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[14+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 }; 184 185 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = { 186 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 187 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 188 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 189 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 190 }; 191 192 static struct usb_device_id ti_id_table_combined[18+2*TI_EXTRA_VID_PID_COUNT+1] = { 193 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 194 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 195 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) }, 196 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) }, 197 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) }, 198 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) }, 199 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) }, 200 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) }, 201 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) }, 202 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_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 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) }, 211 { } 212 }; 213 214 static struct usb_driver ti_usb_driver = { 215 .name = "ti_usb_3410_5052", 216 .probe = usb_serial_probe, 217 .disconnect = usb_serial_disconnect, 218 .id_table = ti_id_table_combined, 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 .id_table = ti_id_table_3410, 228 .num_ports = 1, 229 .attach = ti_startup, 230 .release = ti_release, 231 .open = ti_open, 232 .close = ti_close, 233 .write = ti_write, 234 .write_room = ti_write_room, 235 .chars_in_buffer = ti_chars_in_buffer, 236 .throttle = ti_throttle, 237 .unthrottle = ti_unthrottle, 238 .ioctl = ti_ioctl, 239 .set_termios = ti_set_termios, 240 .tiocmget = ti_tiocmget, 241 .tiocmset = ti_tiocmset, 242 .get_icount = ti_get_icount, 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 .id_table = ti_id_table_5052, 256 .num_ports = 2, 257 .attach = ti_startup, 258 .release = ti_release, 259 .open = ti_open, 260 .close = ti_close, 261 .write = ti_write, 262 .write_room = ti_write_room, 263 .chars_in_buffer = ti_chars_in_buffer, 264 .throttle = ti_throttle, 265 .unthrottle = ti_unthrottle, 266 .ioctl = ti_ioctl, 267 .set_termios = ti_set_termios, 268 .tiocmget = ti_tiocmget, 269 .tiocmset = ti_tiocmset, 270 .get_icount = ti_get_icount, 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 static struct usb_serial_driver * const serial_drivers[] = { 278 &ti_1port_device, &ti_2port_device, NULL 279 }; 280 281 /* Module */ 282 283 MODULE_AUTHOR(TI_DRIVER_AUTHOR); 284 MODULE_DESCRIPTION(TI_DRIVER_DESC); 285 MODULE_VERSION(TI_DRIVER_VERSION); 286 MODULE_LICENSE("GPL"); 287 288 MODULE_FIRMWARE("ti_3410.fw"); 289 MODULE_FIRMWARE("ti_5052.fw"); 290 MODULE_FIRMWARE("mts_cdma.fw"); 291 MODULE_FIRMWARE("mts_gsm.fw"); 292 MODULE_FIRMWARE("mts_edge.fw"); 293 MODULE_FIRMWARE("mts_mt9234mu.fw"); 294 MODULE_FIRMWARE("mts_mt9234zba.fw"); 295 296 module_param(debug, bool, S_IRUGO | S_IWUSR); 297 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes"); 298 299 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 300 MODULE_PARM_DESC(closing_wait, 301 "Maximum wait for data to drain in close, in .01 secs, default is 4000"); 302 303 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO); 304 MODULE_PARM_DESC(vendor_3410, 305 "Vendor ids for 3410 based devices, 1-5 short integers"); 306 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO); 307 MODULE_PARM_DESC(product_3410, 308 "Product ids for 3410 based devices, 1-5 short integers"); 309 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO); 310 MODULE_PARM_DESC(vendor_5052, 311 "Vendor ids for 5052 based devices, 1-5 short integers"); 312 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO); 313 MODULE_PARM_DESC(product_5052, 314 "Product ids for 5052 based devices, 1-5 short integers"); 315 316 MODULE_DEVICE_TABLE(usb, ti_id_table_combined); 317 318 319 /* Functions */ 320 321 static int __init ti_init(void) 322 { 323 int i, j, c; 324 int ret; 325 326 /* insert extra vendor and product ids */ 327 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1; 328 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1; 329 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) { 330 ti_id_table_3410[j].idVendor = vendor_3410[i]; 331 ti_id_table_3410[j].idProduct = product_3410[i]; 332 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 333 ti_id_table_combined[c].idVendor = vendor_3410[i]; 334 ti_id_table_combined[c].idProduct = product_3410[i]; 335 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 336 } 337 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1; 338 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) { 339 ti_id_table_5052[j].idVendor = vendor_5052[i]; 340 ti_id_table_5052[j].idProduct = product_5052[i]; 341 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 342 ti_id_table_combined[c].idVendor = vendor_5052[i]; 343 ti_id_table_combined[c].idProduct = product_5052[i]; 344 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 345 } 346 347 ret = usb_serial_register_drivers(&ti_usb_driver, serial_drivers); 348 if (ret == 0) 349 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":" 350 TI_DRIVER_DESC "\n"); 351 return ret; 352 } 353 354 355 static void __exit ti_exit(void) 356 { 357 usb_serial_deregister_drivers(&ti_usb_driver, serial_drivers); 