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 <linux/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 273 to be Or'ed */ 274 if (port->serial->num_ports == 4) { 275 val |= (((__u16) port->number - 276 (__u16) (port->serial->minor)) + 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 |= (((__u16) port->number - 281 (__u16) (port->serial->minor)) + 1) << 8; 282 dbg("mos7840_set_uart_reg application number is %x\n", 283 val); 284 } else { 285 val |= 286 (((__u16) port->number - 287 (__u16) (port->serial->minor)) + 2) << 8; 288 dbg("mos7840_set_uart_reg application number is %x\n", 289 val); 290 } 291 } 292 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 293 MCS_WR_RTYPE, val, reg, NULL, 0, 294 MOS_WDR_TIMEOUT); 295 296 } 297 298 /* 299 * mos7840_get_uart_reg 300 * To set the Control register by calling usb_fill_control_urb function 301 * by passing usb_rcvctrlpipe function as parameter. 302 */ 303 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 304 __u16 *val) 305 { 306 struct usb_device *dev = port->serial->dev; 307 int ret = 0; 308 __u16 Wval; 309 310 /* dbg("application number is %4x \n", 311 (((__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 = (((__u16) port->number - 321 (__u16) (port->serial->minor)) + 1) << 8; 322 dbg("mos7840_get_uart_reg application number is %x\n", 323 Wval); 324 } else { 325 Wval = (((__u16) port->number - 326 (__u16) (port->serial->minor)) + 2) << 8; 327 dbg("mos7840_get_uart_reg application number is %x\n", 328 Wval); 329 } 330 } 331 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 332 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, 333 MOS_WDR_TIMEOUT); 334 *val = (*val) & 0x00ff; 335 return ret; 336 } 337 338 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 339 { 340 341 dbg("***************************************\n"); 342 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 343 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset); 344 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset); 345 dbg("***************************************\n"); 346 347 } 348 349 /************************************************************************/ 350 /************************************************************************/ 351 /* I N T E R F A C E F U N C T I O N S */ 352 /* I N T E R F A C E F U N C T I O N S */ 353 /************************************************************************/ 354 /************************************************************************/ 355 356 static inline void mos7840_set_port_private(struct usb_serial_port *port, 357 struct moschip_port *data) 358 { 359 usb_set_serial_port_data(port, (void *)data); 360 } 361 362 static inline struct moschip_port *mos7840_get_port_private(struct 363 usb_serial_port 364 *port) 365 { 366 return (struct moschip_port *)usb_get_serial_port_data(port); 367 } 368 369 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 370 { 371 struct moschip_port *mos7840_port; 372 struct async_icount *icount; 373 mos7840_port = port; 374 icount = &mos7840_port->icount; 375 if (new_msr & 376 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 377 MOS_MSR_DELTA_CD)) { 378 icount = &mos7840_port->icount; 379 380 /* update input line counters */ 381 if (new_msr & MOS_MSR_DELTA_CTS) { 382 icount->cts++; 383 smp_wmb(); 384 } 385 if (new_msr & MOS_MSR_DELTA_DSR) { 386 icount->dsr++; 387 smp_wmb(); 388 } 389 if (new_msr & MOS_MSR_DELTA_CD) { 390 icount->dcd++; 391 smp_wmb(); 392 } 393 if (new_msr & MOS_MSR_DELTA_RI) { 394 icount->rng++; 395 smp_wmb(); 396 } 397 } 398 } 399 400 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 401 { 402 struct async_icount *icount; 403 404 dbg("%s - %02x", __func__, new_lsr); 405 406 if (new_lsr & SERIAL_LSR_BI) { 407 /* 408 * Parity and Framing errors only count if they 409 * occur exclusive of a break being 410 * received. 411 */ 412 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 413 } 414 415 /* update input line counters */ 416 icount = &port->icount; 417 if (new_lsr & SERIAL_LSR_BI) { 418 icount->brk++; 419 smp_wmb(); 420 } 421 if (new_lsr & SERIAL_LSR_OE) { 422 icount->overrun++; 423 smp_wmb(); 424 } 425 if (new_lsr & SERIAL_LSR_PE) { 426 icount->parity++; 427 smp_wmb(); 428 } 429 if (new_lsr & SERIAL_LSR_FE) { 430 icount->frame++; 431 smp_wmb(); 432 } 433 } 434 435 /************************************************************************/ 436 /************************************************************************/ 437 /* U S B C A L L B A C K F U N C T I O N S */ 438 /* U S B C A L L B A C K F U N C T I O N S */ 439 /************************************************************************/ 440 /************************************************************************/ 441 442 static void mos7840_control_callback(struct urb *urb) 443 { 444 unsigned char *data; 445 struct moschip_port *mos7840_port; 446 __u8 regval = 0x0; 447 int result = 0; 448 int status = urb->status; 449 450 mos7840_port = urb->context; 451 452 switch (status) { 453 case 0: 454 /* success */ 455 break; 456 case -ECONNRESET: 457 case -ENOENT: 458 case -ESHUTDOWN: 459 /* this urb is terminated, clean up */ 460 dbg("%s - urb shutting down with status: %d", __func__, 461 status); 462 return; 463 default: 464 dbg("%s - nonzero urb status received: %d", __func__, 465 status); 466 goto exit; 467 } 468 469 dbg("%s urb buffer size is %d\n", __func__, urb->actual_length); 470 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__, 471 mos7840_port->MsrLsr, mos7840_port->port_num); 472 data = urb->transfer_buffer; 473 regval = (__u8) data[0]; 474 dbg("%s data is %x\n", __func__, regval); 475 if (mos7840_port->MsrLsr == 0) 476 mos7840_handle_new_msr(mos7840_port, regval); 477 else if (mos7840_port->MsrLsr == 1) 478 mos7840_handle_new_lsr(mos7840_port, regval); 479 480 exit: 481 spin_lock(&mos7840_port->pool_lock); 482 if (!mos7840_port->zombie) 483 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 484 spin_unlock(&mos7840_port->pool_lock); 485 if (result) { 486 dev_err(&urb->dev->dev, 487 "%s - Error %d submitting interrupt urb\n", 488 __func__, result); 489 } 490 } 491 492 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 493 __u16 *val) 494 { 495 struct usb_device *dev = mcs->port->serial->dev; 496 struct usb_ctrlrequest *dr = mcs->dr; 497 unsigned char *buffer = mcs->ctrl_buf; 498 int ret; 499 500 dr->bRequestType = MCS_RD_RTYPE; 501 dr->bRequest = MCS_RDREQ; 502 dr->wValue = cpu_to_le16(Wval); /* 0 */ 503 dr->wIndex = cpu_to_le16(reg); 504 dr->wLength = cpu_to_le16(2); 505 506 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 507 (unsigned char *)dr, buffer, 2, 508 mos7840_control_callback, mcs); 509 mcs->control_urb->transfer_buffer_length = 2; 510 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 511 return ret; 512 } 513 514 /***************************************************************************** 515 * mos7840_interrupt_callback 516 * this is the callback function for when we have received data on the 517 * interrupt endpoint. 518 *****************************************************************************/ 519 520 static void mos7840_interrupt_callback(struct urb *urb) 521 { 522 int result; 523 int length; 524 struct moschip_port *mos7840_port; 525 struct usb_serial *serial; 526 __u16 Data; 527 unsigned char *data; 528 __u8 sp[5], st; 529 int i, rv = 0; 530 __u16 wval, wreg = 0; 531 int status = urb->status; 532 533 dbg("%s", " : Entering\n"); 534 535 switch (status) { 536 case 0: 537 /* success */ 538 break; 539 case -ECONNRESET: 540 case -ENOENT: 541 case -ESHUTDOWN: 542 /* this urb is terminated, clean up */ 543 dbg("%s - urb shutting down with status: %d", __func__, 544 status); 545 return; 546 default: 547 dbg("%s - nonzero urb status received: %d", __func__, 548 status); 549 goto exit; 550 } 551 552 length = urb->actual_length; 553 data = urb->transfer_buffer; 554 555 serial = urb->context; 556 557 /* Moschip get 5 bytes 558 * Byte 1 IIR Port 1 (port.number is 0) 559 * Byte 2 IIR Port 2 (port.number is 1) 560 * Byte 3 IIR Port 3 (port.number is 2) 561 * Byte 4 IIR Port 4 (port.number is 3) 562 * Byte 5 FIFO status for both */ 563 564 if (length && length > 5) { 565 dbg("%s \n", "Wrong data !!!"); 566 return; 567 } 568 569 sp[0] = (__u8) data[0]; 570 sp[1] = (__u8) data[1]; 571 sp[2] = (__u8) data[2]; 572 sp[3] = (__u8) data[3]; 573 st = (__u8) data[4]; 574 575 for (i = 0; i < serial->num_ports; i++) { 576 mos7840_port = mos7840_get_port_private(serial->port[i]); 577 wval = 578 (((__u16) serial->port[i]->number - 579 (__u16) (serial->minor)) + 1) << 8; 580 if (mos7840_port->open) { 581 if (sp[i] & 0x01) { 582 dbg("SP%d No Interrupt !!!\n", i); 583 } else { 584 switch (sp[i] & 0x0f) { 585 case SERIAL_IIR_RLS: 586 dbg("Serial Port %d: Receiver status error or ", i); 587 dbg("address bit detected in 9-bit mode\n"); 588 mos7840_port->MsrLsr = 1; 589 wreg = LINE_STATUS_REGISTER; 590 break; 591 case SERIAL_IIR_MS: 592 dbg("Serial Port %d: Modem status change\n", i); 593 mos7840_port->MsrLsr = 0; 594 wreg = MODEM_STATUS_REGISTER; 595 break; 596 } 597 spin_lock(&mos7840_port->pool_lock); 598 if (!mos7840_port->zombie) { 599 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 600 } else { 601 spin_unlock(&mos7840_port->pool_lock); 602 return; 603 } 604 spin_unlock(&mos7840_port->pool_lock); 605 } 606 } 607 } 608 if (!