1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 15 * 16 * Clean ups from Moschip version and a few ioctl implementations by: 17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 18 * 19 * Originally based on drivers/usb/serial/io_edgeport.c which is: 20 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 22 * 23 */ 24 25 #include <linux/kernel.h> 26 #include <linux/errno.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/smp_lock.h> 30 #include <linux/tty.h> 31 #include <linux/tty_driver.h> 32 #include <linux/tty_flip.h> 33 #include <linux/module.h> 34 #include <linux/serial.h> 35 #include <linux/usb.h> 36 #include <linux/usb/serial.h> 37 #include <linux/uaccess.h> 38 39 /* 40 * Version Information 41 */ 42 #define DRIVER_VERSION "1.3.2" 43 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 44 45 /* 46 * 16C50 UART register defines 47 */ 48 49 #define LCR_BITS_5 0x00 /* 5 bits/char */ 50 #define LCR_BITS_6 0x01 /* 6 bits/char */ 51 #define LCR_BITS_7 0x02 /* 7 bits/char */ 52 #define LCR_BITS_8 0x03 /* 8 bits/char */ 53 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 54 55 #define LCR_STOP_1 0x00 /* 1 stop bit */ 56 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 57 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 58 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 59 60 #define LCR_PAR_NONE 0x00 /* No parity */ 61 #define LCR_PAR_ODD 0x08 /* Odd parity */ 62 #define LCR_PAR_EVEN 0x18 /* Even parity */ 63 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 64 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 65 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 66 67 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 68 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 69 70 #define MCR_DTR 0x01 /* Assert DTR */ 71 #define MCR_RTS 0x02 /* Assert RTS */ 72 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 73 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 74 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 75 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 76 77 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 78 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 79 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 80 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 81 82 /* 83 * Defines used for sending commands to port 84 */ 85 86 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */ 87 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */ 88 89 #define MOS_PORT1 0x0200 90 #define MOS_PORT2 0x0300 91 #define MOS_VENREG 0x0000 92 #define MOS_MAX_PORT 0x02 93 #define MOS_WRITE 0x0E 94 #define MOS_READ 0x0D 95 96 /* Requests */ 97 #define MCS_RD_RTYPE 0xC0 98 #define MCS_WR_RTYPE 0x40 99 #define MCS_RDREQ 0x0D 100 #define MCS_WRREQ 0x0E 101 #define MCS_CTRL_TIMEOUT 500 102 #define VENDOR_READ_LENGTH (0x01) 103 104 #define MAX_NAME_LEN 64 105 106 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 107 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 108 109 /* For higher baud Rates use TIOCEXBAUD */ 110 #define TIOCEXBAUD 0x5462 111 112 /* vendor id and device id defines */ 113 114 /* The native mos7840/7820 component */ 115 #define USB_VENDOR_ID_MOSCHIP 0x9710 116 #define MOSCHIP_DEVICE_ID_7840 0x7840 117 #define MOSCHIP_DEVICE_ID_7820 0x7820 118 /* The native component can have its vendor/device id's overridden 119 * in vendor-specific implementations. Such devices can be handled 120 * by making a change here, in moschip_port_id_table, and in 121 * moschip_id_table_combined 122 */ 123 #define USB_VENDOR_ID_BANDB 0x0856 124 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 125 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 126 127 /* This driver also supports 128 * ATEN UC2324 device using Moschip MCS7840 129 * ATEN UC2322 device using Moschip MCS7820 130 */ 131 #define USB_VENDOR_ID_ATENINTL 0x0557 132 #define ATENINTL_DEVICE_ID_UC2324 0x2011 133 #define ATENINTL_DEVICE_ID_UC2322 0x7820 134 135 /* Interrupt Routine Defines */ 136 137 #define SERIAL_IIR_RLS 0x06 138 #define SERIAL_IIR_MS 0x00 139 140 /* 141 * Emulation of the bit mask on the LINE STATUS REGISTER. 142 */ 143 #define SERIAL_LSR_DR 0x0001 144 #define SERIAL_LSR_OE 0x0002 145 #define SERIAL_LSR_PE 0x0004 146 #define SERIAL_LSR_FE 0x0008 147 #define SERIAL_LSR_BI 0x0010 148 149 #define MOS_MSR_DELTA_CTS 0x10 150 #define MOS_MSR_DELTA_DSR 0x20 151 #define MOS_MSR_DELTA_RI 0x40 152 #define MOS_MSR_DELTA_CD 0x80 153 154 /* Serial Port register Address */ 155 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 156 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 157 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 158 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 159 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 160 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 161 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 162 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 163 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 164 165 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 166 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 167 168 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 169 170 /* 171 * URB POOL related defines 172 */ 173 #define NUM_URBS 16 /* URB Count */ 174 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 175 176 177 static struct usb_device_id moschip_port_id_table[] = { 178 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 179 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 180 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 181 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 182 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 183 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 184 {} /* terminating entry */ 185 }; 186 187 static __devinitdata struct usb_device_id moschip_id_table_combined[] = { 188 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 190 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 192 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 193 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 194 {} /* terminating entry */ 195 }; 196 197 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); 198 199 /* This structure holds all of the local port information */ 200 201 struct moschip_port { 202 int port_num; /*Actual port number in the device(1,2,etc) */ 203 struct urb *write_urb; /* write URB for this port */ 204 struct urb *read_urb; /* read URB for this port */ 205 struct urb *int_urb; 206 __u8 shadowLCR; /* last LCR value received */ 207 __u8 shadowMCR; /* last MCR value received */ 208 char open; 209 char open_ports; 210 char zombie; 211 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 212 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 213 int delta_msr_cond; 214 struct async_icount icount; 215 struct usb_serial_port *port; /* loop back to the owner of this object */ 216 217 /* Offsets */ 218 __u8 SpRegOffset; 219 __u8 ControlRegOffset; 220 __u8 DcrRegOffset; 221 /* for processing control URBS in interrupt context */ 222 struct urb *control_urb; 223 struct usb_ctrlrequest *dr; 224 char *ctrl_buf; 225 int MsrLsr; 226 227 spinlock_t pool_lock; 228 struct urb *write_urb_pool[NUM_URBS]; 229 char busy[NUM_URBS]; 230 bool read_urb_busy; 231 }; 232 233 234 static int debug; 235 236 /* 237 * mos7840_set_reg_sync 238 * To set the Control register by calling usb_fill_control_urb function 239 * by passing usb_sndctrlpipe function as parameter. 240 */ 241 242 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 243 __u16 val) 244 { 245 struct usb_device *dev = port->serial->dev; 246 val = val & 0x00ff; 247 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val); 248 249 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 250 MCS_WR_RTYPE, val, reg, NULL, 0, 251 MOS_WDR_TIMEOUT); 252 } 253 254 /* 255 * mos7840_get_reg_sync 256 * To set the Uart register by calling usb_fill_control_urb function by 257 * passing usb_rcvctrlpipe function as parameter. 258 */ 259 260 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 261 __u16 *val) 262 { 263 struct usb_device *dev = port->serial->dev; 264 int ret = 0; 265 266 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 267 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, 268 MOS_WDR_TIMEOUT); 269 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); 270 *val = (*val) & 0x00ff; 271 return ret; 272 } 273 274 /* 275 * mos7840_set_uart_reg 276 * To set the Uart register by calling usb_fill_control_urb function by 277 * passing usb_sndctrlpipe function as parameter. 278 */ 279 280 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 281 __u16 val) 282 { 283 284 struct usb_device *dev = port->serial->dev; 285 val = val & 0x00ff; 286 /* For the UART control registers, the application number need 287 to be Or'ed */ 288 if (port->serial->num_ports == 4) { 289 val |= (((__u16) port->number - 290 (__u16) (port->serial->minor)) + 1) << 8; 291 dbg("mos7840_set_uart_reg application number is %x", val); 292 } else { 293 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 294 val |= (((__u16) port->number - 295 (__u16) (port->serial->minor)) + 1) << 8; 296 dbg("mos7840_set_uart_reg application number is %x", 297 val); 298 } else { 299 val |= 300 (((__u16) port->number - 301 (__u16) (port->serial->minor)) + 2) << 8; 302 dbg("mos7840_set_uart_reg application number is %x", 303 val); 304 } 305 } 306 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 307 MCS_WR_RTYPE, val, reg, NULL, 0, 308 MOS_WDR_TIMEOUT); 309 310 } 311 312 /* 313 * mos7840_get_uart_reg 314 * To set the Control register by calling usb_fill_control_urb function 315 * by passing usb_rcvctrlpipe function as parameter. 