358 } 359 360 361 module_init(ti_init); 362 module_exit(ti_exit); 363 364 365 static int ti_startup(struct usb_serial *serial) 366 { 367 struct ti_device *tdev; 368 struct ti_port *tport; 369 struct usb_device *dev = serial->dev; 370 int status; 371 int i; 372 373 374 dbg("%s - product 0x%4X, num configurations %d, configuration value %d", 375 __func__, le16_to_cpu(dev->descriptor.idProduct), 376 dev->descriptor.bNumConfigurations, 377 dev->actconfig->desc.bConfigurationValue); 378 379 /* create device structure */ 380 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL); 381 if (tdev == NULL) { 382 dev_err(&dev->dev, "%s - out of memory\n", __func__); 383 return -ENOMEM; 384 } 385 mutex_init(&tdev->td_open_close_lock); 386 tdev->td_serial = serial; 387 usb_set_serial_data(serial, tdev); 388 389 /* determine device type */ 390 if (usb_match_id(serial->interface, ti_id_table_3410)) 391 tdev->td_is_3410 = 1; 392 dbg("%s - device type is %s", __func__, 393 tdev->td_is_3410 ? "3410" : "5052"); 394 395 /* if we have only 1 configuration, download firmware */ 396 if (dev->descriptor.bNumConfigurations == 1) { 397 if ((status = ti_download_firmware(tdev)) != 0) 398 goto free_tdev; 399 400 /* 3410 must be reset, 5052 resets itself */ 401 if (tdev->td_is_3410) { 402 msleep_interruptible(100); 403 usb_reset_device(dev); 404 } 405 406 status = -ENODEV; 407 goto free_tdev; 408 } 409 410 /* the second configuration must be set */ 411 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) { 412 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG); 413 status = status ? status : -ENODEV; 414 goto free_tdev; 415 } 416 417 /* set up port structures */ 418 for (i = 0; i < serial->num_ports; ++i) { 419 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL); 420 if (tport == NULL) { 421 dev_err(&dev->dev, "%s - out of memory\n", __func__); 422 status = -ENOMEM; 423 goto free_tports; 424 } 425 spin_lock_init(&tport->tp_lock); 426 tport->tp_uart_base_addr = (i == 0 ? 427 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR); 428 tport->tp_closing_wait = closing_wait; 429 init_waitqueue_head(&tport->tp_msr_wait); 430 init_waitqueue_head(&tport->tp_write_wait); 431 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, 432 GFP_KERNEL)) { 433 dev_err(&dev->dev, "%s - out of memory\n", __func__); 434 kfree(tport); 435 status = -ENOMEM; 436 goto free_tports; 437 } 438 tport->tp_port = serial->port[i]; 439 tport->tp_tdev = tdev; 440 usb_set_serial_port_data(serial->port[i], tport); 441 tport->tp_uart_mode = 0; /* default is RS232 */ 442 } 443 444 return 0; 445 446 free_tports: 447 for (--i; i >= 0; --i) { 448 tport = usb_get_serial_port_data(serial->port[i]); 449 kfifo_free(&tport->write_fifo); 450 kfree(tport); 451 usb_set_serial_port_data(serial->port[i], NULL); 452 } 453 free_tdev: 454 kfree(tdev); 455 usb_set_serial_data(serial, NULL); 456 return status; 457 } 458 459 460 static void ti_release(struct usb_serial *serial) 461 { 462 int i; 463 struct ti_device *tdev = usb_get_serial_data(serial); 464 struct ti_port *tport; 465 466 dbg("%s", __func__); 467 468 for (i = 0; i < serial->num_ports; ++i) { 469 tport = usb_get_serial_port_data(serial->port[i]); 470 if (tport) { 471 kfifo_free(&tport->write_fifo); 472 kfree(tport); 473 } 474 } 475 476 kfree(tdev); 477 } 478 479 480 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port) 481 { 482 struct ti_port *tport = usb_get_serial_port_data(port); 483 struct ti_device *tdev; 484 struct usb_device *dev; 485 struct urb *urb; 486 int port_number; 487 int status; 488 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 489 TI_PIPE_TIMEOUT_ENABLE | 490 (TI_TRANSFER_TIMEOUT << 2)); 491 492 dbg("%s - port %d", __func__, port->number); 493 494 if (tport == NULL) 495 return -ENODEV; 496 497 dev = port->serial->dev; 498 tdev = tport->tp_tdev; 499 500 /* only one open on any port on a device at a time */ 501 if (mutex_lock_interruptible(&tdev->td_open_close_lock)) 502 return -ERESTARTSYS; 503 504 port_number = port->number - port->serial->minor; 505 506 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount)); 507 508 tport->tp_msr = 0; 509 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR); 510 511 /* start interrupt urb the first time a port is opened on this device */ 512 if (tdev->td_open_port_count == 0) { 513 dbg("%s - start interrupt in urb", __func__); 514 urb = tdev->td_serial->port[0]->interrupt_in_urb; 515 if (!urb) { 516 dev_err(&port->dev, "%s - no interrupt urb\n", 517 __func__); 518 status = -EINVAL; 519 goto release_lock; 520 } 521 urb->context = tdev; 522 status = usb_submit_urb(urb, GFP_KERNEL); 523 if (status) { 524 dev_err(&port->dev, 525 "%s - submit interrupt urb failed, %d\n", 526 __func__, status); 527 goto release_lock; 528 } 529 } 530 531 if (tty) 532 ti_set_termios(tty, port, tty->termios); 533 534 dbg("%s - sending TI_OPEN_PORT", __func__); 535 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 536 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 537 if (status) { 538 dev_err(&port->dev, "%s - cannot send open command, %d\n", 539 __func__, status); 540 goto unlink_int_urb; 541 } 542 543 dbg("%s - sending TI_START_PORT", __func__); 544 status = ti_command_out_sync(tdev, TI_START_PORT, 545 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 546 if (status) { 547 dev_err(&port->dev, "%s - cannot send start command, %d\n", 548 __func__, status); 549 goto unlink_int_urb; 550 } 551 552 