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_USO9ML2_2 0xAC22 124#define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 125#define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 126#define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 127#define BANDB_DEVICE_ID_US9ML2_2 0xAC29 128#define BANDB_DEVICE_ID_US9ML2_4 0xAC30 129#define BANDB_DEVICE_ID_USPTL4_2 0xAC31 130#define BANDB_DEVICE_ID_USPTL4_4 0xAC32 131#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 132#define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 133#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 134#define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 135#define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 136 137/* This driver also supports 138 * ATEN UC2324 device using Moschip MCS7840 139 * ATEN UC2322 device using Moschip MCS7820 140 */ 141#define USB_VENDOR_ID_ATENINTL 0x0557 142#define ATENINTL_DEVICE_ID_UC2324 0x2011 143#define ATENINTL_DEVICE_ID_UC2322 0x7820 144 145/* Interrupt Routine Defines */ 146 147#define SERIAL_IIR_RLS 0x06 148#define SERIAL_IIR_MS 0x00 149 150/* 151 * Emulation of the bit mask on the LINE STATUS REGISTER. 152 */ 153#define SERIAL_LSR_DR 0x0001 154#define SERIAL_LSR_OE 0x0002 155#define SERIAL_LSR_PE 0x0004 156#define SERIAL_LSR_FE 0x0008 157#define SERIAL_LSR_BI 0x0010 158 159#define MOS_MSR_DELTA_CTS 0x10 160#define MOS_MSR_DELTA_DSR 0x20 161#define MOS_MSR_DELTA_RI 0x40 162#define MOS_MSR_DELTA_CD 0x80 163 164/* Serial Port register Address */ 165#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 166#define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 167#define LINE_CONTROL_REGISTER ((__u16)(0x03)) 168#define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 169#define LINE_STATUS_REGISTER ((__u16)(0x05)) 170#define MODEM_STATUS_REGISTER ((__u16)(0x06)) 171#define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 172#define DIVISOR_LATCH_LSB ((__u16)(0x00)) 173#define DIVISOR_LATCH_MSB ((__u16)(0x01)) 174 175#define CLK_MULTI_REGISTER ((__u16)(0x02)) 176#define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 177 178#define SERIAL_LCR_DLAB ((__u16)(0x0080)) 179 180/* 181 * URB POOL related defines 182 */ 183#define NUM_URBS 16 /* URB Count */ 184#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 185 186 187static const struct usb_device_id moschip_port_id_table[] = { 188 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 190 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 203 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 204 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 205 {} /* terminating entry */ 206}; 207 208static const struct usb_device_id moschip_id_table_combined[] __devinitconst = { 209 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 210 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 211 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 212 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 213 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 214 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 215 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 216 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 217 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 218 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 219 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 220 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 221 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 222 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 223 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 224 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 225 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 226 {} /* terminating entry */ 227}; 228 229MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); 230 231/* This structure holds all of the local port information */ 232 233struct moschip_port { 234 int port_num; /*Actual port number in the device(1,2,etc) */ 235 struct urb *write_urb; /* write URB for this port */ 236 struct urb *read_urb; /* read URB for this port */ 237 struct urb *int_urb; 238 __u8 shadowLCR; /* last LCR value received */ 239 __u8 shadowMCR; /* last MCR value received */ 240 char open; 241 char open_ports; 242 char zombie; 243 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 244 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 245 int delta_msr_cond; 246 struct async_icount icount; 247 struct usb_serial_port *port; /* loop back to the owner of this object */ 248 249 /* Offsets */ 250 __u8 SpRegOffset; 251 __u8 ControlRegOffset; 252 __u8 DcrRegOffset; 253 /* for processing control URBS in interrupt context */ 254 struct urb *control_urb; 255 struct usb_ctrlrequest *dr; 256 char *ctrl_buf; 257 int MsrLsr; 258 259 spinlock_t pool_lock; 260 struct urb *write_urb_pool[NUM_URBS]; 261 char busy[NUM_URBS]; 262 bool read_urb_busy; 263}; 264 265 266static int debug; 267 268/* 269 * mos7840_set_reg_sync 270 * To set the Control register by calling usb_fill_control_urb function 271 * by passing usb_sndctrlpipe function as parameter. 272 */ 273 274static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 275 __u16 val) 276{ 277 struct usb_device *dev = port->serial->dev; 278 val = val & 0x00ff; 279 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val); 280 281 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 282 MCS_WR_RTYPE, val, reg, NULL, 0, 283 MOS_WDR_TIMEOUT); 284} 285 286/* 287 * mos7840_get_reg_sync 288 * To set the Uart register by calling usb_fill_control_urb function by 289 * passing usb_rcvctrlpipe function as parameter. 290 */ 291 292static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 293 __u16 *val) 294{ 295 struct usb_device *dev = port->serial->dev; 296 int ret = 0; 297 u8 *buf; 298 299 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 300 if (!buf) 301 return -ENOMEM; 302 303 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 304 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 305 MOS_WDR_TIMEOUT); 306 *val = buf[0]; 307 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); 308 309 kfree(buf); 310 return ret; 311} 312 313/* 314 * mos7840_set_uart_reg 315 * To set the Uart register by calling usb_fill_control_urb function by 316 * passing usb_sndctrlpipe function as parameter. 317 */ 318 319static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 320 __u16 val) 321{ 322 323 struct usb_device *dev = port->serial->dev; 324 val = val & 0x00ff; 325 /* For the UART control registers, the application number need 326 to be Or'ed */ 327 if (port->serial->num_ports == 4) { 328 val |= (((__u16) port->number - 329 (__u16) (port->serial->minor)) + 1) << 8; 330 dbg("mos7840_set_uart_reg application number is %x", val); 331 } else { 332 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 333 val |= (((__u16) port->number - 334 (__u16) (port->serial->minor)) + 1) << 8; 335 dbg("mos7840_set_uart_reg application number is %x", 336 val); 337 } else { 338 val |= 339 (((__u16) port->number - 340 (__u16) (port->serial->minor)) + 2) << 8; 341 dbg("mos7840_set_uart_reg application number is %x", 342 val); 343 } 344 } 345 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 346 MCS_WR_RTYPE, val, reg, NULL, 0, 347 MOS_WDR_TIMEOUT); 348 349} 350 351/* 352 * mos7840_get_uart_reg 353 * To set the Control register by calling usb_fill_control_urb function 354 * by passing usb_rcvctrlpipe function as parameter. 355 */ 356static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 357 __u16 *val) 358{ 359 struct usb_device *dev = port->serial->dev; 360 int ret = 0; 361 __u16 Wval; 362 u8 *buf; 363 364 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 365 if (!buf) 366 return -ENOMEM; 367 368 /* dbg("application number is %4x", 369 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ 370 /* Wval is same as application number */ 371 if (port->serial->num_ports == 4) { 372 Wval = 373 (((__u16) port->number - (__u16) (port->serial->minor)) + 374 1) << 8; 375 dbg("mos7840_get_uart_reg application number is %x", Wval); 376 } else { 377 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 378 Wval = (((__u16) port->number - 379 (__u16) (port->serial->minor)) + 1) << 8; 380 dbg("mos7840_get_uart_reg application number is %x", 381 Wval); 382 } else { 383 Wval = (((__u16) port->number - 384 (__u16) (port->serial->minor)) + 2) << 8; 385 dbg("mos7840_get_uart_reg application number is %x", 386 Wval); 387 } 388 } 389 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 390 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 391 MOS_WDR_TIMEOUT); 392 *val = buf[0]; 393 394 kfree(buf); 395 return ret; 396} 397 398static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 399{ 400 401 dbg("***************************************"); 402 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset); 403 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset); 404 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset); 405 dbg("***************************************"); 406 407} 408 409/************************************************************************/ 410/************************************************************************/ 411/* I N T E R F A C E F U N C T I O N S */ 412/* I N T E R F A C E F U N C T I O N S */ 413/************************************************************************/ 414/************************************************************************/ 415 416static inline void mos7840_set_port_private(struct usb_serial_port *port, 417 struct moschip_port *data) 418{ 419 usb_set_serial_port_data(port, (void *)data); 420} 421 422static inline struct moschip_port *mos7840_get_port_private(struct 423 usb_serial_port 424 *port) 425{ 426 return (struct moschip_port *)usb_get_serial_port_data(port); 427} 428 429static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 430{ 431 struct moschip_port *mos7840_port; 432 struct async_icount *icount; 433 mos7840_port = port; 434 icount = &mos7840_port->icount; 435 if (new_msr & 436 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 437 MOS_MSR_DELTA_CD)) { 438 icount = &mos7840_port->icount; 439 440 /* update input line counters */ 441 if (new_msr & MOS_MSR_DELTA_CTS) { 442 icount->cts++; 443 smp_wmb(); 444 } 445 if (new_msr & MOS_MSR_DELTA_DSR) { 446 icount->dsr++; 447 smp_wmb(); 448 } 449 if (new_msr & MOS_MSR_DELTA_CD) { 450 icount->dcd++; 451 smp_wmb(); 452 } 453 if (new_msr & MOS_MSR_DELTA_RI) { 454 icount->rng++; 455 smp_wmb(); 456 } 457 } 458} 459 460static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 461{ 462 struct async_icount *icount; 463 464 dbg("%s - %02x", __func__, new_lsr); 465 466 if (new_lsr & SERIAL_LSR_BI) { 467 /* 468 * Parity and Framing errors only count if they 469 * occur exclusive of a break being 470 * received. 