status; 623 int do_unlock; 624 625 tdev = usb_get_serial_data(port->serial); 626 tport = usb_get_serial_port_data(port); 627 if (tdev == NULL || tport == NULL) 628 return; 629 630 tport->tp_is_open = 0; 631 632 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1); 633 634 usb_kill_urb(port->read_urb); 635 usb_kill_urb(port->write_urb); 636 tport->tp_write_urb_in_use = 0; 637 638 port_number = port->number - port->serial->minor; 639 640 dbg("%s - sending TI_CLOSE_PORT", __func__); 641 status = ti_command_out_sync(tdev, TI_CLOSE_PORT, 642 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 643 if (status) 644 dev_err(&port->dev, 645 "%s - cannot send close port command, %d\n" 646 , __func__, status); 647 648 /* if mutex_lock is interrupted, continue anyway */ 649 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock); 650 --tport->tp_tdev->td_open_port_count; 651 if (tport->tp_tdev->td_open_port_count <= 0) { 652 /* last port is closed, shut down interrupt urb */ 653 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 654 tport->tp_tdev->td_open_port_count = 0; 655 } 656 if (do_unlock) 657 mutex_unlock(&tdev->td_open_close_lock); 658 } 659 660 661 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 662 const unsigned char *data, int count) 663 { 664 struct ti_port *tport = usb_get_serial_port_data(port); 665 666 if (count == 0) { 667 dbg("%s - write request of 0 bytes", __func__); 668 return 0; 669 } 670 671 if (tport == NULL || !tport->tp_is_open) 672 return -ENODEV; 673 674 count = kfifo_in_locked(&tport->write_fifo, data, count, 675 &tport->tp_lock); 676 ti_send(tport); 677 678 return count; 679 } 680 681 682 static int ti_write_room(struct tty_struct *tty) 683 { 684 struct usb_serial_port *port = tty->driver_data; 685 struct ti_port *tport = usb_get_serial_port_data(port); 686 int room = 0; 687 unsigned long flags; 688 689 if (tport == NULL) 690 return 0; 691 692 spin_lock_irqsave(&tport->tp_lock, flags); 693 room = kfifo_avail(&tport->write_fifo); 694 spin_unlock_irqrestore(&tport->tp_lock, flags); 695 696 dbg("%s - returns %d", __func__, room); 697 return room; 698 } 699 700 701 static int ti_chars_in_buffer(struct tty_struct *tty) 702 { 703 struct usb_serial_port *port = tty->driver_data; 704 struct ti_port *tport = usb_get_serial_port_data(port); 705 int chars = 0; 706 unsigned long flags; 707 708 if (tport == NULL) 709 return 0; 710 711 spin_lock_irqsave(&tport->tp_lock, flags); 712 chars = kfifo_len(&tport->write_fifo); 713 spin_unlock_irqrestore(&tport->tp_lock, flags); 714 715 dbg("%s - returns %d", __func__, chars); 716 return chars; 717 } 718 719 720 static void ti_throttle(struct tty_struct *tty) 721 { 722 struct usb_serial_port *port = tty->driver_data; 723 struct ti_port *tport = usb_get_serial_port_data(port); 724 725 if (tport == NULL) 726 return; 727 728 if (I_IXOFF(tty) || C_CRTSCTS(tty)) 729 ti_stop_read(tport, tty); 730 731 } 732 733 734 static void ti_unthrottle(struct tty_struct *tty) 735 { 736 struct usb_serial_port *port = tty->driver_data; 737 struct ti_port *tport = usb_get_serial_port_data(port); 738 int status; 739 740 if (tport == NULL) 741 return; 742 743 if (I_IXOFF(tty) || C_CRTSCTS(tty)) { 744 status = ti_restart_read(tport, tty); 745 if (status) 746 dev_err(&port->dev, "%s - cannot restart read, %d\n", 747 __func__, status); 748 } 749 } 750 751 static int ti_get_icount(struct tty_struct *tty, 752 struct serial_icounter_struct *icount) 753 { 754 struct usb_serial_port *port = tty->driver_data; 755 struct ti_port *tport = usb_get_serial_port_data(port); 756 struct async_icount cnow = tport->tp_icount; 757 758 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", 759 __func__, port->number, 760 cnow.rx, cnow.tx); 761 762 icount->cts = cnow.cts; 763 icount->dsr = cnow.dsr; 764 icount->rng = cnow.rng; 765 icount->dcd = cnow.dcd; 766 icount->rx = cnow.rx; 767 icount->tx = cnow.tx; 768 icount->frame = cnow.frame; 769 icount->overrun = cnow.overrun; 770 icount->parity = cnow.parity; 771 icount->brk = cnow.brk; 772 icount->buf_overrun = cnow.buf_overrun; 773 774 return 0; 775 } 776 777 static int ti_ioctl(struct tty_struct *tty, 778 unsigned int cmd, unsigned long arg) 779 { 780 struct usb_serial_port *port = tty->driver_data; 781 struct ti_port *tport = usb_get_serial_port_data(port); 782 struct async_icount cnow; 783 struct async_icount cprev; 784 785 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd); 786 787 if (tport == NULL) 788 return -ENODEV; 789 790 switch (cmd) { 791 case TIOCGSERIAL: 792 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number); 793 return ti_get_serial_info(tport, 794 (struct serial_struct __user *)arg); 795 case TIOCSSERIAL: 796 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number); 797 return ti_set_serial_info(tty, tport, 798 (struct serial_struct __user *)arg); 799 case TIOCMIWAIT: 800 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number); 801 cprev = tport->tp_icount; 802 while (1) { 803 interruptible_sleep_on(&tport->tp_msr_wait); 804 if (signal_pending(current)) 805 return -ERESTARTSYS; 806 cnow = tport->tp_icount; 807 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 808 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 809 return -EIO; /* no change => error */ 810 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 811 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 812 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 813 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) 814 return 0; 815 cprev = cnow; 816 } 817 break; 818 } 819 return -ENOIOCTLCMD; 820 } 821 822 823 static void ti_set_termios(struct tty_struct *tty, 824 struct usb_serial_port *port, struct ktermios *old_termios) 825 { 826 struct ti_port *tport = usb_get_serial_port_data(port); 827 struct ti_uart_config *config; 828 tcflag_t cflag, iflag; 829 int baud; 830 int status; 831 int port_number = port->number - port->serial->minor; 832 unsigned int mcr; 833 834 cflag = tty->termios->c_cflag; 835 iflag = tty->termios->c_iflag; 836 837 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag); 838 dbg("%s - old clfag %08x, old iflag %08x", __func__, 839 old_termios->c_cflag, old_termios->c_iflag); 840 841 if (tport == NULL) 842 return; 843 844 config = kmalloc(sizeof(*config), GFP_KERNEL); 845 if (!config) { 846 dev_err(&port->dev, "%s - out of memory\n", __func__); 847 return; 848 } 849 850 config->wFlags = 0; 851 852 /* these flags must be set */ 853 config->wFlags |= TI_UART_ENABLE_MS_INTS; 854 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA; 855 config->bUartMode = (__u8)(tport->tp_uart_mode); 856 857 switch (cflag & CSIZE) { 858 case CS5: 859 config->bDataBits = TI_UART_5_DATA_BITS; 860 break; 861 case CS6: 862 config->bDataBits = TI_UART_6_DATA_BITS; 863 break; 864 case CS7: 865 config->bDataBits = TI_UART_7_DATA_BITS; 866 break; 867 default: 868 case CS8: 869 config->bDataBits = TI_UART_8_DATA_BITS; 870 break; 871 } 872 873 /* CMSPAR isn't supported by this driver */ 874 tty->termios->c_cflag &= ~CMSPAR; 875 876 if (cflag & PARENB) { 877 if (cflag & PARODD) { 878 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 879 config->bParity = TI_UART_ODD_PARITY; 880 } else { 881 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 882 config->bParity = TI_UART_EVEN_PARITY; 883 } 884 } else { 885 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING; 886 config->bParity = TI_UART_NO_PARITY; 887 } 888 889 if (cflag & CSTOPB) 890 config->bStopBits = TI_UART_2_STOP_BITS; 891 else 892 config->bStopBits = TI_UART_1_STOP_BITS; 