1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 15 * 16 * Clean ups from Moschip version and a few ioctl implementations by: 17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 18 * 19 * Originally based on drivers/usb/serial/io_edgeport.c which is: 20 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 22 * 23 */ 24 25 #include <linux/kernel.h> 26 #include <linux/errno.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/smp_lock.h> 30 #include <linux/tty.h> 31 #include <linux/tty_driver.h> 32 #include <linux/tty_flip.h> 33 #include <linux/module.h> 34 #include <linux/serial.h> 35 #include <linux/usb.h> 36 #include <linux/usb/serial.h> 37 #include <linux/uaccess.h> 38 39 /* 40 * Version Information 41 */ 42 #define DRIVER_VERSION "1.3.2" 43 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 44 45 /* 46 * 16C50 UART register defines 47 */ 48 49 #define LCR_BITS_5 0x00 /* 5 bits/char */ 50 #define LCR_BITS_6 0x01 /* 6 bits/char */ 51 #define LCR_BITS_7 0x02 /* 7 bits/char */ 52 #define LCR_BITS_8 0x03 /* 8 bits/char */ 53 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 54 55 #define LCR_STOP_1 0x00 /* 1 stop bit */ 56 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 57 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 58 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 59 60 #define LCR_PAR_NONE 0x00 /* No parity */ 61 #define LCR_PAR_ODD 0x08 /* Odd parity */ 62 #define LCR_PAR_EVEN 0x18 /* Even parity */ 63 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 64 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 65 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 66 67 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 68 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 69 70 #define MCR_DTR 0x01 /* Assert DTR */ 71 #define MCR_RTS 0x02 /* Assert RTS */ 72 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 73 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 74 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 75 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 76 77 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 78 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 79 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 80 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 81 82 /* 83 * Defines used for sending commands to port 84 */ 85 86 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */ 87 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */ 88 89 #define MOS_PORT1 0x0200 90 #define MOS_PORT2 0x0300 91 #define MOS_VENREG 0x0000 92 #define MOS_MAX_PORT 0x02 93 #define MOS_WRITE 0x0E 94 #define MOS_READ 0x0D 95 96 /* Requests */ 97 #define MCS_RD_RTYPE 0xC0 98 #define MCS_WR_RTYPE 0x40 99 #define MCS_RDREQ 0x0D 100 #define MCS_WRREQ 0x0E 101 #define MCS_CTRL_TIMEOUT 500 102 #define VENDOR_READ_LENGTH (0x01) 103 104 #define MAX_NAME_LEN 64 105 106 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 107 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 108 109 /* For higher baud Rates use TIOCEXBAUD */ 110 #define TIOCEXBAUD 0x5462 111 112 /* vendor id and device id defines */ 113 114 /* The native mos7840/7820 component */ 115 #define USB_VENDOR_ID_MOSCHIP 0x9710 116 #define MOSCHIP_DEVICE_ID_7840 0x7840 117 #define MOSCHIP_DEVICE_ID_7820 0x7820 118 /* The native component can have its vendor/device id's overridden 119 * in vendor-specific implementations. Such devices can be handled 120 * by making a change here, in moschip_port_id_table, and in 121 * moschip_id_table_combined 122 */ 123 #define USB_VENDOR_ID_BANDB 0x0856 124 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 125 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 126 127 /* This driver also supports the ATEN UC2324 device since it is mos7840 based 128 * - if I knew the device id it would also support the ATEN UC2322 */ 129 #define USB_VENDOR_ID_ATENINTL 0x0557 130 #define ATENINTL_DEVICE_ID_UC2324 0x2011 131 132 /* Interrupt Routine Defines */ 133 134 #define SERIAL_IIR_RLS 0x06 135 #define SERIAL_IIR_MS 0x00 136 137 /* 138 * Emulation of the bit mask on the LINE STATUS REGISTER. 139 */ 140 #define SERIAL_LSR_DR 0x0001 141 #define SERIAL_LSR_OE 0x0002 142 #define SERIAL_LSR_PE 0x0004 143 #define SERIAL_LSR_FE 0x0008 144 #define SERIAL_LSR_BI 0x0010 145 146 #define MOS_MSR_DELTA_CTS 0x10 147 #define MOS_MSR_DELTA_DSR 0x20 148 #define MOS_MSR_DELTA_RI 0x40 149 #define MOS_MSR_DELTA_CD 0x80 150 151 /* Serial Port register Address */ 152 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 153 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 154 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 155 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 156 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 157 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 158 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 159 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 160 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 161 162 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 163 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 164 165 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 166 167 /* 168 * URB POOL related defines 169 */ 170 #define NUM_URBS 16 /* URB Count */ 171 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 172 173 174 static struct usb_device_id moschip_port_id_table[] = { 175 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 176 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 177 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 178 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 179 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 180 {} /* terminating entry */ 181 }; 182 183 static __devinitdata struct usb_device_id moschip_id_table_combined[] = { 184 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 185 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 186 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 187 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 188 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 189 {} /* terminating entry */ 190 }; 191 192 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); 193 194 /* This structure holds all of the local port information */ 195 196 struct moschip_port { 197 int port_num; /*Actual port number in the device(1,2,etc) */ 198 struct urb *write_urb; /* write URB for this port */ 199 struct urb *read_urb; /* read URB for this port */ 200 struct urb *int_urb; 201 __u8 shadowLCR; /* last LCR value received */ 202 __u8 shadowMCR; /* last MCR value received */ 203 char open; 204 char open_ports; 205 char zombie; 206 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 207 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 208 int delta_msr_cond; 209 struct async_icount icount; 210 struct usb_serial_port *port; /* loop back to the owner of this object */ 211 212 /* Offsets */ 213 __u8 SpRegOffset; 214 __u8 ControlRegOffset; 215 __u8 DcrRegOffset; 216 /* for processing control URBS in interrupt context */ 217 struct urb *control_urb; 218 struct usb_ctrlrequest *dr; 219 char *ctrl_buf; 220 int MsrLsr; 221 222 spinlock_t pool_lock; 223 struct urb *write_urb_pool[NUM_URBS]; 224 char busy[NUM_URBS]; 225 bool read_urb_busy; 226 }; 227 228 229 static int debug; 230 231 /* 232 * mos7840_set_reg_sync 233 * To set the Control register by calling usb_fill_control_urb function 234 * by passing usb_sndctrlpipe function as parameter. 235 */ 236 237 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 238 __u16 val) 239 { 240 struct usb_device *dev = port->serial->dev; 241 val = val & 0x00ff; 242 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val); 243 244 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 245 MCS_WR_RTYPE, val, reg, NULL, 0, 246 MOS_WDR_TIMEOUT); 247 } 248 249 /* 250 * mos7840_get_reg_sync 251 * To set the Uart register by calling usb_fill_control_urb function by 252 * passing usb_rcvctrlpipe function as parameter. 253 */ 254 255 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 256 __u16 *val) 257 { 258 struct usb_device *dev = port->serial->dev; 259 int ret = 0; 260 261 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 262 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, 263 MOS_WDR_TIMEOUT); 264 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); 265 *val = (*val) & 0x00ff; 266 return ret; 267 } 268 269 /* 270 * mos7840_set_uart_reg 271 * To set the Uart register by calling usb_fill_control_urb function by 272 * passing usb_sndctrlpipe function as parameter. 273 */ 274 275 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 276 __u16 val) 277 { 278 279 struct usb_device *dev = port->serial->dev; 280 val = val & 0x00ff; 281 /* For the UART control registers, the application number need 282 to be Or'ed */ 283 if (port->serial->num_ports == 4) { 284 val |= (((__u16) port->number - 285 (__u16) (port->serial->minor)) + 1) << 8; 286 dbg("mos7840_set_uart_reg application number is %x", val); 287 } else { 288 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 289 val |= (((__u16) port->number - 290 (__u16) (port->serial->minor)) + 1) << 8; 291 dbg("mos7840_set_uart_reg application number is %x", 292 val); 293 } else { 294 val |= 295 (((__u16) port->number - 296 (__u16) (port->serial->minor)) + 2) << 8; 297 dbg("mos7840_set_uart_reg application number is %x", 298 val); 299 } 300 } 301 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 302 MCS_WR_RTYPE, val, reg, NULL, 0, 303 MOS_WDR_TIMEOUT); 304 305 } 306 307 /* 308 * mos7840_get_uart_reg 309 * To set the Control register by calling usb_fill_control_urb function 310 * by passing usb_rcvctrlpipe function as parameter. 