(rv < 0)) 609 /* the completion handler for the control urb will resubmit */ 610 return; 611 exit: 612 result = usb_submit_urb(urb, GFP_ATOMIC); 613 if (result) { 614 dev_err(&urb->dev->dev, 615 "%s - Error %d submitting interrupt urb\n", 616 __func__, result); 617 } 618 } 619 620 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 621 const char *function) 622 { 623 if (!port) { 624 dbg("%s - port == NULL", function); 625 return -1; 626 } 627 if (!port->serial) { 628 dbg("%s - port->serial == NULL", function); 629 return -1; 630 } 631 632 return 0; 633 } 634 635 /* Inline functions to check the sanity of a pointer that is passed to us */ 636 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 637 const char *function) 638 { 639 if (!serial) { 640 dbg("%s - serial == NULL", function); 641 return -1; 642 } 643 if (!serial->type) { 644 dbg("%s - serial->type == NULL!", function); 645 return -1; 646 } 647 648 return 0; 649 } 650 651 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 652 const char *function) 653 { 654 /* if no port was specified, or it fails a paranoia check */ 655 if (!port || 656 mos7840_port_paranoia_check(port, function) || 657 mos7840_serial_paranoia_check(port->serial, function)) { 658 /* then say that we don't have a valid usb_serial thing, 659 * which will end up genrating -ENODEV return values */ 660 return NULL; 661 } 662 663 return port->serial; 664 } 665 666 /***************************************************************************** 667 * mos7840_bulk_in_callback 668 * this is the callback function for when we have received data on the 669 * bulk in endpoint. 670 *****************************************************************************/ 671 672 static void mos7840_bulk_in_callback(struct urb *urb) 673 { 674 int retval; 675 unsigned char *data; 676 struct usb_serial *serial; 677 struct usb_serial_port *port; 678 struct moschip_port *mos7840_port; 679 struct tty_struct *tty; 680 int status = urb->status; 681 682 if (status) { 683 dbg("nonzero read bulk status received: %d", status); 684 return; 685 } 686 687 mos7840_port = urb->context; 688 if (!mos7840_port) { 689 dbg("%s", "NULL mos7840_port pointer \n"); 690 return; 691 } 692 693 port = (struct usb_serial_port *)mos7840_port->port; 694 if (mos7840_port_paranoia_check(port, __func__)) { 695 dbg("%s", "Port Paranoia failed \n"); 696 return; 697 } 698 699 serial = mos7840_get_usb_serial(port, __func__); 700 if (!serial) { 701 dbg("%s\n", "Bad serial pointer "); 702 return; 703 } 704 705 dbg("%s\n", "Entering... \n"); 706 707 data = urb->transfer_buffer; 708 709 dbg("%s", "Entering ........... \n"); 710 711 if (urb->actual_length) { 712 tty = tty_port_tty_get(&mos7840_port->port->port); 713 if (tty) { 714 tty_buffer_request_room(tty, urb->actual_length); 715 tty_insert_flip_string(tty, data, urb->actual_length); 716 dbg(" %s \n", data); 717 tty_flip_buffer_push(tty); 718 tty_kref_put(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 745 * serial data 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 = 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, __func__)) { 771 dbg("%s", "Port Paranoia failed \n"); 772 return; 773 } 774 775 dbg("%s \n", "Entering ........."); 776 777 tty = tty_port_tty_get(&mos7840_port->port->port); 778 if (tty && mos7840_port->open) 779 tty_wakeup(tty); 780 tty_kref_put(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 tty_struct *tty, 808 struct usb_serial_port *port, struct file *filp) 809 { 810 int response; 811 int j; 812 struct usb_serial *serial; 813 struct urb *urb; 814 __u16 Data; 815 int status; 816 struct moschip_port *mos7840_port; 817 struct moschip_port *port0; 818 819 if (mos7840_port_paranoia_check(port, __func__)) { 820 dbg("%s", "Port Paranoia failed \n"); 821 return -ENODEV; 822 } 823 824 serial = port->serial; 825 826 if (mos7840_serial_paranoia_check(serial, __func__)) { 827 dbg("%s", "Serial Paranoia failed \n"); 828 return -ENODEV; 829 } 830 831 mos7840_port = mos7840_get_port_private(port); 832 port0 = mos7840_get_port_private(serial->port[0]); 833 834 if (mos7840_port == NULL || port0 == NULL) 835 return -ENODEV; 836 837 usb_clear_halt(serial->dev, port->write_urb->pipe); 838 usb_clear_halt(serial->dev, port->read_urb->pipe); 839 port0->open_ports++; 840 841 /* Initialising the write urb pool */ 842 for (j = 0; j < NUM_URBS; ++j) { 843 urb = usb_alloc_urb(0, GFP_KERNEL); 844 mos7840_port->write_urb_pool[j] = urb; 845 846 if (urb == NULL) { 847 dev_err(&port->dev, "No more urbs???\n"); 848 continue; 849 } 850 851 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 852 GFP_KERNEL); 853 if (!urb->transfer_buffer) { 854 usb_free_urb(urb); 855 mos7840_port->write_urb_pool[j] = NULL; 856 dev_err(&port->dev, 857 "%s-out of memory for urb buffers.\n", 858 __func__); 859 continue; 860 } 861 } 862 863 /***************************************************************************** 864 * Initialize MCS7840 -- Write Init values to corresponding Registers 865 * 866 * Register Index 867 * 1 : IER 868 * 2 : FCR 869 * 3 : LCR 870 * 4 : MCR 871 * 872 * 0x08 : SP1/2 Control Reg 873 *****************************************************************************/ 874 875 /* NEED to check the following Block */ 876 877 Data = 0x0; 878 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 879 if (status < 0) { 880 dbg("Reading Spreg failed\n"); 881 return -1; 882 } 883 Data |= 0x80; 884 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 885 if (status < 0) { 886 dbg("writing Spreg failed\n"); 887 return -1; 888 } 889 890 Data &= ~0x80; 891 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 892 if (status < 0) { 893 dbg("writing Spreg failed\n"); 894 return -1; 895 } 896 /* End of block to be checked */ 897 898 Data = 0x0; 899 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 900 &Data); 901 if (status < 0) { 902 dbg("Reading Controlreg failed\n"); 903 return -1; 904 } 905 Data |= 0x08; /* Driver done bit */ 906 Data |= 0x20; /* rx_disable */ 907 status = mos7840_set_reg_sync(port, 908 mos7840_port->ControlRegOffset, Data); 909 if (status < 0) { 910 dbg("writing Controlreg failed\n"); 911 return -1; 912 } 913 /* do register settings here */ 914 /* Set all regs to the device default values. */ 915 /*********************************** 916 * First Disable all interrupts. 917 ***********************************/ 918 Data = 0x00; 919 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 920 if (status < 0) { 921 dbg("disableing interrupts failed\n"); 922 return -1; 923 } 924 /* Set FIFO_CONTROL_REGISTER to the default value */ 925 Data = 0x00; 926 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 927 if (status < 0) { 928 dbg("Writing FIFO_CONTROL_REGISTER failed\n"); 929 return -1; 930 } 931 932 Data = 0xcf; 933 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 934 if (status < 0) { 935 dbg("Writing FIFO_CONTROL_REGISTER failed\n"); 936 return -1; 937 } 938 939 Data = 0x03; 940 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 941 mos7840_port->shadowLCR = Data; 942 943 Data = 0x0b; 944 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 945 mos7840_port->shadowMCR = Data; 946 947 Data = 0x00; 948 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 949 mos7840_port->shadowLCR = Data; 950 951 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 952 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 953 954 Data = 0x0c; 955 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 956 957 Data = 0x0; 958 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 959 960 Data = 0x00; 961 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 962 963 Data = Data & ~SERIAL_LCR_DLAB; 964 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 965 mos7840_port->shadowLCR = Data; 966 967 /* clearing Bulkin and Bulkout Fifo */ 968 Data = 0x0; 969 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 970 971 Data = Data | 0x0c; 972 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 973 974 Data = Data & ~0x0c; 975 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 976 /* Finally enable all interrupts */ 977 Data = 0x0c; 978 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 979 980 /* clearing rx_disable */ 981 Data = 0x0; 982 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 983 &Data); 984 Data = Data & ~0x20; 985 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 986 Data); 987 988 /* rx_negate */ 989 Data = 0x0; 990 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 991 &Data); 992 Data = Data | 0x10; 993 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 994 Data); 995 996 /* force low_latency on so that our tty_push actually forces * 997 * the data through,otherwise it is scheduled, and with * 998 * high data rates (like with OHCI) data can get lost. */ 999 if (tty) 1000 tty->low_latency = 1; 1001 1002 /* Check to see if we've set up our endpoint