316 */ 317 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 318 __u16 *val) 319 { 320 struct usb_device *dev = port->serial->dev; 321 int ret = 0; 322 __u16 Wval; 323 324 /* dbg("application number is %4x", 325 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ 326 /* Wval is same as application number */ 327 if (port->serial->num_ports == 4) { 328 Wval = 329 (((__u16) port->number - (__u16) (port->serial->minor)) + 330 1) << 8; 331 dbg("mos7840_get_uart_reg application number is %x", Wval); 332 } else { 333 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 334 Wval = (((__u16) port->number - 335 (__u16) (port->serial->minor)) + 1) << 8; 336 dbg("mos7840_get_uart_reg application number is %x", 337 Wval); 338 } else { 339 Wval = (((__u16) port->number - 340 (__u16) (port->serial->minor)) + 2) << 8; 341 dbg("mos7840_get_uart_reg application number is %x", 342 Wval); 343 } 344 } 345 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 346 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, 347 MOS_WDR_TIMEOUT); 348 *val = (*val) & 0x00ff; 349 return ret; 350 } 351 352 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 353 { 354 355 dbg("***************************************"); 356 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset); 357 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset); 358 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset); 359 dbg("***************************************"); 360 361 } 362 363 /************************************************************************/ 364 /************************************************************************/ 365 /* I N T E R F A C E F U N C T I O N S */ 366 /* I N T E R F A C E F U N C T I O N S */ 367 /************************************************************************/ 368 /************************************************************************/ 369 370 static inline void mos7840_set_port_private(struct usb_serial_port *port, 371 struct moschip_port *data) 372 { 373 usb_set_serial_port_data(port, (void *)data); 374 } 375 376 static inline struct moschip_port *mos7840_get_port_private(struct 377 usb_serial_port 378 *port) 379 { 380 return (struct moschip_port *)usb_get_serial_port_data(port); 381 } 382 383 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 384 { 385 struct moschip_port *mos7840_port; 386 struct async_icount *icount; 387 mos7840_port = port; 388 icount = &mos7840_port->icount; 389 if (new_msr & 390 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 391 MOS_MSR_DELTA_CD)) { 392 icount = &mos7840_port->icount; 393 394 /* update input line counters */ 395 if (new_msr & MOS_MSR_DELTA_CTS) { 396 icount->cts++; 397 smp_wmb(); 398 } 399 if (new_msr & MOS_MSR_DELTA_DSR) { 400 icount->dsr++; 401 smp_wmb(); 402 } 403 if (new_msr & MOS_MSR_DELTA_CD) { 404 icount->dcd++; 405 smp_wmb(); 406 } 407 if (new_msr & MOS_MSR_DELTA_RI) { 408 icount->rng++; 409 smp_wmb(); 410 } 411 } 412 } 413 414 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 415 { 416 struct async_icount *icount; 417 418 dbg("%s - %02x", __func__, new_lsr); 419 420 if (new_lsr & SERIAL_LSR_BI) { 421 /* 422 * Parity and Framing errors only count if they 423 * occur exclusive of a break being 424 * received. 425 */ 426 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 427 } 428 429 /* update input line counters */ 430 icount = &port->icount; 431 if (new_lsr & SERIAL_LSR_BI) { 432 icount->brk++; 433 smp_wmb(); 434 } 435 if (new_lsr & SERIAL_LSR_OE) { 436 icount->overrun++; 437 smp_wmb(); 438 } 439 if (new_lsr & SERIAL_LSR_PE) { 440 icount->parity++; 441 smp_wmb(); 442 } 443 if (new_lsr & SERIAL_LSR_FE) { 444 icount->frame++; 445 smp_wmb(); 446 } 447 } 448 449 /************************************************************************/ 450 /************************************************************************/ 451 /* U S B C A L L B A C K F U N C T I O N S */ 452 /* U S B C A L L B A C K F U N C T I O N S */ 453 /************************************************************************/ 454 /************************************************************************/ 455 456 static void mos7840_control_callback(struct urb *urb) 457 { 458 unsigned char *data; 459 struct moschip_port *mos7840_port; 460 __u8 regval = 0x0; 461 int result = 0; 462 int status = urb->status; 463 464 mos7840_port = urb->context; 465 466 switch (status) { 467 case 0: 468 /* success */ 469 break; 470 case -ECONNRESET: 471 case -ENOENT: 472 case -ESHUTDOWN: 473 /* this urb is terminated, clean up */ 474 dbg("%s - urb shutting down with status: %d", __func__, 475 status); 476 return; 477 default: 478 dbg("%s - nonzero urb status received: %d", __func__, 479 status); 480 goto exit; 481 } 482 483 dbg("%s urb buffer size is %d", __func__, urb->actual_length); 484 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__, 485 mos7840_port->MsrLsr, mos7840_port->port_num); 486 data = urb->transfer_buffer; 487 regval = (__u8) data[0]; 488 dbg("%s data is %x", __func__, regval); 489 if (mos7840_port->MsrLsr == 0) 490 mos7840_handle_new_msr(mos7840_port, regval); 491 else if (mos7840_port->MsrLsr == 1) 492 mos7840_handle_new_lsr(mos7840_port, regval); 493 494 exit: 495 spin_lock(&mos7840_port->pool_lock); 496 if (!mos7840_port->zombie) 497 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 498 spin_unlock(&mos7840_port->pool_lock); 499 if (result) { 500 dev_err(&urb->dev->dev, 501 "%s - Error %d submitting interrupt urb\n", 502 __func__, result); 503 } 504 } 505 506 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 507 __u16 *val) 508 { 509 struct usb_device *dev = mcs->port->serial->dev; 510 struct usb_ctrlrequest *dr = mcs->dr; 511 unsigned char *buffer = mcs->ctrl_buf; 512 int ret; 513 514 dr->bRequestType = MCS_RD_RTYPE; 515 dr->bRequest = MCS_RDREQ; 516 dr->wValue = cpu_to_le16(Wval); /* 0 */ 517 dr->wIndex = cpu_to_le16(reg); 518 dr->wLength = cpu_to_le16(2); 519 520 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 521 (unsigned char *)dr, buffer, 2, 522 mos7840_control_callback, mcs); 523 mcs->control_urb->transfer_buffer_length = 2; 524 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 525 return ret; 526 } 527 528 /***************************************************************************** 529 * mos7840_interrupt_callback 530 * this is the callback function for when we have received data on the 531 * interrupt endpoint. 532 *****************************************************************************/ 533 534 static void mos7840_interrupt_callback(struct urb *urb) 535 { 536 int result; 537 int length; 538 struct moschip_port *mos7840_port; 539 struct usb_serial *serial; 540 __u16 Data; 541 unsigned char *data; 542 __u8 sp[5], st; 543 int i, rv = 0; 544 __u16 wval, wreg = 0; 545 int status = urb->status; 546 547 dbg("%s", " : Entering"); 548 549 switch (status) { 550 case 0: 551 /* success */ 552 break; 553 case -ECONNRESET: 554 case -ENOENT: 555 case -ESHUTDOWN: 556 /* this urb is terminated, clean up */ 557 dbg("%s - urb shutting down with status: %d", __func__, 558 status); 559 return; 560 default: 561 dbg("%s - nonzero urb status received: %d", __func__, 562 status); 563 goto exit; 564 } 565 566 length = urb->actual_length; 567 data = urb->transfer_buffer; 568 569 serial = urb->context; 570 571 /* Moschip get 5 bytes 572 * Byte 1 IIR Port 1 (port.number is 0) 573 * Byte 2 IIR Port 2 (port.number is 1) 574 * Byte 3 IIR Port 3 (port.number is 2) 575 * Byte 4 IIR Port 4 (port.number is 3) 576 * Byte 5 FIFO status for both */ 577 578 if (length && length > 5) { 579 dbg("%s", "Wrong data !!!"); 580 return; 581 } 582 583 sp[0] = (__u8) data[0]; 584 sp[1] = (__u8) data[1]; 585 sp[2] = (__u8) data[2]; 586 sp[3] = (__u8) data[3]; 587 st = (__u8) data[4]; 588 589 for (i = 0; i < serial->num_ports; i++) { 590 mos7840_port = mos7840_get_port_private(serial->port[i]); 591 wval = 592 (((__u16) serial->port[i]->number - 593 (__u16) (serial->minor)) + 1) << 8; 594 if (mos7840_port->open) { 595 if (sp[i] & 0x01) { 596 dbg("SP%d No Interrupt !!!", i); 597 } else { 598 switch (sp[i] & 0x0f) { 599 case SERIAL_IIR_RLS: 600 dbg("Serial Port %d: Receiver status error or ", i); 601 dbg("address bit detected in 9-bit mode"); 602 mos7840_port->MsrLsr = 1; 603 wreg = LINE_STATUS_REGISTER; 604 break; 605 case SERIAL_IIR_MS: 606 dbg("Serial Port %d: Modem status change", i); 607 mos7840_port->MsrLsr = 0; 608 wreg = MODEM_STATUS_REGISTER; 609 break; 610 } 611 spin_lock(&mos7840_port->pool_lock); 612 if (!mos7840_port->zombie) { 613 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 614 } else { 615 spin_unlock(&mos7840_port->pool_lock); 616 return; 617 } 618 spin_unlock(&mos7840_port->pool_lock); 619 } 620 } 621 } 622 if (!(rv < 0)) 623 /* the completion handler for the control urb will resubmit */ 624 return; 625 exit: 626 result = usb_submit_urb(urb, GFP_ATOMIC); 627 if (result) { 628 dev_err(&urb->dev->dev, 629 "%s - Error %d submitting interrupt urb\n", 630 __func__, result); 631 } 632 } 633 634 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 635 const char *function) 636 { 637 if (!port) { 638 dbg("%s - port == NULL", function); 639 return -1; 640 } 641 if (!port->serial) { 642 dbg("%s - port->serial == NULL", function); 643 return -1; 644 } 645 646 return 0; 647 } 648 649 /* Inline functions to check the sanity of a pointer that is passed to us */ 650 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 651 const char *function) 652 { 653 if (!serial) { 654 dbg("%s - serial == NULL", function); 655 return -1; 656 } 657 if (!serial->type) { 658 dbg("%s - serial->type == NULL!", function); 659 return -1; 660 } 661 662 return 0; 663 } 664 665 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 666 const char *function) 667 { 668 /* if no port was specified, or it fails a paranoia check */ 669 if (!port || 670 mos7840_port_paranoia_check(port, function) || 671 mos7840_serial_paranoia_check(port->serial, function)) { 672 /* then say that we don't have a valid usb_serial thing, 673 * which will end up genrating -ENODEV return values */ 674 return NULL; 675 } 676 677 return port->serial; 678 } 679 680 /***************************************************************************** 681 * mos7840_bulk_in_callback 682 * this is the callback function for when we have received data on the 683 * bulk in endpoint. 