dbg("%s - sending TI_PURGE_PORT", __func__); 553 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 554 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0); 555 if (status) { 556 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", 557 __func__, status); 558 goto unlink_int_urb; 559 } 560 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 561 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0); 562 if (status) { 563 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", 564 __func__, status); 565 goto unlink_int_urb; 566 } 567 568 /* reset the data toggle on the bulk endpoints to work around bug in 569 * host controllers where things get out of sync some times */ 570 usb_clear_halt(dev, port->write_urb->pipe); 571 usb_clear_halt(dev, port->read_urb->pipe); 572 573 if (tty) 574 ti_set_termios(tty, port, tty->termios); 575 576 dbg("%s - sending TI_OPEN_PORT (2)", __func__); 577 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 578 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 579 if (status) { 580 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", 581 __func__, status); 582 goto unlink_int_urb; 583 } 584 585 dbg("%s - sending TI_START_PORT (2)", __func__); 586 status = ti_command_out_sync(tdev, TI_START_PORT, 587 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 588 if (status) { 589 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", 590 __func__, status); 591 goto unlink_int_urb; 592 } 593 594 /* start read urb */ 595 dbg("%s - start read urb", __func__); 596 urb = port->read_urb; 597 if (!urb) { 598 dev_err(&port->dev, "%s - no read urb\n", __func__); 599 status = -EINVAL; 600 goto unlink_int_urb; 601 } 602 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 603 urb->context = tport; 604 status = usb_submit_urb(urb, GFP_KERNEL); 605 if (status) { 606 dev_err(&port->dev, "%s - submit read urb failed, %d\n", 607 __func__, status); 608 goto unlink_int_urb; 609 } 610 611 tport->tp_is_open = 1; 612 ++tdev->td_open_port_count; 613 614 goto release_lock; 615 616 unlink_int_urb: 617 if (tdev->td_open_port_count == 0) 618 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 619 release_lock: 620 mutex_unlock(&tdev->td_open_close_lock); 621 dbg("%s - exit %d", __func__, status); 622 return status; 623 } 624 625 626 static void ti_close(struct usb_serial_port *port) 627 { 628 struct ti_device *tdev; 629 struct ti_port *tport; 630 int port_number; 631 int status; 632 int do_unlock; 633 634 dbg("%s - port %d", __func__, port->number); 635 636 tdev = usb_get_serial_data(port->serial); 637 tport = usb_get_serial_port_data(port); 638 if (tdev == NULL || tport == NULL) 639 return; 640 641 tport->tp_is_open = 0; 642 643 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1); 644 645 usb_kill_urb(port->read_urb); 646 usb_kill_urb(port->write_urb); 647 tport->tp_write_urb_in_use = 0; 648 649 port_number = port->number - port->serial->minor; 650 651 dbg("%s - sending TI_CLOSE_PORT", __func__); 652 status = ti_command_out_sync(tdev, TI_CLOSE_PORT, 653 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 654 if (status) 655 dev_err(&port->dev, 656 "%s - cannot send close port command, %d\n" 657 , __func__, status); 658 659 /* if mutex_lock is interrupted, continue anyway */ 660 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock); 661 --tport->tp_tdev->td_open_port_count; 662 if (tport->tp_tdev->td_open_port_count <= 0) { 663 /* last port is closed, shut down interrupt urb */ 664 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 665 tport->tp_tdev->td_open_port_count = 0; 666 } 667 if (do_unlock) 668 mutex_unlock(&tdev->td_open_close_lock); 669 670 dbg("%s - exit", __func__); 671 } 672 673 674 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port, 675 const unsigned char *data, int count) 676 { 677 struct ti_port *tport = usb_get_serial_port_data(port); 678 679 dbg("%s - port %d", __func__, port->number); 680 681 if (count == 0) { 682 dbg("%s - write request of 0 bytes", __func__); 683 return 0; 684 } 685 686 if (tport == NULL || !tport->tp_is_open) 687 return -ENODEV; 688 689 count = kfifo_in_locked(&tport->write_fifo, data, count, 690 &tport->tp_lock); 691 ti_send(tport); 692 693 return count; 694 } 695 696 697 static int ti_write_room(struct tty_struct *tty) 698 { 699 struct usb_serial_port *port = tty->driver_data; 700 struct ti_port *tport = usb_get_serial_port_data(port); 701 int room = 0; 702 unsigned long flags; 703 704 dbg("%s - port %d", __func__, port->number); 705 706 if (tport == NULL) 707 return 0; 708 709 spin_lock_irqsave(&tport->tp_lock, flags); 710 room = kfifo_avail(&tport->write_fifo); 711 spin_unlock_irqrestore(&tport->tp_lock, flags); 712 713 dbg("%s - returns %d", __func__, room); 714 return room; 715 } 716 717 718 static int ti_chars_in_buffer(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 chars = 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 chars = kfifo_len(&tport->write_fifo); 732 spin_unlock_irqrestore(&tport->tp_lock, flags); 733 734 dbg("%s - returns %d", __func__, chars); 735 return chars; 736 } 737 738 739 static void ti_throttle(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); 743 744 dbg("%s - port %d", __func__, port->number); 745 746 if (tport == NULL) 747 return; 748 749 if (I_IXOFF(tty) || C_CRTSCTS(tty)) 750 ti_stop_read(tport, tty); 751 752 } 753 754 755 static void ti_unthrottle(struct tty_struct *tty) 756 { 757 struct usb_serial_port *port = tty->driver_data; 758 struct