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, 828 struct usb_serial_port *port, struct file *filp) 829 { 830 int response; 831 int j; 832 struct usb_serial *serial; 833 struct urb *urb; 834 __u16 Data; 835 int status; 836 struct moschip_port *mos7840_port; 837 struct moschip_port *port0; 838 839 dbg ("%s enter", __func__); 840 841 if (mos7840_port_paranoia_check(port, __func__)) { 842 dbg("%s", "Port Paranoia failed"); 843 return -ENODEV; 844 } 845 846 serial = port->serial; 847 848 if (mos7840_serial_paranoia_check(serial, __func__)) { 849 dbg("%s", "Serial Paranoia failed"); 850 return -ENODEV; 851 } 852 853 mos7840_port = mos7840_get_port_private(port); 854 port0 = mos7840_get_port_private(serial->port[0]); 855 856 if (mos7840_port == NULL || port0 == NULL) 857 return -ENODEV; 858 859 usb_clear_halt(serial->dev, port->write_urb->pipe); 860 usb_clear_halt(serial->dev, port->read_urb->pipe); 861 port0->open_ports++; 862 863 /* Initialising the write urb pool */ 864 for (j = 0; j < NUM_URBS; ++j) { 865 urb = usb_alloc_urb(0, GFP_KERNEL); 866 mos7840_port->write_urb_pool[j] = urb; 867 868 if (urb == NULL) { 869 dev_err(&port->dev, "No more urbs???\n"); 870 continue; 871 } 872 873 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 874 GFP_KERNEL); 875 if (!urb->transfer_buffer) { 876 usb_free_urb(urb); 877 mos7840_port->write_urb_pool[j] = NULL; 878 dev_err(&port->dev, 879 "%s-out of memory for urb buffers.\n", 880 __func__); 881 continue; 882 } 883 } 884 885 /***************************************************************************** 886 * Initialize MCS7840 -- Write Init values to corresponding Registers 887 * 888 * Register Index 889 * 1 : IER 890 * 2 : FCR 891 * 3 : LCR 892 * 4 : MCR 893 * 894 * 0x08 : SP1/2 Control Reg 895 *****************************************************************************/ 896 897 /* NEED to check the following Block */ 898 899 Data = 0x0; 900 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 901 if (status < 0) { 902 dbg("Reading Spreg failed"); 903 return -1; 904 } 905 Data |= 0x80; 906 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 907 if (status < 0) { 908 dbg("writing Spreg failed"); 909 return -1; 910 } 911 912 Data &= ~0x80; 913 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 914 if (status < 0) { 915 dbg("writing Spreg failed"); 916 return -1; 917 } 918 /* End of block to be checked */ 919 920 Data = 0x0; 921 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 922 &Data); 923 if (status < 0) { 924 dbg("Reading Controlreg failed"); 925 return -1; 926 } 927 Data |= 0x08; /* Driver done bit */ 928 Data |= 0x20; /* rx_disable */ 929 status = mos7840_set_reg_sync(port, 930 mos7840_port->ControlRegOffset, Data); 931 if (status < 0) { 932 dbg("writing Controlreg failed"); 933 return -1; 934 } 935 /* do register settings here */ 936 /* Set all regs to the device default values. */ 937 /*********************************** 938 * First Disable all interrupts. 939 ***********************************/ 940 Data = 0x00; 941 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 942 if (status < 0) { 943 dbg("disabling interrupts failed"); 944 return -1; 945 } 946 /* Set FIFO_CONTROL_REGISTER to the default value */ 947 Data = 0x00; 948 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 949 if (status < 0) { 950 dbg("Writing FIFO_CONTROL_REGISTER failed"); 951 return -1; 952 } 953 954 Data = 0xcf; 955 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 956 if (status < 0) { 957 dbg("Writing FIFO_CONTROL_REGISTER failed"); 958 return -1; 959 } 960 961 Data = 0x03; 962 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 963 mos7840_port->shadowLCR = Data; 964 965 Data = 0x0b; 966 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 967 mos7840_port->shadowMCR = Data; 968 969 Data = 0x00; 970 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 971 mos7840_port->shadowLCR = Data; 972 973 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 974 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 975 976 Data = 0x0c; 977 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 978 979 Data = 0x0; 980 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 981 982 Data = 0x00; 983 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 984 985 Data = Data & ~SERIAL_LCR_DLAB; 986 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 987 mos7840_port->shadowLCR = Data; 988 989 /* clearing Bulkin and Bulkout Fifo */ 990 Data = 0x0; 991 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 992 993 Data = Data | 0x0c; 994 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 995 996 Data = Data & ~0x0c; 997 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 998 /* Finally enable all interrupts */ 999 Data = 0x0c; 1000 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1001 1002 /* clearing rx_disable */ 1003 Data = 0x0; 1004 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1005 &Data); 1006 Data = Data & ~0x20; 1007 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1008 Data); 1009 1010 /* rx_negate */ 1011 Data = 0x0; 1012 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1013 &Data); 1014 Data = Data | 0x10; 1015 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1016 Data); 1017 1018 /* Check to see if we've set up our endpoint info yet * 1019 * (can't set it up in mos7840_startup as the structures * 1020 * were not set up at that time.) */ 1021 if (port0->open_ports == 1) { 1022 if (serial->port[0]->interrupt_in_buffer == NULL) { 1023 /* set up interrupt urb */ 1024 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1025 serial->dev, 1026 usb_rcvintpipe(serial->dev, 1027 serial->port[0]->interrupt_in_endpointAddress), 1028 serial->port[0]->interrupt_in_buffer, 1029 serial->port[0]->interrupt_in_urb-> 1030 transfer_buffer_length, 1031 mos7840_interrupt_callback, 1032 serial, 1033 serial->port[0]->interrupt_in_urb->interval); 1034 1035 /* start interrupt read for mos7840 * 1036 * will continue as long as mos7840 is connected */ 1037 1038 response = 1039 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1040 GFP_KERNEL); 1041 if (response) { 1042 dev_err(&port->dev, "%s - Error %d submitting " 1043 "interrupt urb\n", __func__, response); 1044 } 1045 1046 } 1047 1048 } 1049 1050 /* see if we've set up our endpoint info yet * 1051 * (can't set it up in mos7840_startup as the * 1052 * structures were not set up at that time.) */ 1053 1054 dbg("port number is %d", port->number); 1055 dbg("serial number is %d", port->serial->minor); 1056 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); 1057 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); 1058 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); 1059 dbg("port's number in the device is %d", mos7840_port->port_num); 1060 mos7840_port->read_urb = port->read_urb; 1061 1062 /* set up our bulk in urb */ 1063 1064 usb_fill_bulk_urb(mos7840_port->read_urb, 1065 serial->dev, 1066 usb_rcvbulkpipe(serial->dev, 1067 port->bulk_in_endpointAddress), 1068 port->bulk_in_buffer, 1069 mos7840_port->read_urb->transfer_buffer_length, 1070 mos7840_bulk_in_callback, mos7840_port); 1071 1072 dbg("mos7840_open: bulkin endpoint is %d", 1073 port->bulk_in_endpointAddress); 1074 mos7840_port->read_urb_busy = true; 1075 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1076 if (response) { 1077 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1078 __func__, response); 1079 mos7840_port->read_urb_busy = false; 1080 } 1081 1082 /* initialize our wait queues */ 1083 init_waitqueue_head(&mos7840_port->wait_chase); 