684 *****************************************************************************/ 685 686 static void mos7840_bulk_in_callback(struct urb *urb) 687 { 688 int retval; 689 unsigned char *data; 690 struct usb_serial *serial; 691 struct usb_serial_port *port; 692 struct moschip_port *mos7840_port; 693 struct tty_struct *tty; 694 int status = urb->status; 695 696 mos7840_port = urb->context; 697 if (!mos7840_port) { 698 dbg("%s", "NULL mos7840_port pointer"); 699 mos7840_port->read_urb_busy = false; 700 return; 701 } 702 703 if (status) { 704 dbg("nonzero read bulk status received: %d", status); 705 mos7840_port->read_urb_busy = false; 706 return; 707 } 708 709 port = (struct usb_serial_port *)mos7840_port->port; 710 if (mos7840_port_paranoia_check(port, __func__)) { 711 dbg("%s", "Port Paranoia failed"); 712 mos7840_port->read_urb_busy = false; 713 return; 714 } 715 716 serial = mos7840_get_usb_serial(port, __func__); 717 if (!serial) { 718 dbg("%s", "Bad serial pointer"); 719 mos7840_port->read_urb_busy = false; 720 return; 721 } 722 723 dbg("%s", "Entering... "); 724 725 data = urb->transfer_buffer; 726 727 dbg("%s", "Entering ..........."); 728 729 if (urb->actual_length) { 730 tty = tty_port_tty_get(&mos7840_port->port->port); 731 if (tty) { 732 tty_buffer_request_room(tty, urb->actual_length); 733 tty_insert_flip_string(tty, data, urb->actual_length); 734 dbg(" %s ", data); 735 tty_flip_buffer_push(tty); 736 tty_kref_put(tty); 737 } 738 mos7840_port->icount.rx += urb->actual_length; 739 smp_wmb(); 740 dbg("mos7840_port->icount.rx is %d:", 741 mos7840_port->icount.rx); 742 } 743 744 if (!mos7840_port->read_urb) { 745 dbg("%s", "URB KILLED !!!"); 746 mos7840_port->read_urb_busy = false; 747 return; 748 } 749 750 751 mos7840_port->read_urb->dev = serial->dev; 752 753 mos7840_port->read_urb_busy = true; 754 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 755 756 if (retval) { 757 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); 758 mos7840_port->read_urb_busy = false; 759 } 760 } 761 762 /***************************************************************************** 763 * mos7840_bulk_out_data_callback 764 * this is the callback function for when we have finished sending 765 * serial data on the bulk out endpoint. 766 *****************************************************************************/ 767 768 static void mos7840_bulk_out_data_callback(struct urb *urb) 769 { 770 struct moschip_port *mos7840_port; 771 struct tty_struct *tty; 772 int status = urb->status; 773 int i; 774 775 mos7840_port = urb->context; 776 spin_lock(&mos7840_port->pool_lock); 777 for (i = 0; i < NUM_URBS; i++) { 778 if (urb == mos7840_port->write_urb_pool[i]) { 779 mos7840_port->busy[i] = 0; 780 break; 781 } 782 } 783 spin_unlock(&mos7840_port->pool_lock); 784 785 if (status) { 786 dbg("nonzero write bulk status received:%d", status); 787 return; 788 } 789 790 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { 791 dbg("%s", "Port Paranoia failed"); 792 return; 793 } 794 795 dbg("%s", "Entering ........."); 796 797 tty = tty_port_tty_get(&mos7840_port->port->port); 798 if (tty && mos7840_port->open) 799 tty_wakeup(tty); 800 tty_kref_put(tty); 801 802 } 803 804 /************************************************************************/ 805 /* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */ 806 /************************************************************************/ 807 #ifdef MCSSerialProbe 808 static int mos7840_serial_probe(struct usb_serial *serial, 809 const struct usb_device_id *id) 810 { 811 812 /*need to implement the mode_reg reading and updating\ 813 structures usb_serial_ device_type\ 814 (i.e num_ports, num_bulkin,bulkout etc) */ 815 /* Also we can update the changes attach */ 816 return 1; 817 } 818 #endif 819 820 /***************************************************************************** 821 * mos7840_open 822 * this function is called by the tty driver when a port is opened 823 * If successful, we return 0 824 * Otherwise we return a negative error number. 825 *****************************************************************************/ 826 827 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 828 { 829 int response; 830 int j; 831 struct usb_serial *serial; 832 struct urb *urb; 833 __u16 Data; 834 int status; 835 struct moschip_port *mos7840_port; 836 struct moschip_port *port0; 837 838 dbg ("%s enter", __func__); 839 840 if (mos7840_port_paranoia_check(port, __func__)) { 841 dbg("%s", "Port Paranoia failed"); 842 return -ENODEV; 843 } 844 845 serial = port->serial; 846 847 if (mos7840_serial_paranoia_check(serial, __func__)) { 848 dbg("%s", "Serial Paranoia failed"); 849 return -ENODEV; 850 } 851 852 mos7840_port = mos7840_get_port_private(port); 853 port0 = mos7840_get_port_private(serial->port[0]); 854 855 if (mos7840_port == NULL || port0 == NULL) 856 return -ENODEV; 857 858 usb_clear_halt(serial->dev, port->write_urb->pipe); 859 usb_clear_halt(serial->dev, port->read_urb->pipe); 860 port0->open_ports++; 861 862 /* Initialising the write urb pool */ 863 for (j = 0; j < NUM_URBS; ++j) { 864 urb = usb_alloc_urb(0, GFP_KERNEL); 865 mos7840_port->write_urb_pool[j] = urb; 866 867 if (urb == NULL) { 868 dev_err(&port->dev, "No more urbs???\n"); 869 continue; 870 } 871 872 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 873 GFP_KERNEL); 874 if (!urb->transfer_buffer) { 875 usb_free_urb(urb); 876 mos7840_port->write_urb_pool[j] = NULL; 877 dev_err(&port->dev, 878 "%s-out of memory for urb buffers.\n", 879 __func__); 880 continue; 881 } 882 } 883 884 /***************************************************************************** 885 * Initialize MCS7840 -- Write Init values to corresponding Registers 886 * 887 * Register Index 888 * 1 : IER 889 * 2 : FCR 890 * 3 : LCR 891 * 4 : MCR 892 * 893 * 0x08 : SP1/2 Control Reg 894 *****************************************************************************/ 895 896 /* NEED to check the following Block */ 897 898 Data = 0x0; 899 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 900 if (status < 0) { 901 dbg("Reading Spreg failed"); 902 return -1; 903 } 904 Data |= 0x80; 905 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 906 if (status < 0) { 907 dbg("writing Spreg failed"); 908 return -1; 909 } 910 911 Data &= ~0x80; 912 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 913 if (status < 0) { 914 dbg("writing Spreg failed"); 915 return -1; 916 } 917 /* End of block to be checked */ 918 919 Data = 0x0; 920 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 921 &Data); 922 if (status < 0) { 923 dbg("Reading Controlreg failed"); 924 return -1; 925 } 926 Data |= 0x08; /* Driver done bit */ 927 Data |= 0x20; /* rx_disable */ 928 status = mos7840_set_reg_sync(port, 929 mos7840_port->ControlRegOffset, Data); 930 if (status < 0) { 931 dbg("writing Controlreg failed"); 932 return -1; 933 } 934 /* do register settings here */ 935 /* Set all regs to the device default values. */ 936 /*********************************** 937 * First Disable all interrupts. 938 ***********************************/ 939 Data = 0x00; 940 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 941 if (status < 0) { 942 dbg("disabling interrupts failed"); 943 return -1; 944 } 945 /* Set FIFO_CONTROL_REGISTER to the default value */ 946 Data = 0x00; 947 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 948 if (status < 0) { 949 dbg("Writing FIFO_CONTROL_REGISTER failed"); 950 return -1; 951 } 952 953 Data = 0xcf; 954 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 955 if (status < 0) { 956 dbg("Writing FIFO_CONTROL_REGISTER failed"); 957 return -1; 958 } 959 960 Data = 0x03; 961 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 962 mos7840_port->shadowLCR = Data; 963 964 Data = 0x0b; 965 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 966 mos7840_port->shadowMCR = Data; 967 968 Data = 0x00; 969 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 970 mos7840_port->shadowLCR = Data; 971 972 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 973 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 974 975 Data = 0x0c; 976 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 977 978 Data = 0x0; 979 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 980 981 Data = 0x00; 982 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 983 984 Data = Data & ~SERIAL_LCR_DLAB; 985 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 986 mos7840_port->shadowLCR = Data; 987 988 /* clearing Bulkin and Bulkout Fifo */ 989 Data = 0x0; 990 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 991 992 Data = Data | 0x0c; 993 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 994 995 Data = Data & ~0x0c; 996 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 997 /* Finally enable all interrupts */ 998 Data = 0x0c; 999 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1000 1001 /* clearing rx_disable */ 1002 Data = 0x0; 1003 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1004 &Data); 1005 Data = Data & ~0x20; 1006 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1007 Data); 1008 1009 /* rx_negate */ 1010 Data = 0x0; 1011 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1012 &Data); 1013 Data = Data | 0x10; 1014 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1015 Data); 1016 1017 /* Check to see if we've set up our endpoint info yet * 1018 * (can't set it up in mos7840_startup as the structures * 1019 * were not set up at that time.) */ 1020 if (port0->open_ports == 1) { 1021 if (serial->port[0]->interrupt_in_buffer == NULL) { 1022 /* set up interrupt urb */ 1023 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1024 serial->dev, 1025 usb_rcvintpipe(serial->dev, 1026 serial->port[0]->interrupt_in_endpointAddress), 1027 serial->port[0]->interrupt_in_buffer, 1028 serial->port[0]->interrupt_in_urb-> 1029 transfer_buffer_length, 1030 mos7840_interrupt_callback, 1031 serial, 1032 serial->port[0]->interrupt_in_urb->interval); 1033 1034 /* start interrupt read for mos7840 * 1035 * will continue as long as mos7840 is connected */ 1036 1037 response = 1038 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1039 GFP_KERNEL); 1040 if (response) { 1041 dev_err(&port->dev, "%s - Error %d submitting " 1042 "interrupt urb\n", __func__, response); 1043 } 1044 1045 } 1046 1047 } 1048 1049 /* see if we've set up our endpoint info yet * 1050 * (can't set it up in mos7840_startup as the * 1051 * structures were not set up at that time.) */ 1052 1053 dbg("port number is %d", port->number); 1054 dbg("serial number is %d", port->serial->minor); 1055 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); 1056 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); 1057 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); 1058 dbg("port's number in the device is %d", mos7840_port->port_num); 1059 mos7840_port->read_urb = port->read_urb; 1060 1061 /* set up our bulk in urb */ 1062 1063 usb_fill_bulk_urb(mos7840_port->read_urb, 1064 serial->dev, 1065 usb_rcvbulkpipe(serial->dev, 1066 port->bulk_in_endpointAddress), 1067 port->bulk_in_buffer, 1068 mos7840_port->read_urb->transfer_buffer_length, 1069 mos7840_bulk_in_callback, mos7840_port); 1070 1071 dbg("mos7840_open: bulkin endpoint is %d", 1072 port->bulk_in_endpointAddress); 1073 mos7840_port->read_urb_busy = true; 1074 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1075 if (response) { 1076 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1077 __func__, response); 1078 mos7840_port->read_urb_busy = false; 1079 } 1080 1081 /* initialize our wait queues */ 1082 init_waitqueue_head(&mos7840_port->wait_chase); 1083 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1084 1085 /* initialize our icount structure */ 1086 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1087 1088 /* initialize our port settings */ 1089 /* Must set to enable ints! */ 1090 mos7840_port->shadowMCR = MCR_MASTER_IE; 1091 /* send a open port command */ 1092 mos7840_port->open = 1; 1093 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1094 mos7840_port->icount.tx = 0; 1095 mos7840_port->icount.rx = 0; 1096 1097 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", 1098 serial, mos7840_port, port); 1099 1100 dbg ("%s leave", __func__); 1101 1102 return 0; 1103 1104 } 1105 1106 /***************************************************************************** 1107 * mos7840_chars_in_buffer 1108 * this function is called by the tty driver when it wants to know how many 1109 * bytes of data we currently have outstanding in the port (data that has 1110 * been written, but hasn't made it out the port yet) 1111 * If successful, we return the number of bytes left to be written in the 1112 * system, 1113 * Otherwise we return zero. 1114 *****************************************************************************/ 1115 1116 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1117 { 1118 struct usb_serial_port *port = tty->driver_data; 1119 int i; 1120 int chars = 0; 1121 unsigned long flags; 1122 struct moschip_port *mos7840_port; 1123 1124 dbg("%s", " mos7840_chars_in_buffer:entering ..........."); 1125 1126 if (mos7840_port_paranoia_check(port, __func__)) { 1127 dbg("%s", "Invalid port"); 1128 return 0; 1129 } 1130 1131 mos7840_port = mos7840_get_port_private(port); 1132 if (mos7840_port == NULL) { 1133 dbg("%s", "mos7840_break:leaving ..........."); 1134 return 0; 1135 } 1136 1137 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1138 for (i = 0; i < NUM_URBS; ++i) 1139 if (mos7840_port->busy[i]) 1140 chars += URB_TRANSFER_BUFFER_SIZE; 1141 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1142 dbg("%s - returns %d", __func__, chars); 1143 return chars; 1144 1145 } 1146 1147 /***************************************************************************** 1148 * mos7840_close 1149 * this function is called by the tty driver when a port is closed 1150 *****************************************************************************/ 1151 1152 static void mos7840_close(struct usb_serial_port *port) 1153 { 1154 struct usb_serial *serial; 1155 struct moschip_port *mos7840_port; 1156 struct moschip_port *port0; 1157 int j; 1158 __u16 Data; 1159 1160 dbg("%s", "mos7840_close:entering..."); 1161 1162 if (mos7840_port_paranoia_check(port, __func__)) { 1163 dbg("%s", "Port Paranoia failed"); 1164 return; 1165 } 1166 1167 serial = mos7840_get_usb_serial(port, __func__); 1168 if (!serial) { 1169 dbg("%s", "Serial Paranoia failed"); 1170 return; 1171 } 1172 1173 mos7840_port = mos7840_get_port_private(port); 1174 port0 = mos7840_get_port_private(serial->port[0]); 1175 1176 if (mos7840_port == NULL || port0 == NULL) 1177 return; 1178 1179 for (j = 0; j < NUM_URBS; ++j) 1180 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1181 1182 /* Freeing Write URBs */ 1183 for (j = 0; j < NUM_URBS; ++j) { 1184 if (mos7840_port->write_urb_pool[j]) { 1185 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1186 kfree(mos7840_port->write_urb_pool[j]-> 1187 transfer_buffer); 1188 1189 usb_free_urb(mos7840_port->write_urb_pool[j]); 1190 } 1191 } 1192 1193 /* While closing port, shutdown all bulk read, write * 1194 * and interrupt read if they exists */ 1195 if (serial->dev) { 1196 if (mos7840_port->write_urb) { 1197 dbg("%s", "Shutdown bulk write"); 1198 usb_kill_urb(mos7840_port->write_urb); 1199 } 1200 if (mos7840_port->read_urb) { 1201 dbg("%s", "Shutdown bulk read"); 1202 usb_kill_urb(mos7840_port->read_urb); 1203 mos7840_port->read_urb_busy = false; 1204 } 1205 if ((&mos7840_port->control_urb)) { 1206 dbg("%s", "Shutdown control read"); 1207 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1208 } 1209 } 1210 /* if(mos7840_port->ctrl_buf != NULL) */ 1211 /* kfree(mos7840_port->ctrl_buf); */ 1212 port0->open_ports--; 1213 dbg("mos7840_num_open_ports in close%d:in port%d", 1214 port0->open_ports, port->number); 1215 if (port0->open_ports == 0) { 1216 if (serial->port[0]->interrupt_in_urb) { 1217 dbg("%s", "Shutdown interrupt_in_urb"); 1218 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1219 } 1220 } 1221 1222 if (mos7840_port->write_urb) { 1223 /* if this urb had a transfer buffer already (old tx) free it */ 1224 if (mos7840_port->write_urb->transfer_buffer != NULL) 1225 kfree(mos7840_port->write_urb->transfer_buffer); 1226 usb_free_urb(mos7840_port->write_urb); 1227 } 1228 1229 Data = 0x0; 1230 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1231 1232 Data = 0x00; 1233 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1234 1235 mos7840_port->open = 0; 1236 1237 dbg("%s", "Leaving ............"); 1238 } 1239 1240 /************************************************************************ 1241 * 1242 * mos7840_block_until_chase_response 1243 * 1244 * This function will block the close until one of the following: 1245 * 1. Response to our Chase comes from mos7840 1246 * 2. A timeout of 10 seconds without activity has expired 1247 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1248 * 1249 ************************************************************************/ 1250 1251 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1252 struct moschip_port *mos7840_port) 1253 { 1254 int timeout = 1 * HZ; 1255 int wait = 10; 1256 int count; 1257 1258 while (1) { 1259 count = mos7840_chars_in_buffer(tty); 1260 1261 /* Check for Buffer status */ 1262 if (count <= 0) 1263 return; 1264 1265 /* Block the thread for a while */ 1266 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1267 timeout); 1268 /* No activity.. count down section */ 1269 wait--; 1270 if (wait == 0) { 1271 dbg("%s - TIMEOUT", __func__); 1272 return; 1273 } else { 1274 /* Reset timeout value back to seconds */ 1275 wait = 10; 1276 } 1277 } 1278 1279 } 1280 1281 /***************************************************************************** 1282 * mos7840_break 1283 * this function sends a break to the port 1284 *****************************************************************************/ 1285 static void mos7840_break(struct tty_struct *tty, int break_state) 1286 { 1287 struct usb_serial_port *port = tty->driver_data; 1288 unsigned char data; 1289 struct usb_serial *serial; 1290 struct moschip_port *mos7840_port; 1291 1292 dbg("%s", "Entering ..........."); 1293 dbg("mos7840_break: Start"); 1294 1295 if (mos7840_port_paranoia_check(port, __func__)) { 1296 dbg("%s", "Port Paranoia failed"); 1297 return; 1298 } 1299 1300 serial = mos7840_get_usb_serial(port, __func__); 1301 if (!serial) { 1302 dbg("%s", "Serial Paranoia failed"); 1303 return; 1304 } 1305 1306 mos7840_port = mos7840_get_port_private(port); 1307 1308 if (mos7840_port == NULL) 1309 return; 1310 1311 if (serial->dev) 1312 /* flush and block until tx is empty */ 1313 mos7840_block_until_chase_response(tty, mos7840_port); 1314 1315 if (break_state == -1) 1316 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1317 else 1318 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1319 1320 /* FIXME: no locking on shadowLCR anywhere in driver */ 1321 mos7840_port->shadowLCR = data; 1322 dbg("mcs7840_break mos7840_port->shadowLCR is %x", 1323 mos7840_port->shadowLCR); 1324 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1325 mos7840_port->shadowLCR); 1326 1327 return; 1328 } 1329 1330 /***************************************************************************** 1331 * mos7840_write_room 1332 * this function is called by the tty driver when it wants to know how many 1333 * bytes of data we can accept for a specific port. 1334 * If successful, we return the amount of room that we have for this port 1335 * Otherwise we return a negative error number. 1336 *****************************************************************************/ 1337 1338 static int mos7840_write_room(struct tty_struct *tty) 1339 { 1340 struct usb_serial_port *port = tty->driver_data; 1341 int i; 1342 int room = 0; 1343 unsigned long flags; 1344 struct moschip_port *mos7840_port; 1345 1346 dbg("%s", " mos7840_write_room:entering ..........."); 1347 1348 if (mos7840_port_paranoia_check(port, __func__)) { 1349 dbg("%s", "Invalid port"); 1350 dbg("%s", " mos7840_write_room:leaving ..........."); 1351 return -1; 1352 } 1353 1354 mos7840_port = mos7840_get_port_private(port); 1355 if (mos7840_port == NULL) { 1356 dbg("%s", "mos7840_break:leaving ..........."); 1357 return -1; 1358 } 1359 1360 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1361 for (i = 0; i < NUM_URBS; ++i) { 1362 if (!mos7840_port->busy[i]) 1363 room += URB_TRANSFER_BUFFER_SIZE; 1364 } 1365 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1366 1367 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1368 dbg("%s - returns %d", __func__, room); 1369 return room; 1370 1371 } 1372 1373 /***************************************************************************** 1374 * mos7840_write 1375 * this function is called by the tty driver when data should be written to 1376 * the port. 1377 * If successful, we return the number of bytes written, otherwise we 1378 * return a negative error number. 