893 894 if (cflag & CRTSCTS) { 895 /* RTS flow control must be off to drop RTS for baud rate B0 */ 896 if ((cflag & CBAUD) != B0) 897 config->wFlags |= TI_UART_ENABLE_RTS_IN; 898 config->wFlags |= TI_UART_ENABLE_CTS_OUT; 899 } else { 900 tty->hw_stopped = 0; 901 ti_restart_read(tport, tty); 902 } 903 904 if (I_IXOFF(tty) || I_IXON(tty)) { 905 config->cXon = START_CHAR(tty); 906 config->cXoff = STOP_CHAR(tty); 907 908 if (I_IXOFF(tty)) 909 config->wFlags |= TI_UART_ENABLE_X_IN; 910 else 911 ti_restart_read(tport, tty); 912 913 if (I_IXON(tty)) 914 config->wFlags |= TI_UART_ENABLE_X_OUT; 915 } 916 917 baud = tty_get_baud_rate(tty); 918 if (!baud) 919 baud = 9600; 920 if (tport->tp_tdev->td_is_3410) 921 config->wBaudRate = (__u16)((923077 + baud/2) / baud); 922 else 923 config->wBaudRate = (__u16)((461538 + baud/2) / baud); 924 925 /* FIXME: Should calculate resulting baud here and report it back */ 926 if ((cflag & CBAUD) != B0) 927 tty_encode_baud_rate(tty, baud, baud); 928 929 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d", 930 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode); 931 932 cpu_to_be16s(&config->wBaudRate); 933 cpu_to_be16s(&config->wFlags); 934 935 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG, 936 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config, 937 sizeof(*config)); 938 if (status) 939 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", 940 __func__, port_number, status); 941 942 /* SET_CONFIG asserts RTS and DTR, reset them correctly */ 943 mcr = tport->tp_shadow_mcr; 944 /* if baud rate is B0, clear RTS and DTR */ 945 if ((cflag & CBAUD) == B0) 946 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS); 947 status = ti_set_mcr(tport, mcr); 948 if (status) 949 dev_err(&port->dev, 950 "%s - cannot set modem control on port %d, %d\n", 951 __func__, port_number, status); 952 953 kfree(config); 954 } 955 956 957 static int ti_tiocmget(struct tty_struct *tty) 958 { 959 struct usb_serial_port *port = tty->driver_data; 960 struct ti_port *tport = usb_get_serial_port_data(port); 961 unsigned int result; 962 unsigned int msr; 963 unsigned int mcr; 964 unsigned long flags; 965 966 if (tport == NULL) 967 return -ENODEV; 968 969 spin_lock_irqsave(&tport->tp_lock, flags); 970 msr = tport->tp_msr; 971 mcr = tport->tp_shadow_mcr; 972 spin_unlock_irqrestore(&tport->tp_lock, flags); 973 974 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0) 975 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0) 976 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0) 977 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0) 978 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0) 979 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0) 980 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0); 981 982 dbg("%s - 0x%04X", __func__, result); 983 984 return result; 985 } 986 987 988 static int ti_tiocmset(struct tty_struct *tty, 989 unsigned int set, unsigned int clear) 990 { 991 struct usb_serial_port *port = tty->driver_data; 992 struct ti_port *tport = usb_get_serial_port_data(port); 993 unsigned int mcr; 994 unsigned long flags; 995 996 if (tport == NULL) 997 return -ENODEV; 998 999 spin_lock_irqsave(&tport->tp_lock, flags); 1000 mcr = tport->tp_shadow_mcr; 1001 1002 if (set & TIOCM_RTS) 1003 mcr |= TI_MCR_RTS; 1004 if (set & TIOCM_DTR) 1005 mcr |= TI_MCR_DTR; 1006 if (set & TIOCM_LOOP) 1007 mcr |= TI_MCR_LOOP; 1008 1009 if (clear & TIOCM_RTS) 1010 mcr &= ~TI_MCR_RTS; 1011 if (clear & TIOCM_DTR) 1012 mcr &= ~TI_MCR_DTR; 1013 if (clear & TIOCM_LOOP) 1014 mcr &= ~TI_MCR_LOOP; 1015 spin_unlock_irqrestore(&tport->tp_lock, flags); 1016 1017 return ti_set_mcr(tport, mcr); 1018 } 1019 1020 1021 static void ti_break(struct tty_struct *tty, int break_state) 1022 { 1023 