1084 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1085 1086 /* initialize our icount structure */ 1087 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1088 1089 /* initialize our port settings */ 1090 /* Must set to enable ints! */ 1091 mos7840_port->shadowMCR = MCR_MASTER_IE; 1092 /* send a open port command */ 1093 mos7840_port->open = 1; 1094 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1095 mos7840_port->icount.tx = 0; 1096 mos7840_port->icount.rx = 0; 1097 1098 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", 1099 serial, mos7840_port, port); 1100 1101 dbg ("%s leave", __func__); 1102 1103 return 0; 1104 1105 } 1106 1107 /***************************************************************************** 1108 * mos7840_chars_in_buffer 1109 * this function is called by the tty driver when it wants to know how many 1110 * bytes of data we currently have outstanding in the port (data that has 1111 * been written, but hasn't made it out the port yet) 1112 * If successful, we return the number of bytes left to be written in the 1113 * system, 1114 * Otherwise we return zero. 1115 *****************************************************************************/ 1116 1117 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1118 { 1119 struct usb_serial_port *port = tty->driver_data; 1120 int i; 1121 int chars = 0; 1122 unsigned long flags; 1123 struct moschip_port *mos7840_port; 1124 1125 dbg("%s", " mos7840_chars_in_buffer:entering ..........."); 1126 1127 if (mos7840_port_paranoia_check(port, __func__)) { 1128 dbg("%s", "Invalid port"); 1129 return 0; 1130 } 1131 1132 mos7840_port = mos7840_get_port_private(port); 1133 if (mos7840_port == NULL) { 1134 dbg("%s", "mos7840_break:leaving ..........."); 1135 return 0; 1136 } 1137 1138 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1139 for (i = 0; i < NUM_URBS; ++i) 1140 if (mos7840_port->busy[i]) 1141 chars += URB_TRANSFER_BUFFER_SIZE; 1142 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1143 dbg("%s - returns %d", __func__, chars); 1144 return chars; 1145 1146 } 1147 1148 /***************************************************************************** 1149 * mos7840_close 1150 * this function is called by the tty driver when a port is closed 1151 *****************************************************************************/ 1152 1153 static void mos7840_close(struct usb_serial_port *port) 1154 { 1155 struct usb_serial *serial; 1156 struct moschip_port *mos7840_port; 1157 struct moschip_port *port0; 1158 int j; 1159 __u16 Data; 1160 1161 dbg("%s", "mos7840_close:entering..."); 1162 1163 if (mos7840_port_paranoia_check(port, __func__)) { 1164 dbg("%s", "Port Paranoia failed"); 1165 return; 1166 } 1167 1168 serial = mos7840_get_usb_serial(port, __func__); 1169 if (!serial) { 1170 dbg("%s", "Serial Paranoia failed"); 1171 return; 1172 } 1173 1174 mos7840_port = mos7840_get_port_private(port); 1175 port0 = mos7840_get_port_private(serial->port[0]); 1176 1177 if (mos7840_port == NULL || port0 == NULL) 1178 return; 1179 1180 for (j = 0; j < NUM_URBS; ++j) 1181 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1182 1183 /* Freeing Write URBs */ 1184 for (j = 0; j < NUM_URBS; ++j) { 1185 if (mos7840_port->write_urb_pool[j]) { 1186 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1187 kfree(mos7840_port->write_urb_pool[j]-> 1188 transfer_buffer); 1189 1190 usb_free_urb(mos7840_port->write_urb_pool[j]); 1191 } 1192 } 1193 1194 /* While closing port, shutdown all bulk read, write * 1195 * and interrupt read if they exists */ 1196 if (serial->dev) { 1197 if (mos7840_port->write_urb) { 1198 dbg("%s", "Shutdown bulk write"); 1199 usb_kill_urb(mos7840_port->write_urb); 1200 } 1201 if (mos7840_port->read_urb) { 1202 dbg("%s", "Shutdown bulk read"); 1203 usb_kill_urb(mos7840_port->read_urb); 1204 mos7840_port->read_urb_busy = false; 1205 } 1206 if ((&mos7840_port->control_urb)) { 1207 dbg("%s", "Shutdown control read"); 1208 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1209 } 1210 } 1211 /* if(mos7840_port->ctrl_buf != NULL) */ 1212 /* kfree(mos7840_port->ctrl_buf); */ 1213 port0->open_ports--; 1214 dbg("mos7840_num_open_ports in close%d:in port%d", 1215 port0->open_ports, port->number); 1216 if (port0->open_ports == 0) { 1217 if (serial->port[0]->interrupt_in_urb) { 1218 dbg("%s", "Shutdown interrupt_in_urb"); 1219 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1220 } 1221 } 1222 1223 if (mos7840_port->write_urb) { 1224 /* if this urb had a transfer buffer already (old tx) free it */ 1225 if (mos7840_port->write_urb->transfer_buffer != NULL) 1226 kfree(mos7840_port->write_urb->transfer_buffer); 1227 usb_free_urb(mos7840_port->write_urb); 1228 } 1229 1230 Data = 0x0; 1231 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1232 1233 Data = 0x00; 1234 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1235 1236 mos7840_port->open = 0; 1237 1238 dbg("%s", "Leaving ............"); 1239 } 1240 1241 /************************************************************************ 1242 * 1243 * mos7840_block_until_chase_response 1244 * 1245 * This function will block the close until one of the following: 1246 * 1. Response to our Chase comes from mos7840 1247 * 2. A timeout of 10 seconds without activity has expired 1248 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1249 * 1250 ************************************************************************/ 1251 1252 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1253 struct moschip_port *mos7840_port) 1254 { 1255 int timeout = 1 * HZ; 1256 int wait = 10; 1257 int count; 1258 1259 while (1) { 1260 count = mos7840_chars_in_buffer(tty); 1261 1262 /* Check for Buffer status */ 1263 if (count <= 0) 1264 return; 1265 1266 /* Block the thread for a while */ 1267 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1268 timeout); 1269 /* No activity.. count down section */ 1270 wait--; 1271 if (wait == 0) { 1272 dbg("%s - TIMEOUT", __func__); 1273 return; 1274 } else { 1275 /* Reset timeout value back to seconds */ 1276 wait = 10; 1277 } 1278 } 1279 1280 } 1281 1282 /***************************************************************************** 1283 * mos7840_break 1284 * this function sends a break to the port 1285 *****************************************************************************/ 1286 static void mos7840_break(struct tty_struct *tty, int break_state) 1287 { 1288 struct usb_serial_port *port = tty->driver_data; 1289 unsigned char data; 1290 struct usb_serial *serial; 1291 struct moschip_port *mos7840_port; 1292 1293 dbg("%s", "Entering ..........."); 1294 dbg("mos7840_break: Start"); 1295 1296 if (mos7840_port_paranoia_check(port, __func__)) { 1297 dbg("%s", "Port Paranoia failed"); 1298 return; 1299 } 1300 1301 serial = mos7840_get_usb_serial(port, __func__); 1302 if (!serial) { 1303 dbg("%s", "Serial Paranoia failed"); 1304 return; 1305 } 1306 1307 mos7840_port = mos7840_get_port_private(port); 1308 1309 if (mos7840_port == NULL) 1310 return; 1311 1312 if (serial->dev) 1313 /* flush and block until tx is empty */ 1314 mos7840_block_until_chase_response(tty, mos7840_port); 1315 1316 if (break_state == -1) 1317 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1318 else 1319 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1320 1321 /* FIXME: no locking on shadowLCR anywhere in driver */ 1322 mos7840_port->shadowLCR = data; 1323 dbg("mcs7840_break mos7840_port->shadowLCR is %x", 1324 mos7840_port->shadowLCR); 1325 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1326 mos7840_port->shadowLCR); 1327 1328 return; 1329 } 1330 1331 /***************************************************************************** 1332 * mos7840_write_room 1333 * this function is called by the tty driver when it wants to know how many 1334 * bytes of data we can accept for a specific port. 1335 * If successful, we return the amount of room that we have for this port 1336 * Otherwise we return a negative error number. 