1379 *****************************************************************************/ 1380 1381 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1382 const unsigned char *data, int count) 1383 { 1384 int status; 1385 int i; 1386 int bytes_sent = 0; 1387 int transfer_size; 1388 unsigned long flags; 1389 1390 struct moschip_port *mos7840_port; 1391 struct usb_serial *serial; 1392 struct urb *urb; 1393 /* __u16 Data; */ 1394 const unsigned char *current_position = data; 1395 unsigned char *data1; 1396 dbg("%s", "entering ..........."); 1397 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1398 mos7840_port->shadowLCR); */ 1399 1400 #ifdef NOTMOS7840 1401 Data = 0x00; 1402 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1403 mos7840_port->shadowLCR = Data; 1404 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); 1405 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1406 mos7840_port->shadowLCR); 1407 1408 /* Data = 0x03; */ 1409 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1410 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1411 1412 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1413 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1414 1415 /* Data = 0x0c; */ 1416 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1417 Data = 0x00; 1418 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1419 dbg("mos7840_write:DLL value is %x", Data); 1420 1421 Data = 0x0; 1422 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1423 dbg("mos7840_write:DLM value is %x", Data); 1424 1425 Data = Data & ~SERIAL_LCR_DLAB; 1426 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1427 mos7840_port->shadowLCR); 1428 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1429 #endif 1430 1431 if (mos7840_port_paranoia_check(port, __func__)) { 1432 dbg("%s", "Port Paranoia failed"); 1433 return -1; 1434 } 1435 1436 serial = port->serial; 1437 if (mos7840_serial_paranoia_check(serial, __func__)) { 1438 dbg("%s", "Serial Paranoia failed"); 1439 return -1; 1440 } 1441 1442 mos7840_port = mos7840_get_port_private(port); 1443 if (mos7840_port == NULL) { 1444 dbg("%s", "mos7840_port is NULL"); 1445 return -1; 1446 } 1447 1448 /* try to find a free urb in the list */ 1449 urb = NULL; 1450 1451 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1452 for (i = 0; i < NUM_URBS; ++i) { 1453 if (!mos7840_port->busy[i]) { 1454 mos7840_port->busy[i] = 1; 1455 urb = mos7840_port->write_urb_pool[i]; 1456 dbg("URB:%d", i); 1457 break; 1458 } 1459 } 1460 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1461 1462 if (urb == NULL) { 1463 dbg("%s - no more free urbs", __func__); 1464 goto exit; 1465 } 1466 1467 if (urb->transfer_buffer == NULL) { 1468 urb->transfer_buffer = 1469 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1470 1471 if (urb->transfer_buffer == NULL) { 1472 dev_err(&port->dev, "%s no more kernel memory...\n", 1473 __func__); 1474 goto exit; 1475 } 1476 } 1477 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1478 1479 memcpy(urb->transfer_buffer, current_position, transfer_size); 1480 1481 /* fill urb with data and submit */ 1482 usb_fill_bulk_urb(urb, 1483 serial->dev, 1484 usb_sndbulkpipe(serial->dev, 1485 port->bulk_out_endpointAddress), 1486 urb->transfer_buffer, 1487 transfer_size, 1488 mos7840_bulk_out_data_callback, mos7840_port); 1489 1490 data1 = urb->transfer_buffer; 1491 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); 1492 1493 /* send it down the pipe */ 1494 status = usb_submit_urb(urb, GFP_ATOMIC); 1495 1496 if (status) { 1497 mos7840_port->busy[i] = 0; 1498 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 1499 "with status = %d\n", __func__, status); 1500 bytes_sent = status; 1501 goto exit; 1502 } 1503 bytes_sent = transfer_size; 1504 mos7840_port->icount.tx += transfer_size; 1505 smp_wmb(); 1506 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); 1507 exit: 1508 return bytes_sent; 1509 1510 } 1511 1512 /***************************************************************************** 1513 * mos7840_throttle 1514 * this function is called by the tty driver when it wants to stop the data 1515 * being read from the port. 1516 *****************************************************************************/ 1517 1518 static void mos7840_throttle(struct tty_struct *tty) 1519 { 1520 struct usb_serial_port *port = tty->driver_data; 1521 struct moschip_port *mos7840_port; 1522 int status; 1523 1524 if (mos7840_port_paranoia_check(port, __func__)) { 1525 dbg("%s", "Invalid port"); 1526 return; 1527 } 1528 1529 dbg("- port %d", port->number); 1530 1531 mos7840_port = mos7840_get_port_private(port); 1532 1533 if (mos7840_port == NULL) 1534 return; 1535 1536 if (!mos7840_port->open) { 1537 dbg("%s", "port not opened"); 1538 return; 1539 } 1540 1541 dbg("%s", "Entering .........."); 1542 1543 /* if we are implementing XON/XOFF, send the stop character */ 1544 if (I_IXOFF(tty)) { 1545 unsigned char stop_char = STOP_CHAR(tty); 1546 status = mos7840_write(tty, port, &stop_char, 1); 1547 if (status <= 0) 1548 return; 1549 } 1550 /* if we are implementing RTS/CTS, toggle that line */ 1551 if (tty->termios->c_cflag & CRTSCTS) { 1552 mos7840_port->shadowMCR &= ~MCR_RTS; 1553 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1554 mos7840_port->shadowMCR); 1555 if (status < 0) 1556 return; 1557 } 1558 1559 return; 1560 } 1561 1562 /***************************************************************************** 1563 * mos7840_unthrottle 1564 * this function is called by the tty driver when it wants to resume 1565 * the data being read from the port (called after mos7840_throttle is 1566 * called) 1567 *****************************************************************************/ 1568 static void mos7840_unthrottle(struct tty_struct *tty) 1569 { 1570 struct usb_serial_port *port = tty->driver_data; 1571 int status; 1572 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1573 1574 if (mos7840_port_paranoia_check(port, __func__)) { 1575 dbg("%s", "Invalid port"); 1576 return; 1577 } 1578 1579 if (mos7840_port == NULL) 1580 return; 1581 1582 if (!mos7840_port->open) { 1583 dbg("%s - port not opened", __func__); 1584 return; 1585 } 1586 1587 dbg("%s", "Entering .........."); 1588 1589 /* if we are implementing XON/XOFF, send the start character */ 1590 if (I_IXOFF(tty)) { 1591 unsigned char start_char = START_CHAR(tty); 1592 status = mos7840_write(tty, port, &start_char, 1); 1593 if (status <= 0) 1594 return; 1595 } 1596 1597 /* if we are implementing RTS/CTS, toggle that line */ 1598 if (tty->termios->c_cflag & CRTSCTS) { 1599 mos7840_port->shadowMCR |= MCR_RTS; 1600 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1601 mos7840_port->shadowMCR); 1602 if (status < 0) 1603 return; 1604 } 1605 } 1606 1607 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) 1608 { 1609 struct usb_serial_port *port = tty->driver_data; 1610 struct moschip_port *mos7840_port; 1611 unsigned int result; 1612 __u16 msr; 1613 __u16 mcr; 1614 int status; 1615 mos7840_port = mos7840_get_port_private(port); 1616 1617 dbg("%s - port %d", __func__, port->number); 1618 1619 if (mos7840_port == NULL) 1620 return -ENODEV; 1621 1622 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1623 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1624 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1625 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1626 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1627 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1628 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1629 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1630 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1631 1632 dbg("%s - 0x%04X", __func__, result); 1633 1634 return result; 1635 } 1636 1637 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, 1638 unsigned int set, unsigned int clear) 1639 { 1640 struct usb_serial_port *port = tty->driver_data; 1641 struct moschip_port *mos7840_port; 1642 unsigned int mcr; 1643 int status; 1644 1645 dbg("%s - port %d", __func__, port->number); 1646 1647 mos7840_port = mos7840_get_port_private(port); 1648 1649 if (mos7840_port == NULL) 1650 return -ENODEV; 1651 1652 /* FIXME: What locks the port registers ? */ 1653 mcr = mos7840_port->shadowMCR; 1654 if (clear & TIOCM_RTS) 1655 mcr &= ~MCR_RTS; 1656 if (clear & TIOCM_DTR) 1657 mcr &= ~MCR_DTR; 1658 if (clear & TIOCM_LOOP) 1659 mcr &= ~MCR_LOOPBACK; 1660 1661 if (set & TIOCM_RTS) 1662 mcr |= MCR_RTS; 1663 if (set & TIOCM_DTR) 1664 mcr |= MCR_DTR; 1665 if (set & TIOCM_LOOP) 1666 mcr |= MCR_LOOPBACK; 1667 1668 mos7840_port->shadowMCR = mcr; 1669 1670 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1671 if (status < 0) { 1672 dbg("setting MODEM_CONTROL_REGISTER Failed"); 1673 return status; 1674 } 1675 1676 return 0; 1677 } 1678 1679 /***************************************************************************** 1680 * mos7840_calc_baud_rate_divisor 1681 * this function calculates the proper baud rate divisor for the specified 1682 * baud rate. 1683 *****************************************************************************/ 1684 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1685 __u16 *clk_sel_val) 1686 { 1687 1688 dbg("%s - %d", __func__, baudRate); 1689 1690 if (baudRate <= 115200) { 1691 *divisor = 115200 / baudRate; 1692 *clk_sel_val = 0x0; 1693 } 1694 if ((baudRate > 115200) && (baudRate <= 230400)) { 1695 *divisor = 230400 / baudRate; 1696 *clk_sel_val = 0x10; 1697 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1698 *divisor = 403200 / baudRate; 1699 *clk_sel_val = 