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/tty.h> 30 #include <linux/tty_driver.h> 31 #include <linux/tty_flip.h> 32 #include <linux/module.h> 33 #include <linux/serial.h> 34 #include <linux/usb.h> 35 #include <linux/usb/serial.h> 36 #include <asm/uaccess.h> 37 38 /* 39 * Version Information 40 */ 41 #define DRIVER_VERSION "1.3.1" 42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 43 44 /* 45 * 16C50 UART register defines 46 */ 47 48 #define LCR_BITS_5 0x00 /* 5 bits/char */ 49 #define LCR_BITS_6 0x01 /* 6 bits/char */ 50 #define LCR_BITS_7 0x02 /* 7 bits/char */ 51 #define LCR_BITS_8 0x03 /* 8 bits/char */ 52 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 53 54 #define LCR_STOP_1 0x00 /* 1 stop bit */ 55 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 56 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 57 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 58 59 #define LCR_PAR_NONE 0x00 /* No parity */ 60 #define LCR_PAR_ODD 0x08 /* Odd parity */ 61 #define LCR_PAR_EVEN 0x18 /* Even parity */ 62 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 63 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 64 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 65 66 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 68 69 #define MCR_DTR 0x01 /* Assert DTR */ 70 #define MCR_RTS 0x02 /* Assert RTS */ 71 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 72 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 73 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 74 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 75 76 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 77 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 78 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 79 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 80 81 /* 82 * Defines used for sending commands to port 83 */ 84 85 #define WAIT_FOR_EVER (HZ * 0 ) /* timeout urb is wait for ever */ 86 #define MOS_WDR_TIMEOUT (HZ * 5 ) /* default urb timeout */ 87 88 #define MOS_PORT1 0x0200 89 #define MOS_PORT2 0x0300 90 #define MOS_VENREG 0x0000 91 #define MOS_MAX_PORT 0x02 92 #define MOS_WRITE 0x0E 93 #define MOS_READ 0x0D 94 95 /* Requests */ 96 #define MCS_RD_RTYPE 0xC0 97 #define MCS_WR_RTYPE 0x40 98 #define MCS_RDREQ 0x0D 99 #define MCS_WRREQ 0x0E 100 #define MCS_CTRL_TIMEOUT 500 101 #define VENDOR_READ_LENGTH (0x01) 102 103 #define MAX_NAME_LEN 64 104 105 #define ZLP_REG1 0x3A //Zero_Flag_Reg1 58 106 #define ZLP_REG5 0x3E //Zero_Flag_Reg5 62 107 108 /* For higher baud Rates use TIOCEXBAUD */ 109 #define TIOCEXBAUD 0x5462 110 111 /* vendor id and device id defines */ 112 113 /* The native mos7840/7820 component */ 114 #define USB_VENDOR_ID_MOSCHIP 0x9710 115 #define MOSCHIP_DEVICE_ID_7840 0x7840 116 #define MOSCHIP_DEVICE_ID_7820 0x7820 117 /* The native component can have its vendor/device id's overridden 118 * in vendor-specific implementations. Such devices can be handled 119 * by making a change here, in moschip_port_id_table, and in 120 * moschip_id_table_combined 121 */ 122 #define USB_VENDOR_ID_BANDB 0x0856 123 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 124 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 125 126 /* Interrupt Routine Defines */ 127 128 #define SERIAL_IIR_RLS 0x06 129 #define SERIAL_IIR_MS 0x00 130 131 /* 132 * Emulation of the bit mask on the LINE STATUS REGISTER. 133 */ 134 #define SERIAL_LSR_DR 0x0001 135 #define SERIAL_LSR_OE 0x0002 136 #define SERIAL_LSR_PE 0x0004 137 #define SERIAL_LSR_FE 0x0008 138 #define SERIAL_LSR_BI 0x0010 139 140 #define MOS_MSR_DELTA_CTS 0x10 141 #define MOS_MSR_DELTA_DSR 0x20 142 #define MOS_MSR_DELTA_RI 0x40 143 #define MOS_MSR_DELTA_CD 0x80 144 145 // Serial Port register Address 146 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 147 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 148 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 149 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 150 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 151 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 152 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 153 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 154 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 155 156 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 157 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 158 159 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 160 161 /* 162 * URB POOL related defines 163 */ 164 #define NUM_URBS 16 /* URB Count */ 165 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 166 167 168 static struct usb_device_id moschip_port_id_table[] = { 169 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 170 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 171 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 172 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 173 {} /* terminating entry */ 174 }; 175 176 static __devinitdata struct usb_device_id moschip_id_table_combined[] = { 177 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 178 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 179 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 180 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 181 {} /* terminating entry */ 182 }; 183 184 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); 185 186 /* This structure holds all of the local port information */ 187 188 struct moschip_port { 189 int port_num; /*Actual port number in the device(1,2,etc) */ 190 struct urb *write_urb; /* write URB for this port */ 191 struct urb *read_urb; /* read URB for this port */ 192 struct urb *int_urb; 193 __u8 shadowLCR; /* last LCR value received */ 194 __u8 shadowMCR; /* last MCR value received */ 195 char open; 196 char open_ports; 197 char zombie; 198 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 199 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 200 int delta_msr_cond; 201 struct async_icount icount; 202 struct usb_serial_port *port; /* loop back to the owner of this object */ 203 204 /*Offsets */ 205 __u8 SpRegOffset; 206 __u8 ControlRegOffset; 207 __u8 DcrRegOffset; 208 //for processing control URBS in interrupt context 209 struct urb *control_urb; 210 struct usb_ctrlrequest *dr; 211 char *ctrl_buf; 212 int MsrLsr; 213 214 spinlock_t pool_lock; 215 struct urb *write_urb_pool[NUM_URBS]; 216 char busy[NUM_URBS]; 217 }; 218 219 220 static int debug; 221 222 /* 223 * mos7840_set_reg_sync 224 * To set the Control register by calling usb_fill_control_urb function 225 * by passing usb_sndctrlpipe function as parameter. 226 */ 227 228 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 229 __u16 val) 230 { 231 struct usb_device *dev = port->serial->dev; 232 val = val & 0x00ff; 233 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 234 235 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 236 MCS_WR_RTYPE, val, reg, NULL, 0, 237 MOS_WDR_TIMEOUT); 238 } 239 240 /* 241 * mos7840_get_reg_sync 242 * To set the Uart register by calling usb_fill_control_urb function by 243 * passing usb_rcvctrlpipe function as parameter. 244 */ 245 246 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 247 __u16 * val) 248 { 249 struct usb_device *dev = port->serial->dev; 250 int ret = 0; 251 252 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 253 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, 254 MOS_WDR_TIMEOUT); 255 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val); 256 *val = (*val) & 0x00ff; 257 return ret; 258 } 259 260 /* 261 * mos7840_set_uart_reg 262 * To set the Uart register by calling usb_fill_control_urb function by 263 * passing usb_sndctrlpipe function as parameter. 264 */ 265 266 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 267 __u16 val) 268 { 269 270 struct usb_device *dev = port->serial->dev; 271 val = val & 0x00ff; 272 // For the UART control registers, the application number need to be Or'ed 273 if (port->serial->num_ports == 4) { 274 val |= 275 (((__u16) port->number - (__u16) (port->serial->minor)) + 276 1) << 8; 277 dbg("mos7840_set_uart_reg application number is %x\n", val); 278 } else { 279 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 280 val |= 281 (((__u16) port->number - 282 (__u16) (port->serial->minor)) + 1) << 8; 283 dbg("mos7840_set_uart_reg application number is %x\n", 284 val); 285 } else { 286 val |= 287 (((__u16) port->number - 288 (__u16) (port->serial->minor)) + 2) << 8; 289 dbg("mos7840_set_uart_reg application number is %x\n", 290 val); 291 } 292 } 293 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 294 MCS_WR_RTYPE, val, reg, NULL, 0, 295 MOS_WDR_TIMEOUT); 296 297 } 298 299 /* 300 * mos7840_get_uart_reg 301 * To set the Control register by calling usb_fill_control_urb function 302 * by passing usb_rcvctrlpipe function as parameter. 303 */ 304 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 305 __u16 * val) 306 { 307 struct usb_device *dev = port->serial->dev; 308 int ret = 0; 309 __u16 Wval; 310 311 //dbg("application number is %4x \n",(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); 312 /*Wval is same as application number */ 313 if (port->serial->num_ports == 4) { 314 Wval = 315 (((__u16) port->number - (__u16) (port->serial->minor)) + 316 1) << 8; 317 dbg("mos7840_get_uart_reg application number is %x\n", Wval); 318 } else { 319 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 320 Wval = 321 (((__u16) port->number - 322 (__u16) (port->serial->minor)) + 1) << 8; 323 dbg("mos7840_get_uart_reg application number is %x\n", 324 Wval); 325 } else { 326 Wval = 327 (((__u16) port->number - 328 (__u16) (port->serial->minor)) + 2) << 8; 329 dbg("mos7840_get_uart_reg application number is %x\n", 330 Wval); 331 } 332 } 333 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 334 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, 335 MOS_WDR_TIMEOUT); 336 *val = (*val) & 0x00ff; 337 return ret; 338 } 339 340 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 341 { 342 343 dbg("***************************************\n"); 344 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 345 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset); 346 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset); 347 dbg("***************************************\n"); 348 349 } 350 351 /************************************************************************/ 352 /************************************************************************/ 