471 */ 472 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 473 } 474 475 /* update input line counters */ 476 icount = &port->icount; 477 if (new_lsr & SERIAL_LSR_BI) { 478 icount->brk++; 479 smp_wmb(); 480 } 481 if (new_lsr & SERIAL_LSR_OE) { 482 icount->overrun++; 483 smp_wmb(); 484 } 485 if (new_lsr & SERIAL_LSR_PE) { 486 icount->parity++; 487 smp_wmb(); 488 } 489 if (new_lsr & SERIAL_LSR_FE) { 490 icount->frame++; 491 smp_wmb(); 492 } 493} 494 495/************************************************************************/ 496/************************************************************************/ 497/* U S B C A L L B A C K F U N C T I O N S */ 498/* U S B C A L L B A C K F U N C T I O N S */ 499/************************************************************************/ 500/************************************************************************/ 501 502static void mos7840_control_callback(struct urb *urb) 503{ 504 unsigned char *data; 505 struct moschip_port *mos7840_port; 506 __u8 regval = 0x0; 507 int result = 0; 508 int status = urb->status; 509 510 mos7840_port = urb->context; 511 512 switch (status) { 513 case 0: 514 /* success */ 515 break; 516 case -ECONNRESET: 517 case -ENOENT: 518 case -ESHUTDOWN: 519 /* this urb is terminated, clean up */ 520 dbg("%s - urb shutting down with status: %d", __func__, 521 status); 522 return; 523 default: 524 dbg("%s - nonzero urb status received: %d", __func__, 525 status); 526 goto exit; 527 } 528 529 dbg("%s urb buffer size is %d", __func__, urb->actual_length); 530 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__, 531 mos7840_port->MsrLsr, mos7840_port->port_num); 532 data = urb->transfer_buffer; 533 regval = (__u8) data[0]; 534 dbg("%s data is %x", __func__, regval); 535 if (mos7840_port->MsrLsr == 0) 536 mos7840_handle_new_msr(mos7840_port, regval); 537 else if (mos7840_port->MsrLsr == 1) 538 mos7840_handle_new_lsr(mos7840_port, regval); 539 540exit: 541 spin_lock(&mos7840_port->pool_lock); 542 if (!mos7840_port->zombie) 543 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 544 spin_unlock(&mos7840_port->pool_lock); 545 if (result) { 546 dev_err(&urb->dev->dev, 547 "%s - Error %d submitting interrupt urb\n", 548 __func__, result); 549 } 550} 551 552static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 553 __u16 *val) 554{ 555 struct usb_device *dev = mcs->port->serial->dev; 556 struct usb_ctrlrequest *dr = mcs->dr; 557 unsigned char *buffer = mcs->ctrl_buf; 558 int ret; 559 560 dr->bRequestType = MCS_RD_RTYPE; 561 dr->bRequest = MCS_RDREQ; 562 dr->wValue = cpu_to_le16(Wval); /* 0 */ 563 dr->wIndex = cpu_to_le16(reg); 564 dr->wLength = cpu_to_le16(2); 565 566 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 567 (unsigned char *)dr, buffer, 2, 568 mos7840_control_callback, mcs); 569 mcs->control_urb->transfer_buffer_length = 2; 570 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 571 return ret; 572} 573 574/***************************************************************************** 575 * mos7840_interrupt_callback 576 * this is the callback function for when we have received data on the 577 * interrupt endpoint. 578 *****************************************************************************/ 579 580static void mos7840_interrupt_callback(struct urb *urb) 581{ 582 int result; 583 int length; 584 struct moschip_port *mos7840_port; 585 struct usb_serial *serial; 586 __u16 Data; 587 unsigned char *data; 588 __u8 sp[5], st; 589 int i, rv = 0; 590 __u16 wval, wreg = 0; 591 int status = urb->status; 592 593 dbg("%s", " : Entering"); 594 595 switch (status) { 596 case 0: 597 /* success */ 598 break; 599 case -ECONNRESET: 600 case -ENOENT: 601 case -ESHUTDOWN: 602 /* this urb is terminated, clean up */ 603 dbg("%s - urb shutting down with status: %d", __func__, 604 status); 605 return; 606 default: 607 dbg("%s - nonzero urb status received: %d", __func__, 608 status); 609 goto exit; 610 } 611 612 length = urb->actual_length; 613 data = urb->transfer_buffer; 614 615 serial = urb->context; 616 617 /* Moschip get 5 bytes 618 * Byte 1 IIR Port 1 (port.number is 0) 619 * Byte 2 IIR Port 2 (port.number is 1) 620 * Byte 3 IIR Port 3 (port.number is 2) 621 * Byte 4 IIR Port 4 (port.number is 3) 622 * Byte 5 FIFO status for both */ 623 624 if (length && length > 5) { 625 dbg("%s", "Wrong data !!!"); 626 return; 627 } 628 629 sp[0] = (__u8) data[0]; 630 sp[1] = (__u8) data[1]; 631 sp[2] = (__u8) data[2]; 632 sp[3] = (__u8) data[3]; 633 st = (__u8) data[4]; 634 635 for (i = 0; i < serial->num_ports; i++) { 636 mos7840_port = mos7840_get_port_private(serial->port[i]); 637 wval = 638 (((__u16) serial->port[i]->number - 639 (__u16) (serial->minor)) + 1) << 8; 640 if (mos7840_port->open) { 641 if (sp[i] & 0x01) { 642 dbg("SP%d No Interrupt !!!", i); 643 } else { 644 switch (sp[i] & 0x0f) { 645 case SERIAL_IIR_RLS: 646 dbg("Serial Port %d: Receiver status error or ", i); 647 dbg("address bit detected in 9-bit mode"); 648 mos7840_port->MsrLsr = 1; 649 wreg = LINE_STATUS_REGISTER; 650 break; 651 case SERIAL_IIR_MS: 652 dbg("Serial Port %d: Modem status change", i); 653 mos7840_port->MsrLsr = 0; 654 wreg = MODEM_STATUS_REGISTER; 655 break; 656 } 657 spin_lock(&mos7840_port->pool_lock); 658 if (!mos7840_port->zombie) { 659 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 660 } else { 661 spin_unlock(&mos7840_port->pool_lock); 662 return; 663 } 664 spin_unlock(&mos7840_port->pool_lock); 665 } 666 } 667 } 668 if (!(rv < 0)) 669 /* the completion handler for the control urb will resubmit */ 670 return; 671exit: 672 result = usb_submit_urb(urb, GFP_ATOMIC); 673 if (result) { 674 dev_err(&urb->dev->dev, 675 "%s - Error %d submitting interrupt urb\n", 676 __func__, result); 677 } 678} 679 680static int mos7840_port_paranoia_check(struct usb_serial_port *port, 681 const char *function) 682{ 683 if (!port) { 684 dbg("%s - port == NULL", function); 685 return -1; 686 } 687 if (!port->serial) { 688 dbg("%s - port->serial == NULL", function); 689 return -1; 690 } 691 692 return 0; 693} 694 695/* Inline functions to check the sanity of a pointer that is passed to us */ 696static int mos7840_serial_paranoia_check(struct usb_serial *serial, 697 const char *function) 698{ 699 if (!serial) { 700 dbg("%s - serial == NULL", function); 701 return -1; 702 } 703 if (!serial->type) { 704 dbg("%s - serial->type == NULL!", function); 705 return -1; 706 } 707 708 return 0; 709} 710 711static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 712 const char *function) 713{ 714 /* if no port was specified, or it fails a paranoia check */ 715 if (!port || 716 mos7840_port_paranoia_check(port, function) || 717 mos7840_serial_paranoia_check(port->serial, function)) { 718 /* then say that we don't have a valid usb_serial thing, 719 * which will end up genrating -ENODEV return values */ 720 return NULL; 721 } 722 723 return port->serial; 724} 725 726/***************************************************************************** 727 * mos7840_bulk_in_callback 728 * this is the callback function for when we have received data on the 729 * bulk in endpoint. 730 *****************************************************************************/ 731 732static void mos7840_bulk_in_callback(struct urb *urb) 733{ 734 int retval; 735 unsigned char *data; 736 struct usb_serial *serial; 737 struct usb_serial_port *port; 738 struct moschip_port *mos7840_port; 739 struct tty_struct *tty; 740 int status = urb->status; 741 742 mos7840_port = urb->context; 743 if (!mos7840_port) { 744 dbg("%s", "NULL mos7840_port pointer"); 745 return; 746 } 747 748 if (status) { 749 dbg("nonzero read bulk status received: %d", status); 750 mos7840_port->read_urb_busy = false; 751 return; 752 } 753 754 port = (struct usb_serial_port *)mos7840_port->port; 755 if (mos7840_port_paranoia_check(port, __func__)) { 756 dbg("%s", "Port Paranoia failed"); 757 mos7840_port->read_urb_busy = false; 758 return; 759 } 760 761 serial = mos7840_get_usb_serial(port, __func__); 762 if (!serial) { 763 dbg("%s", "Bad serial pointer"); 764 mos7840_port->read_urb_busy = false; 765 return; 766 } 767 768 dbg("%s", "Entering... "); 769 770 data = urb->transfer_buffer; 771 772 dbg("%s", "Entering ..........."); 773 774 if (urb->actual_length) { 775 tty = tty_port_tty_get(&mos7840_port->port->port); 776 if (tty) { 777 tty_insert_flip_string(tty, data, urb->actual_length); 778 dbg(" %s ", data); 779 tty_flip_buffer_push(tty); 780 tty_kref_put(tty); 781 } 782 mos7840_port->icount.rx += urb->actual_length; 783 smp_wmb(); 784 dbg("mos7840_port->icount.rx is %d:", 785 mos7840_port->icount.rx); 786 } 787 788 if (!mos7840_port->read_urb) { 789 dbg("%s", "URB KILLED !!!"); 790 mos7840_port->read_urb_busy = false; 791 return; 792 } 793 794 795 mos7840_port->read_urb->dev = serial->dev; 796 797 mos7840_port->read_urb_busy = true; 798 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 799 800 if (retval) { 801 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); 802 mos7840_port->read_urb_busy = false; 803 } 804} 805 806/***************************************************************************** 807 * mos7840_bulk_out_data_callback 808 * this is the callback function for when we have finished sending 809 * serial data on the bulk out endpoint. 