struct usb_serial_port *port = tty->driver_data; 1024 struct ti_port *tport = usb_get_serial_port_data(port); 1025 int status; 1026 1027 dbg("%s - state = %d", __func__, break_state); 1028 1029 if (tport == NULL) 1030 return; 1031 1032 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0); 1033 1034 status = ti_write_byte(tport->tp_tdev, 1035 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR, 1036 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0); 1037 1038 if (status) 1039 dbg("%s - error setting break, %d", __func__, status); 1040 } 1041 1042 1043 static void ti_interrupt_callback(struct urb *urb) 1044 { 1045 struct ti_device *tdev = urb->context; 1046 struct usb_serial_port *port; 1047 struct usb_serial *serial = tdev->td_serial; 1048 struct ti_port *tport; 1049 struct device *dev = &urb->dev->dev; 1050 unsigned char *data = urb->transfer_buffer; 1051 int length = urb->actual_length; 1052 int port_number; 1053 int function; 1054 int status = urb->status; 1055 int retval; 1056 __u8 msr; 1057 1058 switch (status) { 1059 case 0: 1060 break; 1061 case -ECONNRESET: 1062 case -ENOENT: 1063 case -ESHUTDOWN: 1064 dbg("%s - urb shutting down, %d", __func__, status); 1065 tdev->td_urb_error = 1; 1066 return; 1067 default: 1068 dev_err(dev, "%s - nonzero urb status, %d\n", 1069 __func__, status); 1070 tdev->td_urb_error = 1; 1071 goto exit; 1072 } 1073 1074 if (length != 2) { 1075 dbg("%s - bad packet size, %d", __func__, length); 1076 goto exit; 1077 } 1078 1079 if (data[0] == TI_CODE_HARDWARE_ERROR) { 1080 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]); 1081 goto exit; 1082 } 1083 1084 port_number = TI_GET_PORT_FROM_CODE(data[0]); 1085 function = TI_GET_FUNC_FROM_CODE(data[0]); 1086 1087 dbg("%s - port_number %d, function %d, data 0x%02X", 1088 __func__, port_number, function, data[1]); 1089 1090 if (port_number >= serial->num_ports) { 1091 dev_err(dev, "%s - bad port number, %d\n", 1092 __func__, port_number); 1093 goto exit; 1094 } 1095 1096 port = serial->port[port_number]; 1097 1098 tport = usb_get_serial_port_data(port); 1099 if (!tport) 1100 goto exit; 1101 1102 switch (function) { 1103 case TI_CODE_DATA_ERROR: 1104 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", 1105 __func__, port_number, data[1]); 1106 break; 1107 1108 case TI_CODE_MODEM_STATUS: 1109 msr = data[1]; 1110 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr); 1111 ti_handle_new_msr(tport, msr); 1112 break; 1113 1114 default: 1115 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", 1116 __func__, data[1]); 1117 break; 1118 } 1119 1120 exit: 1121 retval = usb_submit_urb(urb, GFP_ATOMIC); 1122 if (retval) 1123 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", 1124 __func__, retval); 1125 } 1126 1127 1128 static void ti_bulk_in_callback(struct urb *urb) 1129 { 1130 struct ti_port *tport = urb->context; 1131 struct usb_serial_port *port = tport->tp_port; 1132 struct device *dev = &urb->dev->dev; 1133 int status = urb->status; 1134 int retval = 0; 1135 struct tty_struct *tty; 1136 1137 switch (status) { 1138 case 0: 1139 break; 1140 case -ECONNRESET: 1141 case -ENOENT: 1142 case -ESHUTDOWN: 1143 dbg("%s - urb shutting down, %d", __func__, status); 1144 tport->tp_tdev->td_urb_error = 1; 1145 wake_up_interruptible(&tport->tp_write_wait); 1146 return; 1147 default: 1148 dev_err(dev, "%s - nonzero urb status, %d\n", 1149 __func__, status); 1150 tport->tp_tdev->td_urb_error = 1; 1151 wake_up_interruptible(&tport->tp_write_wait); 1152 } 1153 1154 if (status == -EPIPE) 1155 goto exit; 1156 1157 if (status) { 1158 dev_err(dev, "%s - stopping read!