353 /* I N T E R F A C E F U N C T I O N S */ 354 /* I N T E R F A C E F U N C T I O N S */ 355 /************************************************************************/ 356 /************************************************************************/ 357 358 static inline void mos7840_set_port_private(struct usb_serial_port *port, 359 struct moschip_port *data) 360 { 361 usb_set_serial_port_data(port, (void *)data); 362 } 363 364 static inline struct moschip_port *mos7840_get_port_private(struct 365 usb_serial_port 366 *port) 367 { 368 return (struct moschip_port *)usb_get_serial_port_data(port); 369 } 370 371 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 372 { 373 struct moschip_port *mos7840_port; 374 struct async_icount *icount; 375 mos7840_port = port; 376 icount = &mos7840_port->icount; 377 if (new_msr & 378 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 379 MOS_MSR_DELTA_CD)) { 380 icount = &mos7840_port->icount; 381 382 /* update input line counters */ 383 if (new_msr & MOS_MSR_DELTA_CTS) { 384 icount->cts++; 385 smp_wmb(); 386 } 387 if (new_msr & MOS_MSR_DELTA_DSR) { 388 icount->dsr++; 389 smp_wmb(); 390 } 391 if (new_msr & MOS_MSR_DELTA_CD) { 392 icount->dcd++; 393 smp_wmb(); 394 } 395 if (new_msr & MOS_MSR_DELTA_RI) { 396 icount->rng++; 397 smp_wmb(); 398 } 399 } 400 } 401 402 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 403 { 404 struct async_icount *icount; 405 406 dbg("%s - %02x", __FUNCTION__, new_lsr); 407 408 if (new_lsr & SERIAL_LSR_BI) { 409 // 410 // Parity and Framing errors only count if they 411 // occur exclusive of a break being 412 // received. 413 // 414 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 415 } 416 417 /* update input line counters */ 418 icount = &port->icount; 419 if (new_lsr & SERIAL_LSR_BI) { 420 icount->brk++; 421 smp_wmb(); 422 } 423 if (new_lsr & SERIAL_LSR_OE) { 424 icount->overrun++; 425 smp_wmb(); 426 } 427 if (new_lsr & SERIAL_LSR_PE) { 428 icount->parity++; 429 smp_wmb(); 430 } 431 if (new_lsr & SERIAL_LSR_FE) { 432 icount->frame++; 433 smp_wmb(); 434 } 435 } 436 437 /************************************************************************/ 438 /************************************************************************/ 439 /* U S B C A L L B A C K F U N C T I O N S */ 440 /* U S B C A L L B A C K F U N C T I O N S */ 441 /************************************************************************/ 442 /************************************************************************/ 443 444 static void mos7840_control_callback(struct urb *urb) 445 { 446 unsigned char *data; 447 struct moschip_port *mos7840_port; 448 __u8 regval = 0x0; 449 int result = 0; 450 int status = urb->status; 451 452 mos7840_port = (struct moschip_port *)urb->context; 453 454 switch (status) { 455 case 0: 456 /* success */ 457 break; 458 case -ECONNRESET: 459 case -ENOENT: 460 case -ESHUTDOWN: 461 /* this urb is terminated, clean up */ 462 dbg("%s - urb shutting down with status: %d", __FUNCTION__, 463 status); 464 return; 465 default: 466 dbg("%s - nonzero urb status received: %d", __FUNCTION__, 467 status); 468 goto exit; 469 } 470 471 dbg("%s urb buffer size is %d\n", __FUNCTION__, urb->actual_length); 472 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __FUNCTION__, 473 mos7840_port->MsrLsr, mos7840_port->port_num); 474 data = urb->transfer_buffer; 475 regval = (__u8) data[0]; 476 dbg("%s data is %x\n", __FUNCTION__, regval); 477 if (mos7840_port->MsrLsr == 0) 478 mos7840_handle_new_msr(mos7840_port, regval); 479 else if (mos7840_port->MsrLsr == 1) 480 mos7840_handle_new_lsr(mos7840_port, regval); 481 482 exit: 483 spin_lock(&mos7840_port->pool_lock); 484 if (!mos7840_port->zombie) 485 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 486 spin_unlock(&mos7840_port->pool_lock); 487 if (result) { 488 dev_err(&urb->dev->dev, 489 "%s - Error %d submitting interrupt urb\n", 490 __FUNCTION__, result); 491 } 492 } 493 494 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 495 __u16 * val) 496 { 497 struct usb_device *dev = mcs->port->serial->dev; 498 struct usb_ctrlrequest *dr = mcs->dr; 499 unsigned char *buffer = mcs->ctrl_buf; 500 int ret; 501 502 dr->bRequestType = MCS_RD_RTYPE; 503 dr->bRequest = MCS_RDREQ; 504 dr->wValue = cpu_to_le16(Wval); //0; 505 dr->wIndex = cpu_to_le16(reg); 506 dr->wLength = cpu_to_le16(2); 507 508 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 509 (unsigned char *)dr, buffer, 2, 510 mos7840_control_callback, mcs); 511 mcs->control_urb->transfer_buffer_length = 2; 512 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 513 return ret; 514 } 515 516 /***************************************************************************** 517 * mos7840_interrupt_callback 518 * this is the callback function for when we have received data on the 519 * interrupt endpoint. 520 *****************************************************************************/ 521 522 static void mos7840_interrupt_callback(struct urb *urb) 523 { 524 int result; 525 int length; 526 struct moschip_port *mos7840_port; 527 struct usb_serial *serial; 528 __u16 Data; 529 unsigned char *data; 530 __u8 sp[5], st; 531 int i, rv = 0; 532 __u16 wval, wreg = 0; 533 int status = urb->status; 534 535 dbg("%s", " : Entering\n"); 536 537 switch (status) { 538 case 0: 539 /* success */ 540 break; 541 case -ECONNRESET: 542 case -ENOENT: 543 case -ESHUTDOWN: 544 /* this urb is terminated, clean up */ 545 dbg("%s - urb shutting down with status: %d", __FUNCTION__, 546 status); 547 return; 548 default: 549 dbg("%s - nonzero urb status received: %d", __FUNCTION__, 550 status); 551 goto exit; 552 } 553 554 length = urb->actual_length; 555 data = urb->transfer_buffer; 556 557 serial = (struct usb_serial *)urb->context; 558 559 /* Moschip get 5 bytes 560 * Byte 1 IIR Port 1 (port.number is 0) 561 * Byte 2 IIR Port 2 (port.number is 1) 562 * Byte 3 IIR Port 3 (port.number is 2) 563 * Byte 4 IIR Port 4 (port.number is 3) 564 * Byte 5 FIFO status for both */ 565 566 if (length && length > 5) { 567 dbg("%s \n", "Wrong data !!!"); 568 return; 569 } 570 571 sp[0] = (__u8) data[0]; 572 sp[1] = (__u8) data[1]; 573 sp[2] = (__u8) data[2]; 574 sp[3] = (__u8) data[3]; 575 st = (__u8) data[4]; 576 577 for (i = 0; i < serial->num_ports; i++) { 578 mos7840_port = mos7840_get_port_private(serial->port[i]); 579 wval = 580 (((__u16) serial->port[i]->number - 581 (__u16) (serial->minor)) + 1) << 8; 582 if (mos7840_port->open) { 583 if (sp[i] & 0x01) { 584 dbg("SP%d No Interrupt !!!\n", i); 585 } else { 586 switch (sp[i] & 0x0f) { 587 case SERIAL_IIR_RLS: 588 dbg("Serial Port %d: Receiver status error or ", i); 589 dbg("address bit detected in 9-bit mode\n"); 590 mos7840_port->MsrLsr = 1; 591 wreg = LINE_STATUS_REGISTER; 592 break; 593 case SERIAL_IIR_MS: 594 dbg("Serial Port %d: Modem status change\n", i); 595 mos7840_port->MsrLsr = 0; 596 wreg = MODEM_STATUS_REGISTER; 597 break; 598 } 599 spin_lock(&mos7840_port->pool_lock); 600 if (!mos7840_port->zombie) { 601 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 602 } else { 603 spin_unlock(&mos7840_port->pool_lock); 604 return; 605 } 606 spin_unlock(&mos7840_port->pool_lock); 607 } 608 } 609 } 610 if (!(rv < 0)) /* the completion handler for the control urb will resubmit */ 611 return; 612 exit: 613 result = usb_submit_urb(urb, GFP_ATOMIC); 614 if (result) { 615 dev_err(&urb->dev->dev, 616 "%s - Error %d submitting interrupt urb\n", 617 __FUNCTION__, result); 618 } 619 } 620 621 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 622 const char *function) 623 { 624 if (!port) { 625 dbg("%s - port == NULL", function); 626 return -1; 627 } 628 if (!port->serial) { 629 dbg("%s - port->serial == NULL", function); 630 return -1; 631 } 632 633 return 0; 634 } 635 636 /* Inline functions to check the sanity of a pointer that is passed to us */ 637 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 638 const char *function) 639 { 640 if (!serial) { 641 dbg("%s - serial == NULL", function); 642 return -1; 643 } 644 if (!serial->type) { 645 dbg("%s - serial->type == NULL!", function); 646 return -1; 647 } 648 649 return 0; 650 } 651 652 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 653 const char *function) 654 { 655 /* if no port was specified, or it fails a paranoia check */ 656 if (!port || 657 mos7840_port_paranoia_check(port, function) || 658 mos7840_serial_paranoia_check(port->serial, function)) { 659 /* then say that we don't have a valid usb_serial thing, which will 660 * end up genrating -ENODEV return values */ 661 return NULL; 662 } 663 664 return port->serial; 665 } 666 667 /***************************************************************************** 668 * mos7840_bulk_in_callback 669 * this is the callback function for when we have received data on the 670 * bulk in endpoint. 671 *****************************************************************************/ 672 673 static void mos7840_bulk_in_callback(struct urb *urb) 674 { 675 int retval; 676 unsigned char *data; 677 struct usb_serial *serial; 678 struct usb_serial_port *port; 679 struct moschip_port *mos7840_port; 680 struct tty_struct *tty; 681 int status = urb->status; 682 683 if (status) { 684 dbg("nonzero read bulk status received: %d", status); 685 return; 686 } 687 688 mos7840_port = (struct moschip_port *)urb->context; 689 if (!mos7840_port) { 690 dbg("%s", "NULL mos7840_port pointer \n"); 691 return; 692 } 693 694 port = (struct usb_serial_port *)mos7840_port->port; 695 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 696 dbg("%s", "Port Paranoia failed \n"); 697 return; 698 } 699 700 serial = mos7840_get_usb_serial(port, __FUNCTION__); 701 if (!serial) { 702 dbg("%s\n", "Bad serial pointer "); 703 return; 704 } 705 706 dbg("%s\n", "Entering... \n"); 707 708 data = urb->transfer_buffer; 709 710 dbg("%s", "Entering ........... \n"); 711 712 if (urb->actual_length) { 713 tty = mos7840_port->port->tty; 714 if (tty) { 715 tty_buffer_request_room(tty, urb->actual_length); 716 tty_insert_flip_string(tty, data, urb->actual_length); 717 dbg(" %s \n", data); 718 tty_flip_buffer_push(tty); 719 } 720 mos7840_port->icount.rx += urb->actual_length; 721 smp_wmb(); 722 dbg("mos7840_port->icount.rx is %d:\n", 723 mos7840_port->icount.rx); 724 } 725 726 if (!mos7840_port->read_urb) { 727 dbg("%s", "URB KILLED !!!