1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 15 * 16 * Clean ups from Moschip version and a few ioctl implementations by: 17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 18 * 19 * Originally based on drivers/usb/serial/io_edgeport.c which is: 20 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 22 * 23 */ 24 25 #include <linux/kernel.h> 26 #include <linux/errno.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/tty.h> 30 #include <linux/tty_driver.h> 31 #include <linux/tty_flip.h> 32 #include <linux/module.h> 33 #include <linux/serial.h> 34 #include <linux/usb.h> 35 #include <linux/usb/serial.h> 36 #include <linux/uaccess.h> 37 38 /* 39 * Version Information 40 */ 41 #define DRIVER_VERSION "1.3.2" 42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 43 44 /* 45 * 16C50 UART register defines 46 */ 47 48 #define LCR_BITS_5 0x00 /* 5 bits/char */ 49 #define LCR_BITS_6 0x01 /* 6 bits/char */ 50 #define LCR_BITS_7 0x02 /* 7 bits/char */ 51 #define LCR_BITS_8 0x03 /* 8 bits/char */ 52 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 53 54 #define LCR_STOP_1 0x00 /* 1 stop bit */ 55 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 56 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 57 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 58 59 #define LCR_PAR_NONE 0x00 /* No parity */ 60 #define LCR_PAR_ODD 0x08 /* Odd parity */ 61 #define LCR_PAR_EVEN 0x18 /* Even parity */ 62 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 63 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 64 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 65 66 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 68 69 #define MCR_DTR 0x01 /* Assert DTR */ 70 #define MCR_RTS 0x02 /* Assert RTS */ 71 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 72 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 73 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 74 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 75 76 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 77 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 78 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 79 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 80 81 /* 82 * Defines used for sending commands to port 83 */ 84 85 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */ 86 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */ 87 88 #define MOS_PORT1 0x0200 89 #define MOS_PORT2 0x0300 90 #define MOS_VENREG 0x0000 91 #define MOS_MAX_PORT 0x02 92 #define MOS_WRITE 0x0E 93 #define MOS_READ 0x0D 94 95 /* Requests */ 96 #define MCS_RD_RTYPE 0xC0 97 #define MCS_WR_RTYPE 0x40 98 #define MCS_RDREQ 0x0D 99 #define MCS_WRREQ 0x0E 100 #define MCS_CTRL_TIMEOUT 500 101 #define VENDOR_READ_LENGTH (0x01) 102 103 #define MAX_NAME_LEN 64 104 105 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 106 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 107 108 /* For higher baud Rates use TIOCEXBAUD */ 109 #define TIOCEXBAUD 0x5462 110 111 /* vendor id and device id defines */ 112 113 /* The native mos7840/7820 component */ 114 #define USB_VENDOR_ID_MOSCHIP 0x9710 115 #define MOSCHIP_DEVICE_ID_7840 0x7840 116 #define MOSCHIP_DEVICE_ID_7820 0x7820 117 /* The native component can have its vendor/device id's overridden 118 * in vendor-specific implementations. Such devices can be handled 119 * by making a change here, in moschip_port_id_table, and in 120 * moschip_id_table_combined 121 */ 122 #define USB_VENDOR_ID_BANDB 0x0856 123 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 124 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 125 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 126 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 127 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 128 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 129 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 130 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 131 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 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 const 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_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 195 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 