\n", __func__); 1159 return; 1160 } 1161 1162 tty = tty_port_tty_get(&port->port); 1163 if (tty) { 1164 if (urb->actual_length) { 1165 usb_serial_debug_data(debug, dev, __func__, 1166 urb->actual_length, urb->transfer_buffer); 1167 1168 if (!tport->tp_is_open) 1169 dbg("%s - port closed, dropping data", 1170 __func__); 1171 else 1172 ti_recv(&urb->dev->dev, tty, 1173 urb->transfer_buffer, 1174 urb->actual_length); 1175 spin_lock(&tport->tp_lock); 1176 tport->tp_icount.rx += urb->actual_length; 1177 spin_unlock(&tport->tp_lock); 1178 } 1179 tty_kref_put(tty); 1180 } 1181 1182 exit: 1183 /* continue to read unless stopping */ 1184 spin_lock(&tport->tp_lock); 1185 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1186 retval = usb_submit_urb(urb, GFP_ATOMIC); 1187 else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) 1188 tport->tp_read_urb_state = TI_READ_URB_STOPPED; 1189 1190 spin_unlock(&tport->tp_lock); 1191 if (retval) 1192 dev_err(dev, "%s - resubmit read urb failed, %d\n", 1193 __func__, retval); 1194 } 1195 1196 1197 static void ti_bulk_out_callback(struct urb *urb) 1198 { 1199 struct ti_port *tport = urb->context; 1200 struct usb_serial_port *port = tport->tp_port; 1201 int status = urb->status; 1202 1203 tport->tp_write_urb_in_use = 0; 1204 1205 switch (status) { 1206 case 0: 1207 break; 1208 case -ECONNRESET: 1209 case -ENOENT: 1210 case -ESHUTDOWN: 1211 dbg("%s - urb shutting down, %d", __func__, status); 1212 tport->tp_tdev->td_urb_error = 1; 1213 wake_up_interruptible(&tport->tp_write_wait); 1214 return; 1215 default: 1216 dev_err_console(port, "%s - nonzero urb status, %d\n", 1217 __func__, status); 1218 tport->tp_tdev->td_urb_error = 1; 1219 wake_up_interruptible(&tport->tp_write_wait); 1220 } 1221 1222 /* send any buffered data */ 1223 ti_send(tport); 1224 } 1225 1226 1227 static void ti_recv(struct device *dev, struct tty_struct *tty, 1228 unsigned char *data, int length) 1229 { 1230 int cnt; 1231 1232 do { 1233 cnt = tty_insert_flip_string(tty, data, length); 1234 if (cnt < length) { 1235 dev_err(dev, "%s - dropping data, %d bytes lost\n", 1236 __func__, length - cnt); 1237 if (cnt == 0) 1238 break; 1239 } 1240 tty_flip_buffer_push(tty); 1241 data += cnt; 1242 length -= cnt; 1243 } while (length > 0); 1244 1245 } 1246 1247 1248 static void ti_send(struct ti_port *tport) 1249 { 1250 int count, result; 1251 struct usb_serial_port *port = tport->tp_port; 1252 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */ 1253 unsigned long flags; 1254 1255 spin_lock_irqsave(&tport->tp_lock, flags); 1256 1257 if (tport->tp_write_urb_in_use) 1258 goto unlock; 1259 1260 count = kfifo_out(&tport->write_fifo, 1261 port->write_urb->transfer_buffer, 1262 port->bulk_out_size); 1263 1264 if (count == 0) 1265 goto unlock; 1266 1267 tport->tp_write_urb_in_use = 1; 1268 1269 spin_unlock_irqrestore(&tport->tp_lock, flags); 1270 1271 usb_serial_debug_data(debug, &port->dev, __func__, count, 1272 port->write_urb->transfer_buffer); 1273 1274 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 1275 usb_sndbulkpipe(port->serial->dev, 1276 port->bulk_out_endpointAddress), 1277 port->write_urb->transfer_buffer, count, 1278 ti_bulk_out_callback, tport); 1279 1280 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 1281 if (result) { 1282 dev_err_console(port, "%s - submit write urb failed, %d\n", 1283 __func__, result); 1284 tport->tp_write_urb_in_use = 0; 1285 /* TODO: reschedule ti_send */ 1286 } else { 1287 spin_lock_irqsave(&tport->tp_lock, flags); 1288 tport->tp_icount.tx += count; 1289 spin_unlock_irqrestore(&tport->tp_lock, flags); 1290 } 1291 1292 /* more room in the buffer for new writes, wakeup */ 1293 if (tty) 1294 tty_wakeup(tty); 1295 tty_kref_put(tty); 1296 wake_up_interruptible(&tport->tp_write_wait); 1297 return; 1298 unlock: 1299 spin_unlock_irqrestore(&tport->tp_lock, flags); 1300 tty_kref_put(tty); 1301 return; 1302 } 1303 1304 1305 