\n"); 728 return; 729 } 730 731 732 mos7840_port->read_urb->dev = serial->dev; 733 734 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 735 736 if (retval) { 737 dbg(" usb_submit_urb(read bulk) failed, retval = %d", 738 retval); 739 } 740 } 741 742 /***************************************************************************** 743 * mos7840_bulk_out_data_callback 744 * this is the callback function for when we have finished sending serial data 745 * on the bulk out endpoint. 746 *****************************************************************************/ 747 748 static void mos7840_bulk_out_data_callback(struct urb *urb) 749 { 750 struct moschip_port *mos7840_port; 751 struct tty_struct *tty; 752 int status = urb->status; 753 int i; 754 755 mos7840_port = (struct moschip_port *)urb->context; 756 spin_lock(&mos7840_port->pool_lock); 757 for (i = 0; i < NUM_URBS; i++) { 758 if (urb == mos7840_port->write_urb_pool[i]) { 759 mos7840_port->busy[i] = 0; 760 break; 761 } 762 } 763 spin_unlock(&mos7840_port->pool_lock); 764 765 if (status) { 766 dbg("nonzero write bulk status received:%d\n", status); 767 return; 768 } 769 770 if (mos7840_port_paranoia_check(mos7840_port->port, __FUNCTION__)) { 771 dbg("%s", "Port Paranoia failed \n"); 772 return; 773 } 774 775 dbg("%s \n", "Entering ........."); 776 777 tty = mos7840_port->port->tty; 778 779 if (tty && mos7840_port->open) 780 tty_wakeup(tty); 781 782 } 783 784 /************************************************************************/ 785 /* 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 */ 786 /************************************************************************/ 787 #ifdef MCSSerialProbe 788 static int mos7840_serial_probe(struct usb_serial *serial, 789 const struct usb_device_id *id) 790 { 791 792 /*need to implement the mode_reg reading and updating\ 793 structures usb_serial_ device_type\ 794 (i.e num_ports, num_bulkin,bulkout etc) */ 795 /* Also we can update the changes attach */ 796 return 1; 797 } 798 #endif 799 800 /***************************************************************************** 801 * mos7840_open 802 * this function is called by the tty driver when a port is opened 803 * If successful, we return 0 804 * Otherwise we return a negative error number. 805 *****************************************************************************/ 806 807 static int mos7840_open(struct usb_serial_port *port, struct file *filp) 808 { 809 int response; 810 int j; 811 struct usb_serial *serial; 812 struct urb *urb; 813 __u16 Data; 814 int status; 815 struct moschip_port *mos7840_port; 816 struct moschip_port *port0; 817 818 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 819 dbg("%s", "Port Paranoia failed \n"); 820 return -ENODEV; 821 } 822 823 serial = port->serial; 824 825 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) { 826 dbg("%s", "Serial Paranoia failed \n"); 827 return -ENODEV; 828 } 829 830 mos7840_port = mos7840_get_port_private(port); 831 port0 = mos7840_get_port_private(serial->port[0]); 832 833 if (mos7840_port == NULL || port0 == NULL) 834 return -ENODEV; 835 836 usb_clear_halt(serial->dev, port->write_urb->pipe); 837 usb_clear_halt(serial->dev, port->read_urb->pipe); 838 port0->open_ports++; 839 840 /* Initialising the write urb pool */ 841 for (j = 0; j < NUM_URBS; ++j) { 842 urb = usb_alloc_urb(0, GFP_KERNEL); 843 mos7840_port->write_urb_pool[j] = urb; 844 845 if (urb == NULL) { 846 err("No more urbs???"); 847 continue; 848 } 849 850 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 851 if (!urb->transfer_buffer) { 852 usb_free_urb(urb); 853 mos7840_port->write_urb_pool[j] = NULL; 854 err("%s-out of memory for urb buffers.", __FUNCTION__); 855 continue; 856 } 857 } 858 859 /***************************************************************************** 860 * Initialize MCS7840 -- Write Init values to corresponding Registers 861 * 862 * Register Index 863 * 1 : IER 864 * 2 : FCR 865 * 3 : LCR 866 * 4 : MCR 867 * 868 * 0x08 : SP1/2 Control Reg 869 *****************************************************************************/ 870 871 //NEED to check the following Block 872 873 status = 0; 874 Data = 0x0; 875 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 876 if (status < 0) { 877 dbg("Reading Spreg failed\n"); 878 return -1; 879 } 880 Data |= 0x80; 881 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 882 if (status < 0) { 883 dbg("writing Spreg failed\n"); 884 return -1; 885 } 886 887 Data &= ~0x80; 888 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 889 if (status < 0) { 890 dbg("writing Spreg failed\n"); 891 return -1; 892 } 893 //End of block to be checked 894 895 status = 0; 896 Data = 0x0; 897 status = 898 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); 899 if (status < 0) { 900 dbg("Reading Controlreg failed\n"); 901 return -1; 902 } 903 Data |= 0x08; //Driver done bit 904 Data |= 0x20; //rx_disable 905 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); 906 if (status < 0) { 907 dbg("writing Controlreg failed\n"); 908 return -1; 909 } 910 //do register settings here 911 // Set all regs to the device default values. 912 //////////////////////////////////// 913 // First Disable all interrupts. 914 //////////////////////////////////// 915 916 Data = 0x00; 917 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 918 if (status < 0) { 919 dbg("disableing interrupts failed\n"); 920 return -1; 921 } 922 // Set FIFO_CONTROL_REGISTER to the default value 923 Data = 0x00; 924 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 925 if (status < 0) { 926 dbg("Writing FIFO_CONTROL_REGISTER failed\n"); 927 return -1; 928 } 929 930 Data = 0xcf; 931 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 932 if (status < 0) { 933 dbg("Writing FIFO_CONTROL_REGISTER failed\n"); 934 return -1; 935 } 936 937 Data = 0x03; 938 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 939 mos7840_port->shadowLCR = Data; 940 941 Data = 0x0b; 942 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 943 mos7840_port->shadowMCR = Data; 944 945 Data = 0x00; 946 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 947 mos7840_port->shadowLCR = Data; 948 949 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80 950 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 951 952 Data = 0x0c; 953 status = 0; 954 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 955 956 Data = 0x0; 957 status = 0; 958 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 959 960 Data = 0x00; 961 status = 0; 962 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 963 964 Data = Data & ~SERIAL_LCR_DLAB; 965 status = 0; 966 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 967 mos7840_port->shadowLCR = Data; 968 969 //clearing Bulkin and Bulkout Fifo 970 Data = 0x0; 971 status = 0; 972 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 973 974 Data = Data | 0x0c; 975 status = 0; 976 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 977 978 Data = Data & ~0x0c; 979 status = 0; 980 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 981 //Finally enable all interrupts 982 Data = 0x0; 983 Data = 0x0c; 984 status = 0; 985 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 986 987 //clearing rx_disable 988 Data = 0x0; 989 status = 0; 990 status = 991 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); 992 Data = Data & ~0x20; 993 status = 0; 994 status = 995 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); 996 997 // rx_negate 998 Data = 0x0; 999 status = 0; 1000 status = 1001 mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); 1002 Data = Data | 0x10; 1003 status = 0; 1004 status = 1005 mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); 1006 1007 /* force low_latency on so that our tty_push actually forces * 1008 * the data through,otherwise it is scheduled, and with * 1009 * high data rates (like with OHCI) data can get lost. */ 1010 1011 if (port->tty) 1012 port->tty->low_latency = 1; 1013 /* Check to see if we've set up our endpoint info yet * 1014 * (can't set it up in mos7840_startup as the structures * 1015 * were not set up at that time.) */ 1016 if (port0->open_ports == 1) { 1017 if (serial->port[0]->interrupt_in_buffer == NULL) { 1018 1019 /* set up interrupt urb */ 1020 1021 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1022 serial->dev, 1023 usb_rcvintpipe(serial->dev, 1024 serial->port[0]-> 1025 interrupt_in_endpointAddress), 1026 serial->port[0]->interrupt_in_buffer, 1027 serial->port[0]->interrupt_in_urb-> 1028 transfer_buffer_length, 1029 mos7840_interrupt_callback, 1030 serial, 1031 serial->port[0]->interrupt_in_urb-> 1032 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 err("%s - Error %d submitting interrupt urb", 1042 __FUNCTION__, 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 \n", port->number); 1054 dbg("serial number is %d \n", port->serial->minor); 1055 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress); 1056 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress); 1057 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress); 1058 dbg("port's number in the device is %d\n", 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\n", 1072 port->bulk_in_endpointAddress); 1073 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1074 if (response) { 1075 err("%s - Error %d submitting control urb", __FUNCTION__, 1076 response); 1077 } 1078 1079 /* initialize our wait queues */ 1080 init_waitqueue_head(&mos7840_port->wait_chase); 1081 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1082 1083 /* initialize our icount structure */ 1084 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1085 1086 /* initialize our port settings */ 1087 mos7840_port->shadowMCR = MCR_MASTER_IE; /* Must set to enable ints! */ 1088 /* send a open port command */ 1089 mos7840_port->open = 1; 1090 //mos7840_change_port_settings(mos7840_port,old_termios); 1091 mos7840_port->icount.tx = 0; 1092 mos7840_port->icount.rx = 0; 1093 1094 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", serial, mos7840_port, port); 1095 1096 return 0; 1097 1098 } 1099 1100 /***************************************************************************** 1101 * mos7840_chars_in_buffer 1102 * this function is called by the tty driver when it wants to know how many 1103 * bytes of data we currently have outstanding in the port (data that has 1104 * been written, but hasn't made it out the port yet) 1105 * If successful, we return the number of bytes left to be written in the 1106 * system, 1107 * Otherwise we return a negative error number. 