810 *****************************************************************************/ 811 812static void mos7840_bulk_out_data_callback(struct urb *urb) 813{ 814 struct moschip_port *mos7840_port; 815 struct tty_struct *tty; 816 int status = urb->status; 817 int i; 818 819 mos7840_port = urb->context; 820 spin_lock(&mos7840_port->pool_lock); 821 for (i = 0; i < NUM_URBS; i++) { 822 if (urb == mos7840_port->write_urb_pool[i]) { 823 mos7840_port->busy[i] = 0; 824 break; 825 } 826 } 827 spin_unlock(&mos7840_port->pool_lock); 828 829 if (status) { 830 dbg("nonzero write bulk status received:%d", status); 831 return; 832 } 833 834 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { 835 dbg("%s", "Port Paranoia failed"); 836 return; 837 } 838 839 dbg("%s", "Entering ........."); 840 841 tty = tty_port_tty_get(&mos7840_port->port->port); 842 if (tty && mos7840_port->open) 843 tty_wakeup(tty); 844 tty_kref_put(tty); 845 846} 847 848/************************************************************************/ 849/* 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 */ 850/************************************************************************/ 851#ifdef MCSSerialProbe 852static int mos7840_serial_probe(struct usb_serial *serial, 853 const struct usb_device_id *id) 854{ 855 856 /*need to implement the mode_reg reading and updating\ 857 structures usb_serial_ device_type\ 858 (i.e num_ports, num_bulkin,bulkout etc) */ 859 /* Also we can update the changes attach */ 860 return 1; 861} 862#endif 863 864/***************************************************************************** 865 * mos7840_open 866 * this function is called by the tty driver when a port is opened 867 * If successful, we return 0 868 * Otherwise we return a negative error number. 869 *****************************************************************************/ 870 871static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 872{ 873 int response; 874 int j; 875 struct usb_serial *serial; 876 struct urb *urb; 877 __u16 Data; 878 int status; 879 struct moschip_port *mos7840_port; 880 struct moschip_port *port0; 881 882 dbg ("%s enter", __func__); 883 884 if (mos7840_port_paranoia_check(port, __func__)) { 885 dbg("%s", "Port Paranoia failed"); 886 return -ENODEV; 887 } 888 889 serial = port->serial; 890 891 if (mos7840_serial_paranoia_check(serial, __func__)) { 892 dbg("%s", "Serial Paranoia failed"); 893 return -ENODEV; 894 } 895 896 mos7840_port = mos7840_get_port_private(port); 897 port0 = mos7840_get_port_private(serial->port[0]); 898 899 if (mos7840_port == NULL || port0 == NULL) 900 return -ENODEV; 901 902 usb_clear_halt(serial->dev, port->write_urb->pipe); 903 usb_clear_halt(serial->dev, port->read_urb->pipe); 904 port0->open_ports++; 905 906 /* Initialising the write urb pool */ 907 for (j = 0; j < NUM_URBS; ++j) { 908 urb = usb_alloc_urb(0, GFP_KERNEL); 909 mos7840_port->write_urb_pool[j] = urb; 910 911 if (urb == NULL) { 912 dev_err(&port->dev, "No more urbs???\n"); 913 continue; 914 } 915 916 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 917 GFP_KERNEL); 918 if (!urb->transfer_buffer) { 919 usb_free_urb(urb); 920 mos7840_port->write_urb_pool[j] = NULL; 921 dev_err(&port->dev, 922 "%s-out of memory for urb buffers.\n", 923 __func__); 924 continue; 925 } 926 } 927 928/***************************************************************************** 929 * Initialize MCS7840 -- Write Init values to corresponding Registers 930 * 931 * Register Index 932 * 1 : IER 933 * 2 : FCR 934 * 3 : LCR 935 * 4 : MCR 936 * 937 * 0x08 : SP1/2 Control Reg 938 *****************************************************************************/ 939 940 /* NEED to check the following Block */ 941 942 Data = 0x0; 943 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 944 if (status < 0) { 945 dbg("Reading Spreg failed"); 946 return -1; 947 } 948 Data |= 0x80; 949 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 950 if (status < 0) { 951 dbg("writing Spreg failed"); 952 return -1; 953 } 954 955 Data &= ~0x80; 956 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 957 if (status < 0) { 958 dbg("writing Spreg failed"); 959 return -1; 960 } 961 /* End of block to be checked */ 962 963 Data = 0x0; 964 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 965 &Data); 966 if (status < 0) { 967 dbg("Reading Controlreg failed"); 968 return -1; 969 } 970 Data |= 0x08; /* Driver done bit */ 971 Data |= 0x20; /* rx_disable */ 972 status = mos7840_set_reg_sync(port, 973 mos7840_port->ControlRegOffset, Data); 974 if (status < 0) { 975 dbg("writing Controlreg failed"); 976 return -1; 977 } 978 /* do register settings here */ 979 /* Set all regs to the device default values. */ 980 /*********************************** 981 * First Disable all interrupts. 982 ***********************************/ 983 Data = 0x00; 984 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 985 if (status < 0) { 986 dbg("disabling interrupts failed"); 987 return -1; 988 } 989 /* Set FIFO_CONTROL_REGISTER to the default value */ 990 Data = 0x00; 991 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 992 if (status < 0) { 993 dbg("Writing FIFO_CONTROL_REGISTER failed"); 994 return -1; 995 } 996 997 Data = 0xcf; 998 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 999 if (status < 0) { 1000 dbg("Writing FIFO_CONTROL_REGISTER failed"); 1001 return -1; 1002 } 1003 1004 Data = 0x03; 1005 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1006 mos7840_port->shadowLCR = Data; 1007 1008 Data = 0x0b; 1009 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1010 mos7840_port->shadowMCR = Data; 1011 1012 Data = 0x00; 1013 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1014 mos7840_port->shadowLCR = Data; 1015 1016 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1017 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1018 1019 Data = 0x0c; 1020 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1021 1022 Data = 0x0; 1023 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1024 1025 Data = 0x00; 1026 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1027 1028 Data = Data & ~SERIAL_LCR_DLAB; 1029 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1030 mos7840_port->shadowLCR = Data; 1031 1032 /* clearing Bulkin and Bulkout Fifo */ 1033 Data = 0x0; 1034 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1035 1036 Data = Data | 0x0c; 1037 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1038 1039 Data = Data & ~0x0c; 1040 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1041 /* Finally enable all interrupts */ 1042 Data = 0x0c; 1043 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1044 1045 /* clearing rx_disable */ 1046 Data = 0x0; 1047 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1048 &Data); 1049 Data = Data & ~0x20; 1050 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1051 Data); 1052 1053 /* rx_negate */ 1054 Data = 0x0; 1055 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1056 &Data); 1057 Data = Data | 0x10; 1058 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1059 Data); 1060 1061 /* Check to see if we've set up our endpoint info yet * 1062 * (can't set it up in mos7840_startup as the structures * 1063 * were not set up at that time.) */ 1064 if (port0->open_ports == 1) { 1065 if (serial->port[0]->interrupt_in_buffer == NULL) { 1066 /* set up interrupt urb */ 1067 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1068 serial->dev, 1069 usb_rcvintpipe(serial->dev, 1070 serial->port[0]->interrupt_in_endpointAddress), 1071 serial->port[0]->interrupt_in_buffer, 1072 serial->port[0]->interrupt_in_urb-> 1073 transfer_buffer_length, 1074 mos7840_interrupt_callback, 1075 serial, 1076 serial->port[0]->interrupt_in_urb->interval); 1077 1078 /* start interrupt read for mos7840 * 1079 * will continue as long as mos7840 is connected */ 1080 1081 response = 1082 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1083 GFP_KERNEL); 1084 if (response) { 1085 dev_err(&port->dev, "%s - Error %d submitting " 1086 "interrupt urb\n", __func__, response); 1087 } 1088 1089 } 1090 1091 } 1092 1093 /* see if we've set up our endpoint info yet * 1094 * (can't set it up in mos7840_startup as the * 1095 * structures were not set up at that time.) */ 1096 1097 dbg("port number is %d", port->number); 1098 dbg("serial number is %d", port->serial->minor); 1099 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); 1100 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); 1101 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); 1102 dbg("port's number in the device is %d", mos7840_port->port_num); 1103 mos7840_port->read_urb = port->read_urb; 1104 1105 /* set up our bulk in urb */ 1106 1107 usb_fill_bulk_urb(mos7840_port->read_urb, 1108 serial->dev, 1109 usb_rcvbulkpipe(serial->dev, 1110 port->bulk_in_endpointAddress), 1111 port->bulk_in_buffer, 1112 mos7840_port->read_urb->transfer_buffer_length, 1113 mos7840_bulk_in_callback, mos7840_port); 1114 1115 dbg("mos7840_open: bulkin endpoint is %d", 1116 port->bulk_in_endpointAddress); 1117 mos7840_port->read_urb_busy = true; 1118 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1119 if (response) { 1120 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1121 __func__, response); 1122 mos7840_port->read_urb_busy = false; 1123 } 1124 1125 /* initialize our wait queues */ 1126 init_waitqueue_head(&mos7840_port->wait_chase); 1127 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1128 