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr) 1306 { 1307 unsigned long flags; 1308 int status; 1309 1310 status = ti_write_byte(tport->tp_tdev, 1311 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR, 1312 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr); 1313 1314 spin_lock_irqsave(&tport->tp_lock, flags); 1315 if (!status) 1316 tport->tp_shadow_mcr = mcr; 1317 spin_unlock_irqrestore(&tport->tp_lock, flags); 1318 1319 return status; 1320 } 1321 1322 1323 static int ti_get_lsr(struct ti_port *tport) 1324 { 1325 int size, status; 1326 struct ti_device *tdev = tport->tp_tdev; 1327 struct usb_serial_port *port = tport->tp_port; 1328 int port_number = port->number - port->serial->minor; 1329 struct ti_port_status *data; 1330 1331 size = sizeof(struct ti_port_status); 1332 data = kmalloc(size, GFP_KERNEL); 1333 if (!data) { 1334 dev_err(&port->dev, "%s - out of memory\n", __func__); 1335 return -ENOMEM; 1336 } 1337 1338 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS, 1339 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size); 1340 if (status) { 1341 dev_err(&port->dev, 1342 "%s - get port status command failed, %d\n", 1343 __func__, status); 1344 goto free_data; 1345 } 1346 1347 dbg("%s - lsr 0x%02X", __func__, data->bLSR); 1348 1349 tport->tp_lsr = data->bLSR; 1350 1351 free_data: 1352 kfree(data); 1353 return status; 1354 } 1355 1356 1357 static int ti_get_serial_info(struct ti_port *tport, 1358 struct serial_struct __user *ret_arg) 1359 { 1360 struct usb_serial_port *port = tport->tp_port; 1361 struct serial_struct ret_serial; 1362 1363 if (!ret_arg) 1364 return -EFAULT; 1365 1366 memset(&ret_serial, 0, sizeof(ret_serial)); 1367 1368 ret_serial.type = PORT_16550A; 1369 ret_serial.line = port->serial->minor; 1370 ret_serial.port = port->number - port->serial->minor; 1371 ret_serial.flags = tport->tp_flags; 1372 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE; 1373 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800; 1374 ret_serial.closing_wait = tport->tp_closing_wait; 1375 1376 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg))) 1377 return -EFAULT; 1378 1379 return 0; 1380 } 1381 1382 1383 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 1384 struct serial_struct __user *new_arg) 1385 { 1386 struct serial_struct new_serial; 1387 1388 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial))) 1389 return -EFAULT; 1390 1391 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS; 1392 tport->tp_closing_wait = new_serial.closing_wait; 1393 1394 return 0; 1395 } 1396 1397 1398 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr) 1399 { 1400 struct async_icount *icount; 1401 struct tty_struct *tty; 1402 unsigned long flags; 1403 1404 dbg("%s - msr 0x%02X", __func__, msr); 1405 1406 if (msr & TI_MSR_DELTA_MASK) { 1407 spin_lock_irqsave(&tport->tp_lock, flags); 1408 icount = &tport->tp_icount; 1409 if (msr & TI_MSR_DELTA_CTS) 1410 icount->cts++; 1411 if (msr & TI_MSR_DELTA_DSR) 1412 icount->dsr++; 1413 if (msr & TI_MSR_DELTA_CD) 1414 icount->dcd++; 1415 if (msr & TI_MSR_DELTA_RI) 1416 icount->rng++; 1417 wake_up_interruptible(&tport->tp_msr_wait); 1418 spin_unlock_irqrestore(&tport->tp_lock, flags); 1419 } 1420 1421 tport->tp_msr = msr & TI_MSR_MASK; 1422 1423 /* handle CTS flow control */ 1424 tty = tty_port_tty_get(&tport->tp_port->port); 1425 if (tty && C_CRTSCTS(tty)) { 1426 if (msr & TI_MSR_CTS) { 1427 tty->hw_stopped = 0; 1428 tty_wakeup(tty); 1429 } else { 1430 tty->hw_stopped = 1; 1431 } 1432 } 1433 tty_kref_put(tty); 1434 } 1435 1436 1437 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush) 1438 { 1439 struct ti_device *tdev = tport->tp_tdev; 1440 struct usb_serial_port *port = tport->tp_port; 1441 wait_queue_t wait; 1442 1443 spin_lock_irq(&tport->tp_lock); 1444 