ti_port *tport = usb_get_serial_port_data(port); 759 int status; 760 761 dbg("%s - port %d", __func__, port->number); 762 763 if (tport == NULL) 764 return; 765 766 if (I_IXOFF(tty) || C_CRTSCTS(tty)) { 767 status = ti_restart_read(tport, tty); 768 if (status) 769 dev_err(&port->dev, "%s - cannot restart read, %d\n", 770 __func__, status); 771 } 772 } 773 774 static int ti_get_icount(struct tty_struct *tty, 775 struct serial_icounter_struct *icount) 776 { 777 struct usb_serial_port *port = tty->driver_data; 778 struct ti_port *tport = usb_get_serial_port_data(port); 779 struct async_icount cnow = tport->tp_icount; 780 781 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", 782 __func__, port->number, 783 cnow.rx, cnow.tx); 784 785 icount->cts = cnow.cts; 786 icount->dsr = cnow.dsr; 787 icount->rng = cnow.rng; 788 icount->dcd = cnow.dcd; 789 icount->rx = cnow.rx; 790 icount->tx = cnow.tx; 791 icount->frame = cnow.frame; 792 icount->overrun = cnow.overrun; 793 icount->parity = cnow.parity; 794 icount->brk = cnow.brk; 795 icount->buf_overrun = cnow.buf_overrun; 796 797 return 0; 798 } 799 800 static int ti_ioctl(struct tty_struct *tty, 801 unsigned int cmd, unsigned long arg) 802 { 803 struct usb_serial_port *port = tty->driver_data; 804 struct ti_port *tport = usb_get_serial_port_data(port); 805 struct async_icount cnow; 806 struct async_icount cprev; 807 808 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd); 809 810 if (tport == NULL) 811 return -ENODEV; 812 813 switch (cmd) { 814 case TIOCGSERIAL: 815 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number); 816 return ti_get_serial_info(tport, 817 (struct serial_struct __user *)arg); 818 case TIOCSSERIAL: 819 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number); 820 return ti_set_serial_info(tty, tport, 821 (struct serial_struct __user *)arg); 822 case TIOCMIWAIT: 823 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number); 824 cprev = tport->tp_icount; 825 while (1) { 826 interruptible_sleep_on(&tport->tp_msr_wait); 827 if (signal_pending(current)) 828 return -ERESTARTSYS; 829 cnow = tport->tp_icount; 830 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 831 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 832 return -EIO; /* no change => error */ 833 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 834 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 835 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 836 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) 837 return 0; 838 cprev = cnow; 839 } 840 break; 841 } 842 return -ENOIOCTLCMD; 843 } 844 845 846 static void ti_set_termios(struct tty_struct *tty, 847 struct usb_serial_port *port, struct ktermios *old_termios) 848 { 849 struct ti_port *tport = usb_get_serial_port_data(port); 850 struct ti_uart_config *config; 851 tcflag_t cflag, iflag; 852 int baud; 853 int status; 854 int port_number = port->number - port->serial->minor; 855 unsigned int mcr; 856 857 dbg("%s - port %d", __func__, port->number); 858 859 cflag = tty->termios->c_cflag; 860 iflag = tty->termios->c_iflag; 861 862 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag); 863 dbg("%s - old clfag %08x, old iflag %08x", __func__, 864 old_termios->c_cflag, old_termios->c_iflag); 865 866 if (tport == NULL) 867 return; 868 869 config = kmalloc(sizeof(*config), GFP_KERNEL); 870 if (!config) { 871 dev_err(&port->dev, "%s - out of memory\n", __func__); 872 return; 873 } 874 875 config->wFlags = 0; 876 877 /* these flags must be set */ 878 config->wFlags |= TI_UART_ENABLE_MS_INTS; 879 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA; 880 config->bUartMode = (__u8)(tport->tp_uart_mode); 881 882 switch (cflag & CSIZE) { 883 case CS5: 884 config->bDataBits = TI_UART_5_DATA_BITS; 885 break; 886 case CS6: 887 config->bDataBits = TI_UART_6_DATA_BITS; 888 break; 889 case CS7: 890 config->bDataBits = TI_UART_7_DATA_BITS; 891 break; 892 default: 893 case CS8: 894 config->bDataBits = TI_UART_8_DATA_BITS; 895 break; 896 } 897 898 /* CMSPAR isn't supported by this driver */ 899 tty->termios->c_cflag &= ~CMSPAR; 900 901 if (cflag & PARENB) { 902 if (cflag & PARODD) { 903 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 904 config->bParity = TI_UART_ODD_PARITY; 905 } else { 906 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 907 config->bParity = TI_UART_EVEN_PARITY; 908 } 909 } else { 910 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING; 911 config->bParity = TI_UART_NO_PARITY; 912 } 913 914 if (cflag & CSTOPB) 915 config->bStopBits = TI_UART_2_STOP_BITS; 916 else 917 config->bStopBits = TI_UART_1_STOP_BITS; 918 919 if (cflag & CRTSCTS) { 920 /* RTS flow control must be off to drop RTS for baud rate B0 */ 921 if ((cflag & CBAUD) != B0) 922 config->wFlags |= TI_UART_ENABLE_RTS_IN; 923 config->wFlags |= TI_UART_ENABLE_CTS_OUT; 924 } else { 925 tty->hw_stopped = 0; 926 ti_restart_read(tport, tty); 927 } 928 929 if (I_IXOFF(tty) || I_IXON(tty)) { 930 config->cXon = START_CHAR(tty); 931 config->cXoff = STOP_CHAR(tty); 932 933 if (I_IXOFF(tty)) 934 config->wFlags |= TI_UART_ENABLE_X_IN; 935 else 936 ti_restart_read(tport, tty); 937 938 if (I_IXON(tty)) 939 config->wFlags |= TI_UART_ENABLE_X_OUT; 940 } 941 942 baud = tty_get_baud_rate(tty); 943 if (!baud) 944 baud = 9600; 945 if (tport->tp_tdev->td_is_3410) 946 config->wBaudRate = (__u16)((923077 + baud/2) / baud); 947 else 948 config->wBaudRate = (__u16)((461538 + baud/2) / baud); 949 950 /* FIXME: Should calculate resulting baud here and report it back */ 951 if ((cflag & CBAUD) != B0) 952 tty_encode_baud_rate(tty, baud, baud); 953 954 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d", 955 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode); 956 957 cpu_to_be16s(&config->wBaudRate); 958 cpu_to_be16s(&config->wFlags); 959 960 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG, 961 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config, 962 sizeof(*config)); 963 if (status) 964 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", 965 __func__, port_number, status); 966 967 /* SET_CONFIG asserts RTS and DTR, reset them correctly */ 968 mcr = tport->tp_shadow_mcr; 969 /* if baud rate is B0, clear RTS and DTR */ 970 if ((cflag & CBAUD) == B0) 971 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS); 972 status = ti_set_mcr(tport, mcr); 973 if (status) 974 dev_err(&port->dev, 975 "%s - cannot set modem control on port %d, %d\n", 976 __func__, port_number, status); 977 978 kfree(config); 979 } 980 981 982 static int ti_tiocmget(struct tty_struct *tty) 983 { 984 struct usb_serial_port *port = tty->driver_data; 985 struct ti_port *tport = usb_get_serial_port_data(port); 986 unsigned int result; 987 unsigned int msr; 988 unsigned int mcr; 989 unsigned long flags; 990 991 dbg("%s - port %d", __func__, port->number); 992 993 if (tport == NULL) 994 return -ENODEV; 995 996 spin_lock_irqsave(&tport->tp_lock, flags); 997 msr = tport->tp_msr; 998 mcr = tport->tp_shadow_mcr; 999 spin_unlock_irqrestore(&tport->tp_lock, flags); 1000 1001 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0) 1002 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0) 1003 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0) 1004 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0) 1005 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0) 1006 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0) 1007 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0); 1008 1009 dbg("%s - 0x%04X", __func__, result); 1010 1011 return result; 1012 } 1013 1014 1015 static int ti_tiocmset(struct tty_struct *tty, 1016 unsigned int set, unsigned int clear) 1017 { 1018 struct usb_serial_port *port = tty->driver_data; 1019 struct ti_port *tport = usb_get_serial_port_data(port); 1020 unsigned int mcr; 1021 unsigned long flags; 1022 1023 dbg("%s - port %d", __func__, port->number); 1024 1025 if (tport == NULL) 1026 return -ENODEV; 1027 1028 spin_lock_irqsave(&tport->tp_lock, flags); 1029 mcr = tport->tp_shadow_mcr; 1030 1031 if (set & TIOCM_RTS) 1032 mcr |= TI_MCR_RTS; 1033 if (set & TIOCM_DTR) 1034 mcr |= TI_MCR_DTR; 1035 if (set & TIOCM_LOOP) 1036 mcr |= TI_MCR_LOOP; 1037 1038 if (clear & TIOCM_RTS) 1039 mcr &= ~TI_MCR_RTS; 1040 if (clear & TIOCM_DTR) 1041 mcr &= ~TI_MCR_DTR; 1042 if (clear & TIOCM_LOOP) 1043 mcr &= ~TI_MCR_LOOP; 1044 spin_unlock_irqrestore(&tport->tp_lock, flags); 1045 1046 return ti_set_mcr(tport, mcr); 1047 } 1048 1049 1050 static void ti_break(struct tty_struct *tty, int break_state) 1051 { 1052 struct usb_serial_port *port = tty->driver_data; 1053 struct ti_port *tport = usb_get_serial_port_data(port); 1054 int status; 1055 1056 dbg("%s - state = %d", __func__, break_state); 1057 1058 if (tport == NULL) 1059 return; 1060 1061 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0); 1062 1063 status = ti_write_byte(tport->tp_tdev, 1064 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR, 1065 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0); 1066 1067 if (status) 1068 dbg("%s - error setting break, %d", __func__, status); 1069 } 1070 1071 1072 static void ti_interrupt_callback(struct urb *urb) 1073 { 1074 struct ti_device *tdev = urb->context; 1075 struct usb_serial_port *port; 1076 struct usb_serial *serial = tdev->td_serial; 1077 struct ti_port *tport; 1078 struct device *dev = &urb->dev->dev; 1079 unsigned char *data = urb->transfer_buffer; 1080 int length = urb->actual_length; 1081 int port_number; 1082 int function; 1083 int status = urb->status; 1084 int retval; 1085 __u8 msr; 1086 1087 dbg("%s", __func__); 1088 1089 switch (status) { 1090 case 0: 1091 break; 1092 case -ECONNRESET: 1093 case -ENOENT: 1094 case -ESHUTDOWN: 1095 dbg("%s - urb shutting down, %d", __func__, status); 1096 tdev->td_urb_error = 1; 1097 return; 1098 default: 1099 dev_err(dev, "%s - nonzero urb status, %d\n", 1100 __func__, status); 1101 tdev->td_urb_error = 1; 1102 goto exit; 1103 } 1104 1105 if (length != 2) { 1106 dbg("%s - bad packet size, %d", __func__, length); 1107 goto exit; 1108 } 1109 1110 if (data[0] == TI_CODE_HARDWARE_ERROR) { 1111 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]); 1112 goto exit; 1113 } 1114 1115 port_number = TI_GET_PORT_FROM_CODE(data[0]); 1116 function = TI_GET_FUNC_FROM_CODE(data[0]); 1117 1118 dbg("%s - port_number %d, function %d, data 0x%02X", 1119 __func__, port_number, function, data[1]); 1120 1121 if (port_number >= serial->num_ports) { 1122 dev_err(dev, "%s - bad port number, %d\n", 1123 __func__, port_number); 1124 goto exit; 1125 } 1126 1127 port = serial->port[port_number]; 1128 1129 tport = usb_get_serial_port_data(port); 1130 if (!tport) 1131 goto exit; 1132 1133 switch (function) { 1134 case TI_CODE_DATA_ERROR: 1135 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", 1136 __func__, port_number, data[1]); 1137 break; 1138 1139 case TI_CODE_MODEM_STATUS: 1140 msr = data[1]; 1141 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr); 