1337 *****************************************************************************/ 1338 1339 static int mos7840_write_room(struct tty_struct *tty) 1340 { 1341 struct usb_serial_port *port = tty->driver_data; 1342 int i; 1343 int room = 0; 1344 unsigned long flags; 1345 struct moschip_port *mos7840_port; 1346 1347 dbg("%s", " mos7840_write_room:entering ..........."); 1348 1349 if (mos7840_port_paranoia_check(port, __func__)) { 1350 dbg("%s", "Invalid port"); 1351 dbg("%s", " mos7840_write_room:leaving ..........."); 1352 return -1; 1353 } 1354 1355 mos7840_port = mos7840_get_port_private(port); 1356 if (mos7840_port == NULL) { 1357 dbg("%s", "mos7840_break:leaving ..........."); 1358 return -1; 1359 } 1360 1361 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1362 for (i = 0; i < NUM_URBS; ++i) { 1363 if (!mos7840_port->busy[i]) 1364 room += URB_TRANSFER_BUFFER_SIZE; 1365 } 1366 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1367 1368 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1369 dbg("%s - returns %d", __func__, room); 1370 return room; 1371 1372 } 1373 1374 /***************************************************************************** 1375 * mos7840_write 1376 * this function is called by the tty driver when data should be written to 1377 * the port. 1378 * If successful, we return the number of bytes written, otherwise we 1379 * return a negative error number. 1380 *****************************************************************************/ 1381 1382 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1383 const unsigned char *data, int count) 1384 { 1385 int status; 1386 int i; 1387 int bytes_sent = 0; 1388 int transfer_size; 1389 unsigned long flags; 1390 1391 struct moschip_port *mos7840_port; 1392 struct usb_serial *serial; 1393 struct urb *urb; 1394 /* __u16 Data; */ 1395 const unsigned char *current_position = data; 1396 unsigned char *data1; 1397 dbg("%s", "entering ..........."); 1398 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1399 mos7840_port->shadowLCR); */ 1400 1401 #ifdef NOTMOS7840 1402 Data = 0x00; 1403 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1404 mos7840_port->shadowLCR = Data; 1405 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); 1406 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1407 mos7840_port->shadowLCR); 1408 1409 /* Data = 0x03; */ 1410 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1411 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1412 1413 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1414 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1415 1416 /* Data = 0x0c; */ 1417 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1418 Data = 0x00; 1419 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1420 dbg("mos7840_write:DLL value is %x", Data); 1421 1422 Data = 0x0; 1423 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1424 dbg("mos7840_write:DLM value is %x", Data); 1425 1426 Data = Data & ~SERIAL_LCR_DLAB; 1427 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1428 mos7840_port->shadowLCR); 1429 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1430 #endif 1431 1432 if (mos7840_port_paranoia_check(port, __func__)) { 1433 dbg("%s", "Port Paranoia failed"); 1434 return -1; 1435 } 1436 1437 serial = port->serial; 1438 if (mos7840_serial_paranoia_check(serial, __func__)) { 1439 dbg("%s", "Serial Paranoia failed"); 1440 return -1; 1441 } 1442 1443 mos7840_port = mos7840_get_port_private(port); 1444 if (mos7840_port == NULL) { 1445 dbg("%s", "mos7840_port is NULL"); 1446 return -1; 1447 } 1448 1449 /* try to find a free urb in the list */ 1450 urb = NULL; 1451 1452 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1453 for (i = 0; i < NUM_URBS; ++i) { 1454 if (!mos7840_port->busy[i]) { 1455 mos7840_port->busy[i] = 1; 1456 urb = mos7840_port->write_urb_pool[i]; 1457 dbg("URB:%d", i); 1458 break; 1459 } 1460 } 1461 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1462 1463 if (urb == NULL) { 1464 dbg("%s - no more free urbs", __func__); 1465 goto exit; 1466 } 1467 1468 if (urb->transfer_buffer == NULL) { 1469 urb->transfer_buffer = 1470 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1471 1472 if (urb->transfer_buffer == NULL) { 1473 dev_err(&port->dev, "%s no more kernel memory...\n", 1474 __func__); 1475 goto exit; 1476 } 1477 } 1478 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1479 1480 memcpy(urb->transfer_buffer, current_position, transfer_size); 1481 1482 /* fill urb with data and submit */ 1483 usb_fill_bulk_urb(urb, 1484 serial->dev, 1485 usb_sndbulkpipe(serial->dev, 1486 port->bulk_out_endpointAddress), 1487 urb->transfer_buffer, 1488 transfer_size, 1489 mos7840_bulk_out_data_callback, mos7840_port); 1490 1491 data1 = urb->transfer_buffer; 1492 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); 1493 1494 /* send it down the pipe */ 1495 status = usb_submit_urb(urb, GFP_ATOMIC); 1496 1497 if (status) { 1498 mos7840_port->busy[i] = 0; 1499 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 1500 "with status = %d\n", __func__, status); 1501 bytes_sent = status; 1502 goto exit; 1503 } 1504 bytes_sent = transfer_size; 1505 mos7840_port->icount.tx += transfer_size; 1506 smp_wmb(); 1507 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); 1508 exit: 1509 return bytes_sent; 1510 1511 } 1512 1513 /***************************************************************************** 1514 * mos7840_throttle 1515 * this function is called by the tty driver when it wants to stop the data 1516 * being read from the port. 1517 *****************************************************************************/ 1518 1519 static void mos7840_throttle(struct tty_struct *tty) 1520 { 1521 struct usb_serial_port *port = tty->driver_data; 1522 struct moschip_port *mos7840_port; 1523 int status; 1524 1525 if (mos7840_port_paranoia_check(port, __func__)) { 1526 dbg("%s", "Invalid port"); 1527 return; 1528 } 1529 1530 dbg("- port %d", port->number); 1531 1532 mos7840_port = mos7840_get_port_private(port); 1533 1534 if (mos7840_port == NULL) 1535 return; 1536 1537 if (!mos7840_port->open) { 1538 dbg("%s", "port not opened"); 1539 return; 1540 } 1541 1542 dbg("%s", "Entering .........."); 1543 1544 /* if we are implementing XON/XOFF, send the stop character */ 1545 if (I_IXOFF(tty)) { 1546 unsigned char stop_char = STOP_CHAR(tty); 1547 status = mos7840_write(tty, port, &stop_char, 1); 1548 if (status <= 0) 1549 return; 1550 } 1551 /* if we are implementing RTS/CTS, toggle that line */ 1552 if (tty->termios->c_cflag & CRTSCTS) { 1553 mos7840_port->shadowMCR &= ~MCR_RTS; 1554 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1555 mos7840_port->shadowMCR); 1556 if (status < 0) 1557 return; 1558 } 1559 1560 return; 1561 } 1562 1563 /***************************************************************************** 1564 * mos7840_unthrottle 1565 * this function is called by the tty driver when it wants to resume 1566 * the data being read from the port (called after mos7840_throttle is 1567 * called) 1568 *****************************************************************************/ 