1108 *****************************************************************************/ 1109 1110 static int mos7840_chars_in_buffer(struct usb_serial_port *port) 1111 { 1112 int i; 1113 int chars = 0; 1114 unsigned long flags; 1115 struct moschip_port *mos7840_port; 1116 1117 dbg("%s \n", " mos7840_chars_in_buffer:entering ..........."); 1118 1119 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 1120 dbg("%s", "Invalid port \n"); 1121 return -1; 1122 } 1123 1124 mos7840_port = mos7840_get_port_private(port); 1125 if (mos7840_port == NULL) { 1126 dbg("%s \n", "mos7840_break:leaving ..........."); 1127 return -1; 1128 } 1129 1130 spin_lock_irqsave(&mos7840_port->pool_lock,flags); 1131 for (i = 0; i < NUM_URBS; ++i) { 1132 if (mos7840_port->busy[i]) { 1133 chars += URB_TRANSFER_BUFFER_SIZE; 1134 } 1135 } 1136 spin_unlock_irqrestore(&mos7840_port->pool_lock,flags); 1137 dbg("%s - returns %d", __FUNCTION__, chars); 1138 return chars; 1139 1140 } 1141 1142 /************************************************************************ 1143 * 1144 * mos7840_block_until_tx_empty 1145 * 1146 * This function will block the close until one of the following: 1147 * 1. TX count are 0 1148 * 2. The mos7840 has stopped 1149 * 3. A timeout of 3 seconds without activity has expired 1150 * 1151 ************************************************************************/ 1152 static void mos7840_block_until_tx_empty(struct moschip_port *mos7840_port) 1153 { 1154 int timeout = HZ / 10; 1155 int wait = 30; 1156 int count; 1157 1158 while (1) { 1159 1160 count = mos7840_chars_in_buffer(mos7840_port->port); 1161 1162 /* Check for Buffer status */ 1163 if (count <= 0) { 1164 return; 1165 } 1166 1167 /* Block the thread for a while */ 1168 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1169 timeout); 1170 1171 /* No activity.. count down section */ 1172 wait--; 1173 if (wait == 0) { 1174 dbg("%s - TIMEOUT", __FUNCTION__); 1175 return; 1176 } else { 1177 /* Reset timeout value back to seconds */ 1178 wait = 30; 1179 } 1180 } 1181 } 1182 1183 /***************************************************************************** 1184 * mos7840_close 1185 * this function is called by the tty driver when a port is closed 1186 *****************************************************************************/ 1187 1188 static void mos7840_close(struct usb_serial_port *port, struct file *filp) 1189 { 1190 struct usb_serial *serial; 1191 struct moschip_port *mos7840_port; 1192 struct moschip_port *port0; 1193 int j; 1194 __u16 Data; 1195 1196 dbg("%s\n", "mos7840_close:entering..."); 1197 1198 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 1199 dbg("%s", "Port Paranoia failed \n"); 1200 return; 1201 } 1202 1203 serial = mos7840_get_usb_serial(port, __FUNCTION__); 1204 if (!serial) { 1205 dbg("%s", "Serial Paranoia failed \n"); 1206 return; 1207 } 1208 1209 mos7840_port = mos7840_get_port_private(port); 1210 port0 = mos7840_get_port_private(serial->port[0]); 1211 1212 if (mos7840_port == NULL || port0 == NULL) 1213 return; 1214 1215 for (j = 0; j < NUM_URBS; ++j) 1216 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1217 1218 /* Freeing Write URBs */ 1219 for (j = 0; j < NUM_URBS; ++j) { 1220 if (mos7840_port->write_urb_pool[j]) { 1221 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1222 kfree(mos7840_port->write_urb_pool[j]-> 1223 transfer_buffer); 1224 1225 usb_free_urb(mos7840_port->write_urb_pool[j]); 1226 } 1227 } 1228 1229 if (serial->dev) { 1230 /* flush and block until tx is empty */ 1231 mos7840_block_until_tx_empty(mos7840_port); 1232 } 1233 1234 /* While closing port, shutdown all bulk read, write * 1235 * and interrupt read if they exists */ 1236 if (serial->dev) { 1237 1238 if (mos7840_port->write_urb) { 1239 dbg("%s", "Shutdown bulk write\n"); 1240 usb_kill_urb(mos7840_port->write_urb); 1241 } 1242 1243 if (mos7840_port->read_urb) { 1244 dbg("%s", "Shutdown bulk read\n"); 1245 usb_kill_urb(mos7840_port->read_urb); 1246 } 1247 if ((&mos7840_port->control_urb)) { 1248 dbg("%s", "Shutdown control read\n"); 1249 // usb_kill_urb (mos7840_port->control_urb); 1250 1251 } 1252 } 1253 // if(mos7840_port->ctrl_buf != NULL) 1254 // kfree(mos7840_port->ctrl_buf); 1255 port0->open_ports--; 1256 dbg("mos7840_num_open_ports in close%d:in port%d\n", 1257 port0->open_ports, port->number); 1258 if (port0->open_ports == 0) { 1259 if (serial->port[0]->interrupt_in_urb) { 1260 dbg("%s", "Shutdown interrupt_in_urb\n"); 1261 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1262 } 1263 } 1264 1265 if (mos7840_port->write_urb) { 1266 /* if this urb had a transfer buffer already (old tx) free it */ 1267 1268 if (mos7840_port->write_urb->transfer_buffer != NULL) { 1269 kfree(mos7840_port->write_urb->transfer_buffer); 1270 } 1271 usb_free_urb(mos7840_port->write_urb); 1272 } 1273 1274 Data = 0x0; 1275 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1276 1277 Data = 0x00; 1278 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1279 1280 mos7840_port->open = 0; 1281 1282 dbg("%s \n", "Leaving ............"); 1283 } 1284 1285 /************************************************************************ 1286 * 1287 * mos7840_block_until_chase_response 1288 * 1289 * This function will block the close until one of the following: 1290 * 1. Response to our Chase comes from mos7840 1291 * 2. A timeout of 10 seconds without activity has expired 1292 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1293 * 1294 ************************************************************************/ 1295 1296 static void mos7840_block_until_chase_response(struct moschip_port 1297 *mos7840_port) 1298 { 1299 int timeout = 1 * HZ; 1300 int wait = 10; 1301 int count; 1302 1303 while (1) { 1304 count = mos7840_chars_in_buffer(mos7840_port->port); 1305 1306 /* Check for Buffer status */ 1307 if (count <= 0) { 1308 return; 1309 } 1310 1311 /* Block the thread for a while */ 1312 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1313 timeout); 1314 /* No activity.. count down section */ 1315 wait--; 1316 if (wait == 0) { 1317 dbg("%s - TIMEOUT", __FUNCTION__); 1318 return; 1319 } else { 1320 /* Reset timeout value back to seconds */ 1321 wait = 10; 1322 } 1323 } 1324 1325 } 1326 1327 /***************************************************************************** 1328 * mos7840_break 1329 * this function sends a break to the port 1330 *****************************************************************************/ 1331 static void mos7840_break(struct usb_serial_port *port, int break_state) 1332 { 1333 unsigned char data; 1334 struct usb_serial *serial; 1335 struct moschip_port *mos7840_port; 1336 1337 dbg("%s \n", "Entering ..........."); 1338 dbg("mos7840_break: Start\n"); 1339 1340 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 1341 dbg("%s", "Port Paranoia failed \n"); 1342 return; 1343 } 1344 1345 serial = mos7840_get_usb_serial(port, __FUNCTION__); 1346 if (!serial) { 1347 dbg("%s", "Serial Paranoia failed \n"); 1348 return; 1349 } 1350 1351 mos7840_port = mos7840_get_port_private(port); 1352 1353 if (mos7840_port == NULL) { 1354 return; 1355 } 1356 1357 if (serial->dev) { 1358 1359 /* flush and block until tx is empty */ 1360 mos7840_block_until_chase_response(mos7840_port); 1361 } 1362 1363 if (break_state == -1) { 1364 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1365 } else { 1366 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1367 } 1368 1369 mos7840_port->shadowLCR = data; 1370 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n", 1371 mos7840_port->shadowLCR); 1372 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1373 mos7840_port->shadowLCR); 1374 1375 return; 1376 } 1377 1378 /***************************************************************************** 1379 * mos7840_write_room 1380 * this function is called by the tty driver when it wants to know how many 1381 * bytes of data we can accept for a specific port. 1382 * If successful, we return the amount of room that we have for this port 1383 * Otherwise we return a negative error number. 1384 *****************************************************************************/ 1385 1386 static int mos7840_write_room(struct usb_serial_port *port) 1387 { 1388 int i; 1389 int room = 0; 1390 unsigned long flags; 1391 struct moschip_port *mos7840_port; 1392 1393 dbg("%s \n", " mos7840_write_room:entering ..........."); 1394 1395 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 1396 dbg("%s", "Invalid port \n"); 1397 dbg("%s \n", " mos7840_write_room:leaving ..........."); 1398 return -1; 1399 } 1400 1401 mos7840_port = mos7840_get_port_private(port); 1402 if (mos7840_port == NULL) { 1403 dbg("%s \n", "mos7840_break:leaving ..........."); 1404 return -1; 1405 } 1406 1407 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1408 for (i = 0; i < NUM_URBS; ++i) { 1409 if (!mos7840_port->busy[i]) { 1410 room += URB_TRANSFER_BUFFER_SIZE; 1411 } 1412 } 1413 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1414 1415 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1416 dbg("%s - returns %d", __FUNCTION__, room); 1417 return room; 1418 1419 } 1420 1421 /***************************************************************************** 1422 * mos7840_write 1423 * this function is called by the tty driver when data should be written to 1424 * the port. 1425 * If successful, we return the number of bytes written, otherwise we 1426 * return a negative error number. 