1142 ti_handle_new_msr(tport, msr); 1143 break; 1144 1145 default: 1146 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", 1147 __func__, data[1]); 1148 break; 1149 } 1150 1151 exit: 1152 retval = usb_submit_urb(urb, GFP_ATOMIC); 1153 if (retval) 1154 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", 1155 __func__, retval); 1156 } 1157 1158 1159 static void ti_bulk_in_callback(struct urb *urb) 1160 { 1161 struct ti_port *tport = urb->context; 1162 struct usb_serial_port *port = tport->tp_port; 1163 struct device *dev = &urb->dev->dev; 1164 int status = urb->status; 1165 int retval = 0; 1166 struct tty_struct *tty; 1167 1168 dbg("%s", __func__); 1169 1170 switch (status) { 1171 case 0: 1172 break; 1173 case -ECONNRESET: 1174 case -ENOENT: 1175 case -ESHUTDOWN: 1176 dbg("%s - urb shutting down, %d", __func__, status); 1177 tport->tp_tdev->td_urb_error = 1; 1178 wake_up_interruptible(&tport->tp_write_wait); 1179 return; 1180 default: 1181 dev_err(dev, "%s - nonzero urb status, %d\n", 1182 __func__, status); 1183 tport->tp_tdev->td_urb_error = 1; 1184 wake_up_interruptible(&tport->tp_write_wait); 1185 } 1186 1187 if (status == -EPIPE) 1188 goto exit; 1189 1190 if (status) { 1191 dev_err(dev, "%s - stopping read!\n", __func__); 1192 return; 1193 } 1194 1195 tty = tty_port_tty_get(&port->port); 1196 if (tty) { 1197 if (urb->actual_length) { 1198 usb_serial_debug_data(debug, dev, __func__, 1199 urb->actual_length, urb->transfer_buffer); 1200 1201 if (!tport->tp_is_open) 1202 dbg("%s - port closed, dropping data", 1203 __func__); 1204 else 1205 ti_recv(&urb->dev->dev, tty, 1206 urb->transfer_buffer, 1207 urb->actual_length); 1208 spin_lock(&tport->tp_lock); 1209 tport->tp_icount.rx += urb->actual_length; 1210 spin_unlock(&tport->tp_lock); 1211 } 1212 tty_kref_put(tty); 1213 } 1214 1215 exit: 1216 /* continue to read unless stopping */ 1217 spin_lock(&tport->tp_lock); 1218 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1219 retval = usb_submit_urb(urb, GFP_ATOMIC); 1220 else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) 1221 tport->tp_read_urb_state = TI_READ_URB_STOPPED; 1222 1223 spin_unlock(&tport->tp_lock); 1224 if (retval) 1225 dev_err(dev, "%s - resubmit read urb failed, %d\n", 1226 __func__, retval); 1227 } 1228 1229 1230 static void ti_bulk_out_callback(struct urb *urb) 1231 { 1232 struct ti_port *tport = urb->context; 1233 struct usb_serial_port *port = tport->tp_port; 1234 int status = urb->status; 1235 1236 dbg("%s - port %d", __func__, port->number); 1237 1238 tport->tp_write_urb_in_use = 0; 1239 1240 switch (status) { 1241 case 0: 1242 break; 1243 case -ECONNRESET: 1244 case -ENOENT: 1245 case -ESHUTDOWN: 1246 dbg("%s - urb shutting down, %d", __func__, status); 1247 tport->tp_tdev->td_urb_error = 1; 1248 wake_up_interruptible(&tport->tp_write_wait); 1249 return; 1250 default: 1251 dev_err_console(port, "%s - nonzero urb status, %d\n", 1252 __func__, status); 1253 tport->tp_tdev->td_urb_error = 1; 1254 wake_up_interruptible(&tport->tp_write_wait); 1255 } 1256 1257 /* send any buffered data */ 1258 ti_send(tport); 1259 } 1260 1261 1262 static void ti_recv(struct device *dev, struct tty_struct *tty, 1263 unsigned char *data, int length) 1264 { 1265 int cnt; 1266 1267 do { 1268 cnt = tty_insert_flip_string(tty, data, length); 1269 if (cnt < length) { 1270 dev_err(dev, "%s - dropping data, %d bytes lost\n", 1271 __func__, length - cnt); 1272 if (cnt == 0) 1273 break; 1274 } 1275 tty_flip_buffer_push(tty); 1276 data += cnt; 1277 length -= cnt; 1278 } while (length > 0); 1279 1280 } 1281 1282 1283 static void ti_send(struct ti_port *tport) 1284 { 1285 int count, result; 1286 struct usb_serial_port *port = tport->tp_port; 1287 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */ 1288 unsigned long flags; 1289 1290 1291 dbg("%s - port %d", __func__, port->number); 1292 1293 spin_lock_irqsave(&tport->tp_lock, flags); 1294 1295 if (tport->tp_write_urb_in_use) 1296 goto unlock; 1297 1298 count = kfifo_out(&tport->write_fifo, 1299 port->write_urb->transfer_buffer, 1300 port->bulk_out_size); 1301 1302 if (count == 0) 1303 goto unlock; 1304 1305 tport->tp_write_urb_in_use = 1; 1306 1307 spin_unlock_irqrestore(&tport->tp_lock, flags); 1308 1309 usb_serial_debug_data(debug, &port->dev, __func__, count, 1310 port->write_urb->transfer_buffer); 1311 1312 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 1313 usb_sndbulkpipe(port->serial->dev, 1314 port->bulk_out_endpointAddress), 1315 port->write_urb->transfer_buffer, count, 1316 ti_bulk_out_callback, tport); 1317 1318 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 1319 if (result) { 1320 dev_err_console(port, "%s - submit write urb failed, %d\n", 1321 __func__, result); 1322 tport->tp_write_urb_in_use = 0; 1323 /* TODO: reschedule ti_send */ 1324 } else { 1325 spin_lock_irqsave(&tport->tp_lock, flags); 1326 tport->tp_icount.tx += count; 1327 spin_unlock_irqrestore(&tport->tp_lock, flags); 1328 } 1329 1330 /* more room in the buffer for new writes, wakeup */ 1331 if (tty) 1332 tty_wakeup(tty); 1333 tty_kref_put(tty); 1334 wake_up_interruptible(&tport->tp_write_wait); 1335 return; 1336 unlock: 1337 spin_unlock_irqrestore(&tport->tp_lock, flags); 1338 tty_kref_put(tty); 1339 return; 1340 } 1341 1342 1343 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr) 1344 { 1345 unsigned long flags; 1346 int status; 1347 1348 status = ti_write_byte(tport->tp_tdev, 1349 