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 "1.3.2" 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 /* This driver also supports the ATEN UC2324 device since it is mos7840 based 127 * - if I knew the device id it would also support the ATEN UC2322 */ 128 #define USB_VENDOR_ID_ATENINTL 0x0557 129 #define ATENINTL_DEVICE_ID_UC2324 0x2011 130 131 /* Interrupt Routine Defines */ 132 133 #define SERIAL_IIR_RLS 0x06 134 #define SERIAL_IIR_MS 0x00 135 136 /* 137 * Emulation of the bit mask on the LINE STATUS REGISTER. 138 */ 139 #define SERIAL_LSR_DR 0x0001 140 #define SERIAL_LSR_OE 0x0002 141 #define SERIAL_LSR_PE 0x0004 142 #define SERIAL_LSR_FE 0x0008 143 #define SERIAL_LSR_BI 0x0010 144 145 #define MOS_MSR_DELTA_CTS 0x10 146 #define MOS_MSR_DELTA_DSR 0x20 147 #define MOS_MSR_DELTA_RI 0x40 148 #define MOS_MSR_DELTA_CD 0x80 149 150 /* Serial Port register Address */ 151 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 152 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 153 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 154 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 155 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 156 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 157 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 158 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 159 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 160 161 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 162 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 163 164 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 165 166 /* 167 * URB POOL related defines 168 */ 169 #define NUM_URBS 16 /* URB Count */ 170 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 171 172 173 static struct usb_device_id moschip_port_id_table[] = { 174 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 175 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 176 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 177 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 178 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 179 {} /* terminating entry */ 180 }; 181 182 static __devinitdata struct usb_device_id moschip_id_table_combined[] = { 183 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 184 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 185 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 186 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 187 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 188 {} /* terminating entry */ 189 }; 190 191 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); 192 193 /* This structure holds all of the local port information */ 194 195 struct moschip_port { 196 int port_num; /*Actual port number in the device(1,2,etc) */ 197 struct urb *write_urb; /* write URB for this port */ 198 struct urb *read_urb; /* read URB for this port */ 199 struct urb *int_urb; 200 __u8 shadowLCR; /* last LCR value received */ 201 __u8 shadowMCR; /* last MCR value received */ 202 char open; 203 char open_ports; 204 char zombie; 205 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 206 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 207 int delta_msr_cond; 208 struct async_icount icount; 209 struct usb_serial_port *port; /* loop back to the owner of this object */ 210 211 /* Offsets */ 212 __u8 SpRegOffset; 213 __u8 ControlRegOffset; 214 __u8 DcrRegOffset; 215 /* for processing control URBS in interrupt context */ 216 struct urb *control_urb; 217 struct usb_ctrlrequest *dr; 218 char *ctrl_buf; 219 int MsrLsr; 220 221 spinlock_t pool_lock; 222 struct urb *write_urb_pool[NUM_URBS]; 223 char busy[NUM_URBS]; 224 bool read_urb_busy; 225 }; 226 227 228 static int debug; 229 230 /* 231 * mos7840_set_reg_sync 232 * To set the Control register by calling usb_fill_control_urb function 233 * by passing usb_sndctrlpipe function as parameter. 234 */ 235 236 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 237 __u16 val) 238 { 239 struct usb_device *dev = port->serial->dev; 240 val = val & 0x00ff; 241 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 242 243 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 244 MCS_WR_RTYPE, val, reg, NULL, 0, 245 MOS_WDR_TIMEOUT); 246 } 247 248 /* 249 * mos7840_get_reg_sync 250 * To set the Uart register by calling usb_fill_control_urb function by 251 * passing usb_rcvctrlpipe function as parameter. 252 */ 253 254 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 255 __u16 *val) 256 { 257 struct usb_device *dev = port->serial->dev; 258 int ret = 0; 259 260 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 261 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, 262 MOS_WDR_TIMEOUT); 263 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val); 264 *val = (*val) & 0x00ff; 265 return ret; 266 } 267 268 /* 269 * mos7840_set_uart_reg 270 * To set the Uart register by calling usb_fill_control_urb function by 271 * passing usb_sndctrlpipe function as parameter. 272 */ 273 274 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 275 __u16 val) 276 { 277 278 struct usb_device *dev = port->serial->dev; 279 val = val & 0x00ff; 280 /* For the UART control registers, the application number need 281 to be Or'ed */ 282 if (port->serial->num_ports == 4) { 283 val |= (((__u16) port->number - 284 (__u16) (port->serial->minor)) + 1) << 8; 285 dbg("mos7840_set_uart_reg application number is %x\n", val); 286 } else { 287 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 288 val |= (((__u16) port->number - 289 (__u16) (port->serial->minor)) + 1) << 8; 290 dbg("mos7840_set_uart_reg application number is %x\n", 291 val); 292 } else { 293 val |= 294 (((__u16) port->number - 295 (__u16) (port->serial->minor)) + 2) << 8; 296 dbg("mos7840_set_uart_reg application number is %x\n", 297 val); 298 } 299 } 300 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 301 MCS_WR_RTYPE, val, reg, NULL, 0, 302 MOS_WDR_TIMEOUT); 303 304 } 305 306 /* 307 * mos7840_get_uart_reg 308 * To set the Control register by calling usb_fill_control_urb function 309 * by passing usb_rcvctrlpipe function as parameter. 310 */ 311 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 312 __u16 *val) 313 { 314 struct usb_device *dev = port->serial->dev; 315 int ret = 0; 316 __u16 Wval; 317 318 /* dbg("application number is %4x \n", 319 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ 320 /* Wval is same as application number */ 321 if (port->serial->num_ports == 4) { 322 Wval = 323 (((__u16) port->number - (__u16) (port->serial->minor)) + 324 1) << 8; 325 dbg("mos7840_get_uart_reg application number is %x\n", Wval); 326 } else { 327 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 328 Wval = (((__u16) port->number - 329 (__u16) (port->serial->minor)) + 1) << 8; 330 dbg("mos7840_get_uart_reg application number is %x\n", 331 Wval); 332 } else { 333 Wval = (((__u16) port->number - 334 (__u16) (port->serial->minor)) + 2) << 8; 335 dbg("mos7840_get_uart_reg application number is %x\n", 336 Wval); 337 } 338 } 339 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 340 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, 341 MOS_WDR_TIMEOUT); 342 *val = (*val) & 0x00ff; 343 return ret; 344 } 345 346 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 347 { 348 349 dbg("***************************************\n"); 350 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 351 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset); 352 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset); 353 dbg("***************************************\n"); 354 355 } 356 357 /************************************************************************/ 358 /************************************************************************/ 359 /* I N T E R F A C E F U N C T I O N S */ 360 /* I N T E R F A C E F U N C T I O N S */ 361 /************************************************************************/ 362 /************************************************************************/ 363 364 static inline void mos7840_set_port_private(struct usb_serial_port *port, 365 struct moschip_port *data) 366 { 367 usb_set_serial_port_data(port, (void *)data); 368 } 369 370 static inline struct moschip_port *mos7840_get_port_private(struct 371 usb_serial_port 372 *port) 373 { 374 return (struct moschip_port *)usb_get_serial_port_data(port); 375 } 376 377 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 378 { 379 struct moschip_port *mos7840_port; 380 struct async_icount *icount; 381 mos7840_port = port; 382 icount = &mos7840_port->icount; 383 if (new_msr & 384 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 385 MOS_MSR_DELTA_CD)) { 386 icount = &mos7840_port->icount; 387 388 /* update input line counters */ 389 if (new_msr & MOS_MSR_DELTA_CTS) { 390 icount->cts++; 391 smp_wmb(); 392 } 393 if (new_msr & MOS_MSR_DELTA_DSR) { 394 icount->dsr++; 395 smp_wmb(); 396 } 397 if (new_msr & MOS_MSR_DELTA_CD) { 398 icount->dcd++; 399 smp_wmb(); 400 } 401 if (new_msr & MOS_MSR_DELTA_RI) { 402 icount->rng++; 403 smp_wmb(); 404 } 405 } 406 } 407 408 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 409 { 410 struct async_icount *icount; 411 412 dbg("%s - %02x", __func__, new_lsr); 413 414 if (new_lsr & SERIAL_LSR_BI) { 415 /* 416 * Parity and Framing errors only count if they 417 * occur exclusive of a break being 418 * received. 