info yet * 1003 * (can't set it up in mos7840_startup as the structures * 1004 * were not set up at that time.) */ 1005 if (port0->open_ports == 1) { 1006 if (serial->port[0]->interrupt_in_buffer == NULL) { 1007 /* set up interrupt urb */ 1008 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1009 serial->dev, 1010 usb_rcvintpipe(serial->dev, 1011 serial->port[0]->interrupt_in_endpointAddress), 1012 serial->port[0]->interrupt_in_buffer, 1013 serial->port[0]->interrupt_in_urb-> 1014 transfer_buffer_length, 1015 mos7840_interrupt_callback, 1016 serial, 1017 serial->port[0]->interrupt_in_urb->interval); 1018 1019 /* start interrupt read for mos7840 * 1020 * will continue as long as mos7840 is connected */ 1021 1022 response = 1023 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1024 GFP_KERNEL); 1025 if (response) { 1026 dev_err(&port->dev, "%s - Error %d submitting " 1027 "interrupt urb\n", __func__, response); 1028 } 1029 1030 } 1031 1032 } 1033 1034 /* see if we've set up our endpoint info yet * 1035 * (can't set it up in mos7840_startup as the * 1036 * structures were not set up at that time.) */ 1037 1038 dbg("port number is %d \n", port->number); 1039 dbg("serial number is %d \n", port->serial->minor); 1040 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress); 1041 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress); 1042 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress); 1043 dbg("port's number in the device is %d\n", mos7840_port->port_num); 1044 mos7840_port->read_urb = port->read_urb; 1045 1046 /* set up our bulk in urb */ 1047 1048 usb_fill_bulk_urb(mos7840_port->read_urb, 1049 serial->dev, 1050 usb_rcvbulkpipe(serial->dev, 1051 port->bulk_in_endpointAddress), 1052 port->bulk_in_buffer, 1053 mos7840_port->read_urb->transfer_buffer_length, 1054 mos7840_bulk_in_callback, mos7840_port); 1055 1056 dbg("mos7840_open: bulkin endpoint is %d\n", 1057 port->bulk_in_endpointAddress); 1058 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1059 if (response) { 1060 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1061 __func__, response); 1062 } 1063 1064 /* initialize our wait queues */ 1065 init_waitqueue_head(&mos7840_port->wait_chase); 1066 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1067 1068 /* initialize our icount structure */ 1069 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1070 1071 /* initialize our port settings */ 1072 /* Must set to enable ints! */ 1073 mos7840_port->shadowMCR = MCR_MASTER_IE; 1074 /* send a open port command */ 1075 mos7840_port->open = 1; 1076 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1077 mos7840_port->icount.tx = 0; 1078 mos7840_port->icount.rx = 0; 1079 1080 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", 1081 serial, mos7840_port, port); 1082 1083 return 0; 1084 1085 } 1086 1087 /***************************************************************************** 1088 * mos7840_chars_in_buffer 1089 * this function is called by the tty driver when it wants to know how many 1090 * bytes of data we currently have outstanding in the port (data that has 1091 * been written, but hasn't made it out the port yet) 1092 * If successful, we return the number of bytes left to be written in the 1093 * system, 1094 * Otherwise we return zero. 1095 *****************************************************************************/ 1096 1097 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1098 { 1099 struct usb_serial_port *port = tty->driver_data; 1100 int i; 1101 int chars = 0; 1102 unsigned long flags; 1103 struct moschip_port *mos7840_port; 1104 1105 dbg("%s \n", " mos7840_chars_in_buffer:entering ..........."); 1106 1107 if (mos7840_port_paranoia_check(port, __func__)) { 1108 dbg("%s", "Invalid port \n"); 1109 return 0; 1110 } 1111 1112 mos7840_port = mos7840_get_port_private(port); 1113 if (mos7840_port == NULL) { 1114 dbg("%s \n", "mos7840_break:leaving ..........."); 1115 return 0; 1116 } 1117 1118 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1119 for (i = 0; i < NUM_URBS; ++i) 1120 if (mos7840_port->busy[i]) 1121 chars += URB_TRANSFER_BUFFER_SIZE; 1122 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1123 dbg("%s - returns %d", __func__, chars); 1124 return chars; 1125 1126 } 1127 1128 /************************************************************************ 1129 * 1130 * mos7840_block_until_tx_empty 1131 * 1132 * This function will block the close until one of the following: 1133 * 1. TX count are 0 1134 * 2. The mos7840 has stopped 1135 * 3. A timeout of 3 seconds without activity has expired 1136 * 1137 ************************************************************************/ 1138 static void mos7840_block_until_tx_empty(struct tty_struct *tty, 1139 struct moschip_port *mos7840_port) 1140 { 1141 int timeout = HZ / 10; 1142 int wait = 30; 1143 int count; 1144 1145 while (1) { 1146 1147 count = mos7840_chars_in_buffer(tty); 1148 1149 /* Check for Buffer status */ 1150 if (count <= 0) 1151 return; 1152 1153 /* Block the thread for a while */ 1154 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1155 timeout); 1156 1157 /* No activity.. count down section */ 1158 wait--; 1159 if (wait == 0) { 1160 dbg("%s - TIMEOUT", __func__); 1161 return; 1162 } else { 1163 /* Reset timeout value back to seconds */ 1164 wait = 30; 1165 } 1166 } 1167 } 1168 1169 /***************************************************************************** 1170 * mos7840_close 1171 * this function is called by the tty driver when a port is closed 1172 *****************************************************************************/ 1173 1174 static void mos7840_close(struct tty_struct *tty, 1175 struct usb_serial_port *port, struct file *filp) 1176 { 1177 struct usb_serial *serial; 1178 struct moschip_port *mos7840_port; 1179 struct moschip_port *port0; 1180 int j; 1181 __u16 Data; 1182 1183 dbg("%s\n", "mos7840_close:entering..."); 1184 1185 if (mos7840_port_paranoia_check(port, __func__)) { 1186 dbg("%s", "Port Paranoia failed \n"); 1187 return; 1188 } 1189 1190 serial = mos7840_get_usb_serial(port, __func__); 1191 if (!serial) { 1192 dbg("%s", "Serial Paranoia failed \n"); 1193 return; 1194 } 1195 1196 mos7840_port = mos7840_get_port_private(port); 1197 port0 = mos7840_get_port_private(serial->port[0]); 1198 1199 if (mos7840_port == NULL || port0 == NULL) 1200 return; 1201 1202 for (j = 0; j < NUM_URBS; ++j) 1203 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1204 1205 /* Freeing Write URBs */ 1206 for (j = 0; j < NUM_URBS; ++j) { 1207 if (mos7840_port->write_urb_pool[j]) { 1208 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1209 kfree(mos7840_port->write_urb_pool[j]-> 1210 transfer_buffer); 1211 1212 usb_free_urb(mos7840_port->write_urb_pool[j]); 1213 } 1214 } 1215 1216 if (serial->dev) 1217 /* flush and block until tx is empty */ 1218 mos7840_block_until_tx_empty(tty, mos7840_port); 1219 1220 /* While closing port, shutdown all bulk read, write * 1221 * and interrupt read if they exists */ 1222 if (serial->dev) { 1223 if (mos7840_port->write_urb) { 1224 dbg("%s", "Shutdown bulk write\n"); 1225 usb_kill_urb(mos7840_port->write_urb); 1226 } 1227 if (mos7840_port->read_urb) { 1228 dbg("%s", "Shutdown bulk read\n"); 1229 usb_kill_urb(mos7840_port->read_urb); 1230 } 1231 if ((&mos7840_port->control_urb)) { 1232 dbg("%s", "Shutdown control read\n"); 1233 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1234 } 1235 } 1236 /* if(mos7840_port->ctrl_buf != NULL) */ 1237 /* kfree(mos7840_port->ctrl_buf); */ 1238 port0->open_ports--; 1239 dbg("mos7840_num_open_ports in close%d:in port%d\n", 1240 port0->open_ports, port->number); 1241 if (port0->open_ports == 0) { 1242 if (serial->port[0]->interrupt_in_urb) { 1243 dbg("%s", "Shutdown interrupt_in_urb\n"); 1244 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1245 } 1246 } 1247 1248 if (mos7840_port->write_urb) { 1249 /* if this urb had a transfer buffer already (old tx) free it */ 1250 if (mos7840_port->write_urb->transfer_buffer != NULL) 1251 kfree(mos7840_port->write_urb->transfer_buffer); 1252 usb_free_urb(mos7840_port->write_urb); 1253 } 1254 1255 Data = 0x0; 1256 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1257 1258 Data = 0x00; 1259 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1260 1261 mos7840_port->open = 0; 1262 1263 dbg("%s \n", "Leaving ............"); 1264 } 1265 1266 /************************************************************************ 1267 * 1268 * mos7840_block_until_chase_response 1269 * 1270 * This function will block the close until one of the following: 1271 * 1. Response to our Chase comes from mos7840 1272 * 2. A timeout of 10 seconds without activity has expired 1273 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1274 * 1275 ************************************************************************/ 1276 1277 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1278 struct moschip_port *mos7840_port) 1279 { 1280 int timeout = 1 * HZ; 1281 int wait = 10; 1282 int count; 1283 1284 while (1) { 1285 count = mos7840_chars_in_buffer(tty); 1286 1287 /* Check for