1569 static void mos7840_unthrottle(struct tty_struct *tty) 1570 { 1571 struct usb_serial_port *port = tty->driver_data; 1572 int status; 1573 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1574 1575 if (mos7840_port_paranoia_check(port, __func__)) { 1576 dbg("%s", "Invalid port"); 1577 return; 1578 } 1579 1580 if (mos7840_port == NULL) 1581 return; 1582 1583 if (!mos7840_port->open) { 1584 dbg("%s - port not opened", __func__); 1585 return; 1586 } 1587 1588 dbg("%s", "Entering .........."); 1589 1590 /* if we are implementing XON/XOFF, send the start character */ 1591 if (I_IXOFF(tty)) { 1592 unsigned char start_char = START_CHAR(tty); 1593 status = mos7840_write(tty, port, &start_char, 1); 1594 if (status <= 0) 1595 return; 1596 } 1597 1598 /* if we are implementing RTS/CTS, toggle that line */ 1599 if (tty->termios->c_cflag & CRTSCTS) { 1600 mos7840_port->shadowMCR |= MCR_RTS; 1601 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1602 mos7840_port->shadowMCR); 1603 if (status < 0) 1604 return; 1605 } 1606 } 1607 1608 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) 1609 { 1610 struct usb_serial_port *port = tty->driver_data; 1611 struct moschip_port *mos7840_port; 1612 unsigned int result; 1613 __u16 msr; 1614 __u16 mcr; 1615 int status; 1616 mos7840_port = mos7840_get_port_private(port); 1617 1618 dbg("%s - port %d", __func__, port->number); 1619 1620 if (mos7840_port == NULL) 1621 return -ENODEV; 1622 1623 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1624 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1625 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1626 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1627 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1628 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1629 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1630 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1631 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1632 1633 dbg("%s - 0x%04X", __func__, result); 1634 1635 return result; 1636 } 1637 1638 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, 1639 unsigned int set, unsigned int clear) 1640 { 1641 struct usb_serial_port *port = tty->driver_data; 1642 struct moschip_port *mos7840_port; 1643 unsigned int mcr; 1644 int status; 1645 1646 dbg("%s - port %d", __func__, port->number); 1647 1648 mos7840_port = mos7840_get_port_private(port); 1649 1650 if (mos7840_port == NULL) 1651 return -ENODEV; 1652 1653 /* FIXME: What locks the port registers ? */ 1654 mcr = mos7840_port->shadowMCR; 1655 if (clear & TIOCM_RTS) 1656 mcr &= ~MCR_RTS; 1657 if (clear & TIOCM_DTR) 1658 mcr &= ~MCR_DTR; 1659 if (clear & TIOCM_LOOP) 1660 mcr &= ~MCR_LOOPBACK; 1661 1662 if (set & TIOCM_RTS) 1663 mcr |= MCR_RTS; 1664 if (set & TIOCM_DTR) 1665 mcr |= MCR_DTR; 1666 if (set & TIOCM_LOOP) 1667 mcr |= MCR_LOOPBACK; 1668 1669 mos7840_port->shadowMCR = mcr; 1670 1671 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1672 if (status < 0) { 1673 dbg("setting MODEM_CONTROL_REGISTER Failed"); 1674 return status; 1675 } 1676 1677 return 0; 1678 } 1679 1680 /***************************************************************************** 1681 * mos7840_calc_baud_rate_divisor 1682 * this function calculates the proper baud rate divisor for the specified 1683 * baud rate. 1684 *****************************************************************************/ 1685 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1686 __u16 *clk_sel_val) 1687 { 1688 1689 dbg("%s - %d", __func__, baudRate); 1690 1691 if (baudRate <= 115200) { 1692 *divisor = 115200 / baudRate; 1693 *clk_sel_val = 0x0; 1694 } 1695 if ((baudRate > 115200) && (baudRate <= 230400)) { 1696 *divisor = 230400 / baudRate; 1697 *clk_sel_val = 0x10; 1698 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1699 *divisor = 403200 / baudRate; 1700 *clk_sel_val = 0x20; 1701 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1702 *divisor = 460800 / baudRate; 1703 *clk_sel_val = 0x30; 1704 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1705 *divisor = 806400 / baudRate; 1706 *clk_sel_val = 0x40; 1707 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1708 *divisor = 921600 / baudRate; 1709 *clk_sel_val = 0x50; 1710 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1711 *divisor = 1572864 / baudRate; 1712 *clk_sel_val = 0x60; 1713 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1714 *divisor = 3145728 / baudRate; 1715 *clk_sel_val = 0x70; 1716 } 1717 return 0; 1718 1719 #ifdef NOTMCS7840 1720 1721 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1722 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1723 *divisor = mos7840_divisor_table[i].Divisor; 1724 return 0; 1725 } 1726 } 1727 1728 /* After trying for all the standard baud rates * 1729 * Try calculating the divisor for this baud rate */ 1730 1731 if (baudrate > 75 && baudrate < 230400) { 1732 /* get the divisor */ 1733 custom = (__u16) (230400L / baudrate); 1734 1735 /* Check for round off */ 1736 round1 = (__u16) (2304000L / baudrate); 1737 round = (__u16) (round1 - (custom * 10)); 1738 if (round > 4) 1739 custom++; 1740 *divisor = custom; 1741 1742 dbg(" Baud %d = %d", baudrate, custom); 1743 return 0; 1744 } 1745 1746 dbg("%s", " Baud calculation Failed..."); 1747 return -1; 1748 #endif 1749 } 1750 1751 /***************************************************************************** 1752 * mos7840_send_cmd_write_baud_rate 1753 * this function sends the proper command to change the baud rate of the 1754 * specified port. 1755 *****************************************************************************/ 1756 1757 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1758 int baudRate) 1759 { 1760 int divisor = 0; 1761 int status; 1762 __u16 Data; 1763 unsigned char number; 1764 __u16 clk_sel_val; 1765 struct usb_serial_port *port; 1766 1767 if (mos7840_port == NULL) 1768 return -1; 1769 1770 port = (struct usb_serial_port *)mos7840_port->port; 1771 if (mos7840_port_paranoia_check(port, __func__)) { 1772 dbg("%s", "Invalid port"); 1773 return -1; 1774 } 1775 1776 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1777 dbg("%s", "Invalid Serial"); 1778 return -1; 1779 } 1780 1781 dbg("%s", "Entering .........."); 1782 1783 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1784 1785 dbg("%s - port = %d, baud = %d", __func__, 1786 mos7840_port->port->number, baudRate); 1787 /* reset clk_uart_sel in spregOffset */ 1788 if (baudRate > 115200) { 1789 #ifdef HW_flow_control 1790 /* NOTE: need to see the pther register to modify */ 1791 /* setting h/w flow control bit to 1 */ 1792 Data = 0x2b; 1793 mos7840_port->shadowMCR = Data; 1794 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1795 Data); 1796 if (status < 0) { 1797 dbg("Writing spreg failed in set_serial_baud"); 1798 return -1; 1799 } 1800 #endif 1801 1802 } else { 1803 #ifdef HW_flow_control 1804 / *setting h/w flow control bit to 0 */ 1805 Data = 0xb; 1806 mos7840_port->shadowMCR = Data; 1807 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1808 Data); 1809 if (status < 0) { 1810 dbg("Writing spreg failed in set_serial_baud"); 1811 return -1; 1812 } 1813 #endif 1814 1815 } 1816 1817 if (1) { /* baudRate <= 115200) */ 1818 clk_sel_val = 0x0; 1819 Data = 0x0; 1820 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1821 &clk_sel_val); 1822 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1823 &Data); 1824 if (status < 0) { 1825 dbg("reading spreg failed in set_serial_baud"); 1826 return -1; 1827 } 1828 Data = (Data & 0x8f) | clk_sel_val; 1829 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1830 Data); 1831 if (status < 0) { 1832 dbg("Writing spreg failed in set_serial_baud"); 1833 return -1; 1834 } 1835 /* Calculate the Divisor */ 1836 1837 if (status) { 1838 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1839 return status; 1840 } 1841 /* Enable access to divisor latch */ 1842 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1843 mos7840_port->shadowLCR = Data; 1844 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1845 1846 /* Write the divisor */ 1847 Data = (unsigned char)(divisor & 0xff); 1848 dbg("set_serial_baud Value to write DLL is %x", Data); 1849 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1850 1851 Data = (unsigned char)((divisor & 0xff00) >> 8); 1852 dbg("set_serial_baud Value to write DLM is %x", Data); 1853 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1854 1855 /* Disable access to divisor latch */ 1856 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1857 mos7840_port->shadowLCR = Data; 1858 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1859 1860 } 1861 return status; 1862 } 1863 1864 /***************************************************************************** 1865 * mos7840_change_port_settings 1866 * This routine is called to set the UART on the device to match 1867 * the specified new settings. 1868 *****************************************************************************/ 1869 1870 static void mos7840_change_port_settings(struct tty_struct *tty, 1871 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1872 { 1873 int baud; 1874 unsigned cflag; 1875 unsigned iflag; 1876 __u8 lData; 1877 __u8 lParity; 1878 __u8 lStop; 1879 int status; 1880 __u16 Data; 1881 struct usb_serial_port *port; 1882 struct usb_serial *serial; 1883 1884 if (mos7840_port == NULL) 1885 return; 1886 1887 port = (struct usb_serial_port *)mos7840_port->port; 1888 1889 if (mos7840_port_paranoia_check(port, __func__)) { 1890 dbg("%s", "Invalid port"); 1891 return; 1892 } 1893 1894 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1895 dbg("%s", "Invalid Serial"); 1896 return; 1897 } 1898 1899 serial = port->serial; 1900 1901 dbg("%s - port %d", __func__, mos7840_port->port->number); 1902 1903 if (!mos7840_port->open) { 1904 dbg("%s - port not opened", __func__); 1905 return; 1906 } 1907 1908 dbg("%s", "Entering .........."); 1909 1910 lData = LCR_BITS_8; 1911 lStop = LCR_STOP_1; 1912 lParity = LCR_PAR_NONE; 1913 1914 cflag = tty->termios->c_cflag; 1915 iflag = tty->termios->c_iflag; 1916 1917 /* Change the number of bits */ 1918 if (cflag & CSIZE) { 1919 switch (cflag & CSIZE) { 1920 case CS5: 1921 lData = LCR_BITS_5; 1922 break; 1923 1924 case CS6: 1925 lData = LCR_BITS_6; 1926 break; 1927 1928 case CS7: 1929 lData = LCR_BITS_7; 1930 break; 1931 default: 1932 case CS8: 1933 lData = LCR_BITS_8; 1934 break; 1935 } 1936 } 1937 /* Change the Parity bit */ 1938 if (cflag & PARENB) { 1939 if (cflag & PARODD) { 1940 lParity = LCR_PAR_ODD; 1941 dbg("%s - parity = odd", __func__); 1942 } else { 1943 lParity = LCR_PAR_EVEN; 1944 dbg("%s - parity = even", __func__); 1945 } 1946 1947 } else { 1948 dbg("%s - parity = none", __func__); 1949 } 1950 1951 if (cflag & CMSPAR) 1952 lParity = lParity | 0x20; 1953 1954 /* Change the Stop bit */ 1955 if (cflag & CSTOPB) { 1956 lStop = LCR_STOP_2; 1957 dbg("%s - stop bits = 2", __func__); 1958 } else { 1959 lStop = LCR_STOP_1; 1960 dbg("%s - stop bits = 1", __func__); 1961 } 1962 1963 /* Update the LCR with the correct value */ 1964 mos7840_port->shadowLCR &= 1965 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1966 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1967 1968 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", 1969 mos7840_port->shadowLCR); 1970 /* Disable Interrupts */ 1971 Data = 0x00; 1972 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1973 1974 Data = 0x00; 1975 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1976 1977 Data = 0xcf; 1978 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1979 1980 /* Send the updated LCR value to the mos7840 */ 1981 Data = mos7840_port->shadowLCR; 1982 1983 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1984 1985 Data = 0x00b; 1986 mos7840_port->shadowMCR = Data; 1987 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1988 Data = 0x00b; 1989 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1990 1991 /* set up the MCR register and send it to the mos7840 */ 1992 1993 mos7840_port->shadowMCR = MCR_MASTER_IE; 1994 if (cflag & CBAUD) 1995 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1996 1997 if (cflag & CRTSCTS) 1998 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1999 else 2000 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2001 2002 Data = mos7840_port->shadowMCR; 2003 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2004 2005 /* Determine divisor based on baud rate */ 2006 baud = tty_get_baud_rate(tty); 2007 2008 if (!baud) { 2009 /* pick a default, any default... */ 2010 dbg("%s", "Picked default baud..."); 2011 baud = 9600; 2012 } 2013 2014 dbg("%s - baud rate = %d", __func__, baud); 2015 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2016 2017 /* Enable Interrupts */ 2018 Data = 0x0c; 2019 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2020 2021 if (mos7840_port->read_urb_busy == false) { 2022 mos7840_port->read_urb->dev = serial->dev; 2023 mos7840_port->read_urb_busy = true; 2024 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2025 if (status) { 2026 dbg("usb_submit_urb(read bulk) failed, status = %d", 2027 status); 2028 mos7840_port->read_urb_busy = false; 2029 } 2030 } 2031 wake_up(&mos7840_port->delta_msr_wait); 2032 mos7840_port->delta_msr_cond = 1; 2033 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", 2034 mos7840_port->shadowLCR); 2035 2036 return; 2037 } 2038 2039 /***************************************************************************** 2040 * mos7840_set_termios 2041 * this function is called by the tty driver when it wants to change 2042 * the termios structure 2043 *****************************************************************************/ 2044 2045 static void mos7840_set_termios(struct tty_struct *tty, 2046 struct usb_serial_port *port, 2047 struct ktermios *old_termios) 2048 { 2049 int status; 2050 unsigned int cflag; 2051 struct usb_serial *serial; 2052 struct moschip_port *mos7840_port; 2053 dbg("mos7840_set_termios: START"); 2054 if (mos7840_port_paranoia_check(port, __func__)) { 2055 dbg("%s", "Invalid port"); 2056 return; 2057 } 2058 2059 serial = port->serial; 2060 2061 if (mos7840_serial_paranoia_check(serial, __func__)) { 2062 dbg("%s", "Invalid Serial"); 2063 return; 2064 } 2065 2066 mos7840_port = mos7840_get_port_private(port); 2067 2068 if (mos7840_port == NULL) 2069 return; 2070 2071 if (!mos7840_port->open) { 2072 dbg("%s - port not opened", __func__); 2073 return; 2074 } 2075 2076 dbg("%s", "setting termios - "); 2077 2078 cflag = tty->termios->c_cflag; 2079 2080 dbg("%s - clfag %08x iflag %08x", __func__, 2081 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2082 dbg("%s - old clfag %08x old iflag %08x", __func__, 2083 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2084 dbg("%s - port %d", __func__, port->number); 2085 2086 /* change the port settings to the new ones specified */ 2087 2088 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2089 2090 if (!mos7840_port->read_urb) { 2091 dbg("%s", "URB KILLED !!!!!"); 2092 return; 2093 } 2094 2095 if (mos7840_port->read_urb_busy == false) { 2096 mos7840_port->read_urb->dev = serial->dev; 2097 mos7840_port->read_urb_busy = true; 2098 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2099 if (status) { 2100 dbg("usb_submit_urb(read bulk) failed, status = %d", 2101 status); 2102 mos7840_port->read_urb_busy = false; 2103 } 2104 } 2105 return; 2106 } 2107 2108 /***************************************************************************** 2109 * mos7840_get_lsr_info - get line status register info 2110 * 2111 * Purpose: Let user call ioctl() to get info when the UART physically 2112 * is emptied. On bus types like RS485, the transmitter must 2113 * release the bus after transmitting. This must be done when 2114 * the transmit shift register is empty, not be done when the 2115 * transmit holding register is empty. This functionality 2116 * allows an RS485 driver to be written in user space. 