311 */ 312 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 313 __u16 *val) 314 { 315 struct usb_device *dev = port->serial->dev; 316 int ret = 0; 317 __u16 Wval; 318 319 /* dbg("application number is %4x", 320 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ 321 /* Wval is same as application number */ 322 if (port->serial->num_ports == 4) { 323 Wval = 324 (((__u16) port->number - (__u16) (port->serial->minor)) + 325 1) << 8; 326 dbg("mos7840_get_uart_reg application number is %x", Wval); 327 } else { 328 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 329 Wval = (((__u16) port->number - 330 (__u16) (port->serial->minor)) + 1) << 8; 331 dbg("mos7840_get_uart_reg application number is %x", 332 Wval); 333 } else { 334 Wval = (((__u16) port->number - 335 (__u16) (port->serial->minor)) + 2) << 8; 336 dbg("mos7840_get_uart_reg application number is %x", 337 Wval); 338 } 339 } 340 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 341 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, 342 MOS_WDR_TIMEOUT); 343 *val = (*val) & 0x00ff; 344 return ret; 345 } 346 347 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 348 { 349 350 dbg("***************************************"); 351 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset); 352 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset); 353 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset); 354 dbg("***************************************"); 355 356 } 357 358 /************************************************************************/ 359 /************************************************************************/ 360 /* I N T E R F A C E F U N C T I O N S */ 361 /* I N T E R F A C E F U N C T I O N S */ 362 /************************************************************************/ 363 /************************************************************************/ 364 365 static inline void mos7840_set_port_private(struct usb_serial_port *port, 366 struct moschip_port *data) 367 { 368 usb_set_serial_port_data(port, (void *)data); 369 } 370 371 static inline struct moschip_port *mos7840_get_port_private(struct 372 usb_serial_port 373 *port) 374 { 375 return (struct moschip_port *)usb_get_serial_port_data(port); 376 } 377 378 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 379 { 380 struct moschip_port *mos7840_port; 381 struct async_icount *icount; 382 mos7840_port = port; 383 icount = &mos7840_port->icount; 384 if (new_msr & 385 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 386 MOS_MSR_DELTA_CD)) { 387 icount = &mos7840_port->icount; 388 389 /* update input line counters */ 390 if (new_msr & MOS_MSR_DELTA_CTS) { 391 icount->cts++; 392 smp_wmb(); 393 } 394 if (new_msr & MOS_MSR_DELTA_DSR) { 395 icount->dsr++; 396 smp_wmb(); 397 } 398 if (new_msr & MOS_MSR_DELTA_CD) { 399 icount->dcd++; 400 smp_wmb(); 401 } 402 if (new_msr & MOS_MSR_DELTA_RI) { 403 icount->rng++; 404 smp_wmb(); 405 } 406 } 407 } 408 409 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 410 { 411 struct async_icount *icount; 412 413 dbg("%s - %02x", __func__, new_lsr); 414 415 if (new_lsr & SERIAL_LSR_BI) { 416 /* 417 * Parity and Framing errors only count if they 418 * occur exclusive of a break being 419 * received. 420 */ 421 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 422 } 423 424 /* update input line counters */ 425 icount = &port->icount; 426 if (new_lsr & SERIAL_LSR_BI) { 427 icount->brk++; 428 smp_wmb(); 429 } 430 if (new_lsr & SERIAL_LSR_OE) { 431 icount->overrun++; 432 smp_wmb(); 433 } 434 if (new_lsr & SERIAL_LSR_PE) { 435 icount->parity++; 436 smp_wmb(); 437 } 438 if (new_lsr & SERIAL_LSR_FE) { 439 icount->frame++; 440 smp_wmb(); 441 } 442 } 443 444 /************************************************************************/ 445 /************************************************************************/ 446 /* U S B C A L L B A C K F U N C T I O N S */ 447 /* U S B C A L L B A C K F U N C T I O N S */ 448 /************************************************************************/ 449 /************************************************************************/ 450 451 static void mos7840_control_callback(struct urb *urb) 452 { 453 unsigned char *data; 454 struct moschip_port *mos7840_port; 455 __u8 regval = 0x0; 456 int result = 0; 457 int status = urb->status; 458 459 mos7840_port = urb->context; 460 461 switch (status) { 462 case 0: 463 /* success */ 464 break; 465 case -ECONNRESET: 466 case -ENOENT: 467 case -ESHUTDOWN: 468 /* this urb is terminated, clean up */ 469 dbg("%s - urb shutting down with status: %d", __func__, 470 status); 471 return; 472 default: 473 dbg("%s - nonzero urb status received: %d", __func__, 474 status); 475 goto exit; 476 } 477 478 dbg("%s urb buffer size is %d", __func__, urb->actual_length); 479 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__, 480 mos7840_port->MsrLsr, mos7840_port->port_num); 481 data = urb->transfer_buffer; 482 regval = (__u8) data[0]; 483 dbg("%s data is %x", __func__, regval); 484 if (mos7840_port->MsrLsr == 0) 485 mos7840_handle_new_msr(mos7840_port, regval); 486 else if (mos7840_port->MsrLsr == 1) 487 mos7840_handle_new_lsr(mos7840_port, regval); 488 489 exit: 490 spin_lock(&mos7840_port->pool_lock); 491 if (!mos7840_port->zombie) 492 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 493 spin_unlock(&mos7840_port->pool_lock); 494 if (result) { 495 dev_err(&urb->dev->dev, 496 "%s - Error %d submitting interrupt urb\n", 497 __func__, result); 498 } 499 } 500 501 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 502 __u16 *val) 503 { 504 struct usb_device *dev = mcs->port->serial->dev; 505 struct usb_ctrlrequest *dr = mcs->dr; 506 unsigned char *buffer = mcs->ctrl_buf; 507 int ret; 508 509 dr->bRequestType = MCS_RD_RTYPE; 510 dr->bRequest = MCS_RDREQ; 511 dr->wValue = cpu_to_le16(Wval); /* 0 */ 512 dr->wIndex = cpu_to_le16(reg); 513 dr->wLength = cpu_to_le16(2); 514 515 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 516 (unsigned char *)dr, buffer, 2, 517 mos7840_control_callback, mcs); 518 mcs->control_urb->transfer_buffer_length = 2; 519 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 520 return ret; 521 } 522 523 /***************************************************************************** 524 * mos7840_interrupt_callback 525 * this is the callback function for when we have received data on the 526 * interrupt endpoint. 527 *****************************************************************************/ 528 529 static void mos7840_interrupt_callback(struct urb *urb) 530 { 531 int result; 532 int length; 533 struct moschip_port *mos7840_port; 534 struct usb_serial *serial; 535 __u16 Data; 536 unsigned char *data; 537 __u8 sp[5], st; 538 int i, rv = 0; 539 __u16 wval, wreg = 0; 540 int status = urb->status; 541 542 dbg("%s", " : Entering"); 543 544 switch (status) { 545 case 0: 546 /* success */ 547 break; 548 case -ECONNRESET: 549 case -ENOENT: 550 case -ESHUTDOWN: 551 /* this urb is terminated, clean up */ 552 dbg("%s - urb shutting down with status: %d", __func__, 553 status); 554 return; 555 default: 556 dbg("%s - nonzero urb status received: %d", __func__, 557 status); 558 goto exit; 559 } 560 561 length = urb->actual_length; 562 data = urb->transfer_buffer; 563 564 serial = urb->context; 565 566 /* Moschip get 5 bytes 567 * Byte 1 IIR Port 1 (port.number is 0) 568 * Byte 2 IIR Port 2 (port.number is 1) 569 * Byte 3 IIR Port 3 (port.number is 2) 570 * Byte 4 IIR Port 4 (port.number is 3) 571 * Byte 5 FIFO status for both */ 572 573 if (length && length > 5) { 574 dbg("%s", "Wrong data !!!"); 575 return; 576 } 577 578 sp[0] = (__u8) data[0]; 579 sp[1] = (__u8) data[1]; 580 sp[2] = (__u8) data[2]; 581 sp[3] = (__u8) data[3]; 582 st = (__u8) data[4]; 583 584 for (i = 0; i < serial->num_ports; i++) { 585 mos7840_port = mos7840_get_port_private(serial->port[i]); 586 wval = 587 (((__u16) serial->port[i]->number - 588 (__u16) (serial->minor)) + 1) << 8; 589 if (mos7840_port->open) { 590 if (sp[i] & 0x01) { 591 dbg("SP%d No Interrupt !!!", i); 592 } else { 593 switch (sp[i] & 0x0f) { 594 case SERIAL_IIR_RLS: 595 dbg("Serial Port %d: Receiver status error or ", i); 596 dbg("address bit detected in 9-bit mode"); 597 mos7840_port->MsrLsr = 1; 598 wreg = LINE_STATUS_REGISTER; 599 break; 600 case SERIAL_IIR_MS: 601 dbg("Serial Port %d: Modem status change", i); 602 mos7840_port->MsrLsr = 0; 603 wreg = MODEM_STATUS_REGISTER; 604 break; 605 } 606 spin_lock(&mos7840_port->pool_lock); 607 if (!mos7840_port->zombie) { 608 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 609 } else { 610 spin_unlock(&mos7840_port->pool_lock); 611 return; 612 } 613 spin_unlock(&mos7840_port->pool_lock); 614 } 615 } 616 } 617 if (!(rv < 0)) 618 /* the completion handler for the control urb will resubmit */ 619 return; 620 exit: 621 result = usb_submit_urb(urb, GFP_ATOMIC); 622 if (result) { 623 dev_err(&urb->dev->dev, 624 "%s - Error %d submitting interrupt urb\n", 625 __func__, result); 626 } 627 } 628 629 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 630 const char *function) 631 { 632 if (!port) { 633 dbg("%s - port == NULL", function); 634 return -1; 635 } 636 if (!port->serial) { 637 dbg("%s - port->serial == NULL", function); 638 return -1; 639 } 640 641 return 0; 642 } 643 644 /* Inline functions to check the sanity of a pointer that is passed to us */ 645 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 646 const char *function) 647 { 648 if (!serial) { 649 dbg("%s - serial == NULL", function); 650 return -1; 651 } 652 if (!serial->type) { 653 dbg("%s - serial->type == NULL!", function); 654 return -1; 655 } 656 657 return 0; 658 } 659 660 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 661 const char *function) 662 { 663 /* if no port was specified, or it fails a paranoia check */ 664 if (!port || 665 mos7840_port_paranoia_check(port, function) || 666 mos7840_serial_paranoia_check(port->serial, function)) { 667 /* then say that we don't have a valid usb_serial thing, 668 * which will end up genrating -ENODEV return values */ 669 return NULL; 670 } 671 672 return port->serial; 673 } 674 675 /***************************************************************************** 676 * mos7840_bulk_in_callback 677 * this is the callback function for when we have received data on the 678 * bulk in endpoint. 