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