1129 /* initialize our icount structure */ 1130 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1131 1132 /* initialize our port settings */ 1133 /* Must set to enable ints! */ 1134 mos7840_port->shadowMCR = MCR_MASTER_IE; 1135 /* send a open port command */ 1136 mos7840_port->open = 1; 1137 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1138 mos7840_port->icount.tx = 0; 1139 mos7840_port->icount.rx = 0; 1140 1141 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", 1142 serial, mos7840_port, port); 1143 1144 dbg ("%s leave", __func__); 1145 1146 return 0; 1147 1148} 1149 1150/***************************************************************************** 1151 * mos7840_chars_in_buffer 1152 * this function is called by the tty driver when it wants to know how many 1153 * bytes of data we currently have outstanding in the port (data that has 1154 * been written, but hasn't made it out the port yet) 1155 * If successful, we return the number of bytes left to be written in the 1156 * system, 1157 * Otherwise we return zero. 1158 *****************************************************************************/ 1159 1160static int mos7840_chars_in_buffer(struct tty_struct *tty) 1161{ 1162 struct usb_serial_port *port = tty->driver_data; 1163 int i; 1164 int chars = 0; 1165 unsigned long flags; 1166 struct moschip_port *mos7840_port; 1167 1168 dbg("%s", " mos7840_chars_in_buffer:entering ..........."); 1169 1170 if (mos7840_port_paranoia_check(port, __func__)) { 1171 dbg("%s", "Invalid port"); 1172 return 0; 1173 } 1174 1175 mos7840_port = mos7840_get_port_private(port); 1176 if (mos7840_port == NULL) { 1177 dbg("%s", "mos7840_break:leaving ..........."); 1178 return 0; 1179 } 1180 1181 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1182 for (i = 0; i < NUM_URBS; ++i) 1183 if (mos7840_port->busy[i]) 1184 chars += URB_TRANSFER_BUFFER_SIZE; 1185 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1186 dbg("%s - returns %d", __func__, chars); 1187 return chars; 1188 1189} 1190 1191/***************************************************************************** 1192 * mos7840_close 1193 * this function is called by the tty driver when a port is closed 1194 *****************************************************************************/ 1195 1196static void mos7840_close(struct usb_serial_port *port) 1197{ 1198 struct usb_serial *serial; 1199 struct moschip_port *mos7840_port; 1200 struct moschip_port *port0; 1201 int j; 1202 __u16 Data; 1203 1204 dbg("%s", "mos7840_close:entering..."); 1205 1206 if (mos7840_port_paranoia_check(port, __func__)) { 1207 dbg("%s", "Port Paranoia failed"); 1208 return; 1209 } 1210 1211 serial = mos7840_get_usb_serial(port, __func__); 1212 if (!serial) { 1213 dbg("%s", "Serial Paranoia failed"); 1214 return; 1215 } 1216 1217 mos7840_port = mos7840_get_port_private(port); 1218 port0 = mos7840_get_port_private(serial->port[0]); 1219 1220 if (mos7840_port == NULL || port0 == NULL) 1221 return; 1222 1223 for (j = 0; j < NUM_URBS; ++j) 1224 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1225 1226 /* Freeing Write URBs */ 1227 for (j = 0; j < NUM_URBS; ++j) { 1228 if (mos7840_port->write_urb_pool[j]) { 1229 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1230 kfree(mos7840_port->write_urb_pool[j]-> 1231 transfer_buffer); 1232 1233 usb_free_urb(mos7840_port->write_urb_pool[j]); 1234 } 1235 } 1236 1237 /* While closing port, shutdown all bulk read, write * 1238 * and interrupt read if they exists */ 1239 if (serial->dev) { 1240 if (mos7840_port->write_urb) { 1241 dbg("%s", "Shutdown bulk write"); 1242 usb_kill_urb(mos7840_port->write_urb); 1243 } 1244 if (mos7840_port->read_urb) { 1245 dbg("%s", "Shutdown bulk read"); 1246 usb_kill_urb(mos7840_port->read_urb); 1247 mos7840_port->read_urb_busy = false; 1248 } 1249 if ((&mos7840_port->control_urb)) { 1250 dbg("%s", "Shutdown control read"); 1251 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1252 } 1253 } 1254/* if(mos7840_port->ctrl_buf != NULL) */ 1255/* kfree(mos7840_port->ctrl_buf); */ 1256 port0->open_ports--; 1257 dbg("mos7840_num_open_ports in close%d:in port%d", 1258 port0->open_ports, port->number); 1259 if (port0->open_ports == 0) { 1260 if (serial->port[0]->interrupt_in_urb) { 1261 dbg("%s", "Shutdown interrupt_in_urb"); 1262 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1263 } 1264 } 1265 1266 if (mos7840_port->write_urb) { 1267 /* if this urb had a transfer buffer already (old tx) free it */ 1268 if (mos7840_port->write_urb->transfer_buffer != NULL) 1269 kfree(mos7840_port->write_urb->transfer_buffer); 1270 usb_free_urb(mos7840_port->write_urb); 1271 } 1272 1273 Data = 0x0; 1274 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1275 1276 Data = 0x00; 1277 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1278 1279 mos7840_port->open = 0; 1280 1281 dbg("%s", "Leaving ............"); 1282} 1283 1284/************************************************************************ 1285 * 1286 * mos7840_block_until_chase_response 1287 * 1288 * This function will block the close until one of the following: 1289 * 1. Response to our Chase comes from mos7840 1290 * 2. A timeout of 10 seconds without activity has expired 1291 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1292 * 1293 ************************************************************************/ 1294 1295static void mos7840_block_until_chase_response(struct tty_struct *tty, 1296 struct moschip_port *mos7840_port) 1297{ 1298 int timeout = 1 * HZ; 1299 int wait = 10; 1300 int count; 1301 1302 while (1) { 1303 count = mos7840_chars_in_buffer(tty); 1304 1305 /* Check for Buffer status */ 1306 if (count <= 0) 1307 return; 1308 1309 /* Block the thread for a while */ 1310 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1311 timeout); 1312 /* No activity.. count down section */ 1313 wait--; 1314 if (wait == 0) { 1315 dbg("%s - TIMEOUT", __func__); 1316 return; 1317 } else { 1318 /* Reset timeout value back to seconds */ 1319 wait = 10; 1320 } 1321 } 1322 1323} 1324 1325/***************************************************************************** 1326 * mos7840_break 1327 * this function sends a break to the port 1328 *****************************************************************************/ 1329static void mos7840_break(struct tty_struct *tty, int break_state) 1330{ 1331 struct usb_serial_port *port = tty->driver_data; 1332 unsigned char data; 1333 struct usb_serial *serial; 1334 struct moschip_port *mos7840_port; 1335 1336 dbg("%s", "Entering ..........."); 1337 dbg("mos7840_break: Start"); 1338 1339 if (mos7840_port_paranoia_check(port, __func__)) { 1340 dbg("%s", "Port Paranoia failed"); 1341 return; 1342 } 1343 1344 serial = mos7840_get_usb_serial(port, __func__); 1345 if (!serial) { 1346 dbg("%s", "Serial Paranoia failed"); 1347 return; 1348 } 1349 1350 mos7840_port = mos7840_get_port_private(port); 1351 1352 if (mos7840_port == NULL) 1353 return; 1354 1355 if (serial->dev) 1356 /* flush and block until tx is empty */ 1357 mos7840_block_until_chase_response(tty, mos7840_port); 1358 1359 if (break_state == -1) 1360 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1361 else 1362 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1363 1364 mos7840_port->shadowLCR = data; 1365 dbg("mcs7840_break mos7840_port->shadowLCR is %x", 1366 mos7840_port->shadowLCR); 1367 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1368 mos7840_port->shadowLCR); 1369 1370 return; 1371} 1372 1373/***************************************************************************** 1374 * mos7840_write_room 1375 * this function is called by the tty driver when it wants to know how many 1376 * bytes of data we can accept for a specific port. 1377 * If successful, we return the amount of room that we have for this port 1378 * Otherwise we return a negative error number. 1379 *****************************************************************************/ 1380 1381static int mos7840_write_room(struct tty_struct *tty) 1382{ 1383 struct usb_serial_port *port = tty->driver_data; 1384 int i; 1385 int room = 0; 1386 unsigned long flags; 1387 struct moschip_port *mos7840_port; 1388 1389 dbg("%s", " mos7840_write_room:entering ..........."); 1390 1391 if (mos7840_port_paranoia_check(port, __func__)) { 1392 dbg("%s", "Invalid port"); 1393 dbg("%s", " mos7840_write_room:leaving ..........."); 1394 return -1; 1395 } 1396 1397 mos7840_port = mos7840_get_port_private(port); 1398 if (mos7840_port == NULL) { 1399 dbg("%s", "mos7840_break:leaving ..........."); 1400 return -1; 1401 } 1402 1403 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1404 for (i = 0; i < NUM_URBS; ++i) { 1405 if (!mos7840_port->busy[i]) 1406 room += URB_TRANSFER_BUFFER_SIZE; 1407 } 1408 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1409 1410 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1411 dbg("%s - returns %d", __func__, room); 1412 return room; 1413 1414} 1415 1416/***************************************************************************** 1417 * mos7840_write 1418 * this function is called by the tty driver when data should be written to 1419 * the port. 1420 * If successful, we return the number of bytes written, otherwise we 1421 * return a negative error number. 