419 */ 420 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 421 } 422 423 /* update input line counters */ 424 icount = &port->icount; 425 if (new_lsr & SERIAL_LSR_BI) { 426 icount->brk++; 427 smp_wmb(); 428 } 429 if (new_lsr & SERIAL_LSR_OE) { 430 icount->overrun++; 431 smp_wmb(); 432 } 433 if (new_lsr & SERIAL_LSR_PE) { 434 icount->parity++; 435 smp_wmb(); 436 } 437 if (new_lsr & SERIAL_LSR_FE) { 438 icount->frame++; 439 smp_wmb(); 440 } 441 } 442 443 /************************************************************************/ 444 /************************************************************************/ 445 /* U S B C A L L B A C K F U N C T I O N S */ 446 /* U S B C A L L B A C K F U N C T I O N S */ 447 /************************************************************************/ 448 /************************************************************************/ 449 450 static void mos7840_control_callback(struct urb *urb) 451 { 452 unsigned char *data; 453 struct moschip_port *mos7840_port; 454 __u8 regval = 0x0; 455 int result = 0; 456 int status = urb->status; 457 458 mos7840_port = urb->context; 459 460 switch (status) { 461 case 0: 462 /* success */ 463 break; 464 case -ECONNRESET: 465 case -ENOENT: 466 case -ESHUTDOWN: 467 /* this urb is terminated, clean up */ 468 dbg("%s - urb shutting down with status: %d", __func__, 469 status); 470 return; 471 default: 472 dbg("%s - nonzero urb status received: %d", __func__, 473 status); 474 goto exit; 475 } 476 477 dbg("%s urb buffer size is %d\n", __func__, urb->actual_length); 478 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__, 479 mos7840_port->MsrLsr, mos7840_port->port_num); 480 data = urb->transfer_buffer; 481 regval = (__u8) data[0]; 482 dbg("%s data is %x\n", __func__, regval); 483 if (mos7840_port->MsrLsr == 0) 484 mos7840_handle_new_msr(mos7840_port, regval); 485 else if (mos7840_port->MsrLsr == 1) 486 mos7840_handle_new_lsr(mos7840_port, regval); 487 488 exit: 489 spin_lock(&mos7840_port->pool_lock); 490 if (!mos7840_port->zombie) 491 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 492 spin_unlock(&mos7840_port->pool_lock); 493 if (result) { 494 dev_err(&urb->dev->dev, 495 "%s - Error %d submitting interrupt urb\n", 496 __func__, result); 497 } 498 } 499 500 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 501 __u16 *val) 502 { 503 struct usb_device *dev = mcs->port->serial->dev; 504 struct usb_ctrlrequest *dr = mcs->dr; 505 unsigned char *buffer = mcs->ctrl_buf; 506 int ret; 507 508 dr->bRequestType = MCS_RD_RTYPE; 509 dr->bRequest = MCS_RDREQ; 510 dr->wValue = cpu_to_le16(Wval); /* 0 */ 511 dr->wIndex = cpu_to_le16(reg); 512 dr->wLength = cpu_to_le16(2); 513 514 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 515 (unsigned char *)dr, buffer, 2, 516 mos7840_control_callback, mcs); 517 mcs->control_urb->transfer_buffer_length = 2; 518 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 519 return ret; 520 } 521 522 /***************************************************************************** 523 * mos7840_interrupt_callback 524 * this is the callback function for when we have received data on the 525 * interrupt endpoint. 526 *****************************************************************************/ 527 528 static void mos7840_interrupt_callback(struct urb *urb) 529 { 530 int result; 531 int length; 532 struct moschip_port *mos7840_port; 533 struct usb_serial *serial; 534 __u16 Data; 535 unsigned char *data; 536 __u8 sp[5], st; 537 int i, rv = 0; 538 __u16 wval, wreg = 0; 539 int status = urb->status; 540 541 dbg("%s", " : Entering\n"); 542 543 switch (status) { 544 case 0: 545 /* success */ 546 break; 547 case -ECONNRESET: 548 case -ENOENT: 549 case -ESHUTDOWN: 550 /* this urb is terminated, clean up */ 551 dbg("%s - urb shutting down with status: %d", __func__, 552 status); 553 return; 554 default: 555 dbg("%s - nonzero urb status received: %d", __func__, 556 status); 557 goto exit; 558 } 559 560 length = urb->actual_length; 561 data = urb->transfer_buffer; 562 563 serial = urb->context; 564 565 /* Moschip get 5 bytes 566 * Byte 1 IIR Port 1 (port.number is 0) 567 * Byte 2 IIR Port 2 (port.number is 1) 568 * Byte 3 IIR Port 3 (port.number is 2) 569 * Byte 4 IIR Port 4 (port.number is 3) 570 * Byte 5 FIFO status for both */ 571 572 if (length && length > 5) { 573 dbg("%s \n", "Wrong data !!!"); 574 return; 575 } 576 577 sp[0] = (__u8) data[0]; 578 sp[1] = (__u8) data[1]; 579 sp[2] = (__u8) data[2]; 580 sp[3] = (__u8) data[3]; 581 st = (__u8) data[4]; 582 583 for (i = 0; i < serial->num_ports; i++) { 584 mos7840_port = mos7840_get_port_private(serial->port[i]); 585 wval = 586 (((__u16) serial->port[i]->number - 587 (__u16) (serial->minor)) + 1) << 8; 588 if (mos7840_port->open) { 589 if (sp[i] & 0x01) { 590 dbg("SP%d No Interrupt !!!\n", i); 591 } else { 592 switch (sp[i] & 0x0f) { 593 case SERIAL_IIR_RLS: 594 dbg("Serial Port %d: Receiver status error or ", i); 595 dbg("address bit detected in 9-bit mode\n"); 596 mos7840_port->MsrLsr = 1; 597 wreg = LINE_STATUS_REGISTER; 598 break; 599 case SERIAL_IIR_MS: 600 dbg("Serial Port %d: Modem status change\n", i); 601 mos7840_port->MsrLsr = 0; 602 wreg = MODEM_STATUS_REGISTER; 603 break; 604 } 605 spin_lock(&mos7840_port->pool_lock); 606 if (!mos7840_port->zombie) { 607 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 608 } else { 609 spin_unlock(&mos7840_port->pool_lock); 610 return; 611 } 612 spin_unlock(&mos7840_port->pool_lock); 613 } 614 } 615 } 616 if (!(rv < 0)) 617 /* the completion handler for the control urb will resubmit */ 618 return; 619 exit: 620 result = usb_submit_urb(urb, GFP_ATOMIC); 621 if (result) { 622 dev_err(&urb->dev->dev, 623 "%s - Error %d submitting interrupt urb\n", 624 __func__, result); 625 } 626 } 627 628 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 629 const char *function) 630 { 631 if (!port) { 632 dbg("%s - port == NULL", function); 633 return -1; 634 } 635 if (!port->serial) { 636 dbg("%s - port->serial == NULL", function); 637 return -1; 638 } 639 640 return 0; 641 } 642 643 /* Inline functions to check the sanity of a pointer that is passed to us */ 644 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 645 const char *function) 646 { 647 if (!serial) { 648 dbg("%s - serial == NULL", function); 649 return -1; 650 } 651 if (!serial->type) { 652 dbg("%s - serial->type == NULL!", function); 653 return -1; 654 } 655 656 return 0; 657 } 658 659 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 660 const char *function) 661 { 662 /* if no port was specified, or it fails a paranoia check */ 663 if (!port || 664 mos7840_port_paranoia_check(port, function) || 665 mos7840_serial_paranoia_check(port->serial, function)) { 666 /* then say that we don't have a valid usb_serial thing, 667 * which will end up genrating -ENODEV return values */ 668 return NULL; 669 } 670 671 return port->serial; 672 } 673 674 /***************************************************************************** 675 * mos7840_bulk_in_callback 676 * this is the callback function for when we have received data on the 677 * bulk in endpoint. 678 *****************************************************************************/ 679 680 static void mos7840_bulk_in_callback(struct urb *urb) 681 { 682 int retval; 683 unsigned char *data; 684 struct usb_serial *serial; 685 struct usb_serial_port *port; 686 struct moschip_port *mos7840_port; 687 struct tty_struct *tty; 688 int status = urb->status; 689 690 mos7840_port = urb->context; 691 if (!mos7840_port) { 692 dbg("%s", "NULL mos7840_port pointer \n"); 693 mos7840_port->read_urb_busy = false; 694 return; 695 } 696 697 if (status) { 698 dbg("nonzero read bulk status received: %d", status); 699 mos7840_port->read_urb_busy = false; 700 return; 701 } 702 703 port = (struct usb_serial_port *)mos7840_port->port; 704 if (mos7840_port_paranoia_check(port, __func__)) { 705 dbg("%s", "Port Paranoia failed \n"); 706 mos7840_port->read_urb_busy = false; 707 return; 708 } 709 710 serial = mos7840_get_usb_serial(port, __func__); 711 if (!serial) { 712 dbg("%s\n", "Bad serial pointer "); 713 mos7840_port->read_urb_busy = false; 714 return; 715 } 716 717 dbg("%s\n", "Entering... \n"); 718 719 data = urb->transfer_buffer; 720 721 dbg("%s", "Entering ........... \n"); 722 723 if (urb->actual_length) { 724 tty = tty_port_tty_get(&mos7840_port->port->port); 725 if (tty) { 726 tty_buffer_request_room(tty, urb->actual_length); 727 tty_insert_flip_string(tty, data, urb->actual_length); 728 dbg(" %s \n", data); 729 tty_flip_buffer_push(tty); 730 tty_kref_put(tty); 731 } 732 mos7840_port->icount.rx += urb->actual_length; 733 smp_wmb(); 734 dbg("mos7840_port->icount.rx is %d:\n", 735 mos7840_port->icount.rx); 736 } 737 738 if (!mos7840_port->read_urb) { 739 dbg("%s", "URB KILLED !!!\n"); 740 mos7840_port->read_urb_busy = false; 741 return; 742 } 743 744 745 mos7840_port->read_urb->dev = serial->dev; 746 747 mos7840_port->read_urb_busy = true; 748 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 749 750 if (retval) { 751 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); 752 mos7840_port->read_urb_busy = false; 753 } 754 } 755 756 /***************************************************************************** 757 * mos7840_bulk_out_data_callback 758 * this is the callback function for when we have finished sending 759 * serial data on the bulk out endpoint. 760 *****************************************************************************/ 761 762 static void mos7840_bulk_out_data_callback(struct urb *urb) 763 { 764 struct moschip_port *mos7840_port; 765 struct tty_struct *tty; 766 int status = urb->status; 767 int i; 768 769 mos7840_port = urb->context; 770 spin_lock(&mos7840_port->pool_lock); 771 for (i = 0; i < NUM_URBS; i++) { 772 if (urb == mos7840_port->write_urb_pool[i]) { 773 mos7840_port->busy[i] = 0; 774 break; 775 } 776 } 777 spin_unlock(&mos7840_port->pool_lock); 778 779 if (status) { 780 dbg("nonzero write bulk status received:%d\n", status); 781 return; 782 } 783 784 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { 785 dbg("%s", "Port Paranoia failed \n"); 786 return; 787 } 788 789 dbg("%s \n", "Entering ........."); 790 791 tty = tty_port_tty_get(&mos7840_port->port->port); 792 if (tty && mos7840_port->open) 793 tty_wakeup(tty); 794 tty_kref_put(tty); 795 796 } 797 798 /************************************************************************/ 799 /* 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 */ 800 /************************************************************************/ 801 #ifdef MCSSerialProbe 802 static int mos7840_serial_probe(struct usb_serial *serial, 803 const struct usb_device_id *id) 804 { 805 806 /*need to implement the mode_reg reading and updating\ 807 structures usb_serial_ device_type\ 808 (i.e num_ports, num_bulkin,bulkout etc) */ 809 /* Also we can update the changes attach */ 810 return 1; 811 } 812 #endif 813 814 /***************************************************************************** 815 * mos7840_open 816 * this function is called by the tty driver when a port is opened 817 * If successful, we return 0 818 * Otherwise we return a negative error number. 