679 *****************************************************************************/ 680 681 static void mos7840_bulk_in_callback(struct urb *urb) 682 { 683 int retval; 684 unsigned char *data; 685 struct usb_serial *serial; 686 struct usb_serial_port *port; 687 struct moschip_port *mos7840_port; 688 struct tty_struct *tty; 689 int status = urb->status; 690 691 mos7840_port = urb->context; 692 if (!mos7840_port) { 693 dbg("%s", "NULL mos7840_port pointer"); 694 mos7840_port->read_urb_busy = false; 695 return; 696 } 697 698 if (status) { 699 dbg("nonzero read bulk status received: %d", status); 700 mos7840_port->read_urb_busy = false; 701 return; 702 } 703 704 port = (struct usb_serial_port *)mos7840_port->port; 705 if (mos7840_port_paranoia_check(port, __func__)) { 706 dbg("%s", "Port Paranoia failed"); 707 mos7840_port->read_urb_busy = false; 708 return; 709 } 710 711 serial = mos7840_get_usb_serial(port, __func__); 712 if (!serial) { 713 dbg("%s", "Bad serial pointer"); 714 mos7840_port->read_urb_busy = false; 715 return; 716 } 717 718 dbg("%s", "Entering... "); 719 720 data = urb->transfer_buffer; 721 722 dbg("%s", "Entering ..........."); 723 724 if (urb->actual_length) { 725 tty = tty_port_tty_get(&mos7840_port->port->port); 726 if (tty) { 727 tty_buffer_request_room(tty, urb->actual_length); 728 tty_insert_flip_string(tty, data, urb->actual_length); 729 dbg(" %s ", data); 730 tty_flip_buffer_push(tty); 731 tty_kref_put(tty); 732 } 733 mos7840_port->icount.rx += urb->actual_length; 734 smp_wmb(); 735 dbg("mos7840_port->icount.rx is %d:", 736 mos7840_port->icount.rx); 737 } 738 739 if (!mos7840_port->read_urb) { 740 dbg("%s", "URB KILLED !!!"); 741 mos7840_port->read_urb_busy = false; 742 return; 743 } 744 745 746 mos7840_port->read_urb->dev = serial->dev; 747 748 mos7840_port->read_urb_busy = true; 749 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 750 751 if (retval) { 752 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); 753 mos7840_port->read_urb_busy = false; 754 } 755 } 756 757 /***************************************************************************** 758 * mos7840_bulk_out_data_callback 759 * this is the callback function for when we have finished sending 760 * serial data on the bulk out endpoint. 761 *****************************************************************************/ 762 763 static void mos7840_bulk_out_data_callback(struct urb *urb) 764 { 765 struct moschip_port *mos7840_port; 766 struct tty_struct *tty; 767 int status = urb->status; 768 int i; 769 770 mos7840_port = urb->context; 771 spin_lock(&mos7840_port->pool_lock); 772 for (i = 0; i < NUM_URBS; i++) { 773 if (urb == mos7840_port->write_urb_pool[i]) { 774 mos7840_port->busy[i] = 0; 775 break; 776 } 777 } 778 spin_unlock(&mos7840_port->pool_lock); 779 780 if (status) { 781 dbg("nonzero write bulk status received:%d", status); 782 return; 783 } 784 785 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { 786 dbg("%s", "Port Paranoia failed"); 787 return; 788 } 789 790 dbg("%s", "Entering ........."); 791 792 tty = tty_port_tty_get(&mos7840_port->port->port); 793 if (tty && mos7840_port->open) 794 tty_wakeup(tty); 795 tty_kref_put(tty); 796 797 } 798 799 /************************************************************************/ 800 /* 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 */ 801 /************************************************************************/ 802 #ifdef MCSSerialProbe 803 static int mos7840_serial_probe(struct usb_serial *serial, 804 const struct usb_device_id *id) 805 { 806 807 /*need to implement the mode_reg reading and updating\ 808 structures usb_serial_ device_type\ 809 (i.e num_ports, num_bulkin,bulkout etc) */ 810 /* Also we can update the changes attach */ 811 return 1; 812 } 813 #endif 814 815 /***************************************************************************** 816 * mos7840_open 817 * this function is called by the tty driver when a port is opened 818 * If successful, we return 0 819 * Otherwise we return a negative error number. 820 *****************************************************************************/ 821 822 static int mos7840_open(struct tty_struct *tty, 823 struct usb_serial_port *port, struct file *filp) 824 { 825 int response; 826 int j; 827 struct usb_serial *serial; 828 struct urb *urb; 829 __u16 Data; 830 int status; 831 struct moschip_port *mos7840_port; 832 struct moschip_port *port0; 833 834 dbg ("%s enter", __func__); 835 836 if (mos7840_port_paranoia_check(port, __func__)) { 837 dbg("%s", "Port Paranoia failed"); 838 return -ENODEV; 839 } 840 841 serial = port->serial; 842 843 if (mos7840_serial_paranoia_check(serial, __func__)) { 844 dbg("%s", "Serial Paranoia failed"); 845 return -ENODEV; 846 } 847 848 mos7840_port = mos7840_get_port_private(port); 849 port0 = mos7840_get_port_private(serial->port[0]); 850 851 if (mos7840_port == NULL || port0 == NULL) 852 return -ENODEV; 853 854 usb_clear_halt(serial->dev, port->write_urb->pipe); 855 usb_clear_halt(serial->dev, port->read_urb->pipe); 856 port0->open_ports++; 857 858 /* Initialising the write urb pool */ 859 for (j = 0; j < NUM_URBS; ++j) { 860 urb = usb_alloc_urb(0, GFP_KERNEL); 861 mos7840_port->write_urb_pool[j] = urb; 862 863 if (urb == NULL) { 864 dev_err(&port->dev, "No more urbs???\n"); 865 continue; 866 } 867 868 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 869 GFP_KERNEL); 870 if (!urb->transfer_buffer) { 871 usb_free_urb(urb); 872 mos7840_port->write_urb_pool[j] = NULL; 873 dev_err(&port->dev, 874 "%s-out of memory for urb buffers.\n", 875 __func__); 876 continue; 877 } 878 } 879 880 /***************************************************************************** 881 * Initialize MCS7840 -- Write Init values to corresponding Registers 882 * 883 * Register Index 884 * 1 : IER 885 * 2 : FCR 886 * 3 : LCR 887 * 4 : MCR 888 * 889 * 0x08 : SP1/2 Control Reg 890 *****************************************************************************/ 891 892 /* NEED to check the following Block */ 893 894 Data = 0x0; 895 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 896 if (status < 0) { 897 dbg("Reading Spreg failed"); 898 return -1; 899 } 900 Data |= 0x80; 901 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 902 if (status < 0) { 903 dbg("writing Spreg failed"); 904 return -1; 905 } 906 907 Data &= ~0x80; 908 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 909 if (status < 0) { 910 dbg("writing Spreg failed"); 911 return -1; 912 } 913 /* End of block to be checked */ 914 915 Data = 0x0; 916 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 917 &Data); 918 if (status < 0) { 919 dbg("Reading Controlreg failed"); 920 return -1; 921 } 922 Data |= 0x08; /* Driver done bit */ 923 Data |= 0x20; /* rx_disable */ 924 status = mos7840_set_reg_sync(port, 925 mos7840_port->ControlRegOffset, Data); 926 if (status < 0) { 927 dbg("writing Controlreg failed"); 928 return -1; 929 } 930 /* do register settings here */ 931 /* Set all regs to the device default values. */ 932 /*********************************** 933 * First Disable all interrupts. 934 ***********************************/ 935 Data = 0x00; 936 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 937 if (status < 0) { 938 dbg("disabling interrupts failed"); 939 return -1; 940 } 941 /* Set FIFO_CONTROL_REGISTER to the default value */ 942 Data = 0x00; 943 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 944 if (status < 0) { 945 dbg("Writing FIFO_CONTROL_REGISTER failed"); 946 return -1; 947 } 948 949 Data = 0xcf; 950 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 951 if (status < 0) { 952 dbg("Writing FIFO_CONTROL_REGISTER failed"); 953 return -1; 954 } 955 956 Data = 0x03; 957 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 958 mos7840_port->shadowLCR = Data; 959 960 Data = 0x0b; 961 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 962 mos7840_port->shadowMCR = Data; 963 964 Data = 0x00; 965 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 966 mos7840_port->shadowLCR = Data; 967 968 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 969 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 970 971 Data = 0x0c; 972 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 973 974 Data = 0x0; 975 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 976 977 Data = 0x00; 978 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 979 980 Data = Data & ~SERIAL_LCR_DLAB; 981 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 982 mos7840_port->shadowLCR = Data; 983 984 /* clearing Bulkin and Bulkout Fifo */ 985 Data = 0x0; 986 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 987 988 Data = Data | 0x0c; 989 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 990 991 Data = Data & ~0x0c; 992 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 993 /* Finally enable all interrupts */ 994 Data = 0x0c; 995 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 996 997 /* clearing rx_disable */ 998 Data = 0x0; 999 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1000 &Data); 1001 Data = Data & ~0x20; 1002 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1003 Data); 1004 1005 /* rx_negate */ 1006 Data = 0x0; 1007 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1008 &Data); 1009 Data = Data | 0x10; 1010 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1011 Data); 1012 1013 /* Check to see if we've set up our endpoint info yet * 1014 * (can't set it up in mos7840_startup as the structures * 1015 * were not set up at that time.) */ 1016 if (port0->open_ports == 1) { 1017 if (serial->port[0]->interrupt_in_buffer == NULL) { 1018 /* set up interrupt urb */ 1019 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1020 serial->dev, 1021 usb_rcvintpipe(serial->dev, 1022 serial->port[0]->interrupt_in_endpointAddress), 1023 serial->port[0]->interrupt_in_buffer, 1024 serial->port[0]->interrupt_in_urb-> 1025 transfer_buffer_length, 1026 mos7840_interrupt_callback, 1027 serial, 1028 serial->port[0]->interrupt_in_urb->interval); 1029 1030 /* start interrupt read for mos7840 * 1031 * will continue as long as mos7840 is connected */ 1032 1033 response = 1034 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1035 GFP_KERNEL); 1036 if (response) { 1037 dev_err(&port->dev, "%s - Error %d submitting " 1038 "interrupt urb\n", __func__, response); 1039 } 1040 1041 } 1042 1043 } 1044 1045 /* see if we've set up our endpoint info yet * 1046 * (can't set it up in mos7840_startup as the * 1047 * structures were not set up at that time.) */ 1048 1049 dbg("port number is %d", port->number); 1050 dbg("serial number is %d", port->serial->minor); 1051 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); 1052 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); 1053 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); 1054 dbg("port's number in the device is %d", mos7840_port->port_num); 1055 mos7840_port->read_urb = port->read_urb; 1056 1057 /* set up our bulk in urb */ 1058 1059 usb_fill_bulk_urb(mos7840_port->read_urb, 1060 serial->dev, 1061 usb_rcvbulkpipe(serial->dev, 1062 port->bulk_in_endpointAddress), 1063 port->bulk_in_buffer, 1064 mos7840_port->read_urb->transfer_buffer_length, 1065 mos7840_bulk_in_callback, mos7840_port); 1066 1067 dbg("mos7840_open: bulkin endpoint is %d", 1068 port->bulk_in_endpointAddress); 1069 mos7840_port->read_urb_busy = true; 1070 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1071 if (response) { 1072 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1073 __func__, response); 1074 mos7840_port->read_urb_busy = false; 