1422 *****************************************************************************/ 1423 1424static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1425 const unsigned char *data, int count) 1426{ 1427 int status; 1428 int i; 1429 int bytes_sent = 0; 1430 int transfer_size; 1431 unsigned long flags; 1432 1433 struct moschip_port *mos7840_port; 1434 struct usb_serial *serial; 1435 struct urb *urb; 1436 /* __u16 Data; */ 1437 const unsigned char *current_position = data; 1438 unsigned char *data1; 1439 dbg("%s", "entering ..........."); 1440 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1441 mos7840_port->shadowLCR); */ 1442 1443#ifdef NOTMOS7840 1444 Data = 0x00; 1445 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1446 mos7840_port->shadowLCR = Data; 1447 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); 1448 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1449 mos7840_port->shadowLCR); 1450 1451 /* Data = 0x03; */ 1452 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1453 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1454 1455 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1456 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1457 1458 /* Data = 0x0c; */ 1459 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1460 Data = 0x00; 1461 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1462 dbg("mos7840_write:DLL value is %x", Data); 1463 1464 Data = 0x0; 1465 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1466 dbg("mos7840_write:DLM value is %x", Data); 1467 1468 Data = Data & ~SERIAL_LCR_DLAB; 1469 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1470 mos7840_port->shadowLCR); 1471 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1472#endif 1473 1474 if (mos7840_port_paranoia_check(port, __func__)) { 1475 dbg("%s", "Port Paranoia failed"); 1476 return -1; 1477 } 1478 1479 serial = port->serial; 1480 if (mos7840_serial_paranoia_check(serial, __func__)) { 1481 dbg("%s", "Serial Paranoia failed"); 1482 return -1; 1483 } 1484 1485 mos7840_port = mos7840_get_port_private(port); 1486 if (mos7840_port == NULL) { 1487 dbg("%s", "mos7840_port is NULL"); 1488 return -1; 1489 } 1490 1491 /* try to find a free urb in the list */ 1492 urb = NULL; 1493 1494 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1495 for (i = 0; i < NUM_URBS; ++i) { 1496 if (!mos7840_port->busy[i]) { 1497 mos7840_port->busy[i] = 1; 1498 urb = mos7840_port->write_urb_pool[i]; 1499 dbg("URB:%d", i); 1500 break; 1501 } 1502 } 1503 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1504 1505 if (urb == NULL) { 1506 dbg("%s - no more free urbs", __func__); 1507 goto exit; 1508 } 1509 1510 if (urb->transfer_buffer == NULL) { 1511 urb->transfer_buffer = 1512 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1513 1514 if (urb->transfer_buffer == NULL) { 1515 dev_err(&port->dev, "%s no more kernel memory...\n", 1516 __func__); 1517 goto exit; 1518 } 1519 } 1520 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1521 1522 memcpy(urb->transfer_buffer, current_position, transfer_size); 1523 1524 /* fill urb with data and submit */ 1525 usb_fill_bulk_urb(urb, 1526 serial->dev, 1527 usb_sndbulkpipe(serial->dev, 1528 port->bulk_out_endpointAddress), 1529 urb->transfer_buffer, 1530 transfer_size, 1531 mos7840_bulk_out_data_callback, mos7840_port); 1532 1533 data1 = urb->transfer_buffer; 1534 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); 1535 1536 /* send it down the pipe */ 1537 status = usb_submit_urb(urb, GFP_ATOMIC); 1538 1539 if (status) { 1540 mos7840_port->busy[i] = 0; 1541 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 1542 "with status = %d\n", __func__, status); 1543 bytes_sent = status; 1544 goto exit; 1545 } 1546 bytes_sent = transfer_size; 1547 mos7840_port->icount.tx += transfer_size; 1548 smp_wmb(); 1549 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); 1550exit: 1551 return bytes_sent; 1552 1553} 1554 1555/***************************************************************************** 1556 * mos7840_throttle 1557 * this function is called by the tty driver when it wants to stop the data 1558 * being read from the port. 1559 *****************************************************************************/ 1560 1561static void mos7840_throttle(struct tty_struct *tty) 1562{ 1563 struct usb_serial_port *port = tty->driver_data; 1564 struct moschip_port *mos7840_port; 1565 int status; 1566 1567 if (mos7840_port_paranoia_check(port, __func__)) { 1568 dbg("%s", "Invalid port"); 1569 return; 1570 } 1571 1572 dbg("- port %d", port->number); 1573 1574 mos7840_port = mos7840_get_port_private(port); 1575 1576 if (mos7840_port == NULL) 1577 return; 1578 1579 if (!mos7840_port->open) { 1580 dbg("%s", "port not opened"); 1581 return; 1582 } 1583 1584 dbg("%s", "Entering .........."); 1585 1586 /* if we are implementing XON/XOFF, send the stop character */ 1587 if (I_IXOFF(tty)) { 1588 unsigned char stop_char = STOP_CHAR(tty); 1589 status = mos7840_write(tty, port, &stop_char, 1); 1590 if (status <= 0) 1591 return; 1592 } 1593 /* if we are implementing RTS/CTS, toggle that line */ 1594 if (tty->termios->c_cflag & CRTSCTS) { 1595 mos7840_port->shadowMCR &= ~MCR_RTS; 1596 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1597 mos7840_port->shadowMCR); 1598 if (status < 0) 1599 return; 1600 } 1601 1602 return; 1603} 1604 1605/***************************************************************************** 1606 * mos7840_unthrottle 1607 * this function is called by the tty driver when it wants to resume 1608 * the data being read from the port (called after mos7840_throttle is 1609 * called) 1610 *****************************************************************************/ 1611static void mos7840_unthrottle(struct tty_struct *tty) 1612{ 1613 struct usb_serial_port *port = tty->driver_data; 1614 int status; 1615 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1616 1617 if (mos7840_port_paranoia_check(port, __func__)) { 1618 dbg("%s", "Invalid port"); 1619 return; 1620 } 1621 1622 if (mos7840_port == NULL) 1623 return; 1624 1625 if (!mos7840_port->open) { 1626 dbg("%s - port not opened", __func__); 1627 return; 1628 } 1629 1630 dbg("%s", "Entering .........."); 1631 1632 /* if we are implementing XON/XOFF, send the start character */ 1633 if (I_IXOFF(tty)) { 1634 unsigned char start_char = START_CHAR(tty); 1635 status = mos7840_write(tty, port, &start_char, 1); 1636 if (status <= 0) 1637 return; 1638 } 1639 1640 /* if we are implementing RTS/CTS, toggle that line */ 1641 if (tty->termios->c_cflag & CRTSCTS) { 1642 mos7840_port->shadowMCR |= MCR_RTS; 1643 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1644 mos7840_port->shadowMCR); 1645 if (status < 0) 1646 return; 1647 } 1648} 1649 1650static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) 1651{ 1652 struct usb_serial_port *port = tty->driver_data; 1653 struct moschip_port *mos7840_port; 1654 unsigned int result; 1655 __u16 msr; 1656 __u16 mcr; 1657 int status; 1658 mos7840_port = mos7840_get_port_private(port); 1659 1660 dbg("%s - port %d", __func__, port->number); 1661 1662 if (mos7840_port == NULL) 1663 return -ENODEV; 1664 1665 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1666 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1667 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1668 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1669 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1670 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1671 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1672 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1673 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1674 1675 dbg("%s - 0x%04X", __func__, result); 1676 1677 return result; 1678} 1679 1680static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, 1681 unsigned int set, unsigned int clear) 1682{ 1683 struct usb_serial_port *port = tty->driver_data; 1684 struct moschip_port *mos7840_port; 1685 unsigned int mcr; 1686 int status; 1687 1688 dbg("%s - port %d", __func__, port->number); 1689 1690 mos7840_port = mos7840_get_port_private(port); 1691 1692 if (mos7840_port == NULL) 1693 return -ENODEV; 1694 1695 mcr = mos7840_port->shadowMCR; 1696 if (clear & TIOCM_RTS) 1697 mcr &= ~MCR_RTS; 1698 if (clear & TIOCM_DTR) 1699 mcr &= ~MCR_DTR; 1700 if (clear & TIOCM_LOOP) 1701 mcr &= ~MCR_LOOPBACK; 1702 1703 if (set & TIOCM_RTS) 1704 mcr |= MCR_RTS; 1705 if (set & TIOCM_DTR) 1706 mcr |= MCR_DTR; 1707 if (set & TIOCM_LOOP) 1708 mcr |= MCR_LOOPBACK; 1709 1710 mos7840_port->shadowMCR = mcr; 1711 1712 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1713 if (status < 0) { 1714 dbg("setting MODEM_CONTROL_REGISTER Failed"); 1715 return status; 1716 } 1717 1718 return 0; 1719} 1720 1721/***************************************************************************** 1722 * mos7840_calc_baud_rate_divisor 1723 * this function calculates the proper baud rate divisor for the specified 1724 * baud rate. 1725 *****************************************************************************/ 1726static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1727 __u16 *clk_sel_val) 1728{ 1729 1730 dbg("%s - %d", __func__, baudRate); 1731 1732 if (baudRate <= 115200) { 1733 *divisor = 115200 / baudRate; 1734 *clk_sel_val = 0x0; 1735 } 1736 if ((baudRate > 115200) && (baudRate <= 230400)) { 1737 *divisor = 230400 / baudRate; 1738 *clk_sel_val = 0x10; 1739 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1740 *divisor = 403200 / baudRate; 1741 *clk_sel_val = 0x20; 1742 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1743 *divisor = 460800 / baudRate; 1744 *clk_sel_val = 0x30; 1745 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1746 *divisor = 806400 / baudRate; 1747 *clk_sel_val = 0x40; 1748 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1749 *divisor = 921600 / baudRate; 1750 *clk_sel_val = 0x50; 1751 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1752 *divisor = 1572864 / baudRate; 1753 *clk_sel_val = 0x60; 1754 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1755 *divisor = 3145728 / baudRate; 1756 *clk_sel_val = 0x70; 1757 } 1758 return 0; 1759 1760#ifdef NOTMCS7840 1761 1762 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1763 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1764 *divisor = mos7840_divisor_table[i].Divisor; 1765 return 0; 1766 } 1767 } 1768 1769 /* After trying