819 *****************************************************************************/ 820 821 static int mos7840_open(struct tty_struct *tty, 822 struct usb_serial_port *port, struct file *filp) 823 { 824 int response; 825 int j; 826 struct usb_serial *serial; 827 struct urb *urb; 828 __u16 Data; 829 int status; 830 struct moschip_port *mos7840_port; 831 struct moschip_port *port0; 832 833 if (mos7840_port_paranoia_check(port, __func__)) { 834 dbg("%s", "Port Paranoia failed \n"); 835 return -ENODEV; 836 } 837 838 serial = port->serial; 839 840 if (mos7840_serial_paranoia_check(serial, __func__)) { 841 dbg("%s", "Serial Paranoia failed \n"); 842 return -ENODEV; 843 } 844 845 mos7840_port = mos7840_get_port_private(port); 846 port0 = mos7840_get_port_private(serial->port[0]); 847 848 if (mos7840_port == NULL || port0 == NULL) 849 return -ENODEV; 850 851 usb_clear_halt(serial->dev, port->write_urb->pipe); 852 usb_clear_halt(serial->dev, port->read_urb->pipe); 853 port0->open_ports++; 854 855 /* Initialising the write urb pool */ 856 for (j = 0; j < NUM_URBS; ++j) { 857 urb = usb_alloc_urb(0, GFP_KERNEL); 858 mos7840_port->write_urb_pool[j] = urb; 859 860 if (urb == NULL) { 861 dev_err(&port->dev, "No more urbs???\n"); 862 continue; 863 } 864 865 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 866 GFP_KERNEL); 867 if (!urb->transfer_buffer) { 868 usb_free_urb(urb); 869 mos7840_port->write_urb_pool[j] = NULL; 870 dev_err(&port->dev, 871 "%s-out of memory for urb buffers.\n", 872 __func__); 873 continue; 874 } 875 } 876 877 /***************************************************************************** 878 * Initialize MCS7840 -- Write Init values to corresponding Registers 879 * 880 * Register Index 881 * 1 : IER 882 * 2 : FCR 883 * 3 : LCR 884 * 4 : MCR 885 * 886 * 0x08 : SP1/2 Control Reg 887 *****************************************************************************/ 888 889 /* NEED to check the following Block */ 890 891 Data = 0x0; 892 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 893 if (status < 0) { 894 dbg("Reading Spreg failed\n"); 895 return -1; 896 } 897 Data |= 0x80; 898 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 899 if (status < 0) { 900 dbg("writing Spreg failed\n"); 901 return -1; 902 } 903 904 Data &= ~0x80; 905 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 906 if (status < 0) { 907 dbg("writing Spreg failed\n"); 908 return -1; 909 } 910 /* End of block to be checked */ 911 912 Data = 0x0; 913 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 914 &Data); 915 if (status < 0) { 916 dbg("Reading Controlreg failed\n"); 917 return -1; 918 } 919 Data |= 0x08; /* Driver done bit */ 920 Data |= 0x20; /* rx_disable */ 921 status = mos7840_set_reg_sync(port, 922 mos7840_port->ControlRegOffset, Data); 923 if (status < 0) { 924 dbg("writing Controlreg failed\n"); 925 return -1; 926 } 927 /* do register settings here */ 928 /* Set all regs to the device default values. */ 929 /*********************************** 930 * First Disable all interrupts. 931 ***********************************/ 932 Data = 0x00; 933 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 934 if (status < 0) { 935 dbg("disableing interrupts failed\n"); 936 return -1; 937 } 938 /* Set FIFO_CONTROL_REGISTER to the default value */ 939 Data = 0x00; 940 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 941 if (status < 0) { 942 dbg("Writing FIFO_CONTROL_REGISTER failed\n"); 943 return -1; 944 } 945 946 Data = 0xcf; 947 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 948 if (status < 0) { 949 dbg("Writing FIFO_CONTROL_REGISTER failed\n"); 950 return -1; 951 } 952 953 Data = 0x03; 954 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 955 mos7840_port->shadowLCR = Data; 956 957 Data = 0x0b; 958 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 959 mos7840_port->shadowMCR = Data; 960 961 Data = 0x00; 962 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 963 mos7840_port->shadowLCR = Data; 964 965 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 966 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 967 968 Data = 0x0c; 969 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 970 971 Data = 0x0; 972 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 973 974 Data = 0x00; 975 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 976 977 Data = Data & ~SERIAL_LCR_DLAB; 978 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 979 mos7840_port->shadowLCR = Data; 980 981 /* clearing Bulkin and Bulkout Fifo */ 982 Data = 0x0; 983 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 984 985 Data = Data | 0x0c; 986 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 987 988 Data = Data & ~0x0c; 989 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 990 /* Finally enable all interrupts */ 991 Data = 0x0c; 992 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 993 994 /* clearing rx_disable */ 995 Data = 0x0; 996 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 997 &Data); 998 Data = Data & ~0x20; 999 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1000 Data); 1001 1002 /* rx_negate */ 1003 Data = 0x0; 1004 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1005 &Data); 1006 Data = Data | 0x10; 1007 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1008 Data); 1009 1010 /* Check to see if we've set up our endpoint info yet * 1011 * (can't set it up in mos7840_startup as the structures * 1012 * were not set up at that time.) */ 1013 if (port0->open_ports == 1) { 1014 if (serial->port[0]->interrupt_in_buffer == NULL) { 1015 /* set up interrupt urb */ 1016 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1017 serial->dev, 1018 usb_rcvintpipe(serial->dev, 1019 serial->port[0]->interrupt_in_endpointAddress), 1020 serial->port[0]->interrupt_in_buffer, 1021 serial->port[0]->interrupt_in_urb-> 1022 transfer_buffer_length, 1023 mos7840_interrupt_callback, 1024 serial, 1025 serial->port[0]->interrupt_in_urb->interval); 1026 1027 /* start interrupt read for mos7840 * 1028 * will continue as long as mos7840 is connected */ 1029 1030 response = 1031 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1032 GFP_KERNEL); 1033 if (response) { 1034 dev_err(&port->dev, "%s - Error %d submitting " 1035 "interrupt urb\n", __func__, response); 1036 } 1037 1038 } 1039 1040 } 1041 1042 /* see if we've set up our endpoint info yet * 1043 * (can't set it up in mos7840_startup as the * 1044 * structures were not set up at that time.) */ 1045 1046 dbg("port number is %d \n", port->number); 1047 dbg("serial number is %d \n", port->serial->minor); 1048 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress); 1049 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress); 1050 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress); 1051 dbg("port's number in the device is %d\n", mos7840_port->port_num); 1052 mos7840_port->read_urb = port->read_urb; 1053 1054 /* set up our bulk in urb */ 1055 1056 usb_fill_bulk_urb(mos7840_port->read_urb, 1057 serial->dev, 1058 usb_rcvbulkpipe(serial->dev, 1059 port->bulk_in_endpointAddress), 1060 port->bulk_in_buffer, 1061 mos7840_port->read_urb->transfer_buffer_length, 1062 mos7840_bulk_in_callback, mos7840_port); 1063 1064 dbg("mos7840_open: bulkin endpoint is %d\n", 1065 port->bulk_in_endpointAddress); 1066 mos7840_port->read_urb_busy = true; 1067 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1068 if (response) { 1069 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1070 __func__, response); 1071 mos7840_port->read_urb_busy = false; 1072 } 1073 1074 /* initialize our wait queues */ 1075 init_waitqueue_head(&mos7840_port->wait_chase); 1076 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1077 1078 /* initialize our icount structure */ 1079 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1080 1081 /* initialize our port settings */ 1082 /* Must set to enable ints! */ 1083 mos7840_port->shadowMCR = MCR_MASTER_IE; 1084 /* send a open port command */ 1085 mos7840_port->open = 1; 1086 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1087 mos7840_port->icount.tx = 0; 1088 mos7840_port->icount.rx = 0; 1089 1090 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", 1091 serial, mos7840_port, port); 1092 1093 return 0; 1094 1095 } 1096 1097 /***************************************************************************** 1098 * mos7840_chars_in_buffer 1099 * this function is called by the tty driver when it wants to know how many 1100 * bytes of data we currently have outstanding in the port (data that has 1101 * been written, but hasn't made it out the port yet) 1102 * If successful, we return the number of bytes left to be written in the 1103 * system, 1104 * Otherwise we return zero. 1105 *****************************************************************************/ 1106 1107 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1108 { 1109 struct usb_serial_port *port = tty->driver_data; 1110 int i; 1111 int chars = 0; 1112 unsigned long flags; 1113 struct moschip_port *mos7840_port; 1114 1115 dbg("%s \n", " mos7840_chars_in_buffer:entering ..........."); 1116 1117 if (mos7840_port_paranoia_check(port, __func__)) { 1118 dbg("%s", "Invalid port \n"); 1119 return 0; 1120 } 1121 1122 mos7840_port = mos7840_get_port_private(port); 1123 if (mos7840_port == NULL) { 1124 dbg("%s \n", "mos7840_break:leaving ..........."); 1125 return 0; 1126 } 1127 1128 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1129 for (i = 0; i < NUM_URBS; ++i) 1130 if (mos7840_port->busy[i]) 1131 chars += URB_TRANSFER_BUFFER_SIZE; 1132 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1133 dbg("%s - returns %d", __func__, chars); 1134 return chars; 1135 1136 } 1137 1138 /***************************************************************************** 1139 * mos7840_close 1140 * this function is called by the tty driver when a port is closed 1141 *****************************************************************************/ 1142 1143 static void mos7840_close(struct usb_serial_port *port) 1144 { 1145 struct usb_serial *serial; 1146 struct moschip_port *mos7840_port; 1147 struct moschip_port *port0; 1148 int j; 1149 __u16 Data; 1150 1151 dbg("%s\n", "mos7840_close:entering..."); 1152 1153 if (mos7840_port_paranoia_check(port, __func__)) { 1154 dbg("%s", "Port Paranoia failed \n"); 1155 return; 1156 } 1157 1158 serial = mos7840_get_usb_serial(port, __func__); 1159 if (!serial) { 1160 dbg("%s", "Serial Paranoia failed \n"); 1161 return; 1162 } 1163 1164 mos7840_port = mos7840_get_port_private(port); 1165 port0 = mos7840_get_port_private(serial->port[0]); 1166 1167 if (mos7840_port == NULL || port0 == NULL) 1168 return; 1169 1170 for (j = 0; j < NUM_URBS; ++j) 1171 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1172 1173 /* Freeing Write URBs */ 1174 for (j = 0; j < NUM_URBS; ++j) { 1175 if (mos7840_port->write_urb_pool[j]) { 1176 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1177 kfree(mos7840_port->write_urb_pool[j]-> 1178 transfer_buffer); 1179 1180 usb_free_urb(mos7840_port->write_urb_pool[j]); 1181 } 1182 } 1183 1184 /* While closing port, shutdown all bulk read, write * 1185 * and interrupt read if they exists */ 1186 if (serial->dev) { 1187 if (mos7840_port->write_urb) { 1188 dbg("%s", "Shutdown bulk write\n"); 1189 usb_kill_urb(mos7840_port->write_urb); 1190 } 1191 if (mos7840_port->read_urb) { 1192 dbg("%s", "Shutdown bulk read\n"); 1193 usb_kill_urb(mos7840_port->read_urb); 1194 mos7840_port->read_urb_busy = false; 1195 } 1196 if ((&mos7840_port->control_urb)) { 1197 dbg("%s", "Shutdown control read\n"); 1198 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1199 } 1200 } 1201 /* if(mos7840_port->ctrl_buf != NULL) */ 1202 /* kfree(mos7840_port->ctrl_buf); */ 1203 port0->open_ports--; 1204 dbg("mos7840_num_open_ports in close%d:in port%d\n", 1205 port0->open_ports, port->number); 1206 if (port0->open_ports == 0) { 1207 if (serial->port[0]->interrupt_in_urb) { 1208 dbg("%s", "Shutdown interrupt_in_urb\n"); 1209 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1210 } 1211 } 1212 1213 if (mos7840_port->write_urb) { 1214 /* if this urb had a transfer buffer already (old tx) free it */ 1215 if (mos7840_port->write_urb->transfer_buffer != NULL) 1216 kfree(mos7840_port->write_urb->transfer_buffer); 1217 usb_free_urb(mos7840_port->write_urb); 1218 } 1219 1220 Data = 0x0; 1221 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1222 1223 Data = 0x00; 1224 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1225 1226 mos7840_port->open = 0; 1227 1228 dbg("%s \n", "Leaving ............"); 1229 } 1230 1231 /************************************************************************ 1232 * 1233 * mos7840_block_until_chase_response 1234 * 1235 * This function will block the close until one of the following: 1236 * 1. Response to our Chase comes from mos7840 1237 * 2. A timeout of 10 seconds without activity has expired 1238 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1239 * 1240 ************************************************************************/ 1241 1242 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1243 struct moschip_port *mos7840_port) 1244 { 1245 int timeout = 1 * HZ; 1246 int wait = 10; 1247 int count; 1248 1249 while (1) { 1250 count = mos7840_chars_in_buffer(tty); 1251 1252 /* Check for Buffer status */ 1253 if (count <= 0) 1254 return; 1255 1256 /* Block the thread for a while */ 1257 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1258 timeout); 1259 /* No activity.. count down section */ 1260 wait--; 1261 if (wait == 0) { 1262 dbg("%s - TIMEOUT", __func__); 1263 return; 1264 } else { 1265 /* Reset timeout value back to seconds */ 1266 wait = 10; 1267 } 1268 } 1269 1270 } 1271 1272 /***************************************************************************** 1273 * mos7840_break 1274 * this function sends a break to the port 1275 *****************************************************************************/ 1276 static void mos7840_break(struct tty_struct *tty, int break_state) 1277 { 1278 struct usb_serial_port *port = tty->driver_data; 1279 unsigned char data; 1280 struct usb_serial *serial; 1281 struct moschip_port *mos7840_port; 1282 1283 dbg("%s \n", "Entering ..........."); 1284 dbg("mos7840_break: Start\n"); 1285 1286 if (mos7840_port_paranoia_check(port, __func__)) { 1287 dbg("%s", "Port Paranoia failed \n"); 1288 return; 1289 } 1290 1291 serial = mos7840_get_usb_serial(port, __func__); 1292 if (!serial) { 1293 dbg("%s", "Serial Paranoia failed \n"); 1294 return; 1295 } 1296 1297 mos7840_port = mos7840_get_port_private(port); 1298 1299 if (mos7840_port == NULL) 1300 return; 1301 1302 if (serial->dev) 1303 /* flush and block until tx is empty */ 1304 mos7840_block_until_chase_response(tty, mos7840_port); 1305 1306 if (break_state == -1) 1307 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1308 else 1309 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1310 1311 /* FIXME: no locking on shadowLCR anywhere in driver */ 1312 mos7840_port->shadowLCR = data; 1313 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n", 1314 mos7840_port->shadowLCR); 1315 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1316 mos7840_port->shadowLCR); 1317 1318 return; 1319 } 1320 1321 /***************************************************************************** 1322 * mos7840_write_room 1323 * this function is called by the tty driver when it wants to know how many 1324 * bytes of data we can accept for a specific port. 1325 * If successful, we return the amount of room that we have for this port 1326 * Otherwise we return a negative error number. 1327 *****************************************************************************/ 1328 1329 static int mos7840_write_room(struct tty_struct *tty) 1330 { 1331 struct usb_serial_port *port = tty->driver_data; 1332 int i; 1333 int room = 0; 1334 unsigned long flags; 1335 struct moschip_port *mos7840_port; 1336 1337 dbg("%s \n", " mos7840_write_room:entering ..........."); 1338 1339 if (mos7840_port_paranoia_check(port, __func__)) { 1340 dbg("%s", "Invalid port \n"); 1341 dbg("%s \n", " mos7840_write_room:leaving ..........."); 1342 return -1; 1343 } 1344 1345 mos7840_port = mos7840_get_port_private(port); 1346 if (mos7840_port == NULL) { 1347 dbg("%s \n", "mos7840_break:leaving ..........."); 1348 return -1; 1349 } 1350 1351 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1352 for (i = 0; i < NUM_URBS; ++i) { 1353 if (!mos7840_port->busy[i]) 1354 room += URB_TRANSFER_BUFFER_SIZE; 1355 } 1356 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1357 1358 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1359 dbg("%s - returns %d", __func__, room); 1360 return room; 1361 1362 } 1363 1364 /***************************************************************************** 1365 * mos7840_write 1366 * this function is called by the tty driver when data should be written to 1367 * the port. 1368 * If successful, we return the number of bytes written, otherwise we 1369 * return a negative error number. 1370 *****************************************************************************/ 1371 1372 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1373 const unsigned char *data, int count) 1374 { 1375 int status; 1376 int i; 1377 int bytes_sent = 0; 1378 int transfer_size; 1379 unsigned long flags; 1380 1381 struct moschip_port *mos7840_port; 1382 struct usb_serial *serial; 1383 struct urb *urb; 1384 /* __u16 Data; */ 1385 const unsigned char *current_position = data; 1386 unsigned char *data1; 1387 dbg("%s \n", "entering ..........."); 1388 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1389 mos7840_port->shadowLCR); */ 1390 1391 #ifdef NOTMOS7840 1392 Data = 0x00; 1393 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1394 mos7840_port->shadowLCR = Data; 1395 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data); 1396 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1397 mos7840_port->shadowLCR); 1398 1399 /* Data = 0x03; */ 1400 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1401 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1402 1403 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1404 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1405 1406 /* Data = 0x0c; */ 1407 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1408 Data = 0x00; 1409 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1410 dbg("mos7840_write:DLL value is %x\n", Data); 1411 1412 Data = 0x0; 1413 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1414 dbg("mos7840_write:DLM value is %x\n", Data); 1415 1416 Data = Data & ~SERIAL_LCR_DLAB; 1417 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", 1418 mos7840_port->shadowLCR); 1419 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1420 #endif 1421 1422 if (mos7840_port_paranoia_check(port, __func__)) { 1423 dbg("%s", "Port Paranoia failed \n"); 1424 return -1; 1425 } 1426 1427 serial = port->serial; 1428 if (mos7840_serial_paranoia_check(serial, __func__)) { 1429 dbg("%s", "Serial Paranoia failed \n"); 1430 return -1; 1431 } 1432 1433 mos7840_port = mos7840_get_port_private(port); 1434 if (mos7840_port == NULL) { 1435 dbg("%s", "mos7840_port is NULL\n"); 1436 return -1; 1437 } 1438 1439 /* try to find a free urb in the list */ 1440 urb = NULL; 1441 1442 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1443 for (i = 0; i < NUM_URBS; ++i) { 1444 if (!mos7840_port->busy[i]) { 1445 mos7840_port->busy[i] = 1; 1446 urb = mos7840_port->write_urb_pool[i]; 1447 dbg("\nURB:%d", i); 1448 break; 1449 } 1450 } 1451 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1452 1453 if (urb == NULL) { 1454 dbg("%s - no more free urbs", __func__); 1455 goto exit; 1456 } 1457 1458 if (urb->transfer_buffer == NULL) { 1459 urb->transfer_buffer = 1460 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1461 1462 if (urb->transfer_buffer == NULL) { 1463 dev_err(&port->dev, "%s no more kernel memory...