1445 /* wait for data to drain from the buffer */ 1446 tdev->td_urb_error = 0; 1447 init_waitqueue_entry(&wait, current); 1448 add_wait_queue(&tport->tp_write_wait, &wait); 1449 for (;;) { 1450 set_current_state(TASK_INTERRUPTIBLE); 1451 if (kfifo_len(&tport->write_fifo) == 0 1452 || timeout == 0 || signal_pending(current) 1453 || tdev->td_urb_error 1454 || port->serial->disconnected) /* disconnect */ 1455 break; 1456 spin_unlock_irq(&tport->tp_lock); 1457 timeout = schedule_timeout(timeout); 1458 spin_lock_irq(&tport->tp_lock); 1459 } 1460 set_current_state(TASK_RUNNING); 1461 remove_wait_queue(&tport->tp_write_wait, &wait); 1462 1463 /* flush any remaining data in the buffer */ 1464 if (flush) 1465 kfifo_reset_out(&tport->write_fifo); 1466 1467 spin_unlock_irq(&tport->tp_lock); 1468 1469 mutex_lock(&port->serial->disc_mutex); 1470 /* wait for data to drain from the device */ 1471 /* wait for empty tx register, plus 20 ms */ 1472 timeout += jiffies; 1473 tport->tp_lsr &= ~TI_LSR_TX_EMPTY; 1474 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 1475 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error 1476 && !port->serial->disconnected) { 1477 if (ti_get_lsr(tport)) 1478 break; 1479 mutex_unlock(&port->serial->disc_mutex); 1480 msleep_interruptible(20); 1481 mutex_lock(&port->serial->disc_mutex); 1482 } 1483 mutex_unlock(&port->serial->disc_mutex); 1484 } 1485 1486 1487 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty) 1488 { 1489 unsigned long flags; 1490 1491 spin_lock_irqsave(&tport->tp_lock, flags); 1492 1493 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1494 tport->tp_read_urb_state = TI_READ_URB_STOPPING; 1495 1496 spin_unlock_irqrestore(&tport->tp_lock, flags); 1497 } 1498 1499 1500 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty) 1501 { 1502 struct urb *urb; 1503 int status = 0; 1504 unsigned long flags; 1505 1506 spin_lock_irqsave(&tport->tp_lock, flags); 1507 1508 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) { 1509 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1510 urb = tport->tp_port->read_urb; 1511 spin_unlock_irqrestore(&tport->tp_lock, flags); 1512 urb->context = tport; 1513 status = usb_submit_urb(urb, GFP_KERNEL); 1514 } else { 1515 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1516 spin_unlock_irqrestore(&tport->tp_lock, flags); 1517 } 1518 1519 return status; 1520 } 1521 1522 1523 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 1524 __u16 moduleid, __u16 value, __u8 *data, int size) 1525 { 1526 int status; 1527 1528 status = usb_control_msg(tdev->td_serial->dev, 1529 usb_sndctrlpipe(tdev->td_serial->dev, 0), command, 1530 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 1531 value, moduleid, data, size, 1000); 1532 1533 if (status == size) 1534 status = 0; 1535 1536 if (status > 0) 1537 status = -ECOMM; 1538 1539 return status; 1540 } 1541 1542 1543 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 1544 __u16 moduleid, __u16 value, __u8 *data, int size) 1545 { 1546 int status; 1547 1548 status = usb_control_msg(tdev->td_serial->dev, 1549 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command, 1550 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 1551 value, moduleid, data, size, 1000); 1552 1553 if (status == size) 1554 status = 0; 1555 1556 if (status > 0) 1557 status = -ECOMM; 1558 1559 return status; 1560 } 1561 1562 1563 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 1564 __u8 mask, __u8 byte) 1565 { 1566 int status; 1567 unsigned int size; 1568 struct ti_write_data_bytes *data; 1569 struct device *dev = &tdev->td_serial->dev->dev; 1570 1571 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", 1572 __func__, addr, mask, byte); 1573 1574 size = sizeof(struct ti_write_data_bytes) + 2; 1575 data = kmalloc(size, GFP_KERNEL); 1576 if (!data) { 1577 dev_err(dev, "%s - out of memory\n", __func__); 1578 return -ENOMEM; 1579 } 1580 1581 data->bAddrType = TI_RW_DATA_ADDR_XDATA; 1582 data->bDataType = TI_RW_DATA_BYTE; 1583 data->bDataCounter = 1; 1584 data->wBaseAddrHi = cpu_to_be16(addr>>16); 1585 data->wBaseAddrLo = cpu_to_be16(addr); 1586 data->bData[0] = mask; 1587 data->bData[1] = byte; 1588 1589 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0, 1590 (__u8 *)data, size); 1591 1592 if (status < 0) 1593 dev_err(dev, "%s - failed, %d\n", __func__, status); 1594 1595 kfree(data); 1596 1597 return status; 1598 } 1599 1600 static int ti_do_download(struct usb_device *dev, int pipe, 1601 u8 *buffer, int size) 1602 { 1603 int pos; 1604 u8 cs = 0; 1605 int done; 1606 struct ti_firmware_header *header; 1607 int status = 0; 1608 int len; 1609 1610 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++) 1611 cs = (__u8)(cs + buffer[pos]); 1612 1613 header = (struct ti_firmware_header *)buffer; 1614 header->wLength = cpu_to_le16((__u16)(size 1615 - sizeof(struct ti_firmware_header))); 1616 header->bCheckSum = cs; 1617 1618 dbg("%s - downloading firmware", __func__); 1619 for (pos = 0; pos < size; pos += done) { 1620 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE); 1621 status = usb_bulk_msg(dev, pipe, buffer + pos, len, 1622 &done, 1000); 1623 if (status) 1624 break; 1625 } 1626 return status; 1627 } 1628 1629 static int ti_download_firmware(struct ti_device *tdev) 1630 { 1631 int status; 1632 int buffer_size; 1633 __u8 *buffer; 1634 struct usb_device *dev = tdev->td_serial->dev; 1635 unsigned int pipe = usb_sndbulkpipe(dev, 1636 tdev->td_serial->port[0]->bulk_out_endpointAddress); 1637 const struct firmware *fw_p; 1638 char buf[32]; 1639 1640 /* try ID specific firmware first, then try generic firmware */ 1641 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor, 1642 dev->descriptor.idProduct); 1643 status = request_firmware(&fw_p, buf, &dev->dev); 1644 1645 if (status != 0) { 1646 buf[0] = '\0'; 1647 if (dev->descriptor.idVendor == MTS_VENDOR_ID) { 1648 switch (dev->descriptor.idProduct) { 1649 case MTS_CDMA_PRODUCT_ID: 1650 strcpy(buf, "mts_cdma.fw"); 1651 break; 1652 case MTS_GSM_PRODUCT_ID: 1653 strcpy(buf, "mts_gsm.fw"); 1654 break; 1655 case MTS_EDGE_PRODUCT_ID: 1656 strcpy(buf, "mts_edge.fw"); 1657 break; 1658 case MTS_MT9234MU_PRODUCT_ID: 1659 strcpy(buf, "mts_mt9234mu.fw"); 1660 break; 1661 case MTS_MT9234ZBA_PRODUCT_ID: 1662 strcpy(buf, "mts_mt9234zba.fw"); 1663 break; 1664 case MTS_MT9234ZBAOLD_PRODUCT_ID: 1665 strcpy(buf, "mts_mt9234zba.fw"); 1666 break; } 1667 } 1668 if (buf[0] == '\0') { 1669 if (tdev->td_is_3410) 1670 strcpy(buf, "ti_3410.fw"); 1671 else 1672 strcpy(buf, "ti_5052.fw"); 1673 } 1674 status = request_firmware(&fw_p, buf, &dev->dev); 1675 } 1676 if (status) { 1677 dev_err(&dev->dev, "%s - firmware not found\n", __func__); 1678 return -ENOENT; 1679 } 1680 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) { 1681 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size); 1682 release_firmware(fw_p); 1683 return -ENOENT; 1684 } 1685 1686 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header); 1687 buffer = kmalloc(buffer_size, GFP_KERNEL); 1688 if (buffer) { 1689 memcpy(buffer, fw_p->data, fw_p->size); 1690 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size); 1691 status = ti_do_download(dev, pipe, buffer, fw_p->size); 1692 kfree(buffer); 1693 } else { 1694 dbg("%s ENOMEM\n", __func__); 1695 status = -ENOMEM; 1696 } 1697 release_firmware(fw_p); 1698 if (status) { 1699 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", 1700 __func__, status); 1701 return status; 1702 } 1703 1704 dbg("%s - download successful", __func__); 1705 1706 return 0; 1707 } 1708