1075 } 1076 1077 /* initialize our wait queues */ 1078 init_waitqueue_head(&mos7840_port->wait_chase); 1079 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1080 1081 /* initialize our icount structure */ 1082 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1083 1084 /* initialize our port settings */ 1085 /* Must set to enable ints! */ 1086 mos7840_port->shadowMCR = MCR_MASTER_IE; 1087 /* send a open port command */ 1088 mos7840_port->open = 1; 1089 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1090 mos7840_port->icount.tx = 0; 1091 mos7840_port->icount.rx = 0; 1092 1093 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", 1094 serial, mos7840_port, port); 1095 1096 dbg ("%s leave", __func__); 1097 1098 return 0; 1099 1100 } 1101 1102 /***************************************************************************** 1103 * mos7840_chars_in_buffer 1104 * this function is called by the tty driver when it wants to know how many 1105 * bytes of data we currently have outstanding in the port (data that has 1106 * been written, but hasn't made it out the port yet) 1107 * If successful, we return the number of bytes left to be written in the 1108 * system, 1109 * Otherwise we return zero. 1110 *****************************************************************************/ 1111 1112 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1113 { 1114 struct usb_serial_port *port = tty->driver_data; 1115 int i; 1116 int chars = 0; 1117 unsigned long flags; 1118 struct moschip_port *mos7840_port; 1119 1120 dbg("%s", " mos7840_chars_in_buffer:entering ..........."); 1121 1122 if (mos7840_port_paranoia_check(port, __func__)) { 1123 dbg("%s", "Invalid port"); 1124 return 0; 1125 } 1126 1127 mos7840_port = mos7840_get_port_private(port); 1128 if (mos7840_port == NULL) { 1129 dbg("%s", "mos7840_break:leaving ..........."); 1130 return 0; 1131 } 1132 1133 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1134 for (i = 0; i < NUM_URBS; ++i) 1135 if (mos7840_port->busy[i]) 1136 chars += URB_TRANSFER_BUFFER_SIZE; 1137 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1138 dbg("%s - returns %d", __func__, chars); 1139 return chars; 1140 1141 } 1142 1143 /***************************************************************************** 1144 * mos7840_close 1145 * this function is called by the tty driver when a port is closed 1146 *****************************************************************************/ 1147 1148 static void mos7840_close(struct usb_serial_port *port) 1149 { 1150 struct usb_serial *serial; 1151 struct moschip_port *mos7840_port; 1152 struct moschip_port *port0; 1153 int j; 1154 __u16 Data; 1155 1156 dbg("%s", "mos7840_close:entering..."); 1157 1158 if (mos7840_port_paranoia_check(port, __func__)) { 1159 dbg("%s", "Port Paranoia failed"); 1160 return; 1161 } 1162 1163 serial = mos7840_get_usb_serial(port, __func__); 1164 if (!serial) { 1165 dbg("%s", "Serial Paranoia failed"); 1166 return; 1167 } 1168 1169 mos7840_port = mos7840_get_port_private(port); 1170 port0 = mos7840_get_port_private(serial->port[0]); 1171 1172 if (mos7840_port == NULL || port0 == NULL) 1173 return; 1174 1175 for (j = 0; j < NUM_URBS; ++j) 1176 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1177 1178 /* Freeing Write URBs */ 1179 for (j = 0; j < NUM_URBS; ++j) { 1180 if (mos7840_port->write_urb_pool[j]) { 1181 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1182 kfree(mos7840_port->write_urb_pool[j]-> 1183 transfer_buffer); 1184 1185 usb_free_urb(mos7840_port->write_urb_pool[j]); 1186 } 1187 } 1188 1189 /* While closing port, shutdown all bulk read, write * 1190 * and interrupt read if they exists */ 1191 if (serial->dev) { 1192 if (mos7840_port->write_urb) { 1193 dbg("%s", "Shutdown bulk write"); 1194 usb_kill_urb(mos7840_port->write_urb); 1195 } 1196 if (mos7840_port->read_urb) { 1197 dbg("%s", "Shutdown bulk read"); 1198 usb_kill_urb(mos7840_port->read_urb); 1199 mos7840_port->read_urb_busy = false; 1200 } 1201 if ((&mos7840_port->control_urb)) { 1202 dbg("%s", "Shutdown control read"); 1203 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1204 } 1205 } 1206 /* if(mos7840_port->ctrl_buf != NULL) */ 1207 /* kfree(mos7840_port->ctrl_buf); */ 1208 port0->open_ports--; 1209 dbg("mos7840_num_open_ports in close%d:in port%d", 1210 port0->open_ports, port->number); 1211 if (port0->open_ports == 0) { 1212 if (serial->port[0]->interrupt_in_urb) { 1213 dbg("%s", "Shutdown interrupt_in_urb"); 1214 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1215 } 1216 } 1217 1218 if (mos7840_port->write_urb) { 1219 /* if this urb had a transfer buffer already (old tx) free it */ 1220 if (mos7840_port->write_urb->transfer_buffer != NULL) 1221 kfree(mos7840_port->write_urb->transfer_buffer); 1222 usb_free_urb(mos7840_port->write_urb); 1223 } 1224 1225 Data = 0x0; 1226 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1227 1228 Data = 0x00; 1229 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1230 1231 mos7840_port->open = 0; 1232 1233 dbg("%s", "Leaving ............"); 1234 } 1235 1236 /************************************************************************ 1237 * 1238 * mos7840_block_until_chase_response 1239 * 1240 * This function will block the close until one of the following: 1241 * 1. Response to our Chase comes from mos7840 1242 * 2. A timeout of 10 seconds without activity has expired 1243 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1244 * 1245 ************************************************************************/ 1246 1247 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1248 struct moschip_port *mos7840_port) 1249 { 1250 int timeout = 1 * HZ; 1251 int wait = 10; 1252 int count; 1253 1254 while (1) { 1255 count = mos7840_chars_in_buffer(tty); 1256 1257 /* Check for Buffer status */ 1258 if (count <= 0) 1259 return; 1260 1261 /* Block the thread for a while */ 1262 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1263 timeout); 1264 /* No activity.. count down section */ 1265 wait--; 1266 if (wait == 0) { 1267 dbg("%s - TIMEOUT", __func__); 1268 return; 1269 } else { 1270 /* Reset timeout value back to seconds */ 1271 wait = 10; 1272 } 1273 } 1274 1275 } 1276 1277 /***************************************************************************** 1278 * mos7840_break 1279 * this function sends a break to the port 1280 *****************************************************************************/ 1281 static void mos7840_break(struct tty_struct *tty, int break_state) 1282 { 1283 struct usb_serial_port *port = tty->driver_data; 1284 unsigned char data; 1285 struct usb_serial *serial; 1286 struct moschip_port *mos7840_port; 1287 1288 dbg("%s", "Entering ..........."); 1289 dbg("mos7840_break: Start"); 1290 1291 if (mos7840_port_paranoia_check(port, __func__)) { 1292 dbg("%s", "Port Paranoia failed"); 1293 return; 1294 } 1295 1296 serial = mos7840_get_usb_serial(port, __func__); 1297 if (!serial) { 1298 dbg("%s", "Serial Paranoia failed"); 1299 return; 1300 } 1301 1302 mos7840_port = mos7840_get_port_private(port); 1303 1304 if (mos7840_port == NULL) 1305 return; 1306 1307 if (serial->dev) 1308 /* flush and block until tx is empty */ 1309 mos7840_block_until_chase_response(tty, mos7840_port); 1310 1311 if (break_state == -1) 1312 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1313 else 1314 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1315 1316 /* FIXME: no locking on shadowLCR anywhere in driver */ 1317 mos7840_port->shadowLCR = data; 1318 dbg("mcs7840_break mos7840_port->shadowLCR is %x", 1319 mos7840_port->shadowLCR); 1320 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1321 mos7840_port->shadowLCR); 1322 1323 return; 1324 } 1325 1326 /***************************************************************************** 1327 * mos7840_write_room 1328 * this function is called by the tty driver when it wants to know how many 1329 * bytes of data we can accept for a specific port. 1330 * If successful, we return the amount of room that we have for this port 1331 * Otherwise we return a negative error number. 1332 *****************************************************************************/ 1333 1334 static int mos7840_write_room(struct tty_struct *tty) 1335 { 1336 struct usb_serial_port *port = tty->driver_data; 1337 int i; 1338 int room = 0; 1339 unsigned long flags; 1340 struct moschip_port *mos7840_port; 1341 1342 dbg("%s", " mos7840_write_room:entering ..........."); 1343 1344 if (mos7840_port_paranoia_check(port, __func__)) { 1345 dbg("%s", "Invalid port"); 1346 dbg("%s", " mos7840_write_room:leaving ..........."); 1347 return -1; 1348 } 1349 1350 mos7840_port = mos7840_get_port_private(port); 1351 if (mos7840_port == NULL) { 1352 dbg("%s", "mos7840_break:leaving ..........."); 1353 return -1; 1354 } 1355 1356 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1357 for (i = 0; i < NUM_URBS; ++i) { 1358 if (!mos7840_port->busy[i]) 1359 room += URB_TRANSFER_BUFFER_SIZE; 1360 } 1361 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1362 1363 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1364 dbg("%s - returns %d", __func__, room); 1365 return room; 1366 1367 } 1368 1369 /***************************************************************************** 1370 * mos7840_write 1371 * this function is called by the tty driver when data should be written to 1372 * the port. 1373 * If successful, we return the number of bytes written, otherwise we 1374 * return a negative error number. 