\n", 1464 __func__); 1465 goto exit; 1466 } 1467 } 1468 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1469 1470 memcpy(urb->transfer_buffer, current_position, transfer_size); 1471 1472 /* fill urb with data and submit */ 1473 usb_fill_bulk_urb(urb, 1474 serial->dev, 1475 usb_sndbulkpipe(serial->dev, 1476 port->bulk_out_endpointAddress), 1477 urb->transfer_buffer, 1478 transfer_size, 1479 mos7840_bulk_out_data_callback, mos7840_port); 1480 1481 data1 = urb->transfer_buffer; 1482 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress); 1483 1484 /* send it down the pipe */ 1485 status = usb_submit_urb(urb, GFP_ATOMIC); 1486 1487 if (status) { 1488 mos7840_port->busy[i] = 0; 1489 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 1490 "with status = %d\n", __func__, status); 1491 bytes_sent = status; 1492 goto exit; 1493 } 1494 bytes_sent = transfer_size; 1495 mos7840_port->icount.tx += transfer_size; 1496 smp_wmb(); 1497 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); 1498 exit: 1499 return bytes_sent; 1500 1501 } 1502 1503 /***************************************************************************** 1504 * mos7840_throttle 1505 * this function is called by the tty driver when it wants to stop the data 1506 * being read from the port. 1507 *****************************************************************************/ 1508 1509 static void mos7840_throttle(struct tty_struct *tty) 1510 { 1511 struct usb_serial_port *port = tty->driver_data; 1512 struct moschip_port *mos7840_port; 1513 int status; 1514 1515 if (mos7840_port_paranoia_check(port, __func__)) { 1516 dbg("%s", "Invalid port \n"); 1517 return; 1518 } 1519 1520 dbg("- port %d\n", port->number); 1521 1522 mos7840_port = mos7840_get_port_private(port); 1523 1524 if (mos7840_port == NULL) 1525 return; 1526 1527 if (!mos7840_port->open) { 1528 dbg("%s\n", "port not opened"); 1529 return; 1530 } 1531 1532 dbg("%s", "Entering .......... \n"); 1533 1534 /* if we are implementing XON/XOFF, send the stop character */ 1535 if (I_IXOFF(tty)) { 1536 unsigned char stop_char = STOP_CHAR(tty); 1537 status = mos7840_write(tty, port, &stop_char, 1); 1538 if (status <= 0) 1539 return; 1540 } 1541 /* if we are implementing RTS/CTS, toggle that line */ 1542 if (tty->termios->c_cflag & CRTSCTS) { 1543 mos7840_port->shadowMCR &= ~MCR_RTS; 1544 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1545 mos7840_port->shadowMCR); 1546 if (status < 0) 1547 return; 1548 } 1549 1550 return; 1551 } 1552 1553 /***************************************************************************** 1554 * mos7840_unthrottle 1555 * this function is called by the tty driver when it wants to resume 1556 * the data being read from the port (called after mos7840_throttle is 1557 * called) 1558 *****************************************************************************/ 1559 static void mos7840_unthrottle(struct tty_struct *tty) 1560 { 1561 struct usb_serial_port *port = tty->driver_data; 1562 int status; 1563 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1564 1565 if (mos7840_port_paranoia_check(port, __func__)) { 1566 dbg("%s", "Invalid port \n"); 1567 return; 1568 } 1569 1570 if (mos7840_port == NULL) 1571 return; 1572 1573 if (!mos7840_port->open) { 1574 dbg("%s - port not opened", __func__); 1575 return; 1576 } 1577 1578 dbg("%s", "Entering .......... \n"); 1579 1580 /* if we are implementing XON/XOFF, send the start character */ 1581 if (I_IXOFF(tty)) { 1582 unsigned char start_char = START_CHAR(tty); 1583 status = mos7840_write(tty, port, &start_char, 1); 1584 if (status <= 0) 1585 return; 1586 } 1587 1588 /* if we are implementing RTS/CTS, toggle that line */ 1589 if (tty->termios->c_cflag & CRTSCTS) { 1590 mos7840_port->shadowMCR |= MCR_RTS; 1591 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1592 mos7840_port->shadowMCR); 1593 if (status < 0) 1594 return; 1595 } 1596 } 1597 1598 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) 1599 { 1600 struct usb_serial_port *port = tty->driver_data; 1601 struct moschip_port *mos7840_port; 1602 unsigned int result; 1603 __u16 msr; 1604 __u16 mcr; 1605 int status; 1606 mos7840_port = mos7840_get_port_private(port); 1607 1608 dbg("%s - port %d", __func__, port->number); 1609 1610 if (mos7840_port == NULL) 1611 return -ENODEV; 1612 1613 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1614 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1615 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1616 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1617 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1618 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1619 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1620 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1621 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1622 1623 dbg("%s - 0x%04X", __func__, result); 1624 1625 return result; 1626 } 1627 1628 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, 1629 unsigned int set, unsigned int clear) 1630 { 1631 struct usb_serial_port *port = tty->driver_data; 1632 struct moschip_port *mos7840_port; 1633 unsigned int mcr; 1634 int status; 1635 1636 dbg("%s - port %d", __func__, port->number); 1637 1638 mos7840_port = mos7840_get_port_private(port); 1639 1640 if (mos7840_port == NULL) 1641 return -ENODEV; 1642 1643 /* FIXME: What locks the port registers ? */ 1644 mcr = mos7840_port->shadowMCR; 1645 if (clear & TIOCM_RTS) 1646 mcr &= ~MCR_RTS; 1647 if (clear & TIOCM_DTR) 1648 mcr &= ~MCR_DTR; 1649 if (clear & TIOCM_LOOP) 1650 mcr &= ~MCR_LOOPBACK; 1651 1652 if (set & TIOCM_RTS) 1653 mcr |= MCR_RTS; 1654 if (set & TIOCM_DTR) 1655 mcr |= MCR_DTR; 1656 if (set & TIOCM_LOOP) 1657 mcr |= MCR_LOOPBACK; 1658 1659 mos7840_port->shadowMCR = mcr; 1660 1661 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1662 if (status < 0) { 1663 dbg("setting MODEM_CONTROL_REGISTER Failed\n"); 1664 return status; 1665 } 1666 1667 return 0; 1668 } 1669 1670 /***************************************************************************** 1671 * mos7840_calc_baud_rate_divisor 1672 * this function calculates the proper baud rate divisor for the specified 1673 * baud rate. 1674 *****************************************************************************/ 1675 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1676 __u16 *clk_sel_val) 1677 { 1678 1679 dbg("%s - %d", __func__, baudRate); 1680 1681 if (baudRate <= 115200) { 1682 *divisor = 115200 / baudRate; 1683 *clk_sel_val = 0x0; 1684 } 1685 if ((baudRate > 115200) && (baudRate <= 230400)) { 1686 *divisor = 230400 / baudRate; 1687 *clk_sel_val = 0x10; 1688 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1689 *divisor = 403200 / baudRate; 1690 *clk_sel_val = 0x20; 1691 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1692 *divisor = 460800 / baudRate; 1693 *clk_sel_val = 0x30; 1694 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1695 *divisor = 806400 / baudRate; 1696 *clk_sel_val = 0x40; 1697 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1698 *divisor = 921600 / baudRate; 1699 *clk_sel_val = 0x50; 1700 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1701 *divisor = 1572864 / baudRate; 1702 *clk_sel_val = 0x60; 1703 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1704 *divisor = 3145728 / baudRate; 1705 *clk_sel_val = 0x70; 1706 } 1707 return 0; 1708 1709 #ifdef NOTMCS7840 1710 1711 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1712 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1713 *divisor = mos7840_divisor_table[i].Divisor; 1714 return 0; 1715 } 1716 } 1717 1718 /* After trying for all the standard baud rates * 1719 * Try calculating the divisor for this baud rate */ 1720 1721 if (baudrate > 75 && baudrate < 230400) { 1722 /* get the divisor */ 1723 custom = (__u16) (230400L / baudrate); 1724 1725 /* Check for round off */ 1726 round1 = (__u16) (2304000L / baudrate); 1727 round = (__u16) (round1 - (custom * 10)); 1728 if (round > 4) 1729 custom++; 1730 *divisor = custom; 1731 1732 dbg(" Baud %d = %d\n", baudrate, custom); 1733 return 0; 1734 } 1735 1736 dbg("%s\n", " Baud calculation Failed..."); 1737 return -1; 1738 #endif 1739 } 1740 1741 /***************************************************************************** 1742 * mos7840_send_cmd_write_baud_rate 1743 * this function sends the proper command to change the baud rate of the 1744 * specified port. 1745 *****************************************************************************/ 1746 1747 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1748 int baudRate) 1749 { 1750 int divisor = 0; 1751 int status; 1752 __u16 Data; 1753 unsigned char number; 1754 __u16 clk_sel_val; 1755 struct usb_serial_port *port; 1756 1757 if (mos7840_port == NULL) 1758 return -1; 1759 1760 port = (struct usb_serial_port *)mos7840_port->port; 1761 if (mos7840_port_paranoia_check(port, __func__)) { 1762 dbg("%s", "Invalid port \n"); 1763 return -1; 1764 } 1765 1766 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1767 dbg("%s", "Invalid Serial \n"); 1768 return -1; 1769 } 1770 1771 dbg("%s", "Entering .......... \n"); 1772 1773 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1774 1775 dbg("%s - port = %d, baud = %d", __func__, 1776 mos7840_port->port->number, baudRate); 1777 /* reset clk_uart_sel in spregOffset */ 1778 if (baudRate > 115200) { 1779 #ifdef HW_flow_control 1780 /* NOTE: need to see the pther register to modify */ 1781 /* setting h/w flow control bit to 1 */ 1782 Data = 0x2b; 1783 mos7840_port->shadowMCR = Data; 