for all the standard baud rates * 1770 * Try calculating the divisor for this baud rate */ 1771 1772 if (baudrate > 75 && baudrate < 230400) { 1773 /* get the divisor */ 1774 custom = (__u16) (230400L / baudrate); 1775 1776 /* Check for round off */ 1777 round1 = (__u16) (2304000L / baudrate); 1778 round = (__u16) (round1 - (custom * 10)); 1779 if (round > 4) 1780 custom++; 1781 *divisor = custom; 1782 1783 dbg(" Baud %d = %d", baudrate, custom); 1784 return 0; 1785 } 1786 1787 dbg("%s", " Baud calculation Failed..."); 1788 return -1; 1789#endif 1790} 1791 1792/***************************************************************************** 1793 * mos7840_send_cmd_write_baud_rate 1794 * this function sends the proper command to change the baud rate of the 1795 * specified port. 1796 *****************************************************************************/ 1797 1798static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1799 int baudRate) 1800{ 1801 int divisor = 0; 1802 int status; 1803 __u16 Data; 1804 unsigned char number; 1805 __u16 clk_sel_val; 1806 struct usb_serial_port *port; 1807 1808 if (mos7840_port == NULL) 1809 return -1; 1810 1811 port = (struct usb_serial_port *)mos7840_port->port; 1812 if (mos7840_port_paranoia_check(port, __func__)) { 1813 dbg("%s", "Invalid port"); 1814 return -1; 1815 } 1816 1817 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1818 dbg("%s", "Invalid Serial"); 1819 return -1; 1820 } 1821 1822 dbg("%s", "Entering .........."); 1823 1824 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1825 1826 dbg("%s - port = %d, baud = %d", __func__, 1827 mos7840_port->port->number, baudRate); 1828 /* reset clk_uart_sel in spregOffset */ 1829 if (baudRate > 115200) { 1830#ifdef HW_flow_control 1831 /* NOTE: need to see the pther register to modify */ 1832 /* setting h/w flow control bit to 1 */ 1833 Data = 0x2b; 1834 mos7840_port->shadowMCR = Data; 1835 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1836 Data); 1837 if (status < 0) { 1838 dbg("Writing spreg failed in set_serial_baud"); 1839 return -1; 1840 } 1841#endif 1842 1843 } else { 1844#ifdef HW_flow_control 1845 / *setting h/w flow control bit to 0 */ 1846 Data = 0xb; 1847 mos7840_port->shadowMCR = Data; 1848 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1849 Data); 1850 if (status < 0) { 1851 dbg("Writing spreg failed in set_serial_baud"); 1852 return -1; 1853 } 1854#endif 1855 1856 } 1857 1858 if (1) { /* baudRate <= 115200) */ 1859 clk_sel_val = 0x0; 1860 Data = 0x0; 1861 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1862 &clk_sel_val); 1863 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1864 &Data); 1865 if (status < 0) { 1866 dbg("reading spreg failed in set_serial_baud"); 1867 return -1; 1868 } 1869 Data = (Data & 0x8f) | clk_sel_val; 1870 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1871 Data); 1872 if (status < 0) { 1873 dbg("Writing spreg failed in set_serial_baud"); 1874 return -1; 1875 } 1876 /* Calculate the Divisor */ 1877 1878 if (status) { 1879 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1880 return status; 1881 } 1882 /* Enable access to divisor latch */ 1883 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1884 mos7840_port->shadowLCR = Data; 1885 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1886 1887 /* Write the divisor */ 1888 Data = (unsigned char)(divisor & 0xff); 1889 dbg("set_serial_baud Value to write DLL is %x", Data); 1890 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1891 1892 Data = (unsigned char)((divisor & 0xff00) >> 8); 1893 dbg("set_serial_baud Value to write DLM is %x", Data); 1894 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1895 1896 /* Disable access to divisor latch */ 1897 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1898 mos7840_port->shadowLCR = Data; 1899 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1900 1901 } 1902 return status; 1903} 1904 1905/***************************************************************************** 1906 * mos7840_change_port_settings 1907 * This routine is called to set the UART on the device to match 1908 * the specified new settings. 1909 *****************************************************************************/ 1910 1911static void mos7840_change_port_settings(struct tty_struct *tty, 1912 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1913{ 1914 int baud; 1915 unsigned cflag; 1916 unsigned iflag; 1917 __u8 lData; 1918 __u8 lParity; 1919 __u8 lStop; 1920 int status; 1921 __u16 Data; 1922 struct usb_serial_port *port; 1923 struct usb_serial *serial; 1924 1925 if (mos7840_port == NULL) 1926 return; 1927 1928 port = (struct usb_serial_port *)mos7840_port->port; 1929 1930 if (mos7840_port_paranoia_check(port, __func__)) { 1931 dbg("%s", "Invalid port"); 1932 return; 1933 } 1934 1935 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1936 dbg("%s", "Invalid Serial"); 1937 return; 1938 } 1939 1940 serial = port->serial; 1941 1942 dbg("%s - port %d", __func__, mos7840_port->port->number); 1943 1944 if (!mos7840_port->open) { 1945 dbg("%s - port not opened", __func__); 1946 return; 1947 } 1948 1949 dbg("%s", "Entering .........."); 1950 1951 lData = LCR_BITS_8; 1952 lStop = LCR_STOP_1; 1953 lParity = LCR_PAR_NONE; 1954 1955 cflag = tty->termios->c_cflag; 1956 iflag = tty->termios->c_iflag; 1957 1958 /* Change the number of bits */ 1959 if (cflag & CSIZE) { 1960 switch (cflag & CSIZE) { 1961 case CS5: 1962 lData = LCR_BITS_5; 1963 break; 1964 1965 case CS6: 1966 lData = LCR_BITS_6; 1967 break; 1968 1969 case CS7: 1970 lData = LCR_BITS_7; 1971 break; 1972 default: 1973 case CS8: 1974 lData = LCR_BITS_8; 1975 break; 1976 } 1977 } 1978 /* Change the Parity bit */ 1979 if (cflag & PARENB) { 1980 if (cflag & PARODD) { 1981 lParity = LCR_PAR_ODD; 1982 dbg("%s - parity = odd", __func__); 1983 } else { 1984 lParity = LCR_PAR_EVEN; 1985 dbg("%s - parity = even", __func__); 1986 } 1987 1988 } else { 1989 dbg("%s - parity = none", __func__); 1990 } 1991 1992 if (cflag & CMSPAR) 1993 lParity = lParity | 0x20; 1994 1995 /* Change the Stop bit */ 1996 if (cflag & CSTOPB) { 1997 lStop = LCR_STOP_2; 1998 dbg("%s - stop bits = 2", __func__); 1999 } else { 2000 lStop = LCR_STOP_1; 2001 dbg("%s - stop bits = 1", __func__); 2002 } 2003 2004 /* Update the LCR with the correct value */ 2005 mos7840_port->shadowLCR &= 2006 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2007 mos7840_port->shadowLCR |= (lData | lParity | lStop); 2008 2009 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", 2010 mos7840_port->shadowLCR); 2011 /* Disable Interrupts */ 2012 Data = 0x00; 2013 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2014 2015 Data = 0x00; 2016 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2017 2018 Data = 0xcf; 2019 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2020 2021 /* Send the updated LCR value to the mos7840 */ 2022 Data = mos7840_port->shadowLCR; 2023 2024 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 2025 2026 Data = 0x00b; 2027 mos7840_port->shadowMCR = Data; 2028 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2029 Data = 0x00b; 2030 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2031 2032 /* set up the MCR register and send it to the mos7840 */ 2033 2034 mos7840_port->shadowMCR = MCR_MASTER_IE; 2035 if (cflag & CBAUD) 2036 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2037 2038 if (cflag & CRTSCTS) 2039 mos7840_port->shadowMCR |= (MCR_XON_ANY); 2040 else 2041 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2042 2043 Data = mos7840_port->shadowMCR; 2044 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2045 2046 /* Determine divisor based on baud rate */ 2047 baud = tty_get_baud_rate(tty); 2048 2049 if (!baud) { 2050 /* pick a default, any default... */ 2051 dbg("%s", "Picked default baud..."); 2052 baud = 9600; 2053 } 2054 2055 dbg("%s - baud rate = %d", __func__, baud); 2056 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2057 2058 /* Enable Interrupts */ 2059 Data = 0x0c; 2060 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2061 2062 if (mos7840_port->read_urb_busy == false) { 2063 mos7840_port->read_urb->dev = serial->dev; 2064 mos7840_port->read_urb_busy = true; 2065 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2066 if (status) { 2067 dbg("usb_submit_urb(read bulk) failed, status = %d", 2068 status); 2069 mos7840_port->read_urb_busy = false; 2070 } 2071 } 2072 wake_up(&mos7840_port->delta_msr_wait); 2073 mos7840_port->delta_msr_cond = 1; 2074 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", 2075 mos7840_port->shadowLCR); 2076 2077 return; 2078} 2079 2080/***************************************************************************** 2081 * mos7840_set_termios 2082 * this function is called by the tty driver when it wants to change 2083 * the termios structure 2084 *****************************************************************************/ 2085 2086static void mos7840_set_termios(struct tty_struct *tty, 2087 struct usb_serial_port *port, 2088 struct ktermios *old_termios) 2089{ 2090 int status; 2091 unsigned int cflag; 2092 struct usb_serial *serial; 2093 struct moschip_port *mos7840_port; 2094 dbg("mos7840_set_termios: START"); 2095 if (mos7840_port_paranoia_check(port, __func__)) { 2096 dbg("%s", "Invalid port"); 2097 return; 2098 } 2099 2100 serial = port->serial; 2101 2102 if (mos7840_serial_paranoia_check(serial, __func__)) { 2103 dbg("%s", "Invalid Serial"); 2104 return; 2105 } 2106 2107 mos7840_port = mos7840_get_port_private(port); 2108 2109 if (mos7840_port == NULL) 2110 return; 2111 2112 if (!mos7840_port->open) { 2113 dbg("%s - port not opened", __func__); 2114 return; 2115 } 2116 2117 dbg("%s", "setting termios - "); 2118 2119 cflag = tty->termios->c_cflag; 2120 2121 dbg("%s - clfag %08x iflag %08x", __func__, 2122 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2123 dbg("%s - old clfag %08x old iflag %08x", __func__, 2124 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2125 dbg("%s - port %d", __func__, port->number); 2126 2127 /* change the port settings to the new ones specified */ 2128 2129 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2130 2131 if (!mos7840_port->read_urb) { 2132 dbg("%s", "URB KILLED !!!!!"); 2133 return; 2134 } 2135 2136 if (mos7840_port->read_urb_busy == false) { 2137 mos7840_port->read_urb->dev = serial->dev; 2138 mos7840_port->read_urb_busy = true; 2139 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2140 if (status) { 2141 dbg("usb_submit_urb(read bulk) failed, status = %d", 2142 status); 2143 mos7840_port->read_urb_busy = false; 2144 } 2145 } 2146 return; 2147} 2148 2149/***************************************************************************** 2150 * mos7840_get_lsr_info - get line status register info 2151 * 2152 * Purpose: Let user call ioctl() to get info when the UART physically 2153 * is emptied. On bus types like RS485, the transmitter must 2154 * release the bus after transmitting. This must be done when 2155 * the transmit shift register is empty, not be done when the 2156 * transmit holding register is empty. This functionality 2157 * allows an RS485 driver to be written in user space. 