1375 *****************************************************************************/ 1376 1377 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1378 const unsigned char *data, int count) 1379 { 1380 int status; 1381 int i; 1382 int bytes_sent = 0; 1383 int transfer_size; 1384 unsigned long flags; 1385 1386 struct moschip_port *mos7840_port; 1387 struct usb_serial *serial; 1388 struct urb *urb; 1389 /* __u16 Data; */ 1390 const unsigned char *current_position = data; 1391 unsigned char *data1; 1392 dbg("%s", "entering ..........."); 1393 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1394 mos7840_port->shadowLCR); */ 1395 1396 #ifdef NOTMOS7840 1397 Data = 0x00; 1398 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1399 mos7840_port->shadowLCR = Data; 1400 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); 1401 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1402 mos7840_port->shadowLCR); 1403 1404 /* Data = 0x03; */ 1405 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1406 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1407 1408 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1409 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1410 1411 /* Data = 0x0c; */ 1412 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1413 Data = 0x00; 1414 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1415 dbg("mos7840_write:DLL value is %x", Data); 1416 1417 Data = 0x0; 1418 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1419 dbg("mos7840_write:DLM value is %x", Data); 1420 1421 Data = Data & ~SERIAL_LCR_DLAB; 1422 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1423 mos7840_port->shadowLCR); 1424 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1425 #endif 1426 1427 if (mos7840_port_paranoia_check(port, __func__)) { 1428 dbg("%s", "Port Paranoia failed"); 1429 return -1; 1430 } 1431 1432 serial = port->serial; 1433 if (mos7840_serial_paranoia_check(serial, __func__)) { 1434 dbg("%s", "Serial Paranoia failed"); 1435 return -1; 1436 } 1437 1438 mos7840_port = mos7840_get_port_private(port); 1439 if (mos7840_port == NULL) { 1440 dbg("%s", "mos7840_port is NULL"); 1441 return -1; 1442 } 1443 1444 /* try to find a free urb in the list */ 1445 urb = NULL; 1446 1447 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1448 for (i = 0; i < NUM_URBS; ++i) { 1449 if (!mos7840_port->busy[i]) { 1450 mos7840_port->busy[i] = 1; 1451 urb = mos7840_port->write_urb_pool[i]; 1452 dbg("URB:%d", i); 1453 break; 1454 } 1455 } 1456 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1457 1458 if (urb == NULL) { 1459 dbg("%s - no more free urbs", __func__); 1460 goto exit; 1461 } 1462 1463 if (urb->transfer_buffer == NULL) { 1464 urb->transfer_buffer = 1465 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1466 1467 if (urb->transfer_buffer == NULL) { 1468 dev_err(&port->dev, "%s no more kernel memory...\n", 1469 __func__); 1470 goto exit; 1471 } 1472 } 1473 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1474 1475 memcpy(urb->transfer_buffer, current_position, transfer_size); 1476 1477 /* fill urb with data and submit */ 1478 usb_fill_bulk_urb(urb, 1479 serial->dev, 1480 usb_sndbulkpipe(serial->dev, 1481 port->bulk_out_endpointAddress), 1482 urb->transfer_buffer, 1483 transfer_size, 1484 mos7840_bulk_out_data_callback, mos7840_port); 1485 1486 data1 = urb->transfer_buffer; 1487 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); 1488 1489 /* send it down the pipe */ 1490 status = usb_submit_urb(urb, GFP_ATOMIC); 1491 1492 if (status) { 1493 mos7840_port->busy[i] = 0; 1494 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 1495 "with status = %d\n", __func__, status); 1496 bytes_sent = status; 1497 goto exit; 1498 } 1499 bytes_sent = transfer_size; 1500 mos7840_port->icount.tx += transfer_size; 1501 smp_wmb(); 1502 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); 1503 exit: 1504 return bytes_sent; 1505 1506 } 1507 1508 /***************************************************************************** 1509 * mos7840_throttle 1510 * this function is called by the tty driver when it wants to stop the data 1511 * being read from the port. 1512 *****************************************************************************/ 1513 1514 static void mos7840_throttle(struct tty_struct *tty) 1515 { 1516 struct usb_serial_port *port = tty->driver_data; 1517 struct moschip_port *mos7840_port; 1518 int status; 1519 1520 if (mos7840_port_paranoia_check(port, __func__)) { 1521 dbg("%s", "Invalid port"); 1522 return; 1523 } 1524 1525 dbg("- port %d", port->number); 1526 1527 mos7840_port = mos7840_get_port_private(port); 1528 1529 if (mos7840_port == NULL) 1530 return; 1531 1532 if (!mos7840_port->open) { 1533 dbg("%s", "port not opened"); 1534 return; 1535 } 1536 1537 dbg("%s", "Entering .........."); 1538 1539 /* if we are implementing XON/XOFF, send the stop character */ 1540 if (I_IXOFF(tty)) { 1541 unsigned char stop_char = STOP_CHAR(tty); 1542 status = mos7840_write(tty, port, &stop_char, 1); 1543 if (status <= 0) 1544 return; 1545 } 1546 /* if we are implementing RTS/CTS, toggle that line */ 1547 if (tty->termios->c_cflag & CRTSCTS) { 1548 mos7840_port->shadowMCR &= ~MCR_RTS; 1549 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1550 mos7840_port->shadowMCR); 1551 if (status < 0) 1552 return; 1553 } 1554 1555 return; 1556 } 1557 1558 /***************************************************************************** 1559 * mos7840_unthrottle 1560 * this function is called by the tty driver when it wants to resume 1561 * the data being read from the port (called after mos7840_throttle is 1562 * called) 1563 *****************************************************************************/ 1564 static void mos7840_unthrottle(struct tty_struct *tty) 1565 { 1566 struct usb_serial_port *port = tty->driver_data; 1567 int status; 1568 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1569 1570 if (mos7840_port_paranoia_check(port, __func__)) { 1571 dbg("%s", "Invalid port"); 1572 return; 1573 } 1574 1575 if (mos7840_port == NULL) 1576 return; 1577 1578 if (!mos7840_port->open) { 1579 dbg("%s - port not opened", __func__); 1580 return; 1581 } 1582 1583 dbg("%s", "Entering .........."); 1584 1585 /* if we are implementing XON/XOFF, send the start character */ 1586 if (I_IXOFF(tty)) { 1587 unsigned char start_char = START_CHAR(tty); 1588 status = mos7840_write(tty, port, &start_char, 1); 1589 if (status <= 0) 1590 return; 1591 } 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 1603 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) 1604 { 1605 struct usb_serial_port *port = tty->driver_data; 1606 struct moschip_port *mos7840_port; 1607 unsigned int result; 1608 __u16 msr; 1609 __u16 mcr; 1610 int status; 1611 mos7840_port = mos7840_get_port_private(port); 1612 1613 dbg("%s - port %d", __func__, port->number); 1614 1615 if (mos7840_port == NULL) 1616 return -ENODEV; 1617 1618 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1619 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1620 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1621 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1622 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1623 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1624 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1625 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1626 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1627 1628 dbg("%s - 0x%04X", __func__, result); 1629 1630 return result; 1631 } 1632 1633 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, 1634 unsigned int set, unsigned int clear) 1635 { 1636 struct usb_serial_port *port = tty->driver_data; 1637 struct moschip_port *mos7840_port; 1638 unsigned int mcr; 1639 int status; 1640 1641 dbg("%s - port %d", __func__, port->number); 1642 1643 mos7840_port = mos7840_get_port_private(port); 1644 1645 if (mos7840_port == NULL) 1646 return -ENODEV; 1647 1648 /* FIXME: What locks the port registers ? */ 1649 mcr = mos7840_port->shadowMCR; 1650 if (clear & TIOCM_RTS) 1651 mcr &= ~MCR_RTS; 1652 if (clear & TIOCM_DTR) 1653 mcr &= ~MCR_DTR; 1654 if (clear & TIOCM_LOOP) 1655 mcr &= ~MCR_LOOPBACK; 1656 1657 if (set & TIOCM_RTS) 1658 mcr |= MCR_RTS; 1659 if (set & TIOCM_DTR) 1660 mcr |= MCR_DTR; 1661 if (set & TIOCM_LOOP) 1662 mcr |= MCR_LOOPBACK; 1663 1664 mos7840_port->shadowMCR = mcr; 1665 1666 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1667 if (status < 0) { 1668 dbg("setting MODEM_CONTROL_REGISTER Failed"); 1669 return status; 1670 } 1671 1672 return 0; 1673 } 1674 1675 /***************************************************************************** 1676 * mos7840_calc_baud_rate_divisor 1677 * this function calculates the proper baud rate divisor for the specified 1678 * baud rate. 1679 *****************************************************************************/ 1680 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1681 __u16 *clk_sel_val) 1682 { 1683 1684 dbg("%s - %d", __func__, baudRate); 1685 1686 if (baudRate <= 115200) { 1687 *divisor = 115200 / baudRate; 1688 *clk_sel_val = 0x0; 1689 } 1690 if ((baudRate > 115200) && (baudRate <= 230400)) { 1691 *divisor = 230400 / baudRate; 1692 *clk_sel_val = 0x10; 1693 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1694 *divisor = 403200 / baudRate; 1695 *clk_sel_val = 0x20; 1696 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1697 *divisor = 460800 / baudRate; 1698 *clk_sel_val = 0x30; 1699 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1700 *divisor = 806400 / baudRate; 1701 *clk_sel_val = 0x40; 1702 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1703 *divisor = 921600 / baudRate; 1704 *clk_sel_val = 0x50; 1705 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1706 *divisor = 1572864 / baudRate; 1707 *clk_sel_val = 0x60; 1708 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1709 *divisor = 3145728 / baudRate; 1710 *clk_sel_val = 0x70; 1711 } 1712 return 0; 1713 1714 #ifdef NOTMCS7840 1715 1716 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1717 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1718 *divisor = mos7840_divisor_table[i].Divisor; 1719 return 0; 1720 } 1721 } 1722 1723 /* After trying for all the standard baud rates * 1724 * Try calculating the divisor for this baud rate */ 1725 1726 if (baudrate > 75 && baudrate < 230400) { 1727 /* get the divisor */ 1728 custom = (__u16) (230400L / baudrate); 1729 1730 /* Check for round off */ 1731 round1 = (__u16) (2304000L / baudrate); 1732 round = (__u16) (round1 - (custom * 10)); 1733 if (round > 4) 1734 custom++; 1735 *divisor = custom; 1736 1737 dbg(" Baud %d = %d", baudrate, custom); 1738 return 0; 1739 } 1740 1741 dbg("%s", " Baud calculation Failed..."); 1742 return -1; 1743 #endif 1744 } 1745 1746 /***************************************************************************** 1747 * mos7840_send_cmd_write_baud_rate 1748 * this function sends the proper command to change the baud rate of the 1749 * specified port. 1750 *****************************************************************************/ 1751 1752 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1753 int baudRate) 1754 { 1755 int divisor = 0; 1756 int status; 1757 __u16 Data; 1758 unsigned char number; 1759 __u16 clk_sel_val; 1760 struct usb_serial_port *port; 1761 1762 if (mos7840_port == NULL) 1763 return -1; 1764 1765 port = (struct usb_serial_port *)mos7840_port->port; 1766 if (mos7840_port_paranoia_check(port, __func__)) { 1767 dbg("%s", "Invalid port"); 1768 return -1; 1769 } 1770 1771 