1784 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1785 Data); 1786 if (status < 0) { 1787 dbg("Writing spreg failed in set_serial_baud\n"); 1788 return -1; 1789 } 1790 #endif 1791 1792 } else { 1793 #ifdef HW_flow_control 1794 / *setting h/w flow control bit to 0 */ 1795 Data = 0xb; 1796 mos7840_port->shadowMCR = Data; 1797 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1798 Data); 1799 if (status < 0) { 1800 dbg("Writing spreg failed in set_serial_baud\n"); 1801 return -1; 1802 } 1803 #endif 1804 1805 } 1806 1807 if (1) { /* baudRate <= 115200) */ 1808 clk_sel_val = 0x0; 1809 Data = 0x0; 1810 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1811 &clk_sel_val); 1812 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1813 &Data); 1814 if (status < 0) { 1815 dbg("reading spreg failed in set_serial_baud\n"); 1816 return -1; 1817 } 1818 Data = (Data & 0x8f) | clk_sel_val; 1819 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1820 Data); 1821 if (status < 0) { 1822 dbg("Writing spreg failed in set_serial_baud\n"); 1823 return -1; 1824 } 1825 /* Calculate the Divisor */ 1826 1827 if (status) { 1828 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1829 return status; 1830 } 1831 /* Enable access to divisor latch */ 1832 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1833 mos7840_port->shadowLCR = Data; 1834 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1835 1836 /* Write the divisor */ 1837 Data = (unsigned char)(divisor & 0xff); 1838 dbg("set_serial_baud Value to write DLL is %x\n", Data); 1839 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1840 1841 Data = (unsigned char)((divisor & 0xff00) >> 8); 1842 dbg("set_serial_baud Value to write DLM is %x\n", Data); 1843 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1844 1845 /* Disable access to divisor latch */ 1846 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1847 mos7840_port->shadowLCR = Data; 1848 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1849 1850 } 1851 return status; 1852 } 1853 1854 /***************************************************************************** 1855 * mos7840_change_port_settings 1856 * This routine is called to set the UART on the device to match 1857 * the specified new settings. 1858 *****************************************************************************/ 1859 1860 static void mos7840_change_port_settings(struct tty_struct *tty, 1861 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1862 { 1863 int baud; 1864 unsigned cflag; 1865 unsigned iflag; 1866 __u8 lData; 1867 __u8 lParity; 1868 __u8 lStop; 1869 int status; 1870 __u16 Data; 1871 struct usb_serial_port *port; 1872 struct usb_serial *serial; 1873 1874 if (mos7840_port == NULL) 1875 return; 1876 1877 port = (struct usb_serial_port *)mos7840_port->port; 1878 1879 if (mos7840_port_paranoia_check(port, __func__)) { 1880 dbg("%s", "Invalid port \n"); 1881 return; 1882 } 1883 1884 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1885 dbg("%s", "Invalid Serial \n"); 1886 return; 1887 } 1888 1889 serial = port->serial; 1890 1891 dbg("%s - port %d", __func__, mos7840_port->port->number); 1892 1893 if (!mos7840_port->open) { 1894 dbg("%s - port not opened", __func__); 1895 return; 1896 } 1897 1898 dbg("%s", "Entering .......... \n"); 1899 1900 lData = LCR_BITS_8; 1901 lStop = LCR_STOP_1; 1902 lParity = LCR_PAR_NONE; 1903 1904 cflag = tty->termios->c_cflag; 1905 iflag = tty->termios->c_iflag; 1906 1907 /* Change the number of bits */ 1908 if (cflag & CSIZE) { 1909 switch (cflag & CSIZE) { 1910 case CS5: 1911 lData = LCR_BITS_5; 1912 break; 1913 1914 case CS6: 1915 lData = LCR_BITS_6; 1916 break; 1917 1918 case CS7: 1919 lData = LCR_BITS_7; 1920 break; 1921 default: 1922 case CS8: 1923 lData = LCR_BITS_8; 1924 break; 1925 } 1926 } 1927 /* Change the Parity bit */ 1928 if (cflag & PARENB) { 1929 if (cflag & PARODD) { 1930 lParity = LCR_PAR_ODD; 1931 dbg("%s - parity = odd", __func__); 1932 } else { 1933 lParity = LCR_PAR_EVEN; 1934 dbg("%s - parity = even", __func__); 1935 } 1936 1937 } else { 1938 dbg("%s - parity = none", __func__); 1939 } 1940 1941 if (cflag & CMSPAR) 1942 lParity = lParity | 0x20; 1943 1944 /* Change the Stop bit */ 1945 if (cflag & CSTOPB) { 1946 lStop = LCR_STOP_2; 1947 dbg("%s - stop bits = 2", __func__); 1948 } else { 1949 lStop = LCR_STOP_1; 1950 dbg("%s - stop bits = 1", __func__); 1951 } 1952 1953 /* Update the LCR with the correct value */ 1954 mos7840_port->shadowLCR &= 1955 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1956 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1957 1958 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n", 1959 mos7840_port->shadowLCR); 1960 /* Disable Interrupts */ 1961 Data = 0x00; 1962 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1963 1964 Data = 0x00; 1965 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1966 1967 Data = 0xcf; 1968 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1969 1970 /* Send the updated LCR value to the mos7840 */ 1971 Data = mos7840_port->shadowLCR; 1972 1973 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1974 1975 Data = 0x00b; 1976 mos7840_port->shadowMCR = Data; 1977 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1978 Data = 0x00b; 1979 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1980 1981 /* set up the MCR register and send it to the mos7840 */ 1982 1983 mos7840_port->shadowMCR = MCR_MASTER_IE; 1984 if (cflag & CBAUD) 1985 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1986 1987 if (cflag & CRTSCTS) 1988 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1989 else 1990 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1991 1992 Data = mos7840_port->shadowMCR; 1993 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1994 1995 /* Determine divisor based on baud rate */ 1996 baud = tty_get_baud_rate(tty); 1997 1998 if (!baud) { 1999 /* pick a default, any default... */ 2000 dbg("%s\n", "Picked default baud..."); 2001 baud = 9600; 2002 } 2003 2004 dbg("%s - baud rate = %d", __func__, baud); 2005 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2006 2007 /* Enable Interrupts */ 2008 Data = 0x0c; 2009 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2010 2011 if (mos7840_port->read_urb_busy == false) { 2012 mos7840_port->read_urb->dev = serial->dev; 2013 mos7840_port->read_urb_busy = true; 2014 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2015 if (status) { 2016 dbg("usb_submit_urb(read bulk) failed, status = %d", 2017 status); 2018 mos7840_port->read_urb_busy = false; 2019 } 2020 } 2021 wake_up(&mos7840_port->delta_msr_wait); 2022 mos7840_port->delta_msr_cond = 1; 2023 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n", 2024 mos7840_port->shadowLCR); 2025 2026 return; 2027 } 2028 2029 /***************************************************************************** 2030 * mos7840_set_termios 2031 * this function is called by the tty driver when it wants to change 2032 * the termios structure 2033 *****************************************************************************/ 2034 2035 static void mos7840_set_termios(struct tty_struct *tty, 2036 struct usb_serial_port *port, 2037 struct ktermios *old_termios) 2038 { 2039 int status; 2040 unsigned int cflag; 2041 struct usb_serial *serial; 2042 struct moschip_port *mos7840_port; 2043 dbg("mos7840_set_termios: START\n"); 2044 if (mos7840_port_paranoia_check(port, __func__)) { 2045 dbg("%s", "Invalid port \n"); 2046 return; 2047 } 2048 2049 serial = port->serial; 2050 2051 if (mos7840_serial_paranoia_check(serial, __func__)) { 2052 dbg("%s", "Invalid Serial \n"); 2053 return; 2054 } 2055 2056 mos7840_port = mos7840_get_port_private(port); 2057 2058 if (mos7840_port == NULL) 2059 return; 2060 2061 if (!mos7840_port->open) { 2062 dbg("%s - port not opened", __func__); 2063 return; 2064 } 2065 2066 dbg("%s\n", "setting termios - "); 2067 2068 cflag = tty->termios->c_cflag; 2069 2070 dbg("%s - clfag %08x iflag %08x", __func__, 2071 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2072 dbg("%s - old clfag %08x old iflag %08x", __func__, 2073 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2074 dbg("%s - port %d", __func__, port->number); 2075 2076 /* change the port settings to the new ones specified */ 2077 2078 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2079 2080 if (!mos7840_port->read_urb) { 2081 dbg("%s", "URB KILLED !!!!!\n"); 2082 return; 2083 } 2084 2085 if (mos7840_port->read_urb_busy == false) { 2086 mos7840_port->read_urb->dev = serial->dev; 2087 mos7840_port->read_urb_busy = true; 2088 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2089 if (status) { 2090 dbg("usb_submit_urb(read bulk) failed, status = %d", 2091 status); 2092 mos7840_port->read_urb_busy = false; 2093 } 2094 } 2095 return; 2096 } 2097 2098 /***************************************************************************** 2099 * mos7840_get_lsr_info - get line status register info 2100 * 2101 * Purpose: Let user call ioctl() to get info when the UART physically 2102 * is emptied. On bus types like RS485, the transmitter must 2103 * release the bus after transmitting. This must be done when 2104 * the transmit shift register is empty, not be done when the 2105 * transmit holding register is empty. This functionality 2106 * allows an RS485 driver to be written in user space. 