2158 *****************************************************************************/ 2159 2160static int mos7840_get_lsr_info(struct tty_struct *tty, 2161 unsigned int __user *value) 2162{ 2163 int count; 2164 unsigned int result = 0; 2165 2166 count = mos7840_chars_in_buffer(tty); 2167 if (count == 0) { 2168 dbg("%s -- Empty", __func__); 2169 result = TIOCSER_TEMT; 2170 } 2171 2172 if (copy_to_user(value, &result, sizeof(int))) 2173 return -EFAULT; 2174 return 0; 2175} 2176 2177/***************************************************************************** 2178 * mos7840_get_serial_info 2179 * function to get information about serial port 2180 *****************************************************************************/ 2181 2182static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2183 struct serial_struct __user *retinfo) 2184{ 2185 struct serial_struct tmp; 2186 2187 if (mos7840_port == NULL) 2188 return -1; 2189 2190 if (!retinfo) 2191 return -EFAULT; 2192 2193 memset(&tmp, 0, sizeof(tmp)); 2194 2195 tmp.type = PORT_16550A; 2196 tmp.line = mos7840_port->port->serial->minor; 2197 tmp.port = mos7840_port->port->number; 2198 tmp.irq = 0; 2199 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2200 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2201 tmp.baud_base = 9600; 2202 tmp.close_delay = 5 * HZ; 2203 tmp.closing_wait = 30 * HZ; 2204 2205 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2206 return -EFAULT; 2207 return 0; 2208} 2209 2210/***************************************************************************** 2211 * SerialIoctl 2212 * this function handles any ioctl calls to the driver 2213 *****************************************************************************/ 2214 2215static int mos7840_ioctl(struct tty_struct *tty, struct file *file, 2216 unsigned int cmd, unsigned long arg) 2217{ 2218 struct usb_serial_port *port = tty->driver_data; 2219 void __user *argp = (void __user *)arg; 2220 struct moschip_port *mos7840_port; 2221 2222 struct async_icount cnow; 2223 struct async_icount cprev; 2224 struct serial_icounter_struct icount; 2225 2226 if (mos7840_port_paranoia_check(port, __func__)) { 2227 dbg("%s", "Invalid port"); 2228 return -1; 2229 } 2230 2231 mos7840_port = mos7840_get_port_private(port); 2232 2233 if (mos7840_port == NULL) 2234 return -1; 2235 2236 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2237 2238 switch (cmd) { 2239 /* return number of bytes available */ 2240 2241 case TIOCSERGETLSR: 2242 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2243 return mos7840_get_lsr_info(tty, argp); 2244 return 0; 2245 2246 case TIOCGSERIAL: 2247 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2248 return mos7840_get_serial_info(mos7840_port, argp); 2249 2250 case TIOCSSERIAL: 2251 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2252 break; 2253 2254 case TIOCMIWAIT: 2255 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2256 cprev = mos7840_port->icount; 2257 while (1) { 2258 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2259 mos7840_port->delta_msr_cond = 0; 2260 wait_event_interruptible(mos7840_port->delta_msr_wait, 2261 (mos7840_port-> 2262 delta_msr_cond == 1)); 2263 2264 /* see if a signal did it */ 2265 if (signal_pending(current)) 2266 return -ERESTARTSYS; 2267 cnow = mos7840_port->icount; 2268 smp_rmb(); 2269 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2270 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2271 return -EIO; /* no change => error */ 2272 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2273 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2274 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2275 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2276 return 0; 2277 } 2278 cprev = cnow; 2279 } 2280 /* NOTREACHED */ 2281 break; 2282 2283 case TIOCGICOUNT: 2284 cnow = mos7840_port->icount; 2285 smp_rmb(); 2286 2287 memset(&icount, 0, sizeof(struct serial_icounter_struct)); 2288 2289 icount.cts = cnow.cts; 2290 icount.dsr = cnow.dsr; 2291 icount.rng = cnow.rng; 2292 icount.dcd = cnow.dcd; 2293 icount.rx = cnow.rx; 2294 icount.tx = cnow.tx; 2295 icount.frame = cnow.frame; 2296 icount.overrun = cnow.overrun; 2297 icount.parity = cnow.parity; 2298 icount.brk = cnow.brk; 2299 icount.buf_overrun = cnow.buf_overrun; 2300 2301 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2302 port->number, icount.rx, icount.tx); 2303 if (copy_to_user(argp, &icount, sizeof(icount))) 2304 return -EFAULT; 2305 return 0; 2306 default: 2307 break; 2308 } 2309 return -ENOIOCTLCMD; 2310} 2311 2312static int mos7840_calc_num_ports(struct usb_serial *serial) 2313{ 2314 int mos7840_num_ports = 0; 2315 2316 dbg("numberofendpoints: cur %d, alt %d", 2317 (int)serial->interface->cur_altsetting->desc.bNumEndpoints, 2318 (int)serial->interface->altsetting->desc.bNumEndpoints); 2319 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2320 mos7840_num_ports = serial->num_ports = 2; 2321 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2322 serial->num_bulk_in = 4; 2323 serial->num_bulk_out = 4; 2324 mos7840_num_ports = serial->num_ports = 4; 2325 } 2326 dbg ("mos7840_num_ports = %d", mos7840_num_ports); 2327 return mos7840_num_ports; 2328} 2329 2330/**************************************************************************** 2331 * mos7840_startup 2332 ****************************************************************************/ 2333 2334static int mos7840_startup(struct usb_serial *serial) 2335{ 2336 struct moschip_port *mos7840_port; 2337 struct usb_device *dev; 2338 int i, status; 2339 2340 __u16 Data; 2341 dbg("%s", "mos7840_startup :Entering.........."); 2342 2343 if (!serial) { 2344 dbg("%s", "Invalid Handler"); 2345 return -1; 2346 } 2347 2348 dev = serial->dev; 2349 2350 dbg("%s", "Entering..."); 2351 dbg ("mos7840_startup: serial = %p", serial); 2352 2353 /* we set up the pointers to the endpoints in the mos7840_open * 2354 * function, as the structures aren't created yet. */ 2355 2356 /* set up port private structures */ 2357 for (i = 0; i < serial->num_ports; ++i) { 2358 dbg ("mos7840_startup: configuring port %d............", i); 2359 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2360 if (mos7840_port == NULL) { 2361 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2362 status = -ENOMEM; 2363 i--; /* don't follow NULL pointer cleaning up */ 2364 goto error; 2365 } 2366 2367 /* Initialize all port interrupt end point to port 0 int 2368 * endpoint. Our device has only one interrupt end point 2369 * common to all port */ 2370 2371 mos7840_port->port = serial->port[i]; 2372 mos7840_set_port_private(serial->port[i], mos7840_port); 2373 spin_lock_init(&mos7840_port->pool_lock); 2374 2375 /* minor is not initialised until later by 2376 * usb-serial.c:get_free_serial() and cannot therefore be used 2377 * to index device instances */ 2378 mos7840_port->port_num = i + 1; 2379 dbg ("serial->port[i]->number = %d", serial->port[i]->number); 2380 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); 2381 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); 2382 dbg ("serial->minor = %d", serial->minor); 2383 2384 if (mos7840_port->port_num == 1) { 2385 mos7840_port->SpRegOffset = 0x0; 2386 mos7840_port->ControlRegOffset = 0x1; 2387 mos7840_port->DcrRegOffset = 0x4; 2388 } else if ((mos7840_port->port_num == 2) 2389 && (serial->num_ports == 4)) { 2390 mos7840_port->SpRegOffset = 0x8; 2391 mos7840_port->ControlRegOffset = 0x9; 2392 mos7840_port->DcrRegOffset = 0x16; 2393 } else if ((mos7840_port->port_num == 2) 2394 && (serial->num_ports == 2)) { 2395 mos7840_port->SpRegOffset = 0xa; 2396 mos7840_port->ControlRegOffset = 0xb; 2397 mos7840_port->DcrRegOffset = 0x19; 2398 } else if ((mos7840_port->port_num == 3) 2399 && (serial->num_ports == 4)) { 2400 mos7840_port->SpRegOffset = 0xa; 2401 mos7840_port->ControlRegOffset = 0xb; 2402 mos7840_port->DcrRegOffset = 0x19; 2403 } else if ((mos7840_port->port_num == 4) 2404 && (serial->num_ports == 4)) { 2405 mos7840_port->SpRegOffset = 0xc; 2406 mos7840_port->ControlRegOffset = 0xd; 2407 mos7840_port->DcrRegOffset = 0x1c; 2408 } 2409 mos7840_dump_serial_port(mos7840_port); 2410 mos7840_set_port_private(serial->port[i], mos7840_port); 2411 2412 /* enable rx_disable bit in control register */ 2413 status = mos7840_get_reg_sync(serial->port[i], 2414 mos7840_port->ControlRegOffset, &Data); 2415 if (status < 0) { 2416 dbg("Reading ControlReg failed status-0x%x", status); 2417 break; 2418 } else 2419 dbg("ControlReg