1427 *****************************************************************************/ 1428 1429 static int mos7840_write(struct usb_serial_port *port, 1430 const unsigned char *data, int count) 1431 { 1432 int status; 1433 int i; 1434 int bytes_sent = 0; 1435 int transfer_size; 1436 unsigned long flags; 1437 1438 struct moschip_port *mos7840_port; 1439 struct usb_serial *serial; 1440 struct urb *urb; 1441 //__u16 Data; 1442 const unsigned char *current_position = data; 1443 unsigned char *data1; 1444 dbg("%s \n", "entering ..........."); 1445 //dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",mos7840_port->shadowLCR); 1446 1447 #ifdef NOTMOS7840 1448 Data = 0x00; 1449 status = 0; 1450 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1451 mos7840_port->shadowLCR = Data; 1452 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data); 1453 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1454 mos7840_port->shadowLCR); 1455 1456 //Data = 0x03; 1457 //status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); 1458 //mos7840_port->shadowLCR=Data;//Need to add later 1459 1460 Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80 1461 status = 0; 1462 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1463 1464 //Data = 0x0c; 1465 //status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); 1466 Data = 0x00; 1467 status = 0; 1468 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1469 dbg("mos7840_write:DLL value is %x\n", Data); 1470 1471 Data = 0x0; 1472 status = 0; 1473 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1474 dbg("mos7840_write:DLM value is %x\n", Data); 1475 1476 Data = Data & ~SERIAL_LCR_DLAB; 1477 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1478 mos7840_port->shadowLCR); 1479 status = 0; 1480 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1481 #endif 1482 1483 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 1484 dbg("%s", "Port Paranoia failed \n"); 1485 return -1; 1486 } 1487 1488 serial = port->serial; 1489 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) { 1490 dbg("%s", "Serial Paranoia failed \n"); 1491 return -1; 1492 } 1493 1494 mos7840_port = mos7840_get_port_private(port); 1495 if (mos7840_port == NULL) { 1496 dbg("%s", "mos7840_port is NULL\n"); 1497 return -1; 1498 } 1499 1500 /* try to find a free urb in the list */ 1501 urb = NULL; 1502 1503 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1504 for (i = 0; i < NUM_URBS; ++i) { 1505 if (!mos7840_port->busy[i]) { 1506 mos7840_port->busy[i] = 1; 1507 urb = mos7840_port->write_urb_pool[i]; 1508 dbg("\nURB:%d", i); 1509 break; 1510 } 1511 } 1512 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1513 1514 if (urb == NULL) { 1515 dbg("%s - no more free urbs", __FUNCTION__); 1516 goto exit; 1517 } 1518 1519 if (urb->transfer_buffer == NULL) { 1520 urb->transfer_buffer = 1521 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1522 1523 if (urb->transfer_buffer == NULL) { 1524 err("%s no more kernel memory...", __FUNCTION__); 1525 goto exit; 1526 } 1527 } 1528 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1529 1530 memcpy(urb->transfer_buffer, current_position, transfer_size); 1531 1532 /* fill urb with data and submit */ 1533 usb_fill_bulk_urb(urb, 1534 serial->dev, 1535 usb_sndbulkpipe(serial->dev, 1536 port->bulk_out_endpointAddress), 1537 urb->transfer_buffer, 1538 transfer_size, 1539 mos7840_bulk_out_data_callback, mos7840_port); 1540 1541 data1 = urb->transfer_buffer; 1542 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress); 1543 1544 /* send it down the pipe */ 1545 status = usb_submit_urb(urb, GFP_ATOMIC); 1546 1547 if (status) { 1548 mos7840_port->busy[i] = 0; 1549 err("%s - usb_submit_urb(write bulk) failed with status = %d", 1550 __FUNCTION__, status); 1551 bytes_sent = status; 1552 goto exit; 1553 } 1554 bytes_sent = transfer_size; 1555 mos7840_port->icount.tx += transfer_size; 1556 smp_wmb(); 1557 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); 1558 exit: 1559 1560 return bytes_sent; 1561 1562 } 1563 1564 /***************************************************************************** 1565 * mos7840_throttle 1566 * this function is called by the tty driver when it wants to stop the data 1567 * being read from the port. 1568 *****************************************************************************/ 1569 1570 static void mos7840_throttle(struct usb_serial_port *port) 1571 { 1572 struct moschip_port *mos7840_port; 1573 struct tty_struct *tty; 1574 int status; 1575 1576 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 1577 dbg("%s", "Invalid port \n"); 1578 return; 1579 } 1580 1581 dbg("- port %d\n", port->number); 1582 1583 mos7840_port = mos7840_get_port_private(port); 1584 1585 if (mos7840_port == NULL) 1586 return; 1587 1588 if (!mos7840_port->open) { 1589 dbg("%s\n", "port not opened"); 1590 return; 1591 } 1592 1593 dbg("%s", "Entering .......... \n"); 1594 1595 tty = port->tty; 1596 if (!tty) { 1597 dbg("%s - no tty available", __FUNCTION__); 1598 return; 1599 } 1600 1601 /* if we are implementing XON/XOFF, send the stop character */ 1602 if (I_IXOFF(tty)) { 1603 unsigned char stop_char = STOP_CHAR(tty); 1604 status = mos7840_write(port, &stop_char, 1); 1605 if (status <= 0) { 1606 return; 1607 } 1608 } 1609 1610 /* if we are implementing RTS/CTS, toggle that line */ 1611 if (tty->termios->c_cflag & CRTSCTS) { 1612 mos7840_port->shadowMCR &= ~MCR_RTS; 1613 status = 0; 1614 status = 1615 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1616 mos7840_port->shadowMCR); 1617 1618 if (status < 0) { 1619 return; 1620 } 1621 } 1622 1623 return; 1624 } 1625 1626 /***************************************************************************** 1627 * mos7840_unthrottle 1628 * this function is called by the tty driver when it wants to resume the data 1629 * being read from the port (called after SerialThrottle is called) 1630 *****************************************************************************/ 1631 static void mos7840_unthrottle(struct usb_serial_port *port) 1632 { 1633 struct tty_struct *tty; 1634 int status; 1635 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1636 1637 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 1638 dbg("%s", "Invalid port \n"); 1639 return; 1640 } 1641 1642 if (mos7840_port == NULL) 1643 return; 1644 1645 if (!mos7840_port->open) { 1646 dbg("%s - port not opened", __FUNCTION__); 1647 return; 1648 } 1649 1650 dbg("%s", "Entering .......... \n"); 1651 1652 tty = port->tty; 1653 if (!tty) { 1654 dbg("%s - no tty available", __FUNCTION__); 1655 return; 1656 } 1657 1658 /* if we are implementing XON/XOFF, send the start character */ 1659 if (I_IXOFF(tty)) { 1660 unsigned char start_char = START_CHAR(tty); 1661 status = mos7840_write(port, &start_char, 1); 1662 if (status <= 0) { 1663 return; 1664 } 1665 } 1666 1667 /* if we are implementing RTS/CTS, toggle that line */ 1668 if (tty->termios->c_cflag & CRTSCTS) { 1669 mos7840_port->shadowMCR |= MCR_RTS; 1670 status = 0; 1671 status = 1672 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1673 mos7840_port->shadowMCR); 1674 if (status < 0) { 1675 return; 1676 } 1677 } 1678 1679 return; 1680 } 1681 1682 static int mos7840_tiocmget(struct usb_serial_port *port, struct file *file) 1683 { 1684 struct moschip_port *mos7840_port; 1685 unsigned int result; 1686 __u16 msr; 1687 __u16 mcr; 1688 int status = 0; 1689 mos7840_port = mos7840_get_port_private(port); 1690 1691 dbg("%s - port %d", __FUNCTION__, port->number); 1692 1693 if (mos7840_port == NULL) 1694 return -ENODEV; 1695 1696 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1697 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1698 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1699 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1700 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1701 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1702 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1703 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1704 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1705 1706 dbg("%s - 0x%04X", __FUNCTION__, result); 1707 1708 return result; 1709 } 1710 1711 static int mos7840_tiocmset(struct usb_serial_port *port, struct file *file, 1712 unsigned int set, unsigned int clear) 1713 { 1714 struct moschip_port *mos7840_port; 1715 unsigned int mcr; 1716 unsigned int status; 1717 1718 dbg("%s - port %d", __FUNCTION__, port->number); 1719 1720 mos7840_port = mos7840_get_port_private(port); 1721 1722 if (mos7840_port == NULL) 1723 return -ENODEV; 1724 1725 mcr = mos7840_port->shadowMCR; 1726 if (clear & TIOCM_RTS) 1727 mcr &= ~MCR_RTS; 1728 if (clear & TIOCM_DTR) 1729 mcr &= ~MCR_DTR; 1730 if (clear & TIOCM_LOOP) 1731 mcr &= ~MCR_LOOPBACK; 1732 1733 if (set & TIOCM_RTS) 1734 mcr |= MCR_RTS; 1735 if (set & TIOCM_DTR) 1736 mcr |= MCR_DTR; 1737 if (set & TIOCM_LOOP) 1738 mcr |= MCR_LOOPBACK; 1739 1740 mos7840_port->shadowMCR = mcr; 1741 1742 status = 0; 1743 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1744 if (status < 0) { 1745 dbg("setting MODEM_CONTROL_REGISTER Failed\n"); 1746 return -1; 1747 } 1748 1749 return 0; 1750 } 1751 1752 /***************************************************************************** 1753 * mos7840_calc_baud_rate_divisor 1754 * this function calculates the proper baud rate divisor for the specified 1755 * baud rate. 1756 *****************************************************************************/ 1757 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1758 __u16 * clk_sel_val) 1759 { 1760 1761 dbg("%s - %d", __FUNCTION__, baudRate); 1762 1763 if (baudRate <= 115200) { 1764 *divisor = 115200 / baudRate; 1765 *clk_sel_val = 0x0; 1766 } 1767 if ((baudRate > 115200) && (baudRate <= 230400)) { 1768 *divisor = 230400 / baudRate; 1769 *clk_sel_val = 0x10; 1770 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1771 *divisor = 403200 / baudRate; 1772 *clk_sel_val = 0x20; 1773 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1774 *divisor = 460800 / baudRate; 1775 *clk_sel_val = 0x30; 1776 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1777 *divisor = 806400 / baudRate; 1778 *clk_sel_val = 0x40; 1779 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1780 *divisor = 921600 / baudRate; 1781 *clk_sel_val = 0x50; 1782 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1783 *divisor = 1572864 / baudRate; 1784 *clk_sel_val = 0x60; 1785 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1786 *divisor = 3145728 / baudRate; 1787 *clk_sel_val = 0x70; 1788 } 1789 return 0; 1790 1791 #ifdef NOTMCS7840 1792 1793 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1794 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1795 *divisor = mos7840_divisor_table[i].Divisor; 1796 return 0; 1797 } 1798 } 1799 1800 /* After trying for all the standard baud rates * 1801 * Try calculating the divisor for this baud rate */ 1802 1803 if (baudrate > 75 && baudrate < 230400) { 1804 /* get the divisor */ 1805 custom = (__u16) (230400L / baudrate); 1806 1807 /* Check for round off */ 1808 round1 = (__u16) (2304000L / baudrate); 1809 round = (__u16) (round1 - (custom * 10)); 1810 if (round > 4) { 1811 custom++; 1812 } 1813 *divisor = custom; 1814 1815 dbg(" Baud %d = %d\n", baudrate, custom); 1816 return 0; 1817 } 1818 1819 dbg("%s\n", " Baud calculation Failed..."); 1820 return -1; 1821 #endif 1822 } 1823 1824 /***************************************************************************** 1825 * mos7840_send_cmd_write_baud_rate 