Buffer status */ 1288 if (count <= 0) 1289 return; 1290 1291 /* Block the thread for a while */ 1292 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1293 timeout); 1294 /* No activity.. count down section */ 1295 wait--; 1296 if (wait == 0) { 1297 dbg("%s - TIMEOUT", __func__); 1298 return; 1299 } else { 1300 /* Reset timeout value back to seconds */ 1301 wait = 10; 1302 } 1303 } 1304 1305 } 1306 1307 /***************************************************************************** 1308 * mos7840_break 1309 * this function sends a break to the port 1310 *****************************************************************************/ 1311 static void mos7840_break(struct tty_struct *tty, int break_state) 1312 { 1313 struct usb_serial_port *port = tty->driver_data; 1314 unsigned char data; 1315 struct usb_serial *serial; 1316 struct moschip_port *mos7840_port; 1317 1318 dbg("%s \n", "Entering ..........."); 1319 dbg("mos7840_break: Start\n"); 1320 1321 if (mos7840_port_paranoia_check(port, __func__)) { 1322 dbg("%s", "Port Paranoia failed \n"); 1323 return; 1324 } 1325 1326 serial = mos7840_get_usb_serial(port, __func__); 1327 if (!serial) { 1328 dbg("%s", "Serial Paranoia failed \n"); 1329 return; 1330 } 1331 1332 mos7840_port = mos7840_get_port_private(port); 1333 1334 if (mos7840_port == NULL) 1335 return; 1336 1337 if (serial->dev) 1338 /* flush and block until tx is empty */ 1339 mos7840_block_until_chase_response(tty, mos7840_port); 1340 1341 if (break_state == -1) 1342 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1343 else 1344 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1345 1346 mos7840_port->shadowLCR = data; 1347 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n", 1348 mos7840_port->shadowLCR); 1349 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1350 mos7840_port->shadowLCR); 1351 1352 return; 1353 } 1354 1355 /***************************************************************************** 1356 * mos7840_write_room 1357 * this function is called by the tty driver when it wants to know how many 1358 * bytes of data we can accept for a specific port. 1359 * If successful, we return the amount of room that we have for this port 1360 * Otherwise we return a negative error number. 1361 *****************************************************************************/ 1362 1363 static int mos7840_write_room(struct tty_struct *tty) 1364 { 1365 struct usb_serial_port *port = tty->driver_data; 1366 int i; 1367 int room = 0; 1368 unsigned long flags; 1369 struct moschip_port *mos7840_port; 1370 1371 dbg("%s \n", " mos7840_write_room:entering ..........."); 1372 1373 if (mos7840_port_paranoia_check(port, __func__)) { 1374 dbg("%s", "Invalid port \n"); 1375 dbg("%s \n", " mos7840_write_room:leaving ..........."); 1376 return -1; 1377 } 1378 1379 mos7840_port = mos7840_get_port_private(port); 1380 if (mos7840_port == NULL) { 1381 dbg("%s \n", "mos7840_break:leaving ..........."); 1382 return -1; 1383 } 1384 1385 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1386 for (i = 0; i < NUM_URBS; ++i) { 1387 if (!mos7840_port->busy[i]) 1388 room += URB_TRANSFER_BUFFER_SIZE; 1389 } 1390 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1391 1392 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1393 dbg("%s - returns %d", __func__, room); 1394 return room; 1395 1396 } 1397 1398 /***************************************************************************** 1399 * mos7840_write 1400 * this function is called by the tty driver when data should be written to 1401 * the port. 1402 * If successful, we return the number of bytes written, otherwise we 1403 * return a negative error number. 1404 *****************************************************************************/ 1405 1406 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1407 const unsigned char *data, int count) 1408 { 1409 int status; 1410 int i; 1411 int bytes_sent = 0; 1412 int transfer_size; 1413 unsigned long flags; 1414 1415 struct moschip_port *mos7840_port; 1416 struct usb_serial *serial; 1417 struct urb *urb; 1418 /* __u16 Data; */ 1419 const unsigned char *current_position = data; 1420 unsigned char *data1; 1421 dbg("%s \n", "entering ..........."); 1422 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1423 mos7840_port->shadowLCR); */ 1424 1425 #ifdef NOTMOS7840 1426 Data = 0x00; 1427 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1428 mos7840_port->shadowLCR = Data; 1429 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data); 1430 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1431 mos7840_port->shadowLCR); 1432 1433 /* Data = 0x03; */ 1434 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1435 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1436 1437 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1438 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1439 1440 /* Data = 0x0c; */ 1441 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1442 Data = 0x00; 1443 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1444 dbg("mos7840_write:DLL value is %x\n", Data); 1445 1446 Data = 0x0; 1447 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1448 dbg("mos7840_write:DLM value is %x\n", Data); 1449 1450 Data = Data & ~SERIAL_LCR_DLAB; 1451 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1452 mos7840_port->shadowLCR); 1453 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1454 #endif 1455 1456 if (mos7840_port_paranoia_check(port, __func__)) { 1457 dbg("%s", "Port Paranoia failed \n"); 1458 return -1; 1459 } 1460 1461 serial = port->serial; 1462 if (mos7840_serial_paranoia_check(serial, __func__)) { 1463 dbg("%s", "Serial Paranoia failed \n"); 1464 return -1; 1465 } 1466 1467 mos7840_port = mos7840_get_port_private(port); 1468 if (mos7840_port == NULL) { 1469 dbg("%s", "mos7840_port is NULL\n"); 1470 return -1; 1471 } 1472 1473 /* try to find a free urb in the list */ 1474 urb = NULL; 1475 1476 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1477 for (i = 0; i < NUM_URBS; ++i) { 1478 if (!mos7840_port->busy[i]) { 1479 mos7840_port->busy[i] = 1; 1480 urb = mos7840_port->write_urb_pool[i]; 1481 dbg("\nURB:%d", i); 1482 break; 1483 } 1484 } 1485 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1486 1487 if (urb == NULL) { 1488 dbg("%s - no more free urbs", __func__); 1489 goto exit; 1490 } 1491 1492 if (urb->transfer_buffer == NULL) { 1493 urb->transfer_buffer = 1494 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1495 1496 if (urb->transfer_buffer == NULL) { 1497 dev_err(&port->dev, "%s no more kernel memory...\n", 1498 __func__); 1499 goto exit; 1500 } 1501 } 1502 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1503 1504 memcpy(urb->transfer_buffer, current_position, transfer_size); 1505 1506 /* fill urb with data and submit */ 1507 usb_fill_bulk_urb(urb, 1508 serial->dev, 1509 usb_sndbulkpipe(serial->dev, 1510 port->bulk_out_endpointAddress), 1511 urb->transfer_buffer, 1512 transfer_size, 1513 mos7840_bulk_out_data_callback, mos7840_port); 1514 1515 data1 = urb->transfer_buffer; 1516 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress); 1517 1518 /* send it down the pipe */ 1519 status = usb_submit_urb(urb, GFP_ATOMIC); 1520 1521 if (status) { 1522 mos7840_port->busy[i] = 0; 1523 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 1524 "with status = %d\n", __func__, status); 1525 bytes_sent = status; 1526 goto exit; 1527 } 1528 bytes_sent = transfer_size; 1529 mos7840_port->icount.tx += transfer_size; 1530 smp_wmb(); 1531 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); 1532 exit: 1533 return bytes_sent; 1534 1535 } 1536 1537 /***************************************************************************** 1538 * mos7840_throttle 1539 * this function is called by the tty driver when it wants to stop the data 1540 * being read from the port. 1541 *****************************************************************************/ 1542 1543 static void mos7840_throttle(struct tty_struct *tty) 1544 { 1545 struct usb_serial_port *port = tty->driver_data; 1546 struct moschip_port *mos7840_port; 1547 int status; 1548 1549 if (mos7840_port_paranoia_check(port, __func__)) { 1550 dbg("%s", "Invalid port \n"); 1551 return; 1552 } 1553 1554 dbg("- port %d\n", port->number); 1555 1556 mos7840_port = mos7840_get_port_private(port); 1557 1558 if (mos7840_port == NULL) 1559 return; 1560 1561 if (!mos7840_port->open) { 1562 dbg("%s\n", "port not opened"); 1563 return; 1564 } 1565 1566 dbg("%s", "Entering .......... \n"); 1567 1568 /* if we are implementing XON/XOFF, send the stop character */ 1569 if (I_IXOFF(tty)) { 1570 unsigned char stop_char = STOP_CHAR(tty); 1571 status = mos7840_write(tty, port, &stop_char, 1); 1572 if (status <= 0) 1573 return; 1574 } 1575 /* if we are implementing RTS/CTS, toggle that line */ 1576 if (tty->termios->c_cflag & CRTSCTS) { 1577 mos7840_port->shadowMCR &= ~MCR_RTS; 1578 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1579 mos7840_port->shadowMCR); 1580 if (status < 0) 1581 return; 1582 } 1583 1584 return; 1585 } 1586 1587 /***************************************************************************** 