Reading success val is %x, status%d", 2420 Data, status); 2421 Data |= 0x08; /* setting driver done bit */ 2422 Data |= 0x04; /* sp1_bit to have cts change reflect in 2423 modem status reg */ 2424 2425 /* Data |= 0x20; //rx_disable bit */ 2426 status = mos7840_set_reg_sync(serial->port[i], 2427 mos7840_port->ControlRegOffset, Data); 2428 if (status < 0) { 2429 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); 2430 break; 2431 } else 2432 dbg("ControlReg Writing success(rx_disable) status%d", 2433 status); 2434 2435 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2436 and 0x24 in DCR3 */ 2437 Data = 0x01; 2438 status = mos7840_set_reg_sync(serial->port[i], 2439 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2440 if (status < 0) { 2441 dbg("Writing DCR0 failed status-0x%x", status); 2442 break; 2443 } else 2444 dbg("DCR0 Writing success status%d", status); 2445 2446 Data = 0x05; 2447 status = mos7840_set_reg_sync(serial->port[i], 2448 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2449 if (status < 0) { 2450 dbg("Writing DCR1 failed status-0x%x", status); 2451 break; 2452 } else 2453 dbg("DCR1 Writing success status%d", status); 2454 2455 Data = 0x24; 2456 status = mos7840_set_reg_sync(serial->port[i], 2457 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2458 if (status < 0) { 2459 dbg("Writing DCR2 failed status-0x%x", status); 2460 break; 2461 } else 2462 dbg("DCR2 Writing success status%d", status); 2463 2464 /* write values in clkstart0x0 and clkmulti 0x20 */ 2465 Data = 0x0; 2466 status = mos7840_set_reg_sync(serial->port[i], 2467 CLK_START_VALUE_REGISTER, Data); 2468 if (status < 0) { 2469 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); 2470 break; 2471 } else 2472 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); 2473 2474 Data = 0x20; 2475 status = mos7840_set_reg_sync(serial->port[i], 2476 CLK_MULTI_REGISTER, Data); 2477 if (status < 0) { 2478 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", 2479 status); 2480 goto error; 2481 } else 2482 dbg("CLK_MULTI_REGISTER Writing success status%d", 2483 status); 2484 2485 /* write value 0x0 to scratchpad register */ 2486 Data = 0x00; 2487 status = mos7840_set_uart_reg(serial->port[i], 2488 SCRATCH_PAD_REGISTER, Data); 2489 if (status < 0) { 2490 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", 2491 status); 2492 break; 2493 } else 2494 dbg("SCRATCH_PAD_REGISTER Writing success status%d", 2495 status); 2496 2497 /* Zero Length flag register */ 2498 if ((mos7840_port->port_num != 1) 2499 && (serial->num_ports == 2)) { 2500 2501 Data = 0xff; 2502 status = mos7840_set_reg_sync(serial->port[i], 2503 (__u16) (ZLP_REG1 + 2504 ((__u16)mos7840_port->port_num)), Data); 2505 dbg("ZLIP offset %x", 2506 (__u16) (ZLP_REG1 + 2507 ((__u16) mos7840_port->port_num))); 2508 if (status < 0) { 2509 dbg("Writing ZLP_REG%d failed status-0x%x", 2510 i + 2, status); 2511 break; 2512 } else 2513 dbg("ZLP_REG%d Writing success status%d", 2514 i + 2, status); 2515 } else { 2516 Data = 0xff; 2517 status = mos7840_set_reg_sync(serial->port[i], 2518 (__u16) (ZLP_REG1 + 2519 ((__u16)mos7840_port->port_num) - 0x1), Data); 2520 dbg("ZLIP offset %x", 2521 (__u16) (ZLP_REG1 + 2522 ((__u16) mos7840_port->port_num) - 0x1)); 2523 if (status < 0) { 2524 dbg("Writing ZLP_REG%d failed status-0x%x", 2525 i + 1, status); 2526 break; 2527 } else 2528 dbg("ZLP_REG%d Writing success status%d", 2529 i + 1, status); 2530 2531 } 2532 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2533 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2534 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2535 GFP_KERNEL); 2536 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2537 !mos7840_port->dr) { 2538 status = -ENOMEM; 2539 goto error; 2540 } 2541 } 2542 dbg ("mos7840_startup: all ports configured..........."); 2543 2544 /* Zero Length flag enable */ 2545 Data = 0x0f; 2546 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2547 if (status < 0) { 2548 dbg("Writing ZLP_REG5 failed status-0x%x", status); 2549 goto error; 2550 } else 2551 dbg("ZLP_REG5 Writing success status%d", status); 2552 2553 /* setting configuration feature to one */ 2554 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2555 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2556 return 0; 2557error: 2558 for (/* nothing */; i >= 0; i--) { 2559 mos7840_port = mos7840_get_port_private(serial->port[i]); 2560 2561 kfree(mos7840_port->dr); 2562 kfree(mos7840_port->ctrl_buf); 2563 usb_free_urb(mos7840_port->control_urb); 2564 kfree(mos7840_port); 2565 serial->port[i] = NULL; 2566 } 2567 return status; 2568} 2569 2570/**************************************************************************** 2571 * mos7840_disconnect 2572 * This function is called whenever the device is removed from the usb bus. 2573 ****************************************************************************/ 2574 2575static void mos7840_disconnect(struct usb_serial *serial) 2576{ 2577 int i; 2578 unsigned long flags; 2579 struct moschip_port *mos7840_port; 2580 dbg("%s", " disconnect :entering.........."); 2581 2582 if (!serial) { 2583 dbg("%s", "Invalid Handler"); 2584 return; 2585 } 2586 2587 /* check for the ports to be closed,close the ports and disconnect */ 2588 2589 /* free private structure allocated for serial port * 2590 * stop reads and writes on all ports */ 2591 2592 for (i = 0; i < serial->num_ports; ++i) { 2593 mos7840_port = mos7840_get_port_private(serial->port[i]); 2594 dbg ("mos7840_port %d = %p", i, mos7840_port); 2595 if (mos7840_port) { 2596 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2597 mos7840_port->zombie = 1; 2598 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2599 usb_kill_urb(mos7840_port->control_urb); 2600 } 2601 } 2602 2603 dbg("%s", "Thank u :: "); 2604 2605} 2606 2607/**************************************************************************** 2608 * mos7840_release 2609 * This function is called when the usb_serial structure is freed. 2610 ****************************************************************************/ 2611 2612static void mos7840_release(struct usb_serial *serial) 2613{ 2614 int i; 2615 struct moschip_port *mos7840_port; 2616 dbg("%s", " release :entering.........."); 2617 2618 if (!serial) { 2619 dbg("%s", "Invalid Handler"); 2620 return; 2621 } 2622 2623 /* check for the ports to be closed,close the ports and disconnect */ 2624 2625 /* free private structure allocated for serial port * 2626 * stop reads and writes on all ports */ 2627 2628 for (i = 0; i < serial->num_ports; ++i) { 2629 mos7840_port = mos7840_get_port_private(serial->port[i]); 2630 dbg("mos7840_port %d = %p", i, mos7840_port); 2631 if (mos7840_port) { 2632 kfree(mos7840_port->ctrl_buf); 2633 kfree(mos7840_port->dr); 2634 kfree(mos7840_port); 2635 } 2636 } 2637 2638 dbg("%s", "Thank u :: "); 2639 2640} 2641 2642static struct usb_driver io_driver = { 2643 .name = "mos7840", 2644 .probe = usb_serial_probe, 2645 .disconnect = usb_serial_disconnect, 2646 .id_table = moschip_id_table_combined, 2647 .no_dynamic_id = 1, 2648}; 2649 2650static struct usb_serial_driver moschip7840_4port_device = { 2651 .driver = { 2652 .owner = THIS_MODULE, 2653 .name = "mos7840", 2654 }, 2655 .description = DRIVER_DESC, 2656 .usb_driver = &io_driver, 2657 .id_table = moschip_port_id_table, 2658 .num_ports = 4, 2659 .open = mos7840_open, 2660 .close = mos7840_close, 2661 .write = mos7840_write, 2662 .write_room = mos7840_write_room, 2663 .chars_in_buffer = mos7840_chars_in_buffer, 2664 .throttle = mos7840_throttle, 2665 .unthrottle = mos7840_unthrottle, 2666 .calc_num_ports = mos7840_calc_num_ports, 2667#ifdef MCSSerialProbe 2668 .probe = mos7840_serial_probe, 2669#endif 2670 .ioctl = mos7840_ioctl, 2671 .set_termios = mos7840_set_termios, 2672 .break_ctl = mos7840_break, 2673 .tiocmget = mos7840_tiocmget, 2674 .tiocmset = mos7840_tiocmset, 2675 .attach = mos7840_startup, 2676 .disconnect = mos7840_disconnect, 2677 .release = mos7840_release, 2678 .read_bulk_callback = mos7840_bulk_in_callback, 2679 .read_int_callback = mos7840_interrupt_callback, 2680}; 2681 2682/**************************************************************************** 2683 * moschip7840_init 2684 * This is called by the module subsystem, or on startup to initialize us 2685 ****************************************************************************/ 2686static int __init moschip7840_init(void) 2687{ 2688 int retval; 2689 2690 dbg("%s", " mos7840_init :entering.........."); 2691 2692 /* Register with the usb serial */ 2693 retval = usb_serial_register(&moschip7840_4port_device); 2694 2695 if (retval) 2696 goto failed_port_device_register; 2697 2698 dbg("%s", "Entering..."); 2699 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2700 DRIVER_DESC "\n"); 2701 2702 /* Register with the usb */ 2703 retval = usb_register(&io_driver); 2704 if (retval == 0) { 2705 dbg("%s", "Leaving..."); 2706 return 0; 2707 } 2708 usb_serial_deregister(&moschip7840_4port_device); 2709failed_port_device_register: 2710 return retval; 2711} 2712 2713/**************************************************************************** 2714 * moschip7840_exit 2715 * Called when the driver is about to be unloaded. 2716 ****************************************************************************/ 2717static void __exit moschip7840_exit(void) 2718{ 2719 2720 dbg("%s", " mos7840_exit :entering.........."); 2721 2722 usb_deregister(&io_driver); 2723 2724 usb_serial_deregister(&moschip7840_4port_device); 2725 2726 dbg("%s", "Entering..."); 2727} 2728 2729module_init(moschip7840_init); 2730module_exit(moschip7840_exit); 2731 2732/* Module information */ 2733MODULE_DESCRIPTION(DRIVER_DESC); 2734MODULE_LICENSE("GPL"); 2735 2736module_param(debug, bool, S_IRUGO | S_IWUSR); 2737MODULE_PARM_DESC(debug, "Debug enabled or not"); 2738