2117 *****************************************************************************/ 2118 2119 static int mos7840_get_lsr_info(struct tty_struct *tty, 2120 unsigned int __user *value) 2121 { 2122 int count; 2123 unsigned int result = 0; 2124 2125 count = mos7840_chars_in_buffer(tty); 2126 if (count == 0) { 2127 dbg("%s -- Empty", __func__); 2128 result = TIOCSER_TEMT; 2129 } 2130 2131 if (copy_to_user(value, &result, sizeof(int))) 2132 return -EFAULT; 2133 return 0; 2134 } 2135 2136 /***************************************************************************** 2137 * mos7840_set_modem_info 2138 * function to set modem info 2139 *****************************************************************************/ 2140 2141 /* FIXME: Should be using the model control hooks */ 2142 2143 static int mos7840_set_modem_info(struct moschip_port *mos7840_port, 2144 unsigned int cmd, unsigned int __user *value) 2145 { 2146 unsigned int mcr; 2147 unsigned int arg; 2148 __u16 Data; 2149 int status; 2150 struct usb_serial_port *port; 2151 2152 if (mos7840_port == NULL) 2153 return -1; 2154 2155 port = (struct usb_serial_port *)mos7840_port->port; 2156 if (mos7840_port_paranoia_check(port, __func__)) { 2157 dbg("%s", "Invalid port"); 2158 return -1; 2159 } 2160 2161 mcr = mos7840_port->shadowMCR; 2162 2163 if (copy_from_user(&arg, value, sizeof(int))) 2164 return -EFAULT; 2165 2166 switch (cmd) { 2167 case TIOCMBIS: 2168 if (arg & TIOCM_RTS) 2169 mcr |= MCR_RTS; 2170 if (arg & TIOCM_DTR) 2171 mcr |= MCR_RTS; 2172 if (arg & TIOCM_LOOP) 2173 mcr |= MCR_LOOPBACK; 2174 break; 2175 2176 case TIOCMBIC: 2177 if (arg & TIOCM_RTS) 2178 mcr &= ~MCR_RTS; 2179 if (arg & TIOCM_DTR) 2180 mcr &= ~MCR_RTS; 2181 if (arg & TIOCM_LOOP) 2182 mcr &= ~MCR_LOOPBACK; 2183 break; 2184 2185 case TIOCMSET: 2186 /* turn off the RTS and DTR and LOOPBACK 2187 * and then only turn on what was asked to */ 2188 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); 2189 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); 2190 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); 2191 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); 2192 break; 2193 } 2194 2195 lock_kernel(); 2196 mos7840_port->shadowMCR = mcr; 2197 2198 Data = mos7840_port->shadowMCR; 2199 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2200 unlock_kernel(); 2201 if (status < 0) { 2202 dbg("setting MODEM_CONTROL_REGISTER Failed"); 2203 return -1; 2204 } 2205 2206 return 0; 2207 } 2208 2209 /***************************************************************************** 2210 * mos7840_get_modem_info 2211 * function to get modem info 2212 *****************************************************************************/ 2213 2214 static int mos7840_get_modem_info(struct moschip_port *mos7840_port, 2215 unsigned int __user *value) 2216 { 2217 unsigned int result = 0; 2218 __u16 msr; 2219 unsigned int mcr = mos7840_port->shadowMCR; 2220 mos7840_get_uart_reg(mos7840_port->port, 2221 MODEM_STATUS_REGISTER, &msr); 2222 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ 2223 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ 2224 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ 2225 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ 2226 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ 2227 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ 2228 2229 dbg("%s -- %x", __func__, result); 2230 2231 if (copy_to_user(value, &result, sizeof(int))) 2232 return -EFAULT; 2233 return 0; 2234 } 2235 2236 /***************************************************************************** 2237 * mos7840_get_serial_info 2238 * function to get information about serial port 2239 *****************************************************************************/ 2240 2241 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2242 struct serial_struct __user *retinfo) 2243 { 2244 struct serial_struct tmp; 2245 2246 if (mos7840_port == NULL) 2247 return -1; 2248 2249 if (!retinfo) 2250 return -EFAULT; 2251 2252 memset(&tmp, 0, sizeof(tmp)); 2253 2254 tmp.type = PORT_16550A; 2255 tmp.line = mos7840_port->port->serial->minor; 2256 tmp.port = mos7840_port->port->number; 2257 tmp.irq = 0; 2258 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2259 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2260 tmp.baud_base = 9600; 2261 tmp.close_delay = 5 * HZ; 2262 tmp.closing_wait = 30 * HZ; 2263 2264 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2265 return -EFAULT; 2266 return 0; 2267 } 2268 2269 /***************************************************************************** 2270 * SerialIoctl 2271 * this function handles any ioctl calls to the driver 2272 *****************************************************************************/ 2273 2274 static int mos7840_ioctl(struct tty_struct *tty, struct file *file, 2275 unsigned int cmd, unsigned long arg) 2276 { 2277 struct usb_serial_port *port = tty->driver_data; 2278 void __user *argp = (void __user *)arg; 2279 struct moschip_port *mos7840_port; 2280 2281 struct async_icount cnow; 2282 struct async_icount cprev; 2283 struct serial_icounter_struct icount; 2284 int mosret = 0; 2285 2286 if (mos7840_port_paranoia_check(port, __func__)) { 2287 dbg("%s", "Invalid port"); 2288 return -1; 2289 } 2290 2291 mos7840_port = mos7840_get_port_private(port); 2292 2293 if (mos7840_port == NULL) 2294 return -1; 2295 2296 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2297 2298 switch (cmd) { 2299 /* return number of bytes available */ 2300 2301 case TIOCSERGETLSR: 2302 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2303 return mos7840_get_lsr_info(tty, argp); 2304 return 0; 2305 2306 /* FIXME: use the modem hooks and remove this */ 2307 case TIOCMBIS: 2308 case TIOCMBIC: 2309 case TIOCMSET: 2310 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__, 2311 port->number); 2312 mosret = 2313 mos7840_set_modem_info(mos7840_port, cmd, argp); 2314 return mosret; 2315 2316 case TIOCMGET: 2317 dbg("%s (%d) TIOCMGET", __func__, port->number); 2318 return mos7840_get_modem_info(mos7840_port, argp); 2319 2320 case TIOCGSERIAL: 2321 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2322 return mos7840_get_serial_info(mos7840_port, argp); 2323 2324 case TIOCSSERIAL: 2325 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2326 break; 2327 2328 case TIOCMIWAIT: 2329 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2330 cprev = mos7840_port->icount; 2331 while (1) { 2332 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2333 mos7840_port->delta_msr_cond = 0; 2334 wait_event_interruptible(mos7840_port->delta_msr_wait, 2335 (mos7840_port-> 2336 delta_msr_cond == 1)); 2337 2338 /* see if a signal