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1772 dbg("%s", "Invalid Serial"); 1773 return -1; 1774 } 1775 1776 dbg("%s", "Entering .........."); 1777 1778 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1779 1780 dbg("%s - port = %d, baud = %d", __func__, 1781 mos7840_port->port->number, baudRate); 1782 /* reset clk_uart_sel in spregOffset */ 1783 if (baudRate > 115200) { 1784 #ifdef HW_flow_control 1785 /* NOTE: need to see the pther register to modify */ 1786 /* setting h/w flow control bit to 1 */ 1787 Data = 0x2b; 1788 mos7840_port->shadowMCR = Data; 1789 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1790 Data); 1791 if (status < 0) { 1792 dbg("Writing spreg failed in set_serial_baud"); 1793 return -1; 1794 } 1795 #endif 1796 1797 } else { 1798 #ifdef HW_flow_control 1799 / *setting h/w flow control bit to 0 */ 1800 Data = 0xb; 1801 mos7840_port->shadowMCR = Data; 1802 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1803 Data); 1804 if (status < 0) { 1805 dbg("Writing spreg failed in set_serial_baud"); 1806 return -1; 1807 } 1808 #endif 1809 1810 } 1811 1812 if (1) { /* baudRate <= 115200) */ 1813 clk_sel_val = 0x0; 1814 Data = 0x0; 1815 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1816 &clk_sel_val); 1817 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1818 &Data); 1819 if (status < 0) { 1820 dbg("reading spreg failed in set_serial_baud"); 1821 return -1; 1822 } 1823 Data = (Data & 0x8f) | clk_sel_val; 1824 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1825 Data); 1826 if (status < 0) { 1827 dbg("Writing spreg failed in set_serial_baud"); 1828 return -1; 1829 } 1830 /* Calculate the Divisor */ 1831 1832 if (status) { 1833 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1834 return status; 1835 } 1836 /* Enable access to divisor latch */ 1837 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1838 mos7840_port->shadowLCR = Data; 1839 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1840 1841 /* Write the divisor */ 1842 Data = (unsigned char)(divisor & 0xff); 1843 dbg("set_serial_baud Value to write DLL is %x", Data); 1844 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1845 1846 Data = (unsigned char)((divisor & 0xff00) >> 8); 1847 dbg("set_serial_baud Value to write DLM is %x", Data); 1848 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1849 1850 /* Disable access to divisor latch */ 1851 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1852 mos7840_port->shadowLCR = Data; 1853 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1854 1855 } 1856 return status; 1857 } 1858 1859 /***************************************************************************** 1860 * mos7840_change_port_settings 1861 * This routine is called to set the UART on the device to match 1862 * the specified new settings. 1863 *****************************************************************************/ 1864 1865 static void mos7840_change_port_settings(struct tty_struct *tty, 1866 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1867 { 1868 int baud; 1869 unsigned cflag; 1870 unsigned iflag; 1871 __u8 lData; 1872 __u8 lParity; 1873 __u8 lStop; 1874 int status; 1875 __u16 Data; 1876 struct usb_serial_port *port; 1877 struct usb_serial *serial; 1878 1879 if (mos7840_port == NULL) 1880 return; 1881 1882 port = (struct usb_serial_port *)mos7840_port->port; 1883 1884 if (mos7840_port_paranoia_check(port, __func__)) { 1885 dbg("%s", "Invalid port"); 1886 return; 1887 } 1888 1889 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1890 dbg("%s", "Invalid Serial"); 1891 return; 1892 } 1893 1894 serial = port->serial; 1895 1896 dbg("%s - port %d", __func__, mos7840_port->port->number); 1897 1898 if (!mos7840_port->open) { 1899 dbg("%s - port not opened", __func__); 1900 return; 1901 } 1902 1903 dbg("%s", "Entering .........."); 1904 1905 lData = LCR_BITS_8; 1906 lStop = LCR_STOP_1; 1907 lParity = LCR_PAR_NONE; 1908 1909 cflag = tty->termios->c_cflag; 1910 iflag = tty->termios->c_iflag; 1911 1912 /* Change the number of bits */ 1913 if (cflag & CSIZE) { 1914 switch (cflag & CSIZE) { 1915 case CS5: 1916 lData = LCR_BITS_5; 1917 break; 1918 1919 case CS6: 1920 lData = LCR_BITS_6; 1921 break; 1922 1923 case CS7: 1924 lData = LCR_BITS_7; 1925 break; 1926 default: 1927 case CS8: 1928 lData = LCR_BITS_8; 1929 break; 1930 } 1931 } 1932 /* Change the Parity bit */ 1933 if (cflag & PARENB) { 1934 if (cflag & PARODD) { 1935 lParity = LCR_PAR_ODD; 1936 dbg("%s - parity = odd", __func__); 1937 } else { 1938 lParity = LCR_PAR_EVEN; 1939 dbg("%s - parity = even", __func__); 1940 } 1941 1942 } else { 1943 dbg("%s - parity = none", __func__); 1944 } 1945 1946 if (cflag & CMSPAR) 1947 lParity = lParity | 0x20; 1948 1949 /* Change the Stop bit */ 1950 if (cflag & CSTOPB) { 1951 lStop = LCR_STOP_2; 1952 dbg("%s - stop bits = 2", __func__); 1953 } else { 1954 lStop = LCR_STOP_1; 1955 dbg("%s - stop bits = 1", __func__); 1956 } 1957 1958 /* Update the LCR with the correct value */ 1959 mos7840_port->shadowLCR &= 1960 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1961 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1962 1963 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", 1964 mos7840_port->shadowLCR); 1965 /* Disable Interrupts */ 1966 Data = 0x00; 1967 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1968 1969 Data = 0x00; 1970 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1971 1972 Data = 0xcf; 1973 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1974 1975 /* Send the updated LCR value to the mos7840 */ 1976 Data = mos7840_port->shadowLCR; 1977 1978 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1979 1980 Data = 0x00b; 1981 mos7840_port->shadowMCR = Data; 1982 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1983 Data = 0x00b; 1984 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1985 1986 /* set up the MCR register and send it to the mos7840 */ 1987 1988 mos7840_port->shadowMCR = MCR_MASTER_IE; 1989 if (cflag & CBAUD) 1990 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1991 1992 if (cflag & CRTSCTS) 1993 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1994 else 1995 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1996 1997 Data = mos7840_port->shadowMCR; 1998 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1999 2000 /* Determine divisor based on baud rate */ 2001 baud = tty_get_baud_rate(tty); 2002 2003 if (!baud) { 2004 /* pick a default, any default... */ 2005 dbg("%s", "Picked default baud..."); 2006 baud = 9600; 2007 } 2008 2009 dbg("%s - baud rate = %d", __func__, baud); 2010 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2011 2012 /* Enable Interrupts */ 2013 Data = 0x0c; 2014 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2015 2016 if (mos7840_port->read_urb_busy == false) { 2017 mos7840_port->read_urb->dev = serial->dev; 2018 mos7840_port->read_urb_busy = true; 2019 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2020 if (status) { 2021 dbg("usb_submit_urb(read bulk) failed, status = %d", 2022 status); 2023 mos7840_port->read_urb_busy = false; 2024 } 2025 } 2026 wake_up(&mos7840_port->delta_msr_wait); 2027 mos7840_port->delta_msr_cond = 1; 2028 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", 2029 mos7840_port->shadowLCR); 2030 2031 return; 2032 } 2033 2034 /***************************************************************************** 2035 * mos7840_set_termios 2036 * this function is called by the tty driver when it wants to change 2037 * the termios structure 2038 *****************************************************************************/ 2039 2040 static void mos7840_set_termios(struct tty_struct *tty, 2041 struct usb_serial_port *port, 2042 struct ktermios *old_termios) 2043 { 2044 int status; 2045 unsigned int cflag; 2046 struct usb_serial *serial; 2047 struct moschip_port *mos7840_port; 2048 dbg("mos7840_set_termios: START"); 2049 if (mos7840_port_paranoia_check(port, __func__)) { 2050 dbg("%s", "Invalid port"); 2051 return; 2052 } 2053 2054 serial = port->serial; 2055 2056 if (mos7840_serial_paranoia_check(serial, __func__)) { 2057 dbg("%s", "Invalid Serial"); 2058 return; 2059 } 2060 2061 mos7840_port = mos7840_get_port_private(port); 2062 2063 if (mos7840_port == NULL) 2064 return; 2065 2066 if (!mos7840_port->open) { 2067 dbg("%s - port not opened", __func__); 2068 return; 2069 } 2070 2071 dbg("%s", "setting termios - "); 2072 2073 cflag = tty->termios->c_cflag; 2074 2075 dbg("%s - clfag %08x iflag %08x", __func__, 2076 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2077 dbg("%s - old clfag %08x old iflag %08x", __func__, 2078 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2079 dbg("%s - port %d", __func__, port->number); 2080 2081 /* change the port settings to the new ones specified */ 2082 2083 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2084 2085 if (!mos7840_port->read_urb) { 2086 dbg("%s", "URB KILLED !!!!!"); 2087 return; 2088 } 2089 2090 if (mos7840_port->read_urb_busy == false) { 2091 mos7840_port->read_urb->dev = serial->dev; 2092 mos7840_port->read_urb_busy = true; 2093 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2094 if (status) { 2095 dbg("usb_submit_urb(read bulk) failed, status = %d", 2096 status); 2097 mos7840_port->read_urb_busy = false; 2098 } 2099 } 2100 return; 2101 } 2102 2103 /***************************************************************************** 2104 * mos7840_get_lsr_info - get line status register info 2105 * 2106 * Purpose: Let user call ioctl() to get info when the UART physically 2107 * is emptied. On bus types like RS485, the transmitter must 2108 * release the bus after transmitting. This must be done when 2109 * the transmit shift register is empty, not be done when the 2110 * transmit holding register is empty. This functionality 2111 * allows an RS485 driver to be written in user space. 