1588 * mos7840_unthrottle 1589 * this function is called by the tty driver when it wants to resume 1590 * the data being read from the port (called after mos7840_throttle is 1591 * called) 1592 *****************************************************************************/ 1593 static void mos7840_unthrottle(struct tty_struct *tty) 1594 { 1595 struct usb_serial_port *port = tty->driver_data; 1596 int status; 1597 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1598 1599 if (mos7840_port_paranoia_check(port, __func__)) { 1600 dbg("%s", "Invalid port \n"); 1601 return; 1602 } 1603 1604 if (mos7840_port == NULL) 1605 return; 1606 1607 if (!mos7840_port->open) { 1608 dbg("%s - port not opened", __func__); 1609 return; 1610 } 1611 1612 dbg("%s", "Entering .......... \n"); 1613 1614 /* if we are implementing XON/XOFF, send the start character */ 1615 if (I_IXOFF(tty)) { 1616 unsigned char start_char = START_CHAR(tty); 1617 status = mos7840_write(tty, port, &start_char, 1); 1618 if (status <= 0) 1619 return; 1620 } 1621 1622 /* if we are implementing RTS/CTS, toggle that line */ 1623 if (tty->termios->c_cflag & CRTSCTS) { 1624 mos7840_port->shadowMCR |= MCR_RTS; 1625 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1626 mos7840_port->shadowMCR); 1627 if (status < 0) 1628 return; 1629 } 1630 } 1631 1632 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) 1633 { 1634 struct usb_serial_port *port = tty->driver_data; 1635 struct moschip_port *mos7840_port; 1636 unsigned int result; 1637 __u16 msr; 1638 __u16 mcr; 1639 int status; 1640 mos7840_port = mos7840_get_port_private(port); 1641 1642 dbg("%s - port %d", __func__, port->number); 1643 1644 if (mos7840_port == NULL) 1645 return -ENODEV; 1646 1647 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1648 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1649 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1650 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1651 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1652 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1653 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1654 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1655 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1656 1657 dbg("%s - 0x%04X", __func__, result); 1658 1659 return result; 1660 } 1661 1662 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, 1663 unsigned int set, unsigned int clear) 1664 { 1665 struct usb_serial_port *port = tty->driver_data; 1666 struct moschip_port *mos7840_port; 1667 unsigned int mcr; 1668 int status; 1669 1670 dbg("%s - port %d", __func__, port->number); 1671 1672 mos7840_port = mos7840_get_port_private(port); 1673 1674 if (mos7840_port == NULL) 1675 return -ENODEV; 1676 1677 /* FIXME: What locks the port registers ? */ 1678 mcr = mos7840_port->shadowMCR; 1679 if (clear & TIOCM_RTS) 1680 mcr &= ~MCR_RTS; 1681 if (clear & TIOCM_DTR) 1682 mcr &= ~MCR_DTR; 1683 if (clear & TIOCM_LOOP) 1684 mcr &= ~MCR_LOOPBACK; 1685 1686 if (set & TIOCM_RTS) 1687 mcr |= MCR_RTS; 1688 if (set & TIOCM_DTR) 1689 mcr |= MCR_DTR; 1690 if (set & TIOCM_LOOP) 1691 mcr |= MCR_LOOPBACK; 1692 1693 mos7840_port->shadowMCR = mcr; 1694 1695 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1696 if (status < 0) { 1697 dbg("setting MODEM_CONTROL_REGISTER Failed\n"); 1698 return status; 1699 } 1700 1701 return 0; 1702 } 1703 1704 /***************************************************************************** 1705 * mos7840_calc_baud_rate_divisor 1706 * this function calculates the proper baud rate divisor for the specified 1707 * baud rate. 1708 *****************************************************************************/ 1709 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1710 __u16 *clk_sel_val) 1711 { 1712 1713 dbg("%s - %d", __func__, baudRate); 1714 1715 if (baudRate <= 115200) { 1716 *divisor = 115200 / baudRate; 1717 *clk_sel_val = 0x0; 1718 } 1719 if ((baudRate > 115200) && (baudRate <= 230400)) { 1720 *divisor = 230400 / baudRate; 1721 *clk_sel_val = 0x10; 1722 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1723 *divisor = 403200 / baudRate; 1724 *clk_sel_val = 0x20; 1725 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1726 *divisor = 460800 / baudRate; 1727 *clk_sel_val = 0x30; 1728 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1729 *divisor = 806400 / baudRate; 1730 *clk_sel_val = 0x40; 1731 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1732 *divisor = 921600 / baudRate; 1733 *clk_sel_val = 0x50; 1734 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1735 *divisor = 1572864 / baudRate; 1736 *clk_sel_val = 0x60; 1737 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1738 *divisor = 3145728 / baudRate; 1739 *clk_sel_val = 0x70; 1740 } 1741 return 0; 1742 1743 #ifdef NOTMCS7840 1744 1745 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1746 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1747 *divisor = mos7840_divisor_table[i].Divisor; 1748 return 0; 1749 } 1750 } 1751 1752 /* After trying for all the standard baud rates * 1753 * Try calculating the divisor for this baud rate */ 1754 1755 if (baudrate > 75 && baudrate < 230400) { 1756 /* get the divisor */ 1757 custom = (__u16) (230400L / baudrate); 1758 1759 /* Check for round off */ 1760 round1 = (__u16) (2304000L / baudrate); 1761 round = (__u16) (round1 - (custom * 10)); 1762 if (round > 4) 1763 custom++; 1764 *divisor = custom; 1765 1766 dbg(" Baud %d = %d\n", baudrate, custom); 1767 return 0; 1768 } 1769 1770 dbg("%s\n", " Baud calculation Failed..."); 1771 return -1; 1772 #endif 1773 } 1774 1775 /***************************************************************************** 1776 * mos7840_send_cmd_write_baud_rate 1777 * this function sends the proper command to change the baud rate of the 1778 * specified port. 1779 *****************************************************************************/ 1780 1781 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1782 int baudRate) 1783 { 1784 int divisor = 0; 1785 int status; 1786 __u16 Data; 1787 unsigned char number; 1788 __u16 clk_sel_val; 1789 struct usb_serial_port *port; 1790 1791 if (mos7840_port == NULL) 1792 return -1; 1793 1794 port = (struct usb_serial_port *)mos7840_port->port; 1795 if (mos7840_port_paranoia_check(port, __func__)) { 1796 dbg("%s", "Invalid port \n"); 1797 return -1; 1798 } 1799 1800 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1801 dbg("%s", "Invalid Serial \n"); 1802 return -1; 1803 } 1804 1805 dbg("%s", "Entering .......... \n"); 1806 1807 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1808 1809 dbg("%s - port = %d, baud = %d", __func__, 1810 mos7840_port->port->number, baudRate); 1811 /* reset clk_uart_sel in spregOffset */ 1812 if (baudRate > 115200) { 1813 #ifdef HW_flow_control 1814 /* NOTE: need to see the pther register to modify */ 1815 /* setting h/w flow control bit to 1 */ 1816 Data = 0x2b; 1817 mos7840_port->shadowMCR = Data; 1818 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1819 Data); 1820 if (status < 0) { 1821 dbg("Writing spreg failed in set_serial_baud\n"); 1822 return -1; 1823 } 1824 #endif 1825 1826 } else { 1827 #ifdef HW_flow_control 1828 / *setting h/w flow control bit to 0 */ 1829 Data = 0xb; 1830 mos7840_port->shadowMCR = Data; 1831 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1832 Data); 1833 if (status < 0) { 1834 dbg("Writing spreg failed in set_serial_baud\n"); 1835 return -1; 1836 } 1837 #endif 1838 1839 } 1840 1841 if (1) { /* baudRate <= 115200) */ 1842 clk_sel_val = 0x0; 1843 Data = 0x0; 1844 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1845 &clk_sel_val); 1846 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1847 &Data); 1848 if (status < 0) { 1849 dbg("reading spreg failed in set_serial_baud\n"); 1850 return -1; 1851 } 1852 Data = (Data & 0x8f) | clk_sel_val; 1853 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1854 Data); 1855 if (status < 0) { 1856 dbg("Writing spreg failed in set_serial_baud\n"); 1857 return -1; 1858 } 1859 /* Calculate the Divisor */ 1860 1861 if (status) { 1862 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1863 return status; 1864 } 1865 /* Enable access to divisor latch */ 1866 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1867 mos7840_port->shadowLCR = Data; 1868 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1869 1870 /* Write the divisor */ 1871 Data = (unsigned char)(divisor & 0xff); 1872 dbg("set_serial_baud Value to write DLL is %x\n", Data); 1873 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1874 1875 Data = (unsigned char)((divisor & 0xff00) >> 8); 1876 dbg("set_serial_baud Value to write DLM is %x\n", Data); 1877 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1878 1879 /* Disable access to divisor latch */ 1880 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1881 mos7840_port->shadowLCR = Data; 1882 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1883 1884 } 1885 return status; 1886 } 1887 1888 /***************************************************************************** 1889 * mos7840_change_port_settings 1890 * This routine is called to set the UART on the device to match 1891 * the specified new settings. 