did it */ 2339 if (signal_pending(current)) 2340 return -ERESTARTSYS; 2341 cnow = mos7840_port->icount; 2342 smp_rmb(); 2343 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2344 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2345 return -EIO; /* no change => error */ 2346 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2347 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2348 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2349 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2350 return 0; 2351 } 2352 cprev = cnow; 2353 } 2354 /* NOTREACHED */ 2355 break; 2356 2357 case TIOCGICOUNT: 2358 cnow = mos7840_port->icount; 2359 smp_rmb(); 2360 icount.cts = cnow.cts; 2361 icount.dsr = cnow.dsr; 2362 icount.rng = cnow.rng; 2363 icount.dcd = cnow.dcd; 2364 icount.rx = cnow.rx; 2365 icount.tx = cnow.tx; 2366 icount.frame = cnow.frame; 2367 icount.overrun = cnow.overrun; 2368 icount.parity = cnow.parity; 2369 icount.brk = cnow.brk; 2370 icount.buf_overrun = cnow.buf_overrun; 2371 2372 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2373 port->number, icount.rx, icount.tx); 2374 if (copy_to_user(argp, &icount, sizeof(icount))) 2375 return -EFAULT; 2376 return 0; 2377 default: 2378 break; 2379 } 2380 return -ENOIOCTLCMD; 2381 } 2382 2383 static int mos7840_calc_num_ports(struct usb_serial *serial) 2384 { 2385 int mos7840_num_ports = 0; 2386 2387 dbg("numberofendpoints: cur %d, alt %d", 2388 (int)serial->interface->cur_altsetting->desc.bNumEndpoints, 2389 (int)serial->interface->altsetting->desc.bNumEndpoints); 2390 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2391 mos7840_num_ports = serial->num_ports = 2; 2392 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2393 serial->num_bulk_in = 4; 2394 serial->num_bulk_out = 4; 2395 mos7840_num_ports = serial->num_ports = 4; 2396 } 2397 dbg ("mos7840_num_ports = %d", mos7840_num_ports); 2398 return mos7840_num_ports; 2399 } 2400 2401 /**************************************************************************** 2402 * mos7840_startup 2403 ****************************************************************************/ 2404 2405 static int mos7840_startup(struct usb_serial *serial) 2406 { 2407 struct moschip_port *mos7840_port; 2408 struct usb_device *dev; 2409 int i, status; 2410 2411 __u16 Data; 2412 dbg("%s", "mos7840_startup :Entering.........."); 2413 2414 if (!serial) { 2415 dbg("%s", "Invalid Handler"); 2416 return -1; 2417 } 2418 2419 dev = serial->dev; 2420 2421 dbg("%s", "Entering..."); 2422 dbg ("mos7840_startup: serial = %p", serial); 2423 2424 /* we set up the pointers to the endpoints in the mos7840_open * 2425 * function, as the structures aren't created yet. */ 2426 2427 /* set up port private structures */ 2428 for (i = 0; i < serial->num_ports; ++i) { 2429 dbg ("mos7840_startup: configuring port %d............", i); 2430 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2431 if (mos7840_port == NULL) { 2432 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2433 status = -ENOMEM; 2434 i--; /* don't follow NULL pointer cleaning up */ 2435 goto error; 2436 } 2437 2438 /* Initialize all port interrupt end point to port 0 int 2439 * endpoint. Our device has only one interrupt end point 2440 * common to all port */ 2441 2442 mos7840_port->port = serial->port[i]; 2443 mos7840_set_port_private(serial->port[i], mos7840_port); 2444 spin_lock_init(&mos7840_port->pool_lock); 2445 2446 /* minor is not initialised until later by 2447 * usb-serial.c:get_free_serial() and cannot therefore be used 2448 * to index device instances */ 2449 mos7840_port->port_num = i + 1; 2450 dbg ("serial->port[i]->number = %d", serial->port[i]->number); 2451 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); 2452 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); 2453 dbg ("serial->minor = %d", serial->minor); 2454 2455 if (mos7840_port->port_num == 1) { 2456 mos7840_port->SpRegOffset = 0x0; 2457 mos7840_port->ControlRegOffset = 0x1; 2458 mos7840_port->DcrRegOffset = 0x4; 2459 } else if ((mos7840_port->port_num == 2) 2460 && (serial->num_ports == 4)) { 2461 mos7840_port->SpRegOffset = 0x8; 2462 mos7840_port->ControlRegOffset = 0x9; 2463 mos7840_port->DcrRegOffset = 0x16; 2464 } else if ((mos7840_port->port_num == 2) 2465 && (serial->num_ports == 2)) { 2466 mos7840_port->SpRegOffset = 0xa; 2467 mos7840_port->ControlRegOffset = 0xb; 2468 mos7840_port->DcrRegOffset = 0x19; 2469 } else if ((mos7840_port->port_num == 3) 2470 && (serial->num_ports == 4)) { 2471 mos7840_port->SpRegOffset = 0xa; 2472 mos7840_port->ControlRegOffset = 0xb; 2473 mos7840_port->DcrRegOffset = 0x19; 2474 } else if ((mos7840_port->port_num == 4) 2475 && (serial->num_ports == 4)) { 2476 mos7840_port->SpRegOffset = 0xc; 2477 mos7840_port->ControlRegOffset = 0xd; 2478 mos7840_port->DcrRegOffset = 0x1c; 2479 } 2480 mos7840_dump_serial_port(mos7840_port); 2481 mos7840_set_port_private(serial->port[i], mos7840_port); 2482 2483 /* enable rx_disable bit in control register */ 2484 status = mos7840_get_reg_sync(serial->port[i], 2485 mos7840_port->ControlRegOffset, &Data); 2486 if (status < 0) { 2487 dbg("Reading ControlReg failed status-0x%x", status); 2488 break; 2489 } else 2490 dbg("ControlReg Reading success val is %x, status%d", 2491 Data, status); 2492 Data |= 0x08; /* setting driver done bit */ 2493 Data |= 0x04; /* sp1_bit to have cts change reflect in 2494 modem status reg */ 2495 2496 /* Data |= 0x20; //rx_disable bit */ 2497 status = mos7840_set_reg_sync(serial->port[i], 2498 mos7840_port->ControlRegOffset, Data); 2499 if (status < 0) { 2500 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); 2501 break; 2502 } else 2503 dbg("ControlReg Writing success(rx_disable) status%d", 2504 status); 2505 2506 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2507 and 0x24 in DCR3 */ 2508 Data = 0x01; 2509 status = mos7840_set_reg_sync(serial->port[i], 2510 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2511 if (status < 0) { 2512 dbg("Writing DCR0 failed status-0x%x", status); 2513 break; 2514 } else 2515 dbg("DCR0 Writing success status%d", status); 2516 2517 Data = 0x05; 2518 status = mos7840_set_reg_sync(serial->port[i], 2519 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2520 if (status < 0) { 2521 dbg("Writing DCR1 failed status-0x%x", status); 2522 break; 2523 } else 2524 dbg("DCR1 Writing success status%d", status); 2525 2526 Data = 0x24; 2527 status = mos7840_set_reg_sync(serial->port[i], 2528 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2529 if (status < 0) { 2530 dbg("Writing DCR2 failed status-0x%x", status); 2531 break; 2532 } else 2533 dbg("DCR2 Writing success status%d", status); 2534 2535 /* write values in clkstart0x0 and clkmulti 0x20 */ 2536 Data = 0x0; 2537 status = mos7840_set_reg_sync(serial->port[i], 2538 CLK_START_VALUE_REGISTER, Data); 2539 if (status < 0) { 2540 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); 2541 break; 2542 } else 2543 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); 2544 2545 Data = 0x20; 2546 status = mos7840_set_reg_sync(serial->port[i], 2547 CLK_MULTI_REGISTER, Data); 2548 if (status < 0) { 2549 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", 2550 status); 2551 goto error; 2552 } else 2553 dbg("CLK_MULTI_REGISTER Writing success status%d", 2554 status); 2555 2556 /* write value 0x0 to scratchpad register */ 2557 Data = 0x00; 2558 status = mos7840_set_uart_reg(serial->port[i], 2559 SCRATCH_PAD_REGISTER, Data); 2560 if (status < 0) { 2561 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", 