2112 *****************************************************************************/ 2113 2114 static int mos7840_get_lsr_info(struct tty_struct *tty, 2115 unsigned int __user *value) 2116 { 2117 int count; 2118 unsigned int result = 0; 2119 2120 count = mos7840_chars_in_buffer(tty); 2121 if (count == 0) { 2122 dbg("%s -- Empty", __func__); 2123 result = TIOCSER_TEMT; 2124 } 2125 2126 if (copy_to_user(value, &result, sizeof(int))) 2127 return -EFAULT; 2128 return 0; 2129 } 2130 2131 /***************************************************************************** 2132 * mos7840_set_modem_info 2133 * function to set modem info 2134 *****************************************************************************/ 2135 2136 /* FIXME: Should be using the model control hooks */ 2137 2138 static int mos7840_set_modem_info(struct moschip_port *mos7840_port, 2139 unsigned int cmd, unsigned int __user *value) 2140 { 2141 unsigned int mcr; 2142 unsigned int arg; 2143 __u16 Data; 2144 int status; 2145 struct usb_serial_port *port; 2146 2147 if (mos7840_port == NULL) 2148 return -1; 2149 2150 port = (struct usb_serial_port *)mos7840_port->port; 2151 if (mos7840_port_paranoia_check(port, __func__)) { 2152 dbg("%s", "Invalid port"); 2153 return -1; 2154 } 2155 2156 mcr = mos7840_port->shadowMCR; 2157 2158 if (copy_from_user(&arg, value, sizeof(int))) 2159 return -EFAULT; 2160 2161 switch (cmd) { 2162 case TIOCMBIS: 2163 if (arg & TIOCM_RTS) 2164 mcr |= MCR_RTS; 2165 if (arg & TIOCM_DTR) 2166 mcr |= MCR_RTS; 2167 if (arg & TIOCM_LOOP) 2168 mcr |= MCR_LOOPBACK; 2169 break; 2170 2171 case TIOCMBIC: 2172 if (arg & TIOCM_RTS) 2173 mcr &= ~MCR_RTS; 2174 if (arg & TIOCM_DTR) 2175 mcr &= ~MCR_RTS; 2176 if (arg & TIOCM_LOOP) 2177 mcr &= ~MCR_LOOPBACK; 2178 break; 2179 2180 case TIOCMSET: 2181 /* turn off the RTS and DTR and LOOPBACK 2182 * and then only turn on what was asked to */ 2183 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); 2184 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); 2185 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); 2186 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); 2187 break; 2188 } 2189 2190 lock_kernel(); 2191 mos7840_port->shadowMCR = mcr; 2192 2193 Data = mos7840_port->shadowMCR; 2194 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2195 unlock_kernel(); 2196 if (status < 0) { 2197 dbg("setting MODEM_CONTROL_REGISTER Failed"); 2198 return -1; 2199 } 2200 2201 return 0; 2202 } 2203 2204 /***************************************************************************** 2205 * mos7840_get_modem_info 2206 * function to get modem info 2207 *****************************************************************************/ 2208 2209 static int mos7840_get_modem_info(struct moschip_port *mos7840_port, 2210 unsigned int __user *value) 2211 { 2212 unsigned int result = 0; 2213 __u16 msr; 2214 unsigned int mcr = mos7840_port->shadowMCR; 2215 mos7840_get_uart_reg(mos7840_port->port, 2216 MODEM_STATUS_REGISTER, &msr); 2217 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ 2218 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ 2219 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ 2220 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ 2221 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ 2222 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ 2223 2224 dbg("%s -- %x", __func__, result); 2225 2226 if (copy_to_user(value, &result, sizeof(int))) 2227 return -EFAULT; 2228 return 0; 2229 } 2230 2231 /***************************************************************************** 2232 * mos7840_get_serial_info 2233 * function to get information about serial port 2234 *****************************************************************************/ 2235 2236 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2237 struct serial_struct __user *retinfo) 2238 { 2239 struct serial_struct tmp; 2240 2241 if (mos7840_port == NULL) 2242 return -1; 2243 2244 if (!retinfo) 2245 return -EFAULT; 2246 2247 memset(&tmp, 0, sizeof(tmp)); 2248 2249 tmp.type = PORT_16550A; 2250 tmp.line = mos7840_port->port->serial->minor; 2251 tmp.port = mos7840_port->port->number; 2252 tmp.irq = 0; 2253 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2254 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2255 tmp.baud_base = 9600; 2256 tmp.close_delay = 5 * HZ; 2257 tmp.closing_wait = 30 * HZ; 2258 2259 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2260 return -EFAULT; 2261 return 0; 2262 } 2263 2264 /***************************************************************************** 2265 * SerialIoctl 2266 * this function handles any ioctl calls to the driver 2267 *****************************************************************************/ 2268 2269 static int mos7840_ioctl(struct tty_struct *tty, struct file *file, 2270 unsigned int cmd, unsigned long arg) 2271 { 2272 struct usb_serial_port *port = tty->driver_data; 2273 void __user *argp = (void __user *)arg; 2274 struct moschip_port *mos7840_port; 2275 2276 struct async_icount cnow; 2277 struct async_icount cprev; 2278 struct serial_icounter_struct icount; 2279 int mosret = 0; 2280 2281 if (mos7840_port_paranoia_check(port, __func__)) { 2282 dbg("%s", "Invalid port"); 2283 return -1; 2284 } 2285 2286 mos7840_port = mos7840_get_port_private(port); 2287 2288 if (mos7840_port == NULL) 2289 return -1; 2290 2291 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2292 2293 switch (cmd) { 2294 /* return number of bytes available */ 2295 2296 case TIOCSERGETLSR: 2297 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2298 return mos7840_get_lsr_info(tty, argp); 2299 return 0; 2300 2301 /* FIXME: use the modem hooks and remove this */ 2302 case TIOCMBIS: 2303 case TIOCMBIC: 2304 case TIOCMSET: 2305 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__, 2306 port->number); 2307 mosret = 2308 mos7840_set_modem_info(mos7840_port, cmd, argp); 2309 return mosret; 2310 2311 case TIOCMGET: 2312 dbg("%s (%d) TIOCMGET", __func__, port->number); 2313 return mos7840_get_modem_info(mos7840_port, argp); 2314 2315 case TIOCGSERIAL: 2316 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2317 return mos7840_get_serial_info(mos7840_port, argp); 2318 2319 case TIOCSSERIAL: 2320 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2321 break; 2322 2323 case TIOCMIWAIT: 2324 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2325 cprev = mos7840_port->icount; 2326 while (1) { 2327 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2328 mos7840_port->delta_msr_cond = 0; 2329 wait_event_interruptible(mos7840_port->delta_msr_wait, 2330 (mos7840_port-> 2331 delta_msr_cond == 1)); 2332 2333 /* see if a signal did it */ 2334 if (signal_pending(current)) 2335 return -ERESTARTSYS; 2336 cnow = mos7840_port->icount; 2337 smp_rmb(); 2338 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2339 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2340 return -EIO; /* no change => error */ 2341 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2342 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2343 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2344 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2345 return 0; 2346 } 2347 cprev = cnow; 2348 } 2349 /* NOTREACHED */ 2350 break; 2351 2352 case TIOCGICOUNT: 2353 cnow = mos7840_port->icount; 2354 smp_rmb(); 2355 icount.cts = cnow.cts; 2356 icount.dsr = cnow.dsr; 2357 icount.rng = cnow.rng; 2358 icount.dcd = cnow.dcd; 2359 icount.rx = cnow.rx; 2360 icount.tx = cnow.tx; 2361 icount.frame = cnow.frame; 2362 icount.overrun = cnow.overrun; 2363 icount.parity = cnow.parity; 2364 icount.brk = cnow.brk; 2365 icount.buf_overrun = cnow.buf_overrun; 2366 2367 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2368 port->number, icount.rx, icount.tx); 2369 if (copy_to_user(argp, &icount, sizeof(icount))) 2370 return -EFAULT; 2371 return 0; 2372 default: 2373 break; 2374 } 2375 return -ENOIOCTLCMD; 2376 } 2377 2378 static int mos7840_calc_num_ports(struct usb_serial *serial) 2379 { 2380 int mos7840_num_ports = 0; 2381 2382 dbg("numberofendpoints: cur %d, alt %d", 2383 (int)serial->interface->cur_altsetting->desc.bNumEndpoints, 2384 (int)serial->interface->altsetting->desc.bNumEndpoints); 2385 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2386 mos7840_num_ports = serial->num_ports = 2; 2387 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2388 serial->num_bulk_in = 4; 2389 serial->num_bulk_out = 4; 2390 mos7840_num_ports = serial->num_ports = 4; 2391 } 2392 dbg ("mos7840_num_ports = %d", mos7840_num_ports); 2393 return mos7840_num_ports; 2394 } 2395 2396 /**************************************************************************** 2397 * mos7840_startup 2398 ****************************************************************************/ 2399 2400 static int mos7840_startup(struct usb_serial *serial) 2401 { 2402 struct moschip_port *mos7840_port; 2403 struct usb_device *dev; 2404 int i, status; 2405 2406 __u16 Data; 2407 dbg("%s", "mos7840_startup :Entering.........."); 2408 2409 if (!serial) { 2410 dbg("%s", "Invalid Handler"); 2411 return -1; 2412 } 2413 2414 dev = serial->dev; 2415 2416 dbg("%s", "Entering..."); 2417 dbg ("mos7840_startup: serial = %p", serial); 2418 2419 /* we set up the pointers to the endpoints in the mos7840_open * 2420 * function, as the structures aren't created yet. */ 2421 2422 /* set up port private structures */ 2423 for (i = 0; i < serial->num_ports; ++i) { 2424 dbg ("mos7840_startup: configuring port %d............", i); 2425 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2426 if (mos7840_port == NULL) { 2427 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2428 status = -ENOMEM; 2429 i--; /* don't follow NULL pointer cleaning up */ 2430 goto error; 2431 } 2432 2433 /* Initialize all port interrupt end point to port 0 int 2434 * endpoint. Our device has only one interrupt end point 2435 * common to all port */ 2436 2437 mos7840_port->port = serial->port[i]; 2438 mos7840_set_port_private(serial->port[i], mos7840_port); 2439 spin_lock_init(&mos7840_port->pool_lock); 2440 2441 /* minor is not initialised until later by 2442 * usb-serial.c:get_free_serial() and cannot therefore be used 2443 * to index device instances */ 2444 mos7840_port->port_num = i + 1; 2445 dbg ("serial->port[i]->number = %d", serial->port[i]->number); 2446 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); 2447 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); 2448 dbg ("serial->minor = %d", serial->minor); 2449 2450 if (mos7840_port->port_num == 1) { 2451 mos7840_port->SpRegOffset = 0x0; 2452 mos7840_port->ControlRegOffset = 0x1; 2453 mos7840_port->DcrRegOffset = 0x4; 2454 } else if ((mos7840_port->port_num == 2) 2455 && (serial->num_ports == 4)) { 2456 mos7840_port->SpRegOffset = 0x8; 2457 mos7840_port->ControlRegOffset = 0x9; 2458 mos7840_port->DcrRegOffset = 0x16; 2459 } else if ((mos7840_port->port_num == 2) 2460 && (serial->num_ports == 2)) { 2461 mos7840_port->SpRegOffset = 0xa; 2462 mos7840_port->ControlRegOffset = 0xb; 2463 mos7840_port->DcrRegOffset = 0x19; 2464 } else if ((mos7840_port->port_num == 3) 2465 && (serial->num_ports == 4)) { 2466 mos7840_port->SpRegOffset = 0xa; 2467 