1826 * this function sends the proper command to change the baud rate of the 1827 * specified port. 1828 *****************************************************************************/ 1829 1830 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1831 int baudRate) 1832 { 1833 int divisor = 0; 1834 int status; 1835 __u16 Data; 1836 unsigned char number; 1837 __u16 clk_sel_val; 1838 struct usb_serial_port *port; 1839 1840 if (mos7840_port == NULL) 1841 return -1; 1842 1843 port = (struct usb_serial_port *)mos7840_port->port; 1844 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 1845 dbg("%s", "Invalid port \n"); 1846 return -1; 1847 } 1848 1849 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) { 1850 dbg("%s", "Invalid Serial \n"); 1851 return -1; 1852 } 1853 1854 dbg("%s", "Entering .......... \n"); 1855 1856 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1857 1858 dbg("%s - port = %d, baud = %d", __FUNCTION__, 1859 mos7840_port->port->number, baudRate); 1860 //reset clk_uart_sel in spregOffset 1861 if (baudRate > 115200) { 1862 #ifdef HW_flow_control 1863 //NOTE: need to see the pther register to modify 1864 //setting h/w flow control bit to 1; 1865 status = 0; 1866 Data = 0x2b; 1867 mos7840_port->shadowMCR = Data; 1868 status = 1869 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1870 if (status < 0) { 1871 dbg("Writing spreg failed in set_serial_baud\n"); 1872 return -1; 1873 } 1874 #endif 1875 1876 } else { 1877 #ifdef HW_flow_control 1878 //setting h/w flow control bit to 0; 1879 status = 0; 1880 Data = 0xb; 1881 mos7840_port->shadowMCR = Data; 1882 status = 1883 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1884 if (status < 0) { 1885 dbg("Writing spreg failed in set_serial_baud\n"); 1886 return -1; 1887 } 1888 #endif 1889 1890 } 1891 1892 if (1) //baudRate <= 115200) 1893 { 1894 clk_sel_val = 0x0; 1895 Data = 0x0; 1896 status = 0; 1897 status = 1898 mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1899 &clk_sel_val); 1900 status = 1901 mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1902 &Data); 1903 if (status < 0) { 1904 dbg("reading spreg failed in set_serial_baud\n"); 1905 return -1; 1906 } 1907 Data = (Data & 0x8f) | clk_sel_val; 1908 status = 0; 1909 status = 1910 mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1911 if (status < 0) { 1912 dbg("Writing spreg failed in set_serial_baud\n"); 1913 return -1; 1914 } 1915 /* Calculate the Divisor */ 1916 1917 if (status) { 1918 err("%s - bad baud rate", __FUNCTION__); 1919 dbg("%s\n", "bad baud rate"); 1920 return status; 1921 } 1922 /* Enable access to divisor latch */ 1923 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1924 mos7840_port->shadowLCR = Data; 1925 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1926 1927 /* Write the divisor */ 1928 Data = (unsigned char)(divisor & 0xff); 1929 dbg("set_serial_baud Value to write DLL is %x\n", Data); 1930 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1931 1932 Data = (unsigned char)((divisor & 0xff00) >> 8); 1933 dbg("set_serial_baud Value to write DLM is %x\n", Data); 1934 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1935 1936 /* Disable access to divisor latch */ 1937 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1938 mos7840_port->shadowLCR = Data; 1939 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1940 1941 } 1942 1943 return status; 1944 } 1945 1946 /***************************************************************************** 1947 * mos7840_change_port_settings 1948 * This routine is called to set the UART on the device to match 1949 * the specified new settings. 1950 *****************************************************************************/ 1951 1952 static void mos7840_change_port_settings(struct moschip_port *mos7840_port, 1953 struct ktermios *old_termios) 1954 { 1955 struct tty_struct *tty; 1956 int baud; 1957 unsigned cflag; 1958 unsigned iflag; 1959 __u8 lData; 1960 __u8 lParity; 1961 __u8 lStop; 1962 int status; 1963 __u16 Data; 1964 struct usb_serial_port *port; 1965 struct usb_serial *serial; 1966 1967 if (mos7840_port == NULL) 1968 return; 1969 1970 port = (struct usb_serial_port *)mos7840_port->port; 1971 1972 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 1973 dbg("%s", "Invalid port \n"); 1974 return; 1975 } 1976 1977 if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) { 1978 dbg("%s", "Invalid Serial \n"); 1979 return; 1980 } 1981 1982 serial = port->serial; 1983 1984 dbg("%s - port %d", __FUNCTION__, mos7840_port->port->number); 1985 1986 if (!mos7840_port->open) { 1987 dbg("%s - port not opened", __FUNCTION__); 1988 return; 1989 } 1990 1991 tty = mos7840_port->port->tty; 1992 1993 dbg("%s", "Entering .......... \n"); 1994 1995 lData = LCR_BITS_8; 1996 lStop = LCR_STOP_1; 1997 lParity = LCR_PAR_NONE; 1998 1999 cflag = tty->termios->c_cflag; 2000 iflag = tty->termios->c_iflag; 2001 2002 /* Change the number of bits */ 2003 if (cflag & CSIZE) { 2004 switch (cflag & CSIZE) { 2005 case CS5: 2006 lData = LCR_BITS_5; 2007 break; 2008 2009 case CS6: 2010 lData = LCR_BITS_6; 2011 break; 2012 2013 case CS7: 2014 lData = LCR_BITS_7; 2015 break; 2016 default: 2017 case CS8: 2018 lData = LCR_BITS_8; 2019 break; 2020 } 2021 } 2022 /* Change the Parity bit */ 2023 if (cflag & PARENB) { 2024 if (cflag & PARODD) { 2025 lParity = LCR_PAR_ODD; 2026 dbg("%s - parity = odd", __FUNCTION__); 2027 } else { 2028 lParity = LCR_PAR_EVEN; 2029 dbg("%s - parity = even", __FUNCTION__); 2030 } 2031 2032 } else { 2033 dbg("%s - parity = none", __FUNCTION__); 2034 } 2035 2036 if (cflag & CMSPAR) { 2037 lParity = lParity | 0x20; 2038 } 2039 2040 /* Change the Stop bit */ 2041 if (cflag & CSTOPB) { 2042 lStop = LCR_STOP_2; 2043 dbg("%s - stop bits = 2", __FUNCTION__); 2044 } else { 2045 lStop = LCR_STOP_1; 2046 dbg("%s - stop bits = 1", __FUNCTION__); 2047 } 2048 2049 /* Update the LCR with the correct value */ 2050 mos7840_port->shadowLCR &= 2051 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2052 mos7840_port->shadowLCR |= (lData | lParity | lStop); 2053 2054 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n", 2055 mos7840_port->shadowLCR); 2056 /* Disable Interrupts */ 2057 Data = 0x00; 2058 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2059 2060 Data = 0x00; 2061 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2062 2063 Data = 0xcf; 2064 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2065 2066 /* Send the updated LCR value to the mos7840 */ 2067 Data = mos7840_port->shadowLCR; 2068 2069 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 2070 2071 Data = 0x00b; 2072 mos7840_port->shadowMCR = Data; 2073 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2074 Data = 0x00b; 2075 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2076 2077 /* set up the MCR register and send it to the mos7840 */ 2078 2079 mos7840_port->shadowMCR = MCR_MASTER_IE; 2080 if (cflag & CBAUD) { 2081 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2082 } 2083 2084 if (cflag & CRTSCTS) { 2085 mos7840_port->shadowMCR |= (MCR_XON_ANY); 2086 2087 } else { 2088 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2089 } 2090 2091 Data = mos7840_port->shadowMCR; 2092 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2093 2094 /* Determine divisor based on baud rate */ 2095 baud = tty_get_baud_rate(tty); 2096 2097 if (!baud) { 2098 /* pick a default, any default... */ 2099 dbg("%s\n", "Picked default baud..."); 2100 baud = 9600; 2101 } 2102 2103 dbg("%s - baud rate = %d", __FUNCTION__, baud); 2104 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2105 2106 /* Enable Interrupts */ 2107 Data = 0x0c; 2108 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2109 2110 if (mos7840_port->read_urb->status != -EINPROGRESS) { 2111 mos7840_port->read_urb->dev = serial->dev; 2112 2113 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2114 2115 if (status) { 2116 dbg(" usb_submit_urb(read bulk) failed, status = %d", 2117 status); 2118 } 2119 } 2120 wake_up(&mos7840_port->delta_msr_wait); 2121 mos7840_port->delta_msr_cond = 1; 2122 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n", 2123 mos7840_port->shadowLCR); 2124 2125 return; 2126 } 2127 2128 /***************************************************************************** 2129 * mos7840_set_termios 2130 * this function is called by the tty driver when it wants to change 2131 * the termios structure 2132 *****************************************************************************/ 2133 2134 static void mos7840_set_termios(struct usb_serial_port *port, 2135 struct ktermios *old_termios) 2136 { 2137 int status; 2138 unsigned int cflag; 2139 struct usb_serial *serial; 2140 struct moschip_port *mos7840_port; 2141 struct tty_struct *tty; 2142 dbg("mos7840_set_termios: START\n"); 2143 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 2144 dbg("%s", "Invalid port \n"); 2145 return; 2146 } 2147 2148 serial = port->serial; 2149 2150 if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) { 2151 dbg("%s", "Invalid Serial \n"); 2152 return; 2153 } 2154 2155 mos7840_port = mos7840_get_port_private(port); 2156 2157 if (mos7840_port == NULL) 2158 return; 2159 2160 tty = port->tty; 2161 2162 if (!mos7840_port->open) { 2163 dbg("%s - port not opened", __FUNCTION__); 2164 return; 2165 } 2166 2167 dbg("%s\n", "setting termios - "); 2168 2169 cflag = tty->termios->c_cflag; 2170 2171 dbg("%s - clfag %08x iflag %08x", __FUNCTION__, 2172 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2173 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, 2174 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2175 dbg("%s - port %d", __FUNCTION__, port->number); 2176 2177 /* change the port settings to the new ones specified */ 2178 2179 mos7840_change_port_settings(mos7840_port, old_termios); 2180 2181 if (!mos7840_port->read_urb) { 2182 dbg("%s", "URB KILLED !!!!!\n"); 2183 return; 2184 } 2185 2186 if (mos7840_port->read_urb->status != -EINPROGRESS) { 2187 mos7840_port->read_urb->dev = serial->dev; 2188 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2189 if (status) { 2190 dbg(" usb_submit_urb(read bulk) failed, status = %d", 2191 status); 2192 } 2193 } 2194 return; 2195 } 2196 2197 /***************************************************************************** 2198 * mos7840_get_lsr_info - get line status register info 2199 * 2200 * Purpose: Let user call ioctl() to get info when the UART physically 2201 * is emptied. On bus types like RS485, the transmitter must 2202 * release the bus after transmitting. This must be done when 2203 * the transmit shift register is empty, not be done when the 2204 * transmit holding register is empty. This functionality 2205 * allows an RS485 driver to be written in user space. 