2562 status); 2563 break; 2564 } else 2565 dbg("SCRATCH_PAD_REGISTER Writing success status%d", 2566 status); 2567 2568 /* Zero Length flag register */ 2569 if ((mos7840_port->port_num != 1) 2570 && (serial->num_ports == 2)) { 2571 2572 Data = 0xff; 2573 status = mos7840_set_reg_sync(serial->port[i], 2574 (__u16) (ZLP_REG1 + 2575 ((__u16)mos7840_port->port_num)), Data); 2576 dbg("ZLIP offset %x", 2577 (__u16) (ZLP_REG1 + 2578 ((__u16) mos7840_port->port_num))); 2579 if (status < 0) { 2580 dbg("Writing ZLP_REG%d failed status-0x%x", 2581 i + 2, status); 2582 break; 2583 } else 2584 dbg("ZLP_REG%d Writing success status%d", 2585 i + 2, status); 2586 } else { 2587 Data = 0xff; 2588 status = mos7840_set_reg_sync(serial->port[i], 2589 (__u16) (ZLP_REG1 + 2590 ((__u16)mos7840_port->port_num) - 0x1), Data); 2591 dbg("ZLIP offset %x", 2592 (__u16) (ZLP_REG1 + 2593 ((__u16) mos7840_port->port_num) - 0x1)); 2594 if (status < 0) { 2595 dbg("Writing ZLP_REG%d failed status-0x%x", 2596 i + 1, status); 2597 break; 2598 } else 2599 dbg("ZLP_REG%d Writing success status%d", 2600 i + 1, status); 2601 2602 } 2603 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2604 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2605 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2606 GFP_KERNEL); 2607 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2608 !mos7840_port->dr) { 2609 status = -ENOMEM; 2610 goto error; 2611 } 2612 } 2613 dbg ("mos7840_startup: all ports configured..........."); 2614 2615 /* Zero Length flag enable */ 2616 Data = 0x0f; 2617 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2618 if (status < 0) { 2619 dbg("Writing ZLP_REG5 failed status-0x%x", status); 2620 goto error; 2621 } else 2622 dbg("ZLP_REG5 Writing success status%d", status); 2623 2624 /* setting configuration feature to one */ 2625 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2626 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2627 return 0; 2628 error: 2629 for (/* nothing */; i >= 0; i--) { 2630 mos7840_port = mos7840_get_port_private(serial->port[i]); 2631 2632 kfree(mos7840_port->dr); 2633 kfree(mos7840_port->ctrl_buf); 2634 usb_free_urb(mos7840_port->control_urb); 2635 kfree(mos7840_port); 2636 serial->port[i] = NULL; 2637 } 2638 return status; 2639 } 2640 2641 /**************************************************************************** 2642 * mos7840_disconnect 2643 * This function is called whenever the device is removed from the usb bus. 2644 ****************************************************************************/ 2645 2646 static void mos7840_disconnect(struct usb_serial *serial) 2647 { 2648 int i; 2649 unsigned long flags; 2650 struct moschip_port *mos7840_port; 2651 dbg("%s", " disconnect :entering.........."); 2652 2653 if (!serial) { 2654 dbg("%s", "Invalid Handler"); 2655 return; 2656 } 2657 2658 /* check for the ports to be closed,close the ports and disconnect */ 2659 2660 /* free private structure allocated for serial port * 2661 * stop reads and writes on all ports */ 2662 2663 for (i = 0; i < serial->num_ports; ++i) { 2664 mos7840_port = mos7840_get_port_private(serial->port[i]); 2665 dbg ("mos7840_port %d = %p", i, mos7840_port); 2666 if (mos7840_port) { 2667 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2668 mos7840_port->zombie = 1; 2669 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2670 usb_kill_urb(mos7840_port->control_urb); 2671 } 2672 } 2673 2674 dbg("%s", "Thank u :: "); 2675 2676 } 2677 2678 /**************************************************************************** 2679 * mos7840_release 2680 * This function is called when the usb_serial structure is freed. 2681 ****************************************************************************/ 2682 2683 static void mos7840_release(struct usb_serial *serial) 2684 { 2685 int i; 2686 struct moschip_port *mos7840_port; 2687 dbg("%s", " release :entering.........."); 2688 2689 if (!serial) { 2690 dbg("%s", "Invalid Handler"); 2691 return; 2692 } 2693 2694 /* check for the ports to be closed,close the ports and disconnect */ 2695 2696 /* free private structure allocated for serial port * 2697 * stop reads and writes on all ports */ 2698 2699 for (i = 0; i < serial->num_ports; ++i) { 2700 mos7840_port = mos7840_get_port_private(serial->port[i]); 2701 dbg("mos7840_port %d = %p", i, mos7840_port); 2702 if (mos7840_port) { 2703 kfree(mos7840_port->ctrl_buf); 2704 kfree(mos7840_port->dr); 2705 kfree(mos7840_port); 2706 } 2707 } 2708 2709 dbg("%s", "Thank u :: "); 2710 2711 } 2712 2713 static struct usb_driver io_driver = { 2714 .name = "mos7840", 2715 .probe = usb_serial_probe, 2716 .disconnect = usb_serial_disconnect, 2717 .id_table = moschip_id_table_combined, 2718 .no_dynamic_id = 1, 2719 }; 2720 2721 static struct usb_serial_driver moschip7840_4port_device = { 2722 .driver = { 2723 .owner = THIS_MODULE, 2724 .name = "mos7840", 2725 }, 2726 .description = DRIVER_DESC, 2727 .usb_driver = &io_driver, 2728 .id_table = moschip_port_id_table, 2729 .num_ports = 4, 2730 .open = mos7840_open, 2731 .close = mos7840_close, 2732 .write = mos7840_write, 2733 .write_room = mos7840_write_room, 2734 .chars_in_buffer = mos7840_chars_in_buffer, 2735 .throttle = mos7840_throttle, 2736 .unthrottle = mos7840_unthrottle, 2737 .calc_num_ports = mos7840_calc_num_ports, 2738 #ifdef MCSSerialProbe 2739 .probe = mos7840_serial_probe, 2740 #endif 2741 .ioctl = mos7840_ioctl, 2742 .set_termios = mos7840_set_termios, 2743 .break_ctl = mos7840_break, 2744 .tiocmget = mos7840_tiocmget, 2745 .tiocmset = mos7840_tiocmset, 2746 .attach = mos7840_startup, 2747 .disconnect = mos7840_disconnect, 2748 .release = mos7840_release, 2749 .read_bulk_callback = mos7840_bulk_in_callback, 2750 .read_int_callback = mos7840_interrupt_callback, 2751 }; 2752 2753 /**************************************************************************** 2754 * moschip7840_init 2755 * This is called by the module subsystem, or on startup to initialize us 2756 ****************************************************************************/ 2757 static int __init moschip7840_init(void) 2758 { 2759 int retval; 2760 2761 dbg("%s", " mos7840_init :entering.........."); 2762 2763 /* Register with the usb serial */ 2764 retval = usb_serial_register(&moschip7840_4port_device); 2765 2766 if (retval) 2767 goto failed_port_device_register; 2768 2769 dbg("%s", "Entering..."); 2770 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2771 DRIVER_DESC "\n"); 2772 2773 /* Register with the usb */ 2774 retval = usb_register(&io_driver); 2775 if (retval == 0) { 2776 dbg("%s", "Leaving..."); 2777 return 0; 2778 } 2779 usb_serial_deregister(&moschip7840_4port_device); 2780 failed_port_device_register: 2781 return retval; 2782 } 2783 2784 /**************************************************************************** 2785 * moschip7840_exit 2786 * Called when the driver is about to be unloaded. 2787 ****************************************************************************/ 2788 static void __exit moschip7840_exit(void) 2789 { 2790 2791 dbg("%s", " mos7840_exit :entering.........."); 2792 2793 usb_deregister(&io_driver); 2794 2795 usb_serial_deregister(&moschip7840_4port_device); 2796 2797 dbg("%s", "Entering..."); 2798 } 2799 2800 module_init(moschip7840_init); 2801 module_exit(moschip7840_exit); 2802 2803 /* Module information */ 2804 MODULE_DESCRIPTION(DRIVER_DESC); 2805 MODULE_LICENSE("GPL"); 2806 2807 module_param(debug, bool, S_IRUGO | S_IWUSR); 2808 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2809