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR, 1350 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr); 1351 1352 spin_lock_irqsave(&tport->tp_lock, flags); 1353 if (!status) 1354 tport->tp_shadow_mcr = mcr; 1355 spin_unlock_irqrestore(&tport->tp_lock, flags); 1356 1357 return status; 1358 } 1359 1360 1361 static int ti_get_lsr(struct ti_port *tport) 1362 { 1363 int size, status; 1364 struct ti_device *tdev = tport->tp_tdev; 1365 struct usb_serial_port *port = tport->tp_port; 1366 int port_number = port->number - port->serial->minor; 1367 struct ti_port_status *data; 1368 1369 dbg("%s - port %d", __func__, port->number); 1370 1371 size = sizeof(struct ti_port_status); 1372 data = kmalloc(size, GFP_KERNEL); 1373 if (!data) { 1374 dev_err(&port->dev, "%s - out of memory\n", __func__); 1375 return -ENOMEM; 1376 } 1377 1378 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS, 1379 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size); 1380 if (status) { 1381 dev_err(&port->dev, 1382 "%s - get port status command failed, %d\n", 1383 __func__, status); 1384 goto free_data; 1385 } 1386 1387 dbg("%s - lsr 0x%02X", __func__, data->bLSR); 1388 1389 tport->tp_lsr = data->bLSR; 1390 1391 free_data: 1392 kfree(data); 1393 return status; 1394 } 1395 1396 1397 static int ti_get_serial_info(struct ti_port *tport, 1398 struct serial_struct __user *ret_arg) 1399 { 1400 struct usb_serial_port *port = tport->tp_port; 1401 struct serial_struct ret_serial; 1402 1403 if (!ret_arg) 1404 return -EFAULT; 1405 1406 memset(&ret_serial, 0, sizeof(ret_serial)); 1407 1408 ret_serial.type = PORT_16550A; 1409 ret_serial.line = port->serial->minor; 1410 ret_serial.port = port->number - port->serial->minor; 1411 ret_serial.flags = tport->tp_flags; 1412 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE; 1413 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800; 1414 ret_serial.closing_wait = tport->tp_closing_wait; 1415 1416 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg))) 1417 return -EFAULT; 1418 1419 return 0; 1420 } 1421 1422 1423 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport, 1424 struct serial_struct __user *new_arg) 1425 { 1426 struct serial_struct new_serial; 1427 1428 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial))) 1429 return -EFAULT; 1430 1431 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS; 1432 tport->tp_closing_wait = new_serial.closing_wait; 1433 1434 return 0; 1435 } 1436 1437 1438 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr) 1439 { 1440 struct async_icount *icount; 1441 struct tty_struct *tty; 1442 unsigned long flags; 1443 1444 dbg("%s - msr 0x%02X", __func__, msr); 1445 1446 if (msr & TI_MSR_DELTA_MASK) { 1447 spin_lock_irqsave(&tport->tp_lock, flags); 1448 icount = &tport->tp_icount; 1449 if (msr & TI_MSR_DELTA_CTS) 1450 icount->cts++; 1451 if (msr & TI_MSR_DELTA_DSR) 1452 icount->dsr++; 1453 if (msr & TI_MSR_DELTA_CD) 1454 icount->dcd++; 1455 if (msr & TI_MSR_DELTA_RI) 1456 icount->rng++; 1457 wake_up_interruptible(&tport->tp_msr_wait); 1458 spin_unlock_irqrestore(&tport->tp_lock, flags); 1459 } 1460 1461 tport->tp_msr = msr & TI_MSR_MASK; 1462 1463 /* handle CTS flow control */ 1464 tty = tty_port_tty_get(&tport->tp_port->port); 1465 if (tty && C_CRTSCTS(tty)) { 1466 if (msr & TI_MSR_CTS) { 1467 tty->hw_stopped = 0; 1468 tty_wakeup(tty); 1469 } else { 1470 tty->hw_stopped = 1; 1471 } 1472 } 1473 tty_kref_put(tty); 1474 } 1475 1476 1477 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush) 1478 { 1479 struct ti_device *tdev = tport->tp_tdev; 1480 struct usb_serial_port *port = tport->tp_port; 1481 wait_queue_t wait; 1482 1483 dbg("%s - port %d", __func__, port->number); 1484 1485 spin_lock_irq(&tport->tp_lock); 1486 1487 /* wait for data to drain from the buffer */ 1488 tdev->td_urb_error = 0; 1489 init_waitqueue_entry(&wait, current); 1490 add_wait_queue(&tport->tp_write_wait, &wait); 1491 for (;;) { 1492 set_current_state(TASK_INTERRUPTIBLE); 1493 if (kfifo_len(&tport->write_fifo) == 0 1494 || timeout == 0 || signal_pending(current) 1495 || tdev->td_urb_error 1496 || port->serial->disconnected) /* disconnect */ 1497 break; 1498 spin_unlock_irq(&tport->tp_lock); 1499 timeout = schedule_timeout(timeout); 1500 spin_lock_irq(&tport->tp_lock); 1501 } 1502 set_current_state(TASK_RUNNING); 1503 remove_wait_queue(&tport->tp_write_wait, &wait); 1504 1505 /* flush any remaining data in the buffer */ 1506 if (flush) 1507 kfifo_reset_out(&tport->write_fifo); 1508 1509 spin_unlock_irq(&tport->tp_lock); 1510 1511 mutex_lock(&port->serial->disc_mutex); 1512 /* wait for data to drain from the device */ 1513 /* wait for empty tx register, plus 20 ms */ 1514 timeout += jiffies; 1515 tport->tp_lsr &= ~TI_LSR_TX_EMPTY; 1516 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 1517 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error 1518 && !port->serial->disconnected) { 1519 if (ti_get_lsr(tport)) 1520 break; 1521 mutex_unlock(&port->serial->disc_mutex); 1522 msleep_interruptible(20); 1523 mutex_lock(&port->serial->disc_mutex); 1524 } 1525 mutex_unlock(&port->serial->disc_mutex); 1526 } 1527 1528 1529 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty) 1530 { 1531 unsigned long flags; 1532 1533 spin_lock_irqsave(&tport->tp_lock, flags); 1534 1535 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1536 tport->tp_read_urb_state = TI_READ_URB_STOPPING; 1537 1538 spin_unlock_irqrestore(&tport->tp_lock, flags); 1539 } 1540 