2206 *****************************************************************************/ 2207 2208 static int mos7840_get_lsr_info(struct moschip_port *mos7840_port, 2209 unsigned int __user *value) 2210 { 2211 int count; 2212 unsigned int result = 0; 2213 2214 count = mos7840_chars_in_buffer(mos7840_port->port); 2215 if (count == 0) { 2216 dbg("%s -- Empty", __FUNCTION__); 2217 result = TIOCSER_TEMT; 2218 } 2219 2220 if (copy_to_user(value, &result, sizeof(int))) 2221 return -EFAULT; 2222 return 0; 2223 } 2224 2225 /***************************************************************************** 2226 * mos7840_set_modem_info 2227 * function to set modem info 2228 *****************************************************************************/ 2229 2230 static int mos7840_set_modem_info(struct moschip_port *mos7840_port, 2231 unsigned int cmd, unsigned int __user *value) 2232 { 2233 unsigned int mcr; 2234 unsigned int arg; 2235 __u16 Data; 2236 int status; 2237 struct usb_serial_port *port; 2238 2239 if (mos7840_port == NULL) 2240 return -1; 2241 2242 port = (struct usb_serial_port *)mos7840_port->port; 2243 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 2244 dbg("%s", "Invalid port \n"); 2245 return -1; 2246 } 2247 2248 mcr = mos7840_port->shadowMCR; 2249 2250 if (copy_from_user(&arg, value, sizeof(int))) 2251 return -EFAULT; 2252 2253 switch (cmd) { 2254 case TIOCMBIS: 2255 if (arg & TIOCM_RTS) 2256 mcr |= MCR_RTS; 2257 if (arg & TIOCM_DTR) 2258 mcr |= MCR_RTS; 2259 if (arg & TIOCM_LOOP) 2260 mcr |= MCR_LOOPBACK; 2261 break; 2262 2263 case TIOCMBIC: 2264 if (arg & TIOCM_RTS) 2265 mcr &= ~MCR_RTS; 2266 if (arg & TIOCM_DTR) 2267 mcr &= ~MCR_RTS; 2268 if (arg & TIOCM_LOOP) 2269 mcr &= ~MCR_LOOPBACK; 2270 break; 2271 2272 case TIOCMSET: 2273 /* turn off the RTS and DTR and LOOPBACK 2274 * and then only turn on what was asked to */ 2275 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); 2276 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); 2277 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); 2278 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); 2279 break; 2280 } 2281 2282 mos7840_port->shadowMCR = mcr; 2283 2284 Data = mos7840_port->shadowMCR; 2285 status = 0; 2286 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2287 if (status < 0) { 2288 dbg("setting MODEM_CONTROL_REGISTER Failed\n"); 2289 return -1; 2290 } 2291 2292 return 0; 2293 } 2294 2295 /***************************************************************************** 2296 * mos7840_get_modem_info 2297 * function to get modem info 2298 *****************************************************************************/ 2299 2300 static int mos7840_get_modem_info(struct moschip_port *mos7840_port, 2301 unsigned int __user *value) 2302 { 2303 unsigned int result = 0; 2304 __u16 msr; 2305 unsigned int mcr = mos7840_port->shadowMCR; 2306 int status = 0; 2307 status = 2308 mos7840_get_uart_reg(mos7840_port->port, MODEM_STATUS_REGISTER, 2309 &msr); 2310 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ 2311 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ 2312 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ 2313 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ 2314 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ 2315 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ 2316 2317 dbg("%s -- %x", __FUNCTION__, result); 2318 2319 if (copy_to_user(value, &result, sizeof(int))) 2320 return -EFAULT; 2321 return 0; 2322 } 2323 2324 /***************************************************************************** 2325 * mos7840_get_serial_info 2326 * function to get information about serial port 2327 *****************************************************************************/ 2328 2329 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2330 struct serial_struct __user *retinfo) 2331 { 2332 struct serial_struct tmp; 2333 2334 if (mos7840_port == NULL) 2335 return -1; 2336 2337 if (!retinfo) 2338 return -EFAULT; 2339 2340 memset(&tmp, 0, sizeof(tmp)); 2341 2342 tmp.type = PORT_16550A; 2343 tmp.line = mos7840_port->port->serial->minor; 2344 tmp.port = mos7840_port->port->number; 2345 tmp.irq = 0; 2346 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2347 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2348 tmp.baud_base = 9600; 2349 tmp.close_delay = 5 * HZ; 2350 tmp.closing_wait = 30 * HZ; 2351 2352 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2353 return -EFAULT; 2354 return 0; 2355 } 2356 2357 /***************************************************************************** 2358 * SerialIoctl 2359 * this function handles any ioctl calls to the driver 2360 *****************************************************************************/ 2361 2362 static int mos7840_ioctl(struct usb_serial_port *port, struct file *file, 2363 unsigned int cmd, unsigned long arg) 2364 { 2365 void __user *argp = (void __user *)arg; 2366 struct moschip_port *mos7840_port; 2367 struct tty_struct *tty; 2368 2369 struct async_icount cnow; 2370 struct async_icount cprev; 2371 struct serial_icounter_struct icount; 2372 int mosret = 0; 2373 2374 if (mos7840_port_paranoia_check(port, __FUNCTION__)) { 2375 dbg("%s", "Invalid port \n"); 2376 return -1; 2377 } 2378 2379 mos7840_port = mos7840_get_port_private(port); 2380 2381 if (mos7840_port == NULL) 2382 return -1; 2383 2384 tty = mos7840_port->port->tty; 2385 2386 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); 2387 2388 switch (cmd) { 2389 /* return number of bytes available */ 2390 2391 case TIOCSERGETLSR: 2392 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); 2393 return mos7840_get_lsr_info(mos7840_port, argp); 2394 return 0; 2395 2396 case TIOCMBIS: 2397 case TIOCMBIC: 2398 case TIOCMSET: 2399 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__, 2400 port->number); 2401 mosret = 2402 mos7840_set_modem_info(mos7840_port, cmd, argp); 2403 return mosret; 2404 2405 case TIOCMGET: 2406 dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number); 2407 return mos7840_get_modem_info(mos7840_port, argp); 2408 2409 case TIOCGSERIAL: 2410 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); 2411 return mos7840_get_serial_info(mos7840_port, argp); 2412 2413 case TIOCSSERIAL: 2414 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); 2415 break; 2416 2417 case TIOCMIWAIT: 2418 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); 2419 cprev = mos7840_port->icount; 2420 while (1) { 2421 //interruptible_sleep_on(&mos7840_port->delta_msr_wait); 2422 mos7840_port->delta_msr_cond = 0; 2423 wait_event_interruptible(mos7840_port->delta_msr_wait, 2424 (mos7840_port-> 2425 delta_msr_cond == 1)); 2426 2427 /* see if a signal did it */ 2428 if (signal_pending(current)) 2429 return -ERESTARTSYS; 2430 cnow = mos7840_port->icount; 2431 smp_rmb(); 2432 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2433 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2434 return -EIO; /* no change => error */ 2435 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2436 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2437 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2438 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2439 return 0; 2440 } 2441 cprev = cnow; 2442 } 2443 /* NOTREACHED */ 2444 break; 2445 2446 case TIOCGICOUNT: 2447 cnow = mos7840_port->icount; 2448 smp_rmb(); 2449 icount.cts = cnow.cts; 2450 icount.dsr = cnow.dsr; 2451 icount.rng = cnow.rng; 2452 icount.dcd = cnow.dcd; 2453 icount.rx = cnow.rx; 2454 icount.tx = cnow.tx; 2455 icount.frame = cnow.frame; 2456 icount.overrun = cnow.overrun; 2457 icount.parity = cnow.parity; 2458 icount.brk = cnow.brk; 2459 icount.buf_overrun = cnow.buf_overrun; 2460 2461 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, 2462 port->number, icount.rx, icount.tx); 2463 if (copy_to_user(argp, &icount, sizeof(icount))) 2464 return -EFAULT; 2465 return 0; 2466 2467 case TIOCEXBAUD: 2468 return 0; 2469 default: 2470 break; 2471 } 2472 2473 return -ENOIOCTLCMD; 2474 } 2475 2476 static int mos7840_calc_num_ports(struct usb_serial *serial) 2477 { 2478 int mos7840_num_ports = 0; 2479 2480 dbg("numberofendpoints: %d \n", 2481 (int)serial->interface->cur_altsetting->desc.bNumEndpoints); 2482 dbg("numberofendpoints: %d \n", 2483 (int)serial->interface->altsetting->desc.bNumEndpoints); 2484 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2485 mos7840_num_ports = serial->num_ports = 2; 2486 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2487 serial->num_bulk_in = 4; 2488 serial->num_bulk_out = 4; 2489 mos7840_num_ports = serial->num_ports = 4; 2490 } 2491 2492 return mos7840_num_ports; 2493 } 2494 2495 /**************************************************************************** 2496 * mos7840_startup 2497 ****************************************************************************/ 2498 2499 static int mos7840_startup(struct usb_serial *serial) 2500 { 2501 struct moschip_port *mos7840_port; 2502 struct usb_device *dev; 2503 int i, status; 2504 2505 __u16 Data; 2506 dbg("%s \n", " mos7840_startup :entering.........."); 2507 2508 if (!serial) { 2509 dbg("%s\n", "Invalid Handler"); 2510 return -1; 2511 } 2512 2513 dev = serial->dev; 2514 2515 dbg("%s\n", "Entering..."); 2516 2517 /* we set up the pointers to the endpoints in the mos7840_open * 2518 * function, as the structures aren't created yet. */ 2519 2520 /* set up port private structures */ 2521 for (i = 0; i < serial->num_ports; ++i) { 2522 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2523 if (mos7840_port == NULL) { 2524 err("%s - Out of memory", __FUNCTION__); 2525 status = -ENOMEM; 2526 i--; /* don't follow NULL pointer cleaning up */ 2527 goto error; 2528 } 2529 2530 /* Initialize all port interrupt end point to port 0 int endpoint * 2531 * Our device has only one interrupt end point comman to all port */ 2532 2533 mos7840_port->port = serial->port[i]; 2534 mos7840_set_port_private(serial->port[i], mos7840_port); 2535 spin_lock_init(&mos7840_port->pool_lock); 2536 2537 mos7840_port->port_num = ((serial->port[i]->number - 2538 (serial->port[i]->serial->minor)) + 2539 1); 2540 2541 if (mos7840_port->port_num == 1) { 2542 