1892 *****************************************************************************/ 1893 1894 static void mos7840_change_port_settings(struct tty_struct *tty, 1895 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1896 { 1897 int baud; 1898 unsigned cflag; 1899 unsigned iflag; 1900 __u8 lData; 1901 __u8 lParity; 1902 __u8 lStop; 1903 int status; 1904 __u16 Data; 1905 struct usb_serial_port *port; 1906 struct usb_serial *serial; 1907 1908 if (mos7840_port == NULL) 1909 return; 1910 1911 port = (struct usb_serial_port *)mos7840_port->port; 1912 1913 if (mos7840_port_paranoia_check(port, __func__)) { 1914 dbg("%s", "Invalid port \n"); 1915 return; 1916 } 1917 1918 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1919 dbg("%s", "Invalid Serial \n"); 1920 return; 1921 } 1922 1923 serial = port->serial; 1924 1925 dbg("%s - port %d", __func__, mos7840_port->port->number); 1926 1927 if (!mos7840_port->open) { 1928 dbg("%s - port not opened", __func__); 1929 return; 1930 } 1931 1932 dbg("%s", "Entering .......... \n"); 1933 1934 lData = LCR_BITS_8; 1935 lStop = LCR_STOP_1; 1936 lParity = LCR_PAR_NONE; 1937 1938 cflag = tty->termios->c_cflag; 1939 iflag = tty->termios->c_iflag; 1940 1941 /* Change the number of bits */ 1942 if (cflag & CSIZE) { 1943 switch (cflag & CSIZE) { 1944 case CS5: 1945 lData = LCR_BITS_5; 1946 break; 1947 1948 case CS6: 1949 lData = LCR_BITS_6; 1950 break; 1951 1952 case CS7: 1953 lData = LCR_BITS_7; 1954 break; 1955 default: 1956 case CS8: 1957 lData = LCR_BITS_8; 1958 break; 1959 } 1960 } 1961 /* Change the Parity bit */ 1962 if (cflag & PARENB) { 1963 if (cflag & PARODD) { 1964 lParity = LCR_PAR_ODD; 1965 dbg("%s - parity = odd", __func__); 1966 } else { 1967 lParity = LCR_PAR_EVEN; 1968 dbg("%s - parity = even", __func__); 1969 } 1970 1971 } else { 1972 dbg("%s - parity = none", __func__); 1973 } 1974 1975 if (cflag & CMSPAR) 1976 lParity = lParity | 0x20; 1977 1978 /* Change the Stop bit */ 1979 if (cflag & CSTOPB) { 1980 lStop = LCR_STOP_2; 1981 dbg("%s - stop bits = 2", __func__); 1982 } else { 1983 lStop = LCR_STOP_1; 1984 dbg("%s - stop bits = 1", __func__); 1985 } 1986 1987 /* Update the LCR with the correct value */ 1988 mos7840_port->shadowLCR &= 1989 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1990 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1991 1992 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n", 1993 mos7840_port->shadowLCR); 1994 /* Disable Interrupts */ 1995 Data = 0x00; 1996 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1997 1998 Data = 0x00; 1999 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2000 2001 Data = 0xcf; 2002 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2003 2004 /* Send the updated LCR value to the mos7840 */ 2005 Data = mos7840_port->shadowLCR; 2006 2007 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 2008 2009 Data = 0x00b; 2010 mos7840_port->shadowMCR = Data; 2011 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2012 Data = 0x00b; 2013 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2014 2015 /* set up the MCR register and send it to the mos7840 */ 2016 2017 mos7840_port->shadowMCR = MCR_MASTER_IE; 2018 if (cflag & CBAUD) 2019 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2020 2021 if (cflag & CRTSCTS) 2022 mos7840_port->shadowMCR |= (MCR_XON_ANY); 2023 else 2024 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2025 2026 Data = mos7840_port->shadowMCR; 2027 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2028 2029 /* Determine divisor based on baud rate */ 2030 baud = tty_get_baud_rate(tty); 2031 2032 if (!baud) { 2033 /* pick a default, any default... */ 2034 dbg("%s\n", "Picked default baud..."); 2035 baud = 9600; 2036 } 2037 2038 dbg("%s - baud rate = %d", __func__, baud); 2039 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2040 2041 /* Enable Interrupts */ 2042 Data = 0x0c; 2043 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2044 2045 if (mos7840_port->read_urb->status != -EINPROGRESS) { 2046 mos7840_port->read_urb->dev = serial->dev; 2047 2048 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2049 2050 if (status) { 2051 dbg(" usb_submit_urb(read bulk) failed, status = %d", 2052 status); 2053 } 2054 } 2055 wake_up(&mos7840_port->delta_msr_wait); 2056 mos7840_port->delta_msr_cond = 1; 2057 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n", 2058 mos7840_port->shadowLCR); 2059 2060 return; 2061 } 2062 2063 /***************************************************************************** 2064 * mos7840_set_termios 2065 * this function is called by the tty driver when it wants to change 2066 * the termios structure 2067 *****************************************************************************/ 2068 2069 static void mos7840_set_termios(struct tty_struct *tty, 2070 struct usb_serial_port *port, 2071 struct ktermios *old_termios) 2072 { 2073 int status; 2074 unsigned int cflag; 2075 struct usb_serial *serial; 2076 struct moschip_port *mos7840_port; 2077 dbg("mos7840_set_termios: START\n"); 2078 if (mos7840_port_paranoia_check(port, __func__)) { 2079 dbg("%s", "Invalid port \n"); 2080 return; 2081 } 2082 2083 serial = port->serial; 2084 2085 if (mos7840_serial_paranoia_check(serial, __func__)) { 2086 dbg("%s", "Invalid Serial \n"); 2087 return; 2088 } 2089 2090 mos7840_port = mos7840_get_port_private(port); 2091 2092 if (mos7840_port == NULL) 2093 return; 2094 2095 if (!mos7840_port->open) { 2096 dbg("%s - port not opened", __func__); 2097 return; 2098 } 2099 2100 dbg("%s\n", "setting termios - "); 2101 2102 cflag = tty->termios->c_cflag; 2103 2104 dbg("%s - clfag %08x iflag %08x", __func__, 2105 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2106 dbg("%s - old clfag %08x old iflag %08x", __func__, 2107 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2108 dbg("%s - port %d", __func__, port->number); 2109 2110 /* change the port settings to the new ones specified */ 2111 2112 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2113 2114 if (!mos7840_port->read_urb) { 2115 dbg("%s", "URB KILLED !!!!!\n"); 2116 return; 2117 } 2118 2119 if (mos7840_port->read_urb->status != -EINPROGRESS) { 2120 mos7840_port->read_urb->dev = serial->dev; 2121 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2122 if (status) { 2123 dbg(" usb_submit_urb(read bulk) failed, status = %d", 2124 status); 2125 } 2126 } 2127 return; 2128 } 2129 2130 /***************************************************************************** 2131 * mos7840_get_lsr_info - get line status register info 2132 * 2133 * Purpose: Let user call ioctl() to get info when the UART physically 2134 * is emptied. On bus types like RS485, the transmitter must 2135 * release the bus after transmitting. This must be done when 2136 * the transmit shift register is empty, not be done when the 2137 * transmit holding register is empty. This functionality 2138 * allows an RS485 driver to be written in user space. 2139 *****************************************************************************/ 2140 2141 static int mos7840_get_lsr_info(struct tty_struct *tty, 2142 unsigned int __user *value) 2143 { 2144 int count; 2145 unsigned int result = 0; 2146 2147 count = mos7840_chars_in_buffer(tty); 2148 if (count == 0) { 2149 dbg("%s -- Empty", __func__); 2150 result = TIOCSER_TEMT; 2151 } 2152 2153 if (copy_to_user(value, &result, sizeof(int))) 2154 return -EFAULT; 2155 return 0; 2156 } 2157 2158 /***************************************************************************** 2159 * mos7840_set_modem_info 2160 * function to set modem info 2161 *****************************************************************************/ 2162 2163 /* FIXME: Should be using the model control hooks */ 2164 2165 static int mos7840_set_modem_info(struct moschip_port *mos7840_port, 2166 unsigned int cmd, unsigned int __user *value) 2167 { 2168 unsigned int mcr; 2169 unsigned int arg; 2170 __u16 Data; 2171 int status; 2172 struct usb_serial_port *port; 2173 2174 if (mos7840_port == NULL) 2175 return -1; 2176 2177 port = (struct usb_serial_port *)mos7840_port->port; 2178 if (mos7840_port_paranoia_check(port, __func__)) { 2179 dbg("%s", "Invalid port \n"); 2180 return -1; 2181 } 2182 2183 mcr = mos7840_port->shadowMCR; 2184 2185 if (copy_from_user(&arg, value, sizeof(int))) 2186 return -EFAULT; 2187 2188 switch (cmd) { 2189 case TIOCMBIS: 2190 if (arg & TIOCM_RTS) 2191 mcr |= MCR_RTS; 2192 if (arg & TIOCM_DTR) 2193 mcr |= MCR_RTS; 2194 if (arg & TIOCM_LOOP) 2195 mcr |= MCR_LOOPBACK; 2196 break; 2197 2198 case TIOCMBIC: 2199 if (arg & TIOCM_RTS) 2200 mcr &= ~MCR_RTS; 2201 if (arg & TIOCM_DTR) 2202 mcr &= ~MCR_RTS; 2203 if (arg & TIOCM_LOOP) 2204 mcr &= ~MCR_LOOPBACK; 2205 break; 2206 2207 case TIOCMSET: 2208 /* turn off the RTS and DTR and LOOPBACK 2209 * and then only turn on what was asked to */ 2210 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); 2211 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); 2212 