2107 *****************************************************************************/ 2108 2109 static int mos7840_get_lsr_info(struct tty_struct *tty, 2110 unsigned int __user *value) 2111 { 2112 int count; 2113 unsigned int result = 0; 2114 2115 count = mos7840_chars_in_buffer(tty); 2116 if (count == 0) { 2117 dbg("%s -- Empty", __func__); 2118 result = TIOCSER_TEMT; 2119 } 2120 2121 if (copy_to_user(value, &result, sizeof(int))) 2122 return -EFAULT; 2123 return 0; 2124 } 2125 2126 /***************************************************************************** 2127 * mos7840_set_modem_info 2128 * function to set modem info 2129 *****************************************************************************/ 2130 2131 /* FIXME: Should be using the model control hooks */ 2132 2133 static int mos7840_set_modem_info(struct moschip_port *mos7840_port, 2134 unsigned int cmd, unsigned int __user *value) 2135 { 2136 unsigned int mcr; 2137 unsigned int arg; 2138 __u16 Data; 2139 int status; 2140 struct usb_serial_port *port; 2141 2142 if (mos7840_port == NULL) 2143 return -1; 2144 2145 port = (struct usb_serial_port *)mos7840_port->port; 2146 if (mos7840_port_paranoia_check(port, __func__)) { 2147 dbg("%s", "Invalid port \n"); 2148 return -1; 2149 } 2150 2151 mcr = mos7840_port->shadowMCR; 2152 2153 if (copy_from_user(&arg, value, sizeof(int))) 2154 return -EFAULT; 2155 2156 switch (cmd) { 2157 case TIOCMBIS: 2158 if (arg & TIOCM_RTS) 2159 mcr |= MCR_RTS; 2160 if (arg & TIOCM_DTR) 2161 mcr |= MCR_RTS; 2162 if (arg & TIOCM_LOOP) 2163 mcr |= MCR_LOOPBACK; 2164 break; 2165 2166 case TIOCMBIC: 2167 if (arg & TIOCM_RTS) 2168 mcr &= ~MCR_RTS; 2169 if (arg & TIOCM_DTR) 2170 mcr &= ~MCR_RTS; 2171 if (arg & TIOCM_LOOP) 2172 mcr &= ~MCR_LOOPBACK; 2173 break; 2174 2175 case TIOCMSET: 2176 /* turn off the RTS and DTR and LOOPBACK 2177 * and then only turn on what was asked to */ 2178 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); 2179 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); 2180 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); 2181 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); 2182 break; 2183 } 2184 2185 lock_kernel(); 2186 mos7840_port->shadowMCR = mcr; 2187 2188 Data = mos7840_port->shadowMCR; 2189 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2190 unlock_kernel(); 2191 if (status < 0) { 2192 dbg("setting MODEM_CONTROL_REGISTER Failed\n"); 2193 return -1; 2194 } 2195 2196 return 0; 2197 } 2198 2199 /***************************************************************************** 2200 * mos7840_get_modem_info 2201 * function to get modem info 2202 *****************************************************************************/ 2203 2204 static int mos7840_get_modem_info(struct moschip_port *mos7840_port, 2205 unsigned int __user *value) 2206 { 2207 unsigned int result = 0; 2208 __u16 msr; 2209 unsigned int mcr = mos7840_port->shadowMCR; 2210 mos7840_get_uart_reg(mos7840_port->port, 2211 MODEM_STATUS_REGISTER, &msr); 2212 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ 2213 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ 2214 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ 2215 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ 2216 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ 2217 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ 2218 2219 dbg("%s -- %x", __func__, result); 2220 2221 if (copy_to_user(value, &result, sizeof(int))) 2222 return -EFAULT; 2223 return 0; 2224 } 2225 2226 /***************************************************************************** 2227 * mos7840_get_serial_info 2228 * function to get information about serial port 2229 *****************************************************************************/ 2230 2231 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2232 struct serial_struct __user *retinfo) 2233 { 2234 struct serial_struct tmp; 2235 2236 if (mos7840_port == NULL) 2237 return -1; 2238 2239 if (!retinfo) 2240 return -EFAULT; 2241 2242 memset(&tmp, 0, sizeof(tmp)); 2243 2244 tmp.type = PORT_16550A; 2245 tmp.line = mos7840_port->port->serial->minor; 2246 tmp.port = mos7840_port->port->number; 2247 tmp.irq = 0; 2248 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2249 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2250 tmp.baud_base = 9600; 2251 tmp.close_delay = 5 * HZ; 2252 tmp.closing_wait = 30 * HZ; 2253 2254 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2255 return -EFAULT; 2256 return 0; 2257 } 2258 2259 /***************************************************************************** 2260 * SerialIoctl 2261 * this function handles any ioctl calls to the driver 2262 *****************************************************************************/ 2263 2264 static int mos7840_ioctl(struct tty_struct *tty, struct file *file, 2265 unsigned int cmd, unsigned long arg) 2266 { 2267 struct usb_serial_port *port = tty->driver_data; 2268 void __user *argp = (void __user *)arg; 2269 struct moschip_port *mos7840_port; 2270 2271 struct async_icount cnow; 2272 struct async_icount cprev; 2273 struct serial_icounter_struct icount; 2274 int mosret = 0; 2275 2276 if (mos7840_port_paranoia_check(port, __func__)) { 2277 dbg("%s", "Invalid port \n"); 2278 return -1; 2279 } 2280 2281 mos7840_port = mos7840_get_port_private(port); 2282 2283 if (mos7840_port == NULL) 2284 return -1; 2285 2286 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2287 2288 switch (cmd) { 2289 /* return number of bytes available */ 2290 2291 case TIOCSERGETLSR: 2292 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2293 return mos7840_get_lsr_info(tty, argp); 2294 return 0; 2295 2296 /* FIXME: use the modem hooks and remove this */ 2297 case TIOCMBIS: 2298 case TIOCMBIC: 2299 case TIOCMSET: 2300 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__, 2301 port->number); 2302 mosret = 2303 mos7840_set_modem_info(mos7840_port, cmd, argp); 2304 return mosret; 2305 2306 case TIOCMGET: 2307 dbg("%s (%d) TIOCMGET", __func__, port->number); 2308 return mos7840_get_modem_info(mos7840_port, argp); 2309 2310 case TIOCGSERIAL: 2311 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2312 return mos7840_get_serial_info(mos7840_port, argp); 2313 2314 case TIOCSSERIAL: 2315 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2316 break; 2317 2318 case TIOCMIWAIT: 2319 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2320 cprev = mos7840_port->icount; 2321 while (1) { 2322 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2323 mos7840_port->delta_msr_cond = 0; 2324 wait_event_interruptible(mos7840_port->delta_msr_wait, 2325 (mos7840_port-> 2326 delta_msr_cond == 1)); 2327 2328 /* see if a signal did it */ 2329 if (signal_pending(current)) 2330 return -ERESTARTSYS; 2331 cnow = mos7840_port->icount; 2332 smp_rmb(); 2333 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2334 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2335 return -EIO; /* no change => error */ 2336 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2337 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2338 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2339 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2340 return 0; 2341 } 2342 cprev = cnow; 2343 } 2344 /* NOTREACHED */ 2345 break; 2346 2347 case TIOCGICOUNT: 2348 cnow = mos7840_port->icount; 2349 smp_rmb(); 2350 icount.cts = cnow.cts; 2351 icount.dsr = cnow.dsr; 2352 icount.rng = cnow.rng; 2353 icount.dcd = cnow.dcd; 2354 icount.rx = cnow.rx; 2355 icount.tx = cnow.tx; 2356 icount.frame = cnow.frame; 2357 icount.overrun = cnow.overrun; 2358 icount.parity = cnow.parity; 2359 icount.brk = cnow.brk; 2360 icount.buf_overrun = cnow.buf_overrun; 2361 2362 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2363 port->number, icount.rx, icount.tx); 2364 if (copy_to_user(argp, &icount, sizeof(icount))) 2365 return -EFAULT; 2366 return 0; 2367 default: 2368 break; 2369 } 2370 return -ENOIOCTLCMD; 2371 } 2372 2373 static int mos7840_calc_num_ports(struct usb_serial *serial) 2374 { 2375 int mos7840_num_ports = 0; 2376 2377 dbg("numberofendpoints: %d \n", 2378 (int)serial->interface->cur_altsetting->desc.bNumEndpoints); 2379 dbg("numberofendpoints: %d \n", 2380 (int)serial->interface->altsetting->desc.bNumEndpoints); 2381 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2382 mos7840_num_ports = serial->num_ports = 2; 2383 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2384 serial->num_bulk_in = 4; 2385 serial->num_bulk_out = 4; 2386 mos7840_num_ports = serial->num_ports = 4; 2387 } 2388 2389 return mos7840_num_ports; 2390 } 2391 2392 /**************************************************************************** 2393 * mos7840_startup 2394 ****************************************************************************/ 2395 2396 static int mos7840_startup(struct usb_serial *serial) 2397 { 2398 struct moschip_port *mos7840_port; 2399 struct usb_device *dev; 2400 int i, status; 2401 2402 __u16 Data; 2403 dbg("%s \n", " mos7840_startup :entering.........."); 2404 2405 if (!serial) { 2406 dbg("%s\n", "Invalid Handler"); 2407 return -1; 2408 } 2409 2410 dev = serial->dev; 2411 2412 dbg("%s\n", "Entering..."); 2413 2414 /* we set up the pointers to the endpoints in the mos7840_open * 2415 * function, as the structures aren't created yet. */ 2416 2417 /* set up port private structures */ 2418 for (i = 0; i < serial->num_ports; ++i) { 2419 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2420 if (mos7840_port == NULL) { 2421 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2422 status = -ENOMEM; 2423 i--; /* don't follow NULL pointer cleaning up */ 2424 goto error; 2425 } 2426 2427 /* Initialize all port interrupt end point to port 0 int 2428 * endpoint. Our device has only one interrupt end point 2429 * common to all port */ 2430 2431 mos7840_port->port = serial->port[i]; 2432 mos7840_set_port_private(serial->port[i], mos7840_port); 2433 spin_lock_init(&mos7840_port->pool_lock); 2434 2435 /* minor is not initialised until later by 2436 * usb-serial.c:get_free_serial() and cannot therefore be used 2437 * to index device instances */ 2438 mos7840_port->port_num = i + 1; 2439 dbg ("serial->port[i]->number = %d", serial->port[i]->number); 2440 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); 2441 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); 2442 dbg ("serial->minor = %d", serial->minor); 2443 2444 if (mos7840_port->port_num == 1) { 2445 mos7840_port->SpRegOffset = 0x0; 2446 mos7840_port->ControlRegOffset = 0x1; 2447 mos7840_port->DcrRegOffset = 0x4; 2448 } else if ((mos7840_port->port_num == 2) 2449 && (serial->num_ports == 4)) { 2450 mos7840_port->SpRegOffset = 