196 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 197 {} /* terminating entry */ 198 }; 199 200 static const struct usb_device_id moschip_id_table_combined[] __devinitconst = { 201 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 202 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 208 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 209 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 210 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 211 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 212 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 213 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 214 {} /* terminating entry */ 215 }; 216 217 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); 218 219 /* This structure holds all of the local port information */ 220 221 struct moschip_port { 222 int port_num; /*Actual port number in the device(1,2,etc) */ 223 struct urb *write_urb; /* write URB for this port */ 224 struct urb *read_urb; /* read URB for this port */ 225 struct urb *int_urb; 226 __u8 shadowLCR; /* last LCR value received */ 227 __u8 shadowMCR; /* last MCR value received */ 228 char open; 229 char open_ports; 230 char zombie; 231 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 232 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 233 int delta_msr_cond; 234 struct async_icount icount; 235 struct usb_serial_port *port; /* loop back to the owner of this object */ 236 237 /* Offsets */ 238 __u8 SpRegOffset; 239 __u8 ControlRegOffset; 240 __u8 DcrRegOffset; 241 /* for processing control URBS in interrupt context */ 242 struct urb *control_urb; 243 struct usb_ctrlrequest *dr; 244 char *ctrl_buf; 245 int MsrLsr; 246 247 spinlock_t pool_lock; 248 struct urb *write_urb_pool[NUM_URBS]; 249 char busy[NUM_URBS]; 250 bool read_urb_busy; 251 }; 252 253 254 static int debug; 255 256 /* 257 * mos7840_set_reg_sync 258 * To set the Control register by calling usb_fill_control_urb function 259 * by passing usb_sndctrlpipe function as parameter. 260 */ 261 262 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 263 __u16 val) 264 { 265 struct usb_device *dev = port->serial->dev; 266 val = val & 0x00ff; 267 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val); 268 269 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 270 MCS_WR_RTYPE, val, reg, NULL, 0, 271 MOS_WDR_TIMEOUT); 272 } 273 274 /* 275 * mos7840_get_reg_sync 276 * To set the Uart register by calling usb_fill_control_urb function by 277 * passing usb_rcvctrlpipe function as parameter. 278 */ 279 280 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 281 __u16 *val) 282 { 283 struct usb_device *dev = port->serial->dev; 284 int ret = 0; 285 u8 *buf; 286 287 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 288 if (!buf) 289 return -ENOMEM; 290 291 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 292 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 293 MOS_WDR_TIMEOUT); 294 *val = buf[0]; 295 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); 296 297 kfree(buf); 298 return ret; 299 } 300 301 /* 302 * mos7840_set_uart_reg 303 * To set the Uart register by calling usb_fill_control_urb function by 304 * passing usb_sndctrlpipe function as parameter. 305 */ 306 307 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 308 __u16 val) 309 { 310 311 struct usb_device *dev = port->serial->dev; 312 val = val & 0x00ff; 313 /* For the UART control registers, the application number need 314 to be Or'ed */ 315 if (port->serial->num_ports == 4) { 316 val |= (((__u16) port->number - 317 (__u16) (port->serial->minor)) + 1) << 8; 318 dbg("mos7840_set_uart_reg application number is %x", val); 319 } else { 320 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 321 val |= (((__u16) port->number - 322 (__u16) (port->serial->minor)) + 1) << 8; 323 dbg("mos7840_set_uart_reg application number is %x", 324 val); 325 } else { 326 val |= 327 (((__u16) port->number - 328 (__u16) (port->serial->minor)) + 2) << 8; 329 dbg("mos7840_set_uart_reg application number is %x", 330 val); 331 } 332 } 333 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 334 MCS_WR_RTYPE, val, reg, NULL, 0, 335 MOS_WDR_TIMEOUT); 336 337 } 338 339 /* 340 * mos7840_get_uart_reg 341 * To set the Control register by calling usb_fill_control_urb function 342 * by passing usb_rcvctrlpipe function as parameter. 