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); 2213 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); 2214 break; 2215 } 2216 2217 mos7840_port->shadowMCR = mcr; 2218 2219 Data = mos7840_port->shadowMCR; 2220 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2221 if (status < 0) { 2222 dbg("setting MODEM_CONTROL_REGISTER Failed\n"); 2223 return -1; 2224 } 2225 2226 return 0; 2227 } 2228 2229 /***************************************************************************** 2230 * mos7840_get_modem_info 2231 * function to get modem info 2232 *****************************************************************************/ 2233 2234 static int mos7840_get_modem_info(struct moschip_port *mos7840_port, 2235 unsigned int __user *value) 2236 { 2237 unsigned int result = 0; 2238 __u16 msr; 2239 unsigned int mcr = mos7840_port->shadowMCR; 2240 mos7840_get_uart_reg(mos7840_port->port, 2241 MODEM_STATUS_REGISTER, &msr); 2242 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ 2243 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ 2244 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ 2245 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ 2246 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ 2247 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ 2248 2249 dbg("%s -- %x", __func__, result); 2250 2251 if (copy_to_user(value, &result, sizeof(int))) 2252 return -EFAULT; 2253 return 0; 2254 } 2255 2256 /***************************************************************************** 2257 * mos7840_get_serial_info 2258 * function to get information about serial port 2259 *****************************************************************************/ 2260 2261 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2262 struct serial_struct __user *retinfo) 2263 { 2264 struct serial_struct tmp; 2265 2266 if (mos7840_port == NULL) 2267 return -1; 2268 2269 if (!retinfo) 2270 return -EFAULT; 2271 2272 memset(&tmp, 0, sizeof(tmp)); 2273 2274 tmp.type = PORT_16550A; 2275 tmp.line = mos7840_port->port->serial->minor; 2276 tmp.port = mos7840_port->port->number; 2277 tmp.irq = 0; 2278 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2279 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2280 tmp.baud_base = 9600; 2281 tmp.close_delay = 5 * HZ; 2282 tmp.closing_wait = 30 * HZ; 2283 2284 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2285 return -EFAULT; 2286 return 0; 2287 } 2288 2289 /***************************************************************************** 2290 * SerialIoctl 2291 * this function handles any ioctl calls to the driver 2292 *****************************************************************************/ 2293 2294 static int mos7840_ioctl(struct tty_struct *tty, struct file *file, 2295 unsigned int cmd, unsigned long arg) 2296 { 2297 struct usb_serial_port *port = tty->driver_data; 2298 void __user *argp = (void __user *)arg; 2299 struct moschip_port *mos7840_port; 2300 2301 struct async_icount cnow; 2302 struct async_icount cprev; 2303 struct serial_icounter_struct icount; 2304 int mosret = 0; 2305 2306 if (mos7840_port_paranoia_check(port, __func__)) { 2307 dbg("%s", "Invalid port \n"); 2308 return -1; 2309 } 2310 2311 mos7840_port = mos7840_get_port_private(port); 2312 2313 if (mos7840_port == NULL) 2314 return -1; 2315 2316 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2317 2318 switch (cmd) { 2319 /* return number of bytes available */ 2320 2321 case TIOCSERGETLSR: 2322 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2323 return mos7840_get_lsr_info(tty, argp); 2324 return 0; 2325 2326 /* FIXME: use the modem hooks and remove this */ 2327 case TIOCMBIS: 2328 case TIOCMBIC: 2329 case TIOCMSET: 2330 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__, 2331 port->number); 2332 mosret = 2333 mos7840_set_modem_info(mos7840_port, cmd, argp); 2334 return mosret; 2335 2336 case TIOCMGET: 2337 dbg("%s (%d) TIOCMGET", __func__, port->number); 2338 return mos7840_get_modem_info(mos7840_port, argp); 2339 2340 case TIOCGSERIAL: 2341 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2342 return mos7840_get_serial_info(mos7840_port, argp); 2343 2344 case TIOCSSERIAL: 2345 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2346 break; 2347 2348 case TIOCMIWAIT: 2349 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2350 cprev = mos7840_port->icount; 2351 while (1) { 2352 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2353 mos7840_port->delta_msr_cond = 0; 2354 wait_event_interruptible(mos7840_port->delta_msr_wait, 2355 (mos7840_port-> 2356 delta_msr_cond == 1)); 2357 2358 /* see if a signal did it */ 2359 if (signal_pending(current)) 2360 return -ERESTARTSYS; 2361 cnow = mos7840_port->icount; 2362 smp_rmb(); 2363 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2364 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2365 return -EIO; /* no change => error */ 2366 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2367 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2368 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2369 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2370 return 0; 2371 } 2372 cprev = cnow; 2373 } 2374 /* NOTREACHED */ 2375 break; 2376 2377 case TIOCGICOUNT: 2378 cnow = mos7840_port->icount; 2379 smp_rmb(); 2380 icount.cts = cnow.cts; 2381 icount.dsr = cnow.dsr; 2382 icount.rng = cnow.rng; 2383 icount.dcd = cnow.dcd; 2384 icount.rx = cnow.rx; 2385 icount.tx = cnow.tx; 2386 icount.frame = cnow.frame; 2387 icount.overrun = cnow.overrun; 2388 icount.parity = cnow.parity; 2389 icount.brk = cnow.brk; 2390 icount.buf_overrun = cnow.buf_overrun; 2391 2392 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2393 port->number, icount.rx, icount.tx); 2394 if (copy_to_user(argp, &icount, sizeof(icount))) 2395 return -EFAULT; 2396 return 0; 2397 default: 2398 break; 2399 } 2400 return -ENOIOCTLCMD; 2401 } 2402 2403 static int mos7840_calc_num_ports(struct usb_serial *serial) 2404 { 2405 int mos7840_num_ports = 0; 2406 2407 dbg("numberofendpoints: %d \n", 2408 (int)serial->interface->cur_altsetting->desc.bNumEndpoints); 2409 dbg("numberofendpoints: %d \n", 2410 (int)serial->interface->altsetting->desc.bNumEndpoints); 2411 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2412 mos7840_num_ports = serial->num_ports = 2; 2413 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2414 serial->num_bulk_in = 4; 2415 serial->num_bulk_out = 4; 2416 mos7840_num_ports = serial->num_ports = 4; 2417 } 2418 2419 return mos7840_num_ports; 2420 } 2421 2422 /**************************************************************************** 2423 * mos7840_startup 2424 ****************************************************************************/ 2425 2426 static int mos7840_startup(struct usb_serial *serial) 2427 { 2428 struct moschip_port *mos7840_port; 2429 struct usb_device *dev; 2430 int i, status; 2431 2432 __u16 Data; 2433 dbg("%s \n", " mos7840_startup :entering.........."); 2434 2435 if (!serial) { 2436 dbg("%s\n", "Invalid Handler"); 2437 return -1; 2438 } 2439 2440 dev = serial->dev; 2441 2442 dbg("%s\n", "Entering..."); 2443 2444 /* we set up the pointers to the endpoints in the mos7840_open * 2445 * function, as the structures aren't created yet. */ 2446 2447 /* set up port private structures */ 2448 for (i = 0; i < serial->num_ports; ++i) { 2449 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2450 if (mos7840_port == NULL) { 2451 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2452 status = -ENOMEM; 2453 i--; /* don't follow NULL pointer cleaning up */ 2454 goto error; 2455 } 2456 2457 /* Initialize all port interrupt end point to port 0 int 2458 * endpoint. Our device has only one interrupt end point 2459 * common to all port */ 2460 2461 mos7840_port->port = serial->port[i]; 2462 mos7840_set_port_private(serial->port[i], mos7840_port); 2463 spin_lock_init(&mos7840_port->pool_lock); 2464 2465 mos7840_port->port_num = ((serial->port[i]->number - 2466 (serial->port[i]->serial->minor)) + 2467 1); 2468 2469 if (mos7840_port->port_num == 1) { 2470 mos7840_port->SpRegOffset = 0x0; 2471 mos7840_port->ControlRegOffset = 0x1; 2472 mos7840_port->DcrRegOffset = 0x4; 2473 } else if ((mos7840_port->port_num == 2) 2474 && (serial->num_ports == 4)) { 2475 mos7840_port->SpRegOffset = 0x8; 2476 mos7840_port->ControlRegOffset = 0x9; 2477 mos7840_port->DcrRegOffset = 0x16; 2478 } else if ((mos7840_port->port_num == 2) 2479 && (serial->num_ports == 2)) { 2480 mos7840_port->SpRegOffset = 0xa; 2481 mos7840_port->ControlRegOffset = 0xb; 2482 mos7840_port->DcrRegOffset = 0x19; 2483 } else if ((mos7840_port->port_num == 3) 2484 && (serial->num_ports == 4)) { 2485 mos7840_port->SpRegOffset = 0xa; 2486 mos7840_port->ControlRegOffset = 0xb; 2487 mos7840_port->DcrRegOffset = 0x19; 2488 } else if ((mos7840_port->port_num == 4) 2489 && (serial->num_ports == 4)) { 2490 mos7840_port->SpRegOffset = 0xc; 2491 mos7840_port->ControlRegOffset = 0xd; 2492 mos7840_port->DcrRegOffset = 0x1c; 2493 } 2494 mos7840_dump_serial_port(mos7840_port); 2495 mos7840_set_port_private(serial->port[i], mos7840_port); 2496 