0x20; 1700 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1701 *divisor = 460800 / baudRate; 1702 *clk_sel_val = 0x30; 1703 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1704 *divisor = 806400 / baudRate; 1705 *clk_sel_val = 0x40; 1706 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1707 *divisor = 921600 / baudRate; 1708 *clk_sel_val = 0x50; 1709 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1710 *divisor = 1572864 / baudRate; 1711 *clk_sel_val = 0x60; 1712 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1713 *divisor = 3145728 / baudRate; 1714 *clk_sel_val = 0x70; 1715 } 1716 return 0; 1717 1718 #ifdef NOTMCS7840 1719 1720 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1721 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1722 *divisor = mos7840_divisor_table[i].Divisor; 1723 return 0; 1724 } 1725 } 1726 1727 /* After trying for all the standard baud rates * 1728 * Try calculating the divisor for this baud rate */ 1729 1730 if (baudrate > 75 && baudrate < 230400) { 1731 /* get the divisor */ 1732 custom = (__u16) (230400L / baudrate); 1733 1734 /* Check for round off */ 1735 round1 = (__u16) (2304000L / baudrate); 1736 round = (__u16) (round1 - (custom * 10)); 1737 if (round > 4) 1738 custom++; 1739 *divisor = custom; 1740 1741 dbg(" Baud %d = %d", baudrate, custom); 1742 return 0; 1743 } 1744 1745 dbg("%s", " Baud calculation Failed..."); 1746 return -1; 1747 #endif 1748 } 1749 1750 /***************************************************************************** 1751 * mos7840_send_cmd_write_baud_rate 1752 * this function sends the proper command to change the baud rate of the 1753 * specified port. 1754 *****************************************************************************/ 1755 1756 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1757 int baudRate) 1758 { 1759 int divisor = 0; 1760 int status; 1761 __u16 Data; 1762 unsigned char number; 1763 __u16 clk_sel_val; 1764 struct usb_serial_port *port; 1765 1766 if (mos7840_port == NULL) 1767 return -1; 1768 1769 port = (struct usb_serial_port *)mos7840_port->port; 1770 if (mos7840_port_paranoia_check(port, __func__)) { 1771 dbg("%s", "Invalid port"); 1772 return -1; 1773 } 1774 1775 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1776 dbg("%s", "Invalid Serial"); 1777 return -1; 1778 } 1779 1780 dbg("%s", "Entering .........."); 1781 1782 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1783 1784 dbg("%s - port = %d, baud = %d", __func__, 1785 mos7840_port->port->number, baudRate); 1786 /* reset clk_uart_sel in spregOffset */ 1787 if (baudRate > 115200) { 1788 #ifdef HW_flow_control 1789 /* NOTE: need to see the pther register to modify */ 1790 /* setting h/w flow control bit to 1 */ 1791 Data = 0x2b; 1792 mos7840_port->shadowMCR = Data; 1793 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1794 Data); 1795 if (status < 0) { 1796 dbg("Writing spreg failed in set_serial_baud"); 1797 return -1; 1798 } 1799 #endif 1800 1801 } else { 1802 #ifdef HW_flow_control 1803 / *setting h/w flow control bit to 0 */ 1804 Data = 0xb; 1805 mos7840_port->shadowMCR = Data; 1806 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1807 Data); 1808 if (status < 0) { 1809 dbg("Writing spreg failed in set_serial_baud"); 1810 return -1; 1811 } 1812 #endif 1813 1814 } 1815 1816 if (1) { /* baudRate <= 115200) */ 1817 clk_sel_val = 0x0; 1818 Data = 0x0; 1819 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1820 &clk_sel_val); 1821 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1822 &Data); 1823 if (status < 0) { 1824 dbg("reading spreg failed in set_serial_baud"); 1825 return -1; 1826 } 1827 Data = (Data & 0x8f) | clk_sel_val; 1828 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1829 Data); 1830 if (status < 0) { 1831 dbg("Writing spreg failed in set_serial_baud"); 1832 return -1; 1833 } 1834 /* Calculate the Divisor */ 1835 1836 if (status) { 1837 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1838 return status; 1839 } 1840 /* Enable access to divisor latch */ 1841 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1842 mos7840_port->shadowLCR = Data; 1843 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1844 1845 /* Write the divisor */ 1846 Data = (unsigned char)(divisor & 0xff); 1847 dbg("set_serial_baud Value to write DLL is %x", Data); 1848 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1849 1850 Data = (unsigned char)((divisor & 0xff00) >> 8); 1851 dbg("set_serial_baud Value to write DLM is %x", Data); 1852 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1853 1854 /* Disable access to divisor latch */ 1855 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1856 mos7840_port->shadowLCR = Data; 1857 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1858 1859 } 1860 return status; 1861 } 1862 1863 /***************************************************************************** 1864 * mos7840_change_port_settings 1865 * This routine is called to set the UART on the device to match 1866 * the specified new settings. 1867 *****************************************************************************/ 1868 1869 static void mos7840_change_port_settings(struct tty_struct *tty, 1870 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1871 { 1872 int baud; 1873 unsigned cflag; 1874 unsigned iflag; 1875 __u8 lData; 1876 __u8 lParity; 1877 __u8 lStop; 1878 int status; 1879 __u16 Data; 1880 struct usb_serial_port *port; 1881 struct usb_serial *serial; 1882 1883 if (mos7840_port == NULL) 1884 return; 1885 1886 port = (struct usb_serial_port *)mos7840_port->port; 1887 1888 if (mos7840_port_paranoia_check(port, __func__)) { 1889 dbg("%s", "Invalid port"); 1890 return; 1891 } 1892 1893 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1894 dbg("%s", "Invalid Serial"); 1895 return; 1896 } 1897 1898 serial = port->serial; 1899 1900 dbg("%s - port %d", __func__, mos7840_port->port->number); 1901 1902 if (!mos7840_port->open) { 1903 dbg("%s - port not opened", __func__); 1904 return; 1905 } 1906 1907 dbg("%s", "Entering .........."); 1908 1909 lData = LCR_BITS_8; 1910 lStop = LCR_STOP_1; 1911 lParity = LCR_PAR_NONE; 1912 1913 cflag = tty->termios->c_cflag; 1914 iflag = tty->termios->c_iflag; 1915 1916 /* Change the number of bits */ 1917 if (cflag & CSIZE) { 1918 switch (cflag & CSIZE) { 1919 case CS5: 1920 lData = LCR_BITS_5; 1921 break; 1922 1923 case CS6: 1924 lData = LCR_BITS_6; 1925 break; 1926 1927 case CS7: 1928 lData = LCR_BITS_7; 1929 break; 1930 default: 1931 case CS8: 1932 lData = LCR_BITS_8; 1933 break; 1934 } 1935 } 1936 /* Change the Parity bit */ 1937 if (cflag & PARENB) { 1938 if (cflag & PARODD) { 1939 lParity = LCR_PAR_ODD; 1940 dbg("%s - parity = odd", __func__); 1941 } else { 1942 lParity = LCR_PAR_EVEN; 1943 dbg("%s - parity = even", __func__); 1944 } 1945 1946 } else { 1947 dbg("%s - parity = none", __func__); 1948 } 1949 1950 if (cflag & CMSPAR) 1951 lParity = lParity | 0x20; 1952 1953 /* Change the Stop bit */ 1954 if (cflag & CSTOPB) { 1955 lStop = LCR_STOP_2; 1956 dbg("%s - stop bits = 2", __func__); 1957 } else { 1958 lStop = LCR_STOP_1; 1959 dbg("%s - stop bits = 1", __func__); 1960 } 1961 1962 /* Update the LCR with the correct value */ 1963 mos7840_port->shadowLCR &= 1964 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1965 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1966 1967 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", 1968 mos7840_port->shadowLCR); 1969 /* Disable Interrupts */ 1970 Data = 0x00; 1971 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1972 1973 Data = 0x00; 1974 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1975 1976 Data = 0xcf; 1977 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1978 1979 /* Send the updated LCR value to the mos7840 */ 1980 Data = mos7840_port->shadowLCR; 1981 1982 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1983 1984 Data = 0x00b; 1985 mos7840_port->shadowMCR = Data; 1986 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1987 Data = 0x00b; 1988 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1989 1990 /* set up the MCR register and send it to the mos7840 */ 1991 1992 mos7840_port->shadowMCR = MCR_MASTER_IE; 1993 if (cflag & CBAUD) 1994 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1995 1996 if (cflag & CRTSCTS) 1997 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1998 else 1999 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2000 2001 Data = mos7840_port->shadowMCR; 2002 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2003 2004 /* Determine divisor based on baud rate */ 2005 baud = tty_get_baud_rate(tty); 2006 2007 if (!baud) { 2008 /* pick a default, any default... */ 2009 dbg("%s", "Picked default baud..."); 2010 baud = 9600; 2011 } 2012 2013 dbg("%s - baud rate = %d", __func__, baud); 2014 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2015 2016 /* Enable Interrupts */ 2017 Data = 0x0c; 2018 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2019 2020 if (mos7840_port->read_urb_busy == false) { 2021 mos7840_port->read_urb->dev = serial->dev; 2022 mos7840_port->read_urb_busy = true; 2023 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2024 if (status) { 2025 dbg("usb_submit_urb(read bulk) failed, status = %d", 2026 status); 2027 mos7840_port->read_urb_busy = false; 2028 } 2029 } 2030 wake_up(&mos7840_port->delta_msr_wait); 2031 mos7840_port->delta_msr_cond = 1; 2032 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", 2033 mos7840_port->shadowLCR); 2034 2035 return; 2036 } 2037 2038 /***************************************************************************** 2039 * mos7840_set_termios 2040 * this function is called by the tty driver when it wants to change 2041 * the termios structure 2042 *****************************************************************************/ 2043 2044 static void mos7840_set_termios(struct tty_struct *tty, 2045 struct usb_serial_port *port, 2046 struct ktermios *old_termios) 2047 { 2048 int status; 2049 unsigned int cflag; 2050 struct usb_serial *serial; 2051 struct moschip_port *mos7840_port; 2052 dbg("mos7840_set_termios: START"); 2053 if (mos7840_port_paranoia_check(port, __func__)) { 2054 dbg("%s", "Invalid port"); 2055 return; 2056 } 2057 2058 serial = port->serial; 2059 2060 if (mos7840_serial_paranoia_check(serial, __func__)) { 2061 dbg("%s", "Invalid Serial"); 2062 return; 2063 } 2064 2065 mos7840_port = mos7840_get_port_private(port); 2066 2067 if (mos7840_port == NULL) 2068 return; 2069 2070 if (!mos7840_port->open) { 2071 dbg("%s - port not opened", __func__); 2072 return; 2073 } 2074 2075 dbg("%s", "setting termios - "); 2076 2077 cflag = tty->termios->c_cflag; 2078 2079 dbg("%s - clfag %08x iflag %08x", __func__, 2080 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2081 dbg("%s - old clfag %08x old iflag %08x", __func__, 2082 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2083 dbg("%s - port %d", __func__, port->number); 2084 2085 /* change the port settings to the new ones specified */ 2086 2087 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2088 2089 if (!mos7840_port->read_urb) { 2090 dbg("%s", "URB KILLED !!!!!"); 2091 return; 2092 } 2093 2094 if (mos7840_port->read_urb_busy == false) { 2095 mos7840_port->read_urb->dev = serial->dev; 2096 mos7840_port->read_urb_busy = true; 2097 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2098 if (status) { 2099 dbg("usb_submit_urb(read bulk) failed, status = %d", 2100 status); 2101 mos7840_port->read_urb_busy = false; 2102 } 2103 } 2104 return; 2105 } 2106 2107 /***************************************************************************** 2108 * mos7840_get_lsr_info - get line status register info 2109 * 2110 * Purpose: Let user call ioctl() to get info when the UART physically 2111 * is emptied. On bus types like RS485, the transmitter must 2112 * release the bus after transmitting. This must be done when 2113 * the transmit shift register is empty, not be done when the 2114 * transmit holding register is empty. This functionality 2115 * allows an RS485 driver to be written in user space. 2116 *****************************************************************************/ 2117 2118 static int mos7840_get_lsr_info(struct tty_struct *tty, 2119 unsigned int __user *value) 2120 { 2121 int count; 2122 unsigned int result = 0; 2123 2124 count = mos7840_chars_in_buffer(tty); 2125 if (count == 0) { 2126 dbg("%s -- Empty", __func__); 2127 result = TIOCSER_TEMT; 2128 } 2129 2130 if (copy_to_user(value, &result, sizeof(int))) 2131 return -EFAULT; 2132 return 0; 2133 } 2134 2135 /***************************************************************************** 2136 * mos7840_get_serial_info 2137 * function to get information about serial port 2138 *****************************************************************************/ 2139 2140 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2141 struct serial_struct __user *retinfo) 2142 { 2143 struct serial_struct tmp; 2144 2145 if (mos7840_port == NULL) 2146 return -1; 2147 2148 if (!retinfo) 2149 return -EFAULT; 2150 2151 memset(&tmp, 0, sizeof(tmp)); 2152 2153 tmp.type = PORT_16550A; 2154 tmp.line = mos7840_port->port->serial->minor; 2155 tmp.port = mos7840_port->port->number; 2156 tmp.irq = 0; 2157 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2158 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2159 tmp.baud_base = 9600; 2160 tmp.close_delay = 5 * HZ; 2161 tmp.closing_wait = 30 * HZ; 2162 2163 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2164 return -EFAULT; 2165 return 0; 2166 } 2167 2168 /***************************************************************************** 2169 * SerialIoctl 2170 * this function handles any ioctl calls to the driver 2171 *****************************************************************************/ 2172 2173 static int mos7840_ioctl(struct tty_struct *tty, struct file *file, 2174 unsigned int cmd, unsigned long arg) 2175 { 2176 struct usb_serial_port *port = tty->driver_data; 2177 void __user *argp = (void __user *)arg; 2178 struct moschip_port *mos7840_port; 2179 2180 struct async_icount cnow; 2181 struct async_icount cprev; 2182 struct serial_icounter_struct icount; 2183 2184 if (mos7840_port_paranoia_check(port, __func__)) { 2185 dbg("%s", "Invalid port"); 2186 return -1; 2187 } 2188 2189 mos7840_port = mos7840_get_port_private(port); 2190 2191 if (mos7840_port == NULL) 2192 return -1; 2193 2194 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2195 2196 switch (cmd) { 2197 /* return number of bytes available */ 2198 2199 case TIOCSERGETLSR: 2200 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2201 return mos7840_get_lsr_info(tty, argp); 2202 return 0; 2203 2204 case TIOCGSERIAL: 2205 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2206 return mos7840_get_serial_info(mos7840_port, argp); 2207 2208 case TIOCSSERIAL: 2209 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2210 break; 2211 2212 case TIOCMIWAIT: 2213 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2214 cprev = mos7840_port->icount; 2215 while (1) { 2216 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2217 mos7840_port->delta_msr_cond = 0; 2218 wait_event_interruptible(mos7840_port->delta_msr_wait, 2219 (mos7840_port-> 2220 delta_msr_cond == 1)); 2221 2222 /* see if a signal did it */ 2223 if (signal_pending(current)) 2224 return -ERESTARTSYS; 2225 cnow = mos7840_port->icount; 2226 smp_rmb(); 2227 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2228 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2229 return -EIO; /* no change => error */ 2230 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2231 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2232 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2233 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2234 return 0; 2235 } 2236 cprev = cnow; 2237 } 2238 /* NOTREACHED */ 2239 break; 2240 2241 case TIOCGICOUNT: 2242 cnow = mos7840_port->icount; 2243 smp_rmb(); 2244 icount.cts = cnow.cts; 2245 icount.dsr = cnow.dsr; 2246 icount.rng = cnow.rng; 2247 icount.dcd = cnow.dcd; 2248 icount.rx = cnow.rx; 2249 icount.tx = cnow.tx; 2250 icount.frame = cnow.frame; 2251 icount.overrun = cnow.overrun; 2252 icount.parity = cnow.parity; 2253 icount.brk = cnow.brk; 2254 icount.buf_overrun = cnow.buf_overrun; 2255 2256 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2257 port->number, icount.rx, icount.tx); 2258 if (copy_to_user(argp, &icount, sizeof(icount))) 2259 return -EFAULT; 2260 return 0; 2261 default: 2262 break; 2263 } 2264 return -ENOIOCTLCMD; 2265 } 2266 2267 static int mos7840_calc_num_ports(struct usb_serial *serial) 2268 { 2269 int mos7840_num_ports = 0; 2270 2271 dbg("numberofendpoints: cur %d, alt %d", 2272 (int)serial->interface->cur_altsetting->desc.bNumEndpoints, 2273 (int)serial->interface->altsetting->desc.bNumEndpoints); 2274 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2275 mos7840_num_ports = serial->num_ports = 2; 2276 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2277 serial->num_bulk_in = 4; 2278 serial->num_bulk_out = 4; 2279 mos7840_num_ports = serial->num_ports = 4; 2280 } 2281 dbg ("mos7840_num_ports = %d", mos7840_num_ports); 2282 return mos7840_num_ports; 2283 } 2284 2285 /**************************************************************************** 2286 * mos7840_startup 2287 ****************************************************************************/ 2288 2289 static int mos7840_startup(struct usb_serial *serial) 2290 { 2291 struct moschip_port *mos7840_port; 2292 struct usb_device *dev; 2293 int i, status; 2294 2295 __u16 Data; 2296 dbg("%s", "mos7840_startup :Entering.........."); 2297 2298 if (!serial) { 2299 dbg("%s", "Invalid Handler"); 2300 return -1; 2301 } 2302 2303 dev = serial->dev; 2304 2305 dbg("%s", "Entering..."); 2306 dbg ("mos7840_startup: serial = %p", serial); 2307 2308 /* we set up the pointers to the endpoints in the mos7840_open * 2309 * function, as the structures aren't created yet. */ 2310 2311 /* set up port private structures */ 2312 for (i = 0; i < serial->num_ports; ++i) { 2313 dbg ("mos7840_startup: configuring port %d............", i); 2314 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2315 if (mos7840_port == NULL) { 2316 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2317 status = -ENOMEM; 2318 i--; /* don't follow NULL pointer cleaning up */ 2319 goto error; 2320 } 2321 2322 /* Initialize all port interrupt end point to port 0 int 2323 * endpoint. Our device has only one interrupt end point 2324 * common to all port */ 2325 2326 mos7840_port->port = serial->port[i]; 2327 mos7840_set_port_private(serial->port[i], mos7840_port); 2328 spin_lock_init(&mos7840_port->pool_lock); 2329 2330 /* minor is not initialised until later by 2331 * usb-serial.c:get_free_serial() and cannot therefore be used 2332 * to index device instances */ 2333 mos7840_port->port_num = i + 1; 2334 dbg ("serial->port[i]->number = %d", serial->port[i]->number); 2335 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); 2336 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); 2337 dbg ("serial->minor = %d", serial->minor); 2338 2339 if (mos7840_port->port_num == 1) { 2340 mos7840_port->SpRegOffset = 0x0; 2341 mos7840_port->ControlRegOffset = 0x1; 2342 mos7840_port->DcrRegOffset = 0x4; 2343 } else if ((mos7840_port->port_num == 2) 2344 && (serial->num_ports == 4)) { 2345 mos7840_port->SpRegOffset = 0x8; 2346 mos7840_port->ControlRegOffset = 0x9; 2347 mos7840_port->DcrRegOffset = 0x16; 2348 } else if ((mos7840_port->port_num == 2) 2349 && (serial->num_ports == 2)) { 2350 mos7840_port->SpRegOffset = 0xa; 2351 mos7840_port->ControlRegOffset = 0xb; 2352 mos7840_port->DcrRegOffset = 0x19; 2353 } else if ((mos7840_port->port_num == 3) 2354 && (serial->num_ports == 4)) { 2355 mos7840_port->SpRegOffset = 0xa; 2356 mos7840_port->ControlRegOffset = 0xb; 2357 mos7840_port->DcrRegOffset = 0x19; 2358 } else if ((mos7840_port->port_num == 4) 2359 && (serial->num_ports == 4)) { 2360 mos7840_port->SpRegOffset = 0xc; 2361 mos7840_port->ControlRegOffset = 0xd; 2362 mos7840_port->DcrRegOffset = 0x1c; 2363 } 2364 mos7840_dump_serial_port(mos7840_port); 2365 mos7840_set_port_private(serial->port[i], mos7840_port); 2366 2367 /* enable