1541 1542 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty) 1543 { 1544 struct urb *urb; 1545 int status = 0; 1546 unsigned long flags; 1547 1548 spin_lock_irqsave(&tport->tp_lock, flags); 1549 1550 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) { 1551 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1552 urb = tport->tp_port->read_urb; 1553 spin_unlock_irqrestore(&tport->tp_lock, flags); 1554 urb->context = tport; 1555 status = usb_submit_urb(urb, GFP_KERNEL); 1556 } else { 1557 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1558 spin_unlock_irqrestore(&tport->tp_lock, flags); 1559 } 1560 1561 return status; 1562 } 1563 1564 1565 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 1566 __u16 moduleid, __u16 value, __u8 *data, int size) 1567 { 1568 int status; 1569 1570 status = usb_control_msg(tdev->td_serial->dev, 1571 usb_sndctrlpipe(tdev->td_serial->dev, 0), command, 1572 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 1573 value, moduleid, data, size, 1000); 1574 1575 if (status == size) 1576 status = 0; 1577 1578 if (status > 0) 1579 status = -ECOMM; 1580 1581 return status; 1582 } 1583 1584 1585 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 1586 __u16 moduleid, __u16 value, __u8 *data, int size) 1587 { 1588 int status; 1589 1590 status = usb_control_msg(tdev->td_serial->dev, 1591 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command, 1592 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 1593 value, moduleid, data, size, 1000); 1594 1595 if (status == size) 1596 status = 0; 1597 1598 if (status > 0) 1599 status = -ECOMM; 1600 1601 return status; 1602 } 1603 1604 1605 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 1606 __u8 mask, __u8 byte) 1607 { 1608 int status; 1609 unsigned int size; 1610 struct ti_write_data_bytes *data; 1611 struct device *dev = &tdev->td_serial->dev->dev; 1612 1613 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", 1614 __func__, addr, mask, byte); 1615 1616 size = sizeof(struct ti_write_data_bytes) + 2; 1617 data = kmalloc(size, GFP_KERNEL); 1618 if (!data) { 1619 dev_err(dev, "%s - out of memory\n", __func__); 1620 return -ENOMEM; 1621 } 1622 1623 data->bAddrType = TI_RW_DATA_ADDR_XDATA; 1624 data->bDataType = TI_RW_DATA_BYTE; 1625 data->bDataCounter = 1; 1626 data->wBaseAddrHi = cpu_to_be16(addr>>16); 1627 data->wBaseAddrLo = cpu_to_be16(addr); 1628 data->bData[0] = mask; 1629 data->bData[1] = byte; 1630 1631 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0, 1632 (__u8 *)data, size); 1633 1634 if (status < 0) 1635 dev_err(dev, "%s - failed, %d\n", __func__, status); 1636 1637 kfree(data); 1638 1639 return status; 1640 } 1641 1642 static int ti_do_download(struct usb_device *dev, int pipe, 1643 u8 *buffer, int size) 1644 { 1645 int pos; 1646 u8 cs = 0; 1647 int done; 1648 struct ti_firmware_header *header; 1649 int status = 0; 1650 int len; 1651 1652 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++) 1653 cs = (__u8)(cs + buffer[pos]); 1654 1655 header = (struct ti_firmware_header *)buffer; 1656 header->wLength = cpu_to_le16((__u16)(size 1657 - sizeof(struct ti_firmware_header))); 1658 header->bCheckSum = cs; 1659 1660 dbg("%s - downloading firmware", __func__); 1661 for (pos = 0; pos < size; pos += done) { 1662 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE); 1663 status = usb_bulk_msg(dev, pipe, buffer + pos, len, 1664 &done, 1000); 1665 if (status) 1666 break; 1667 } 1668 return status; 1669 } 1670 1671 static int ti_download_firmware(struct ti_device *tdev) 1672 { 1673 int status; 1674 int buffer_size; 1675 __u8 *buffer; 1676 struct usb_device *dev = tdev->td_serial->dev; 1677 unsigned int pipe = usb_sndbulkpipe(dev, 1678 tdev->td_serial->port[0]->bulk_out_endpointAddress); 1679 const struct firmware *fw_p; 1680 char buf[32]; 1681 1682 dbg("%s\n", __func__); 1683 /* try ID specific firmware first, then try generic firmware */ 1684 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor, 1685 dev->descriptor.idProduct); 1686 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) { 1687 buf[0] = '\0'; 1688 if (dev->descriptor.idVendor == MTS_VENDOR_ID) { 1689 switch (dev->descriptor.idProduct) { 1690 case MTS_CDMA_PRODUCT_ID: 1691 strcpy(buf, "mts_cdma.fw"); 1692 break; 1693 case MTS_GSM_PRODUCT_ID: 1694 strcpy(buf, "mts_gsm.fw"); 1695 break; 1696 case MTS_EDGE_PRODUCT_ID: 1697 strcpy(buf, "mts_edge.fw"); 1698 break; 1699 case MTS_MT9234MU_PRODUCT_ID: 1700 strcpy(buf, "mts_mt9234mu.fw"); 1701 break; 1702 case MTS_MT9234ZBA_PRODUCT_ID: 1703 strcpy(buf, "mts_mt9234zba.fw"); 1704 break; 1705 case MTS_MT9234ZBAOLD_PRODUCT_ID: 1706 strcpy(buf, "mts_mt9234zba.fw"); 1707 break; } 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 %zu\n", __func__, fw_p->size); 1723 release_firmware(fw_p); 1724 return -ENOENT; 1725 } 1726 1727 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header); 1728 buffer = kmalloc(buffer_size, GFP_KERNEL); 1729 if (buffer) { 1730 memcpy(buffer, fw_p->data, fw_p->size); 1731 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size); 1732 status = ti_do_download(dev, pipe, buffer, fw_p->size); 1733 kfree(buffer); 1734 } else { 1735 dbg("%s ENOMEM\n", __func__); 1736 status = -ENOMEM; 1737 } 1738 release_firmware(fw_p); 1739 if (status) { 1740 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", 1741 __func__, status); 1742 return status; 1743 } 1744 1745 dbg("%s - download successful", __func__); 1746 1747 return 0; 1748 } 1749