2497 /* enable rx_disable bit in control register */ 2498 status = mos7840_get_reg_sync(serial->port[i], 2499 mos7840_port->ControlRegOffset, &Data); 2500 if (status < 0) { 2501 dbg("Reading ControlReg failed status-0x%x\n", status); 2502 break; 2503 } else 2504 dbg("ControlReg Reading success val is %x, status%d\n", 2505 Data, status); 2506 Data |= 0x08; /* setting driver done bit */ 2507 Data |= 0x04; /* sp1_bit to have cts change reflect in 2508 modem status reg */ 2509 2510 /* Data |= 0x20; //rx_disable bit */ 2511 status = mos7840_set_reg_sync(serial->port[i], 2512 mos7840_port->ControlRegOffset, Data); 2513 if (status < 0) { 2514 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2515 break; 2516 } else 2517 dbg("ControlReg Writing success(rx_disable) status%d\n", 2518 status); 2519 2520 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2521 and 0x24 in DCR3 */ 2522 Data = 0x01; 2523 status = mos7840_set_reg_sync(serial->port[i], 2524 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2525 if (status < 0) { 2526 dbg("Writing DCR0 failed status-0x%x\n", status); 2527 break; 2528 } else 2529 dbg("DCR0 Writing success status%d\n", status); 2530 2531 Data = 0x05; 2532 status = mos7840_set_reg_sync(serial->port[i], 2533 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2534 if (status < 0) { 2535 dbg("Writing DCR1 failed status-0x%x\n", status); 2536 break; 2537 } else 2538 dbg("DCR1 Writing success status%d\n", status); 2539 2540 Data = 0x24; 2541 status = mos7840_set_reg_sync(serial->port[i], 2542 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2543 if (status < 0) { 2544 dbg("Writing DCR2 failed status-0x%x\n", status); 2545 break; 2546 } else 2547 dbg("DCR2 Writing success status%d\n", status); 2548 2549 /* write values in clkstart0x0 and clkmulti 0x20 */ 2550 Data = 0x0; 2551 status = mos7840_set_reg_sync(serial->port[i], 2552 CLK_START_VALUE_REGISTER, Data); 2553 if (status < 0) { 2554 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2555 break; 2556 } else 2557 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2558 2559 Data = 0x20; 2560 status = mos7840_set_reg_sync(serial->port[i], 2561 CLK_MULTI_REGISTER, Data); 2562 if (status < 0) { 2563 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n", 2564 status); 2565 goto error; 2566 } else 2567 dbg("CLK_MULTI_REGISTER Writing success status%d\n", 2568 status); 2569 2570 /* write value 0x0 to scratchpad register */ 2571 Data = 0x00; 2572 status = mos7840_set_uart_reg(serial->port[i], 2573 SCRATCH_PAD_REGISTER, Data); 2574 if (status < 0) { 2575 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", 2576 status); 2577 break; 2578 } else 2579 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n", 2580 status); 2581 2582 /* Zero Length flag register */ 2583 if ((mos7840_port->port_num != 1) 2584 && (serial->num_ports == 2)) { 2585 2586 Data = 0xff; 2587 status = mos7840_set_reg_sync(serial->port[i], 2588 (__u16) (ZLP_REG1 + 2589 ((__u16)mos7840_port->port_num)), Data); 2590 dbg("ZLIP offset%x\n", 2591 (__u16) (ZLP_REG1 + 2592 ((__u16) mos7840_port->port_num))); 2593 if (status < 0) { 2594 dbg("Writing ZLP_REG%d failed status-0x%x\n", 2595 i + 2, status); 2596 break; 2597 } else 2598 dbg("ZLP_REG%d Writing success status%d\n", 2599 i + 2, status); 2600 } else { 2601 Data = 0xff; 2602 status = mos7840_set_reg_sync(serial->port[i], 2603 (__u16) (ZLP_REG1 + 2604 ((__u16)mos7840_port->port_num) - 0x1), Data); 2605 dbg("ZLIP offset%x\n", 2606 (__u16) (ZLP_REG1 + 2607 ((__u16) mos7840_port->port_num) - 0x1)); 2608 if (status < 0) { 2609 dbg("Writing ZLP_REG%d failed status-0x%x\n", 2610 i + 1, status); 2611 break; 2612 } else 2613 dbg("ZLP_REG%d Writing success status%d\n", 2614 i + 1, status); 2615 2616 } 2617 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2618 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2619 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2620 GFP_KERNEL); 2621 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2622 !mos7840_port->dr) { 2623 status = -ENOMEM; 2624 goto error; 2625 } 2626 } 2627 2628 /* Zero Length flag enable */ 2629 Data = 0x0f; 2630 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2631 if (status < 0) { 2632 dbg("Writing ZLP_REG5 failed status-0x%x\n", status); 2633 goto error; 2634 } else 2635 dbg("ZLP_REG5 Writing success status%d\n", status); 2636 2637 /* setting configuration feature to one */ 2638 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2639 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2640 return 0; 2641 error: 2642 for (/* nothing */; i >= 0; i--) { 2643 mos7840_port = mos7840_get_port_private(serial->port[i]); 2644 2645 kfree(mos7840_port->dr); 2646 kfree(mos7840_port->ctrl_buf); 2647 usb_free_urb(mos7840_port->control_urb); 2648 kfree(mos7840_port); 2649 serial->port[i] = NULL; 2650 } 2651 return status; 2652 } 2653 2654 /**************************************************************************** 2655 * mos7840_shutdown 2656 * This function is called whenever the device is removed from the usb bus. 2657 ****************************************************************************/ 2658 2659 static void mos7840_shutdown(struct usb_serial *serial) 2660 { 2661 int i; 2662 unsigned long flags; 2663 struct moschip_port *mos7840_port; 2664 dbg("%s \n", " shutdown :entering.........."); 2665 2666 if (!serial) { 2667 dbg("%s", "Invalid Handler \n"); 2668 return; 2669 } 2670 2671 /* check for the ports to be closed,close the ports and disconnect */ 2672 2673 /* free private structure allocated for serial port * 2674 * stop reads and writes on all ports */ 2675 2676 for (i = 0; i < serial->num_ports; ++i) { 2677 mos7840_port = mos7840_get_port_private(serial->port[i]); 2678 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2679 mos7840_port->zombie = 1; 2680 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2681 usb_kill_urb(mos7840_port->control_urb); 2682 kfree(mos7840_port->ctrl_buf); 2683 kfree(mos7840_port->dr); 2684 kfree(mos7840_port); 2685 mos7840_set_port_private(serial->port[i], NULL); 2686 } 2687 2688 dbg("%s\n", "Thank u :: "); 2689 2690 } 2691 2692 static struct usb_driver io_driver = { 2693 .name = "mos7840", 2694 .probe = usb_serial_probe, 2695 .disconnect = usb_serial_disconnect, 2696 .id_table = moschip_id_table_combined, 2697 .no_dynamic_id = 1, 2698 }; 2699 2700 static struct usb_serial_driver moschip7840_4port_device = { 2701 .driver = { 2702 .owner = THIS_MODULE, 2703 .name = "mos7840", 2704 }, 2705 .description = DRIVER_DESC, 2706 .usb_driver = &io_driver, 2707 .id_table = moschip_port_id_table, 2708 .num_ports = 4, 2709 .open = mos7840_open, 2710 .close = mos7840_close, 2711 .write = mos7840_write, 2712 .write_room = mos7840_write_room, 2713 .chars_in_buffer = mos7840_chars_in_buffer, 2714 .throttle = mos7840_throttle, 2715 .unthrottle = mos7840_unthrottle, 2716 .calc_num_ports = mos7840_calc_num_ports, 2717 #ifdef MCSSerialProbe 2718 .probe = mos7840_serial_probe, 2719 #endif 2720 .ioctl = mos7840_ioctl, 2721 .set_termios = mos7840_set_termios, 2722 .break_ctl = mos7840_break, 2723 .tiocmget = mos7840_tiocmget, 2724 .tiocmset = mos7840_tiocmset, 2725 .attach = mos7840_startup, 2726 .shutdown = mos7840_shutdown, 2727 .read_bulk_callback = mos7840_bulk_in_callback, 2728 .read_int_callback = mos7840_interrupt_callback, 2729 }; 2730 2731 /**************************************************************************** 2732 * moschip7840_init 2733 * This is called by the module subsystem, or on startup to initialize us 2734 ****************************************************************************/ 2735 static int __init moschip7840_init(void) 2736 { 2737 int retval; 2738 2739 dbg("%s \n", " mos7840_init :entering.........."); 2740 2741 /* Register with the usb serial */ 2742 retval = usb_serial_register(&moschip7840_4port_device); 2743 2744 if (retval) 2745 goto failed_port_device_register; 2746 2747 dbg("%s\n", "Entring..."); 2748 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2749 DRIVER_DESC "\n"); 2750 2751 /* Register with the usb */ 2752 retval = usb_register(&io_driver); 2753 if (retval == 0) { 2754 dbg("%s\n", "Leaving..."); 2755 return 0; 2756 } 2757 usb_serial_deregister(&moschip7840_4port_device); 2758 failed_port_device_register: 2759 return retval; 2760 } 2761 2762 /**************************************************************************** 2763 * moschip7840_exit 2764 * Called when the driver is about to be unloaded. 2765 ****************************************************************************/ 2766 static void __exit moschip7840_exit(void) 2767 { 2768 2769 dbg("%s \n", " mos7840_exit :entering.........."); 2770 2771 usb_deregister(&io_driver); 2772 2773 usb_serial_deregister(&moschip7840_4port_device); 2774 2775 dbg("%s\n", "Entring..."); 2776 } 2777 2778 module_init(moschip7840_init); 2779 module_exit(moschip7840_exit); 2780 2781 /* Module information */ 2782 MODULE_DESCRIPTION(DRIVER_DESC); 2783 MODULE_LICENSE("GPL"); 2784 2785 module_param(debug, bool, S_IRUGO | S_IWUSR); 2786 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2787