rx_disable bit in control register */ 2368 status = mos7840_get_reg_sync(serial->port[i], 2369 mos7840_port->ControlRegOffset, &Data); 2370 if (status < 0) { 2371 dbg("Reading ControlReg failed status-0x%x", status); 2372 break; 2373 } else 2374 dbg("ControlReg Reading success val is %x, status%d", 2375 Data, status); 2376 Data |= 0x08; /* setting driver done bit */ 2377 Data |= 0x04; /* sp1_bit to have cts change reflect in 2378 modem status reg */ 2379 2380 /* Data |= 0x20; //rx_disable bit */ 2381 status = mos7840_set_reg_sync(serial->port[i], 2382 mos7840_port->ControlRegOffset, Data); 2383 if (status < 0) { 2384 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); 2385 break; 2386 } else 2387 dbg("ControlReg Writing success(rx_disable) status%d", 2388 status); 2389 2390 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2391 and 0x24 in DCR3 */ 2392 Data = 0x01; 2393 status = mos7840_set_reg_sync(serial->port[i], 2394 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2395 if (status < 0) { 2396 dbg("Writing DCR0 failed status-0x%x", status); 2397 break; 2398 } else 2399 dbg("DCR0 Writing success status%d", status); 2400 2401 Data = 0x05; 2402 status = mos7840_set_reg_sync(serial->port[i], 2403 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2404 if (status < 0) { 2405 dbg("Writing DCR1 failed status-0x%x", status); 2406 break; 2407 } else 2408 dbg("DCR1 Writing success status%d", status); 2409 2410 Data = 0x24; 2411 status = mos7840_set_reg_sync(serial->port[i], 2412 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2413 if (status < 0) { 2414 dbg("Writing DCR2 failed status-0x%x", status); 2415 break; 2416 } else 2417 dbg("DCR2 Writing success status%d", status); 2418 2419 /* write values in clkstart0x0 and clkmulti 0x20 */ 2420 Data = 0x0; 2421 status = mos7840_set_reg_sync(serial->port[i], 2422 CLK_START_VALUE_REGISTER, Data); 2423 if (status < 0) { 2424 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); 2425 break; 2426 } else 2427 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); 2428 2429 Data = 0x20; 2430 status = mos7840_set_reg_sync(serial->port[i], 2431 CLK_MULTI_REGISTER, Data); 2432 if (status < 0) { 2433 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", 2434 status); 2435 goto error; 2436 } else 2437 dbg("CLK_MULTI_REGISTER Writing success status%d", 2438 status); 2439 2440 /* write value 0x0 to scratchpad register */ 2441 Data = 0x00; 2442 status = mos7840_set_uart_reg(serial->port[i], 2443 SCRATCH_PAD_REGISTER, Data); 2444 if (status < 0) { 2445 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", 2446 status); 2447 break; 2448 } else 2449 dbg("SCRATCH_PAD_REGISTER Writing success status%d", 2450 status); 2451 2452 /* Zero Length flag register */ 2453 if ((mos7840_port->port_num != 1) 2454 && (serial->num_ports == 2)) { 2455 2456 Data = 0xff; 2457 status = mos7840_set_reg_sync(serial->port[i], 2458 (__u16) (ZLP_REG1 + 2459 ((__u16)mos7840_port->port_num)), Data); 2460 dbg("ZLIP offset %x", 2461 (__u16) (ZLP_REG1 + 2462 ((__u16) mos7840_port->port_num))); 2463 if (status < 0) { 2464 dbg("Writing ZLP_REG%d failed status-0x%x", 2465 i + 2, status); 2466 break; 2467 } else 2468 dbg("ZLP_REG%d Writing success status%d", 2469 i + 2, status); 2470 } else { 2471 Data = 0xff; 2472 status = mos7840_set_reg_sync(serial->port[i], 2473 (__u16) (ZLP_REG1 + 2474 ((__u16)mos7840_port->port_num) - 0x1), Data); 2475 dbg("ZLIP offset %x", 2476 (__u16) (ZLP_REG1 + 2477 ((__u16) mos7840_port->port_num) - 0x1)); 2478 if (status < 0) { 2479 dbg("Writing ZLP_REG%d failed status-0x%x", 2480 i + 1, status); 2481 break; 2482 } else 2483 dbg("ZLP_REG%d Writing success status%d", 2484 i + 1, status); 2485 2486 } 2487 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2488 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2489 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2490 GFP_KERNEL); 2491 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2492 !mos7840_port->dr) { 2493 status = -ENOMEM; 2494 goto error; 2495 } 2496 } 2497 dbg ("mos7840_startup: all ports configured..........."); 2498 2499 /* Zero Length flag enable */ 2500 Data = 0x0f; 2501 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2502 if (status < 0) { 2503 dbg("Writing ZLP_REG5 failed status-0x%x", status); 2504 goto error; 2505 } else 2506 dbg("ZLP_REG5 Writing success status%d", status); 2507 2508 /* setting configuration feature to one */ 2509 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2510 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2511 return 0; 2512 error: 2513 for (/* nothing */; i >= 0; i--) { 2514 mos7840_port = mos7840_get_port_private(serial->port[i]); 2515 2516 kfree(mos7840_port->dr); 2517 kfree(mos7840_port->ctrl_buf); 2518 usb_free_urb(mos7840_port->control_urb); 2519 kfree(mos7840_port); 2520 serial->port[i] = NULL; 2521 } 2522 return status; 2523 } 2524 2525 /**************************************************************************** 2526 * mos7840_disconnect 2527 * This function is called whenever the device is removed from the usb bus. 2528 ****************************************************************************/ 2529 2530 static void mos7840_disconnect(struct usb_serial *serial) 2531 { 2532 int i; 2533 unsigned long flags; 2534 struct moschip_port *mos7840_port; 2535 dbg("%s", " disconnect :entering.........."); 2536 2537 if (!serial) { 2538 dbg("%s", "Invalid Handler"); 2539 return; 2540 } 2541 2542 /* check for the ports to be closed,close the ports and disconnect */ 2543 2544 /* free private structure allocated for serial port * 2545 * stop reads and writes on all ports */ 2546 2547 for (i = 0; i < serial->num_ports; ++i) { 2548 mos7840_port = mos7840_get_port_private(serial->port[i]); 2549 dbg ("mos7840_port %d = %p", i, mos7840_port); 2550 if (mos7840_port) { 2551 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2552 mos7840_port->zombie = 1; 2553 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2554 usb_kill_urb(mos7840_port->control_urb); 2555 } 2556 } 2557 2558 dbg("%s", "Thank u :: "); 2559 2560 } 2561 2562 /**************************************************************************** 2563 * mos7840_release 2564 * This function is called when the usb_serial structure is freed. 2565 ****************************************************************************/ 2566 2567 static void mos7840_release(struct usb_serial *serial) 2568 { 2569 int i; 2570 struct moschip_port *mos7840_port; 2571 dbg("%s", " release :entering.........."); 2572 2573 if (!serial) { 2574 dbg("%s", "Invalid Handler"); 2575 return; 2576 } 2577 2578 /* check for the ports to be closed,close the ports and disconnect */ 2579 2580 /* free private structure allocated for serial port * 2581 * stop reads and writes on all ports */ 2582 2583 for (i = 0; i < serial->num_ports; ++i) { 2584 mos7840_port = mos7840_get_port_private(serial->port[i]); 2585 dbg("mos7840_port %d = %p", i, mos7840_port); 2586 if (mos7840_port) { 2587 kfree(mos7840_port->ctrl_buf); 2588 kfree(mos7840_port->dr); 2589 kfree(mos7840_port); 2590 } 2591 } 2592 2593 dbg("%s", "Thank u :: "); 2594 2595 } 2596 2597 static struct usb_driver io_driver = { 2598 .name = "mos7840", 2599 .probe = usb_serial_probe, 2600 .disconnect = usb_serial_disconnect, 2601 .id_table = moschip_id_table_combined, 2602 .no_dynamic_id = 1, 2603 }; 2604 2605 static struct usb_serial_driver moschip7840_4port_device = { 2606 .driver = { 2607 .owner = THIS_MODULE, 2608 .name = "mos7840", 2609 }, 2610 .description = DRIVER_DESC, 2611 .usb_driver = &io_driver, 2612 .id_table = moschip_port_id_table, 2613 .num_ports = 4, 2614 .open = mos7840_open, 2615 .close = mos7840_close, 2616 .write = mos7840_write, 2617 .write_room = mos7840_write_room, 2618 .chars_in_buffer = mos7840_chars_in_buffer, 2619 .throttle = mos7840_throttle, 2620 .unthrottle = mos7840_unthrottle, 2621 .calc_num_ports = mos7840_calc_num_ports, 2622 #ifdef MCSSerialProbe 2623 .probe = mos7840_serial_probe, 2624 #endif 2625 .ioctl = mos7840_ioctl, 2626 .set_termios = mos7840_set_termios, 2627 .break_ctl = mos7840_break, 2628 .tiocmget = mos7840_tiocmget, 2629 .tiocmset = mos7840_tiocmset, 2630 .attach = mos7840_startup, 2631 .disconnect = mos7840_disconnect, 2632 .release = mos7840_release, 2633 .read_bulk_callback = mos7840_bulk_in_callback, 2634 .read_int_callback = mos7840_interrupt_callback, 2635 }; 2636 2637 /**************************************************************************** 2638 * moschip7840_init 2639 * This is called by the module subsystem, or on startup to initialize us 2640 ****************************************************************************/ 2641 static int __init moschip7840_init(void) 2642 { 2643 int retval; 2644 2645 dbg("%s", " mos7840_init :entering.........."); 2646 2647 /* Register with the usb serial */ 2648 retval = usb_serial_register(&moschip7840_4port_device); 2649 2650 if (retval) 2651 goto failed_port_device_register; 2652 2653 dbg("%s", "Entering..."); 2654 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2655 DRIVER_DESC "\n"); 2656 2657 /* Register with the usb */ 2658 retval = usb_register(&io_driver); 2659 if (retval == 0) { 2660 dbg("%s", "Leaving..."); 2661 return 0; 2662 } 2663 usb_serial_deregister(&moschip7840_4port_device); 2664 failed_port_device_register: 2665 return retval; 2666 } 2667 2668 /**************************************************************************** 2669 * moschip7840_exit 2670 * Called when the driver is about to be unloaded. 2671 ****************************************************************************/ 2672 static void __exit moschip7840_exit(void) 2673 { 2674 2675 dbg("%s", " mos7840_exit :entering.........."); 2676 2677 usb_deregister(&io_driver); 2678 2679 usb_serial_deregister(&moschip7840_4port_device); 2680 2681 dbg("%s", "Entering..."); 2682 } 2683 2684 module_init(moschip7840_init); 2685 module_exit(moschip7840_exit); 2686 2687 /* Module information */ 2688 MODULE_DESCRIPTION(DRIVER_DESC); 2689 MODULE_LICENSE("GPL"); 2690 2691 module_param(debug, bool, S_IRUGO | S_IWUSR); 2692 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2693