mos7840_port->ControlRegOffset = 0xb; 2468 mos7840_port->DcrRegOffset = 0x19; 2469 } else if ((mos7840_port->port_num == 4) 2470 && (serial->num_ports == 4)) { 2471 mos7840_port->SpRegOffset = 0xc; 2472 mos7840_port->ControlRegOffset = 0xd; 2473 mos7840_port->DcrRegOffset = 0x1c; 2474 } 2475 mos7840_dump_serial_port(mos7840_port); 2476 mos7840_set_port_private(serial->port[i], mos7840_port); 2477 2478 /* enable rx_disable bit in control register */ 2479 status = mos7840_get_reg_sync(serial->port[i], 2480 mos7840_port->ControlRegOffset, &Data); 2481 if (status < 0) { 2482 dbg("Reading ControlReg failed status-0x%x", status); 2483 break; 2484 } else 2485 dbg("ControlReg Reading success val is %x, status%d", 2486 Data, status); 2487 Data |= 0x08; /* setting driver done bit */ 2488 Data |= 0x04; /* sp1_bit to have cts change reflect in 2489 modem status reg */ 2490 2491 /* Data |= 0x20; //rx_disable bit */ 2492 status = mos7840_set_reg_sync(serial->port[i], 2493 mos7840_port->ControlRegOffset, Data); 2494 if (status < 0) { 2495 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); 2496 break; 2497 } else 2498 dbg("ControlReg Writing success(rx_disable) status%d", 2499 status); 2500 2501 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2502 and 0x24 in DCR3 */ 2503 Data = 0x01; 2504 status = mos7840_set_reg_sync(serial->port[i], 2505 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2506 if (status < 0) { 2507 dbg("Writing DCR0 failed status-0x%x", status); 2508 break; 2509 } else 2510 dbg("DCR0 Writing success status%d", status); 2511 2512 Data = 0x05; 2513 status = mos7840_set_reg_sync(serial->port[i], 2514 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2515 if (status < 0) { 2516 dbg("Writing DCR1 failed status-0x%x", status); 2517 break; 2518 } else 2519 dbg("DCR1 Writing success status%d", status); 2520 2521 Data = 0x24; 2522 status = mos7840_set_reg_sync(serial->port[i], 2523 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2524 if (status < 0) { 2525 dbg("Writing DCR2 failed status-0x%x", status); 2526 break; 2527 } else 2528 dbg("DCR2 Writing success status%d", status); 2529 2530 /* write values in clkstart0x0 and clkmulti 0x20 */ 2531 Data = 0x0; 2532 status = mos7840_set_reg_sync(serial->port[i], 2533 CLK_START_VALUE_REGISTER, Data); 2534 if (status < 0) { 2535 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); 2536 break; 2537 } else 2538 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); 2539 2540 Data = 0x20; 2541 status = mos7840_set_reg_sync(serial->port[i], 2542 CLK_MULTI_REGISTER, Data); 2543 if (status < 0) { 2544 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", 2545 status); 2546 goto error; 2547 } else 2548 dbg("CLK_MULTI_REGISTER Writing success status%d", 2549 status); 2550 2551 /* write value 0x0 to scratchpad register */ 2552 Data = 0x00; 2553 status = mos7840_set_uart_reg(serial->port[i], 2554 SCRATCH_PAD_REGISTER, Data); 2555 if (status < 0) { 2556 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", 2557 status); 2558 break; 2559 } else 2560 dbg("SCRATCH_PAD_REGISTER Writing success status%d", 2561 status); 2562 2563 /* Zero Length flag register */ 2564 if ((mos7840_port->port_num != 1) 2565 && (serial->num_ports == 2)) { 2566 2567 Data = 0xff; 2568 status = mos7840_set_reg_sync(serial->port[i], 2569 (__u16) (ZLP_REG1 + 2570 ((__u16)mos7840_port->port_num)), Data); 2571 dbg("ZLIP offset %x", 2572 (__u16) (ZLP_REG1 + 2573 ((__u16) mos7840_port->port_num))); 2574 if (status < 0) { 2575 dbg("Writing ZLP_REG%d failed status-0x%x", 2576 i + 2, status); 2577 break; 2578 } else 2579 dbg("ZLP_REG%d Writing success status%d", 2580 i + 2, status); 2581 } else { 2582 Data = 0xff; 2583 status = mos7840_set_reg_sync(serial->port[i], 2584 (__u16) (ZLP_REG1 + 2585 ((__u16)mos7840_port->port_num) - 0x1), Data); 2586 dbg("ZLIP offset %x", 2587 (__u16) (ZLP_REG1 + 2588 ((__u16) mos7840_port->port_num) - 0x1)); 2589 if (status < 0) { 2590 dbg("Writing ZLP_REG%d failed status-0x%x", 2591 i + 1, status); 2592 break; 2593 } else 2594 dbg("ZLP_REG%d Writing success status%d", 2595 i + 1, status); 2596 2597 } 2598 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2599 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2600 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2601 GFP_KERNEL); 2602 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2603 !mos7840_port->dr) { 2604 status = -ENOMEM; 2605 goto error; 2606 } 2607 } 2608 dbg ("mos7840_startup: all ports configured..........."); 2609 2610 /* Zero Length flag enable */ 2611 Data = 0x0f; 2612 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2613 if (status < 0) { 2614 dbg("Writing ZLP_REG5 failed status-0x%x", status); 2615 goto error; 2616 } else 2617 dbg("ZLP_REG5 Writing success status%d", status); 2618 2619 /* setting configuration feature to one */ 2620 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2621 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2622 return 0; 2623 error: 2624 for (/* nothing */; i >= 0; i--) { 2625 mos7840_port = mos7840_get_port_private(serial->port[i]); 2626 2627 kfree(mos7840_port->dr); 2628 kfree(mos7840_port->ctrl_buf); 2629 usb_free_urb(mos7840_port->control_urb); 2630 kfree(mos7840_port); 2631 serial->port[i] = NULL; 2632 } 2633 return status; 2634 } 2635 2636 /**************************************************************************** 2637 * mos7840_disconnect 2638 * This function is called whenever the device is removed from the usb bus. 2639 ****************************************************************************/ 2640 2641 static void mos7840_disconnect(struct usb_serial *serial) 2642 { 2643 int i; 2644 unsigned long flags; 2645 struct moschip_port *mos7840_port; 2646 dbg("%s", " disconnect :entering.........."); 2647 2648 if (!serial) { 2649 dbg("%s", "Invalid Handler"); 2650 return; 2651 } 2652 2653 /* check for the ports to be closed,close the ports and disconnect */ 2654 2655 /* free private structure allocated for serial port * 2656 * stop reads and writes on all ports */ 2657 2658 for (i = 0; i < serial->num_ports; ++i) { 2659 mos7840_port = mos7840_get_port_private(serial->port[i]); 2660 dbg ("mos7840_port %d = %p", i, mos7840_port); 2661 if (mos7840_port) { 2662 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2663 mos7840_port->zombie = 1; 2664 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2665 usb_kill_urb(mos7840_port->control_urb); 2666 } 2667 } 2668 2669 dbg("%s", "Thank u :: "); 2670 2671 } 2672 2673 /**************************************************************************** 2674 * mos7840_release 2675 * This function is called when the usb_serial structure is freed. 2676 ****************************************************************************/ 2677 2678 static void mos7840_release(struct usb_serial *serial) 2679 { 2680 int i; 2681 struct moschip_port *mos7840_port; 2682 dbg("%s", " release :entering.........."); 2683 2684 if (!serial) { 2685 dbg("%s", "Invalid Handler"); 2686 return; 2687 } 2688 2689 /* check for the ports to be closed,close the ports and disconnect */ 2690 2691 /* free private structure allocated for serial port * 2692 * stop reads and writes on all ports */ 2693 2694 for (i = 0; i < serial->num_ports; ++i) { 2695 mos7840_port = mos7840_get_port_private(serial->port[i]); 2696 dbg("mos7840_port %d = %p", i, mos7840_port); 2697 if (mos7840_port) { 2698 kfree(mos7840_port->ctrl_buf); 2699 kfree(mos7840_port->dr); 2700 kfree(mos7840_port); 2701 } 2702 } 2703 2704 dbg("%s", "Thank u :: "); 2705 2706 } 2707 2708 static struct usb_driver io_driver = { 2709 .name = "mos7840", 2710 .probe = usb_serial_probe, 2711 .disconnect = usb_serial_disconnect, 2712 .id_table = moschip_id_table_combined, 2713 .no_dynamic_id = 1, 2714 }; 2715 2716 static struct usb_serial_driver moschip7840_4port_device = { 2717 .driver = { 2718 .owner = THIS_MODULE, 2719 .name = "mos7840", 2720 }, 2721 .description = DRIVER_DESC, 2722 .usb_driver = &io_driver, 2723 .id_table = moschip_port_id_table, 2724 .num_ports = 4, 2725 .open = mos7840_open, 2726 .close = mos7840_close, 2727 .write = mos7840_write, 2728 .write_room = mos7840_write_room, 2729 .chars_in_buffer = mos7840_chars_in_buffer, 2730 .throttle = mos7840_throttle, 2731 .unthrottle = mos7840_unthrottle, 2732 .calc_num_ports = mos7840_calc_num_ports, 2733 #ifdef MCSSerialProbe 2734 .probe = mos7840_serial_probe, 2735 #endif 2736 .ioctl = mos7840_ioctl, 2737 .set_termios = mos7840_set_termios, 2738 .break_ctl = mos7840_break, 2739 .tiocmget = mos7840_tiocmget, 2740 .tiocmset = mos7840_tiocmset, 2741 .attach = mos7840_startup, 2742 .disconnect = mos7840_disconnect, 2743 .release = mos7840_release, 2744 .read_bulk_callback = mos7840_bulk_in_callback, 2745 .read_int_callback = mos7840_interrupt_callback, 2746 }; 2747 2748 /**************************************************************************** 2749 * moschip7840_init 2750 * This is called by the module subsystem, or on startup to initialize us 2751 ****************************************************************************/ 2752 static int __init moschip7840_init(void) 2753 { 2754 int retval; 2755 2756 dbg("%s", " mos7840_init :entering.........."); 2757 2758 /* Register with the usb serial */ 2759 retval = usb_serial_register(&moschip7840_4port_device); 2760 2761 if (retval) 2762 goto failed_port_device_register; 2763 2764 dbg("%s", "Entering..."); 2765 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2766 DRIVER_DESC "\n"); 2767 2768 /* Register with the usb */ 2769 retval = usb_register(&io_driver); 2770 if (retval == 0) { 2771 dbg("%s", "Leaving..."); 2772 return 0; 2773 } 2774 usb_serial_deregister(&moschip7840_4port_device); 2775 failed_port_device_register: 2776 return retval; 2777 } 2778 2779 /**************************************************************************** 2780 * moschip7840_exit 2781 * Called when the driver is about to be unloaded. 2782 ****************************************************************************/ 2783 static void __exit moschip7840_exit(void) 2784 { 2785 2786 dbg("%s", " mos7840_exit :entering.........."); 2787 2788 usb_deregister(&io_driver); 2789 2790 usb_serial_deregister(&moschip7840_4port_device); 2791 2792 dbg("%s", "Entering..."); 2793 } 2794 2795 module_init(moschip7840_init); 2796 module_exit(moschip7840_exit); 2797 2798 /* Module information */ 2799 MODULE_DESCRIPTION(DRIVER_DESC); 2800 MODULE_LICENSE("GPL"); 2801 2802 module_param(debug, bool, S_IRUGO | S_IWUSR); 2803 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2804