0x8; 2451 mos7840_port->ControlRegOffset = 0x9; 2452 mos7840_port->DcrRegOffset = 0x16; 2453 } else if ((mos7840_port->port_num == 2) 2454 && (serial->num_ports == 2)) { 2455 mos7840_port->SpRegOffset = 0xa; 2456 mos7840_port->ControlRegOffset = 0xb; 2457 mos7840_port->DcrRegOffset = 0x19; 2458 } else if ((mos7840_port->port_num == 3) 2459 && (serial->num_ports == 4)) { 2460 mos7840_port->SpRegOffset = 0xa; 2461 mos7840_port->ControlRegOffset = 0xb; 2462 mos7840_port->DcrRegOffset = 0x19; 2463 } else if ((mos7840_port->port_num == 4) 2464 && (serial->num_ports == 4)) { 2465 mos7840_port->SpRegOffset = 0xc; 2466 mos7840_port->ControlRegOffset = 0xd; 2467 mos7840_port->DcrRegOffset = 0x1c; 2468 } 2469 mos7840_dump_serial_port(mos7840_port); 2470 mos7840_set_port_private(serial->port[i], mos7840_port); 2471 2472 /* enable rx_disable bit in control register */ 2473 status = mos7840_get_reg_sync(serial->port[i], 2474 mos7840_port->ControlRegOffset, &Data); 2475 if (status < 0) { 2476 dbg("Reading ControlReg failed status-0x%x\n", status); 2477 break; 2478 } else 2479 dbg("ControlReg Reading success val is %x, status%d\n", 2480 Data, status); 2481 Data |= 0x08; /* setting driver done bit */ 2482 Data |= 0x04; /* sp1_bit to have cts change reflect in 2483 modem status reg */ 2484 2485 /* Data |= 0x20; //rx_disable bit */ 2486 status = mos7840_set_reg_sync(serial->port[i], 2487 mos7840_port->ControlRegOffset, Data); 2488 if (status < 0) { 2489 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2490 break; 2491 } else 2492 dbg("ControlReg Writing success(rx_disable) status%d\n", 2493 status); 2494 2495 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2496 and 0x24 in DCR3 */ 2497 Data = 0x01; 2498 status = mos7840_set_reg_sync(serial->port[i], 2499 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2500 if (status < 0) { 2501 dbg("Writing DCR0 failed status-0x%x\n", status); 2502 break; 2503 } else 2504 dbg("DCR0 Writing success status%d\n", status); 2505 2506 Data = 0x05; 2507 status = mos7840_set_reg_sync(serial->port[i], 2508 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2509 if (status < 0) { 2510 dbg("Writing DCR1 failed status-0x%x\n", status); 2511 break; 2512 } else 2513 dbg("DCR1 Writing success status%d\n", status); 2514 2515 Data = 0x24; 2516 status = mos7840_set_reg_sync(serial->port[i], 2517 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2518 if (status < 0) { 2519 dbg("Writing DCR2 failed status-0x%x\n", status); 2520 break; 2521 } else 2522 dbg("DCR2 Writing success status%d\n", status); 2523 2524 /* write values in clkstart0x0 and clkmulti 0x20 */ 2525 Data = 0x0; 2526 status = mos7840_set_reg_sync(serial->port[i], 2527 CLK_START_VALUE_REGISTER, Data); 2528 if (status < 0) { 2529 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2530 break; 2531 } else 2532 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2533 2534 Data = 0x20; 2535 status = mos7840_set_reg_sync(serial->port[i], 2536 CLK_MULTI_REGISTER, Data); 2537 if (status < 0) { 2538 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n", 2539 status); 2540 goto error; 2541 } else 2542 dbg("CLK_MULTI_REGISTER Writing success status%d\n", 2543 status); 2544 2545 /* write value 0x0 to scratchpad register */ 2546 Data = 0x00; 2547 status = mos7840_set_uart_reg(serial->port[i], 2548 SCRATCH_PAD_REGISTER, Data); 2549 if (status < 0) { 2550 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", 2551 status); 2552 break; 2553 } else 2554 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n", 2555 status); 2556 2557 /* Zero Length flag register */ 2558 if ((mos7840_port->port_num != 1) 2559 && (serial->num_ports == 2)) { 2560 2561 Data = 0xff; 2562 status = mos7840_set_reg_sync(serial->port[i], 2563 (__u16) (ZLP_REG1 + 2564 ((__u16)mos7840_port->port_num)), Data); 2565 dbg("ZLIP offset%x\n", 2566 (__u16) (ZLP_REG1 + 2567 ((__u16) mos7840_port->port_num))); 2568 if (status < 0) { 2569 dbg("Writing ZLP_REG%d failed status-0x%x\n", 2570 i + 2, status); 2571 break; 2572 } else 2573 dbg("ZLP_REG%d Writing success status%d\n", 2574 i + 2, status); 2575 } else { 2576 Data = 0xff; 2577 status = mos7840_set_reg_sync(serial->port[i], 2578 (__u16) (ZLP_REG1 + 2579 ((__u16)mos7840_port->port_num) - 0x1), Data); 2580 dbg("ZLIP offset%x\n", 2581 (__u16) (ZLP_REG1 + 2582 ((__u16) mos7840_port->port_num) - 0x1)); 2583 if (status < 0) { 2584 dbg("Writing ZLP_REG%d failed status-0x%x\n", 2585 i + 1, status); 2586 break; 2587 } else 2588 dbg("ZLP_REG%d Writing success status%d\n", 2589 i + 1, status); 2590 2591 } 2592 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2593 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2594 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2595 GFP_KERNEL); 2596 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2597 !mos7840_port->dr) { 2598 status = -ENOMEM; 2599 goto error; 2600 } 2601 } 2602 2603 /* Zero Length flag enable */ 2604 Data = 0x0f; 2605 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2606 if (status < 0) { 2607 dbg("Writing ZLP_REG5 failed status-0x%x\n", status); 2608 goto error; 2609 } else 2610 dbg("ZLP_REG5 Writing success status%d\n", status); 2611 2612 /* setting configuration feature to one */ 2613 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2614 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2615 return 0; 2616 error: 2617 for (/* nothing */; i >= 0; i--) { 2618 mos7840_port = mos7840_get_port_private(serial->port[i]); 2619 2620 kfree(mos7840_port->dr); 2621 kfree(mos7840_port->ctrl_buf); 2622 usb_free_urb(mos7840_port->control_urb); 2623 kfree(mos7840_port); 2624 serial->port[i] = NULL; 2625 } 2626 return status; 2627 } 2628 2629 /**************************************************************************** 2630 * mos7840_shutdown 2631 * This function is called whenever the device is removed from the usb bus. 2632 ****************************************************************************/ 2633 2634 static void mos7840_shutdown(struct usb_serial *serial) 2635 { 2636 int i; 2637 unsigned long flags; 2638 struct moschip_port *mos7840_port; 2639 dbg("%s \n", " shutdown :entering.........."); 2640 2641 if (!serial) { 2642 dbg("%s", "Invalid Handler \n"); 2643 return; 2644 } 2645 2646 /* check for the ports to be closed,close the ports and disconnect */ 2647 2648 /* free private structure allocated for serial port * 2649 * stop reads and writes on all ports */ 2650 2651 for (i = 0; i < serial->num_ports; ++i) { 2652 mos7840_port = mos7840_get_port_private(serial->port[i]); 2653 dbg ("mos7840_port %d = %p", i, mos7840_port); 2654 if (mos7840_port) { 2655 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2656 mos7840_port->zombie = 1; 2657 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2658 usb_kill_urb(mos7840_port->control_urb); 2659 kfree(mos7840_port->ctrl_buf); 2660 kfree(mos7840_port->dr); 2661 kfree(mos7840_port); 2662 } 2663 mos7840_set_port_private(serial->port[i], NULL); 2664 } 2665 2666 dbg("%s\n", "Thank u :: "); 2667 2668 } 2669 2670 static struct usb_driver io_driver = { 2671 .name = "mos7840", 2672 .probe = usb_serial_probe, 2673 .disconnect = usb_serial_disconnect, 2674 .id_table = moschip_id_table_combined, 2675 .no_dynamic_id = 1, 2676 }; 2677 2678 static struct usb_serial_driver moschip7840_4port_device = { 2679 .driver = { 2680 .owner = THIS_MODULE, 2681 .name = "mos7840", 2682 }, 2683 .description = DRIVER_DESC, 2684 .usb_driver = &io_driver, 2685 .id_table = moschip_port_id_table, 2686 .num_ports = 4, 2687 .open = mos7840_open, 2688 .close = mos7840_close, 2689 .write = mos7840_write, 2690 .write_room = mos7840_write_room, 2691 .chars_in_buffer = mos7840_chars_in_buffer, 2692 .throttle = mos7840_throttle, 2693 .unthrottle = mos7840_unthrottle, 2694 .calc_num_ports = mos7840_calc_num_ports, 2695 #ifdef MCSSerialProbe 2696 .probe = mos7840_serial_probe, 2697 #endif 2698 .ioctl = mos7840_ioctl, 2699 .set_termios = mos7840_set_termios, 2700 .break_ctl = mos7840_break, 2701 .tiocmget = mos7840_tiocmget, 2702 .tiocmset = mos7840_tiocmset, 2703 .attach = mos7840_startup, 2704 .shutdown = mos7840_shutdown, 2705 .read_bulk_callback = mos7840_bulk_in_callback, 2706 .read_int_callback = mos7840_interrupt_callback, 2707 }; 2708 2709 /**************************************************************************** 2710 * moschip7840_init 2711 * This is called by the module subsystem, or on startup to initialize us 2712 ****************************************************************************/ 2713 static int __init moschip7840_init(void) 2714 { 2715 int retval; 2716 2717 dbg("%s \n", " mos7840_init :entering.........."); 2718 2719 /* Register with the usb serial */ 2720 retval = usb_serial_register(&moschip7840_4port_device); 2721 2722 if (retval) 2723 goto failed_port_device_register; 2724 2725 dbg("%s\n", "Entring..."); 2726 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2727 DRIVER_DESC "\n"); 2728 2729 /* Register with the usb */ 2730 retval = usb_register(&io_driver); 2731 if (retval == 0) { 2732 dbg("%s\n", "Leaving..."); 2733 return 0; 2734 } 2735 usb_serial_deregister(&moschip7840_4port_device); 2736 failed_port_device_register: 2737 return retval; 2738 } 2739 2740 /**************************************************************************** 2741 * moschip7840_exit 2742 * Called when the driver is about to be unloaded. 2743 ****************************************************************************/ 2744 static void __exit moschip7840_exit(void) 2745 { 2746 2747 dbg("%s \n", " mos7840_exit :entering.........."); 2748 2749 usb_deregister(&io_driver); 2750 2751 usb_serial_deregister(&moschip7840_4port_device); 2752 2753 dbg("%s\n", "Entring..."); 2754 } 2755 2756 module_init(moschip7840_init); 2757 module_exit(moschip7840_exit); 2758 2759 /* Module information */ 2760 MODULE_DESCRIPTION(DRIVER_DESC); 2761 MODULE_LICENSE("GPL"); 2762 2763 module_param(debug, bool, S_IRUGO | S_IWUSR); 2764 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2765