mos7840_port->SpRegOffset = 0x0; 2543 mos7840_port->ControlRegOffset = 0x1; 2544 mos7840_port->DcrRegOffset = 0x4; 2545 } else if ((mos7840_port->port_num == 2) 2546 && (serial->num_ports == 4)) { 2547 mos7840_port->SpRegOffset = 0x8; 2548 mos7840_port->ControlRegOffset = 0x9; 2549 mos7840_port->DcrRegOffset = 0x16; 2550 } else if ((mos7840_port->port_num == 2) 2551 && (serial->num_ports == 2)) { 2552 mos7840_port->SpRegOffset = 0xa; 2553 mos7840_port->ControlRegOffset = 0xb; 2554 mos7840_port->DcrRegOffset = 0x19; 2555 } else if ((mos7840_port->port_num == 3) 2556 && (serial->num_ports == 4)) { 2557 mos7840_port->SpRegOffset = 0xa; 2558 mos7840_port->ControlRegOffset = 0xb; 2559 mos7840_port->DcrRegOffset = 0x19; 2560 } else if ((mos7840_port->port_num == 4) 2561 && (serial->num_ports == 4)) { 2562 mos7840_port->SpRegOffset = 0xc; 2563 mos7840_port->ControlRegOffset = 0xd; 2564 mos7840_port->DcrRegOffset = 0x1c; 2565 } 2566 mos7840_dump_serial_port(mos7840_port); 2567 2568 mos7840_set_port_private(serial->port[i], mos7840_port); 2569 2570 //enable rx_disable bit in control register 2571 2572 status = 2573 mos7840_get_reg_sync(serial->port[i], 2574 mos7840_port->ControlRegOffset, &Data); 2575 if (status < 0) { 2576 dbg("Reading ControlReg failed status-0x%x\n", status); 2577 break; 2578 } else 2579 dbg("ControlReg Reading success val is %x, status%d\n", 2580 Data, status); 2581 Data |= 0x08; //setting driver done bit 2582 Data |= 0x04; //sp1_bit to have cts change reflect in modem status reg 2583 2584 //Data |= 0x20; //rx_disable bit 2585 status = 0; 2586 status = 2587 mos7840_set_reg_sync(serial->port[i], 2588 mos7840_port->ControlRegOffset, Data); 2589 if (status < 0) { 2590 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2591 break; 2592 } else 2593 dbg("ControlReg Writing success(rx_disable) status%d\n", 2594 status); 2595 2596 //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3 2597 Data = 0x01; 2598 status = 0; 2599 status = 2600 mos7840_set_reg_sync(serial->port[i], 2601 (__u16) (mos7840_port->DcrRegOffset + 2602 0), Data); 2603 if (status < 0) { 2604 dbg("Writing DCR0 failed status-0x%x\n", status); 2605 break; 2606 } else 2607 dbg("DCR0 Writing success status%d\n", status); 2608 2609 Data = 0x05; 2610 status = 0; 2611 status = 2612 mos7840_set_reg_sync(serial->port[i], 2613 (__u16) (mos7840_port->DcrRegOffset + 2614 1), Data); 2615 if (status < 0) { 2616 dbg("Writing DCR1 failed status-0x%x\n", status); 2617 break; 2618 } else 2619 dbg("DCR1 Writing success status%d\n", status); 2620 2621 Data = 0x24; 2622 status = 0; 2623 status = 2624 mos7840_set_reg_sync(serial->port[i], 2625 (__u16) (mos7840_port->DcrRegOffset + 2626 2), Data); 2627 if (status < 0) { 2628 dbg("Writing DCR2 failed status-0x%x\n", status); 2629 break; 2630 } else 2631 dbg("DCR2 Writing success status%d\n", status); 2632 2633 // write values in clkstart0x0 and clkmulti 0x20 2634 Data = 0x0; 2635 status = 0; 2636 status = 2637 mos7840_set_reg_sync(serial->port[i], 2638 CLK_START_VALUE_REGISTER, Data); 2639 if (status < 0) { 2640 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2641 break; 2642 } else 2643 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2644 2645 Data = 0x20; 2646 status = 2647 mos7840_set_reg_sync(serial->port[i], CLK_MULTI_REGISTER, 2648 Data); 2649 if (status < 0) { 2650 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n", 2651 status); 2652 goto error; 2653 } else 2654 dbg("CLK_MULTI_REGISTER Writing success status%d\n", 2655 status); 2656 2657 //write value 0x0 to scratchpad register 2658 Data = 0x00; 2659 status = 2660 mos7840_set_uart_reg(serial->port[i], SCRATCH_PAD_REGISTER, 2661 Data); 2662 if (status < 0) { 2663 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", 2664 status); 2665 break; 2666 } else 2667 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n", 2668 status); 2669 2670 //Zero Length flag register 2671 if ((mos7840_port->port_num != 1) 2672 && (serial->num_ports == 2)) { 2673 2674 Data = 0xff; 2675 status = 0; 2676 status = mos7840_set_reg_sync(serial->port[i], 2677 (__u16) (ZLP_REG1 + 2678 ((__u16) 2679 mos7840_port-> 2680 port_num)), 2681 Data); 2682 dbg("ZLIP offset%x\n", 2683 (__u16) (ZLP_REG1 + 2684 ((__u16) mos7840_port->port_num))); 2685 if (status < 0) { 2686 dbg("Writing ZLP_REG%d failed status-0x%x\n", 2687 i + 2, status); 2688 break; 2689 } else 2690 dbg("ZLP_REG%d Writing success status%d\n", 2691 i + 2, status); 2692 } else { 2693 Data = 0xff; 2694 status = 0; 2695 status = mos7840_set_reg_sync(serial->port[i], 2696 (__u16) (ZLP_REG1 + 2697 ((__u16) 2698 mos7840_port-> 2699 port_num) - 2700 0x1), Data); 2701 dbg("ZLIP offset%x\n", 2702 (__u16) (ZLP_REG1 + 2703 ((__u16) mos7840_port->port_num) - 0x1)); 2704 if (status < 0) { 2705 dbg("Writing ZLP_REG%d failed status-0x%x\n", 2706 i + 1, status); 2707 break; 2708 } else 2709 dbg("ZLP_REG%d Writing success status%d\n", 2710 i + 1, status); 2711 2712 } 2713 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2714 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2715 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); 2716 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || !mos7840_port->dr) { 2717 status = -ENOMEM; 2718 goto error; 2719 } 2720 } 2721 2722 //Zero Length flag enable 2723 Data = 0x0f; 2724 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2725 if (status < 0) { 2726 dbg("Writing ZLP_REG5 failed status-0x%x\n", status); 2727 goto error; 2728 } else 2729 dbg("ZLP_REG5 Writing success status%d\n", status); 2730 2731 /* setting configuration feature to one */ 2732 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2733 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2734 return 0; 2735 error: 2736 for (/* nothing */; i >= 0; i--) { 2737 mos7840_port = mos7840_get_port_private(serial->port[i]); 2738 2739 kfree(mos7840_port->dr); 2740 kfree(mos7840_port->ctrl_buf); 2741 usb_free_urb(mos7840_port->control_urb); 2742 kfree(mos7840_port); 2743 serial->port[i] = NULL; 2744 } 2745 return status; 2746 } 2747 2748 /**************************************************************************** 2749 * mos7840_shutdown 2750 * This function is called whenever the device is removed from the usb bus. 2751 ****************************************************************************/ 2752 2753 static void mos7840_shutdown(struct usb_serial *serial) 2754 { 2755 int i; 2756 unsigned long flags; 2757 struct moschip_port *mos7840_port; 2758 dbg("%s \n", " shutdown :entering.........."); 2759 2760 if (!serial) { 2761 dbg("%s", "Invalid Handler \n"); 2762 return; 2763 } 2764 2765 /* check for the ports to be closed,close the ports and disconnect */ 2766 2767 /* free private structure allocated for serial port * 2768 * stop reads and writes on all ports */ 2769 2770 for (i = 0; i < serial->num_ports; ++i) { 2771 mos7840_port = mos7840_get_port_private(serial->port[i]); 2772 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2773 mos7840_port->zombie = 1; 2774 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2775 usb_kill_urb(mos7840_port->control_urb); 2776 kfree(mos7840_port->ctrl_buf); 2777 kfree(mos7840_port->dr); 2778 kfree(mos7840_port); 2779 mos7840_set_port_private(serial->port[i], NULL); 2780 } 2781 2782 dbg("%s\n", "Thank u :: "); 2783 2784 } 2785 2786 static struct usb_driver io_driver = { 2787 .name = "mos7840", 2788 .probe = usb_serial_probe, 2789 .disconnect = usb_serial_disconnect, 2790 .id_table = moschip_id_table_combined, 2791 .no_dynamic_id = 1, 2792 }; 2793 2794 static struct usb_serial_driver moschip7840_4port_device = { 2795 .driver = { 2796 .owner = THIS_MODULE, 2797 .name = "mos7840", 2798 }, 2799 .description = DRIVER_DESC, 2800 .usb_driver = &io_driver, 2801 .id_table = moschip_port_id_table, 2802 .num_interrupt_in = 1, //NUM_DONT_CARE,//1, 2803 #ifdef check 2804 .num_bulk_in = 4, 2805 .num_bulk_out = 4, 2806 .num_ports = 4, 2807 #endif 2808 .open = mos7840_open, 2809 .close = mos7840_close, 2810 .write = mos7840_write, 2811 .write_room = mos7840_write_room, 2812 .chars_in_buffer = mos7840_chars_in_buffer, 2813 .throttle = mos7840_throttle, 2814 .unthrottle = mos7840_unthrottle, 2815 .calc_num_ports = mos7840_calc_num_ports, 2816 #ifdef MCSSerialProbe 2817 .probe = mos7840_serial_probe, 2818 #endif 2819 .ioctl = mos7840_ioctl, 2820 .set_termios = mos7840_set_termios, 2821 .break_ctl = mos7840_break, 2822 .tiocmget = mos7840_tiocmget, 2823 .tiocmset = mos7840_tiocmset, 2824 .attach = mos7840_startup, 2825 .shutdown = mos7840_shutdown, 2826 .read_bulk_callback = mos7840_bulk_in_callback, 2827 .read_int_callback = mos7840_interrupt_callback, 2828 }; 2829 2830 /**************************************************************************** 2831 * moschip7840_init 2832 * This is called by the module subsystem, or on startup to initialize us 2833 ****************************************************************************/ 2834 static int __init moschip7840_init(void) 2835 { 2836 int retval; 2837 2838 dbg("%s \n", " mos7840_init :entering.........."); 2839 2840 /* Register with the usb serial */ 2841 retval = usb_serial_register(&moschip7840_4port_device); 2842 2843 if (retval) 2844 goto failed_port_device_register; 2845 2846 dbg("%s\n", "Entring..."); 2847 info(DRIVER_DESC " " DRIVER_VERSION); 2848 2849 /* Register with the usb */ 2850 retval = usb_register(&io_driver); 2851 2852 if (retval) 2853 goto failed_usb_register; 2854 2855 if (retval == 0) { 2856 dbg("%s\n", "Leaving..."); 2857 return 0; 2858 } 2859 2860 failed_usb_register: 2861 usb_serial_deregister(&moschip7840_4port_device); 2862 2863 failed_port_device_register: 2864 2865 return retval; 2866 } 2867 2868 /**************************************************************************** 2869 * moschip7840_exit 2870 * Called when the driver is about to be unloaded. 2871 ****************************************************************************/ 2872 static void __exit moschip7840_exit(void) 2873 { 2874 2875 dbg("%s \n", " mos7840_exit :entering.........."); 2876 2877 usb_deregister(&io_driver); 2878 2879 usb_serial_deregister(&moschip7840_4port_device); 2880 2881 dbg("%s\n", "Entring..."); 2882 } 2883 2884 module_init(moschip7840_init); 2885 module_exit(moschip7840_exit); 2886 2887 /* Module information */ 2888 MODULE_DESCRIPTION(DRIVER_DESC); 2889 MODULE_LICENSE("GPL"); 2890 2891 module_param(debug, bool, S_IRUGO | S_IWUSR); 2892 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2893