343 */ 344 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 345 __u16 *val) 346 { 347 struct usb_device *dev = port->serial->dev; 348 int ret = 0; 349 __u16 Wval; 350 u8 *buf; 351 352 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 353 if (!buf) 354 return -ENOMEM; 355 356 /* dbg("application number is %4x", 357 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ 358 /* Wval is same as application number */ 359 if (port->serial->num_ports == 4) { 360 Wval = 361 (((__u16) port->number - (__u16) (port->serial->minor)) + 362 1) << 8; 363 dbg("mos7840_get_uart_reg application number is %x", Wval); 364 } else { 365 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 366 Wval = (((__u16) port->number - 367 (__u16) (port->serial->minor)) + 1) << 8; 368 dbg("mos7840_get_uart_reg application number is %x", 369 Wval); 370 } else { 371 Wval = (((__u16) port->number - 372 (__u16) (port->serial->minor)) + 2) << 8; 373 dbg("mos7840_get_uart_reg application number is %x", 374 Wval); 375 } 376 } 377 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 378 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 379 MOS_WDR_TIMEOUT); 380 *val = buf[0]; 381 382 kfree(buf); 383 return ret; 384 } 385 386 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 387 { 388 389 dbg("***************************************"); 390 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset); 391 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset); 392 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset); 393 dbg("***************************************"); 394 395 } 396 397 /************************************************************************/ 398 /************************************************************************/ 399 /* I N T E R F A C E F U N C T I O N S */ 400 /* I N T E R F A C E F U N C T I O N S */ 401 /************************************************************************/ 402 /************************************************************************/ 403 404 static inline void mos7840_set_port_private(struct usb_serial_port *port, 405 struct moschip_port *data) 406 { 407 usb_set_serial_port_data(port, (void *)data); 408 } 409 410 static inline struct moschip_port *mos7840_get_port_private(struct 411 usb_serial_port 412 *port) 413 { 414 return (struct moschip_port *)usb_get_serial_port_data(port); 415 } 416 417 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 418 { 419 struct moschip_port *mos7840_port; 420 struct async_icount *icount; 421 mos7840_port = port; 422 icount = &mos7840_port->icount; 423 if (new_msr & 424 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 425 MOS_MSR_DELTA_CD)) { 426 icount = &mos7840_port->icount; 427 428 /* update input line counters */ 429 if (new_msr & MOS_MSR_DELTA_CTS) { 430 icount->cts++; 431 smp_wmb(); 432 } 433 if (new_msr & MOS_MSR_DELTA_DSR) { 434 icount->dsr++; 435 smp_wmb(); 436 } 437 if (new_msr & MOS_MSR_DELTA_CD) { 438 icount->dcd++; 439 smp_wmb(); 440 } 441 if (new_msr & MOS_MSR_DELTA_RI) { 442 icount->rng++; 443 smp_wmb(); 444 } 445 } 446 } 447 448 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 449 { 450 struct async_icount *icount; 451 452 dbg("%s - %02x", __func__, new_lsr); 453 454 if (new_lsr & SERIAL_LSR_BI) { 455 /* 456 * Parity and Framing errors only count if they 457 * occur exclusive of a break being 458 * received. 459 */ 460 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 461 } 462 463 /* update input line counters */ 464 icount = &port->icount; 465 if (new_lsr & SERIAL_LSR_BI) { 466 icount->brk++; 467 smp_wmb(); 468 } 469 if (new_lsr & SERIAL_LSR_OE) { 470 icount->overrun++; 471 smp_wmb(); 472 } 473 if (new_lsr & SERIAL_LSR_PE) { 474 icount->parity++; 475 smp_wmb(); 476 } 477 if (new_lsr & SERIAL_LSR_FE) { 478 icount->frame++; 479 smp_wmb(); 480 } 481 } 482 483 /************************************************************************/ 484 /************************************************************************/ 485 /* U S B C A L L B A C K F U N C T I O N S */ 486 /* U S B C A L L B A C K F U N C T I O N S */ 487 /************************************************************************/ 488 /************************************************************************/ 489 490 static void mos7840_control_callback(struct urb *urb) 491 { 492 unsigned char *data; 493 struct moschip_port *mos7840_port; 494 __u8 regval = 0x0; 495 int result = 0; 496 int status = urb->status; 497 498 mos7840_port = urb->context; 499 500 switch (status) { 501 case 0: 502 /* success */ 503 break; 504 case -ECONNRESET: 505 case -ENOENT: 506 case -ESHUTDOWN: 507 /* this urb is terminated, clean up */ 508 dbg("%s - urb shutting down with status: %d", __func__, 509 status); 510 return; 511 default: 512 dbg("%s - nonzero urb status received: %d", __func__, 513 status); 514 goto exit; 515 } 516 517 dbg("%s urb buffer size is %d", __func__, urb->actual_length); 518 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__, 519 mos7840_port->MsrLsr, mos7840_port->port_num); 520 data = urb->transfer_buffer; 521 regval = (__u8) data[0]; 522 dbg("%s data is %x", __func__, regval); 523 if (mos7840_port->MsrLsr == 0) 524 mos7840_handle_new_msr(mos7840_port, regval); 525 else if (mos7840_port->MsrLsr == 1) 526 mos7840_handle_new_lsr(mos7840_port, regval); 527 528 exit: 529 spin_lock(&mos7840_port->pool_lock); 530 if (!mos7840_port->zombie) 531 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 532 spin_unlock(&mos7840_port->pool_lock); 533 if (result) { 534 dev_err(&urb->dev->dev, 535 "%s - Error %d submitting interrupt urb\n", 536 __func__, result); 537 } 538 } 539 540 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 541 __u16 *val) 542 { 543 struct usb_device *dev = mcs->port->serial->dev; 544 struct usb_ctrlrequest *dr = mcs->dr; 545 unsigned char *buffer = mcs->ctrl_buf; 546 int ret; 547 548 dr->bRequestType = MCS_RD_RTYPE; 549 dr->bRequest = MCS_RDREQ; 550 dr->wValue = cpu_to_le16(Wval); /* 0 */ 551 dr->wIndex = cpu_to_le16(reg); 552 dr->wLength = cpu_to_le16(2); 553 554 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 555 (unsigned char *)dr, buffer, 2, 556 mos7840_control_callback, mcs); 557 mcs->control_urb->transfer_buffer_length = 2; 558 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 559 return ret; 560 } 561 562 /***************************************************************************** 563 * mos7840_interrupt_callback 564 * this is the callback function for when we have received data on the 565 * interrupt endpoint. 566 *****************************************************************************/ 567 568 static void mos7840_interrupt_callback(struct urb *urb) 569 { 570 int result; 571 int length; 572 struct moschip_port *mos7840_port; 573 struct usb_serial *serial; 574 __u16 Data; 575 unsigned char *data; 576 __u8 sp[5], st; 577 int i, rv = 0; 578 __u16 wval, wreg = 0; 579 int status = urb->status; 580 581 dbg("%s", " : Entering"); 582 583 switch (status) { 584 case 0: 585 /* success */ 586 break; 587 case -ECONNRESET: 588 case -ENOENT: 589 case -ESHUTDOWN: 590 /* this urb is terminated, clean up */ 591 dbg("%s - urb shutting down with status: %d", __func__, 592 status); 593 return; 594 default: 595 dbg("%s - nonzero urb status received: %d", __func__, 596 status); 597 goto exit; 598 } 599 600 length = urb->actual_length; 601 data = urb->transfer_buffer; 602 603 serial = urb->context; 604 605 /* Moschip get 5 bytes 606 * Byte 1 IIR Port 1 (port.number is 0) 607 * Byte 2 IIR Port 2 (port.number is 1) 608 * Byte 3 IIR Port 3 (port.number is 2) 609 * Byte 4 IIR Port 4 (port.number is 3) 610 * Byte 5 FIFO status for both */ 611 612 if (length && length > 5) { 613 dbg("%s", "Wrong data !!!"); 614 return; 615 } 616 617 sp[0] = (__u8) data[0]; 618 sp[1] = (__u8) data[1]; 619 sp[2] = (__u8) data[2]; 620 sp[3] = (__u8) data[3]; 621 st = (__u8) data[4]; 622 623 for (i = 0; i < serial->num_ports; i++) { 624 mos7840_port = mos7840_get_port_private(serial->port[i]); 625 wval = 626 (((__u16) serial->port[i]->number - 627 (__u16) (serial->minor)) + 1) << 8; 628 if (mos7840_port->open) { 629 if (sp[i] & 0x01) { 630 dbg("SP%d No Interrupt !!!", i); 631 } else { 632 switch (sp[i] & 0x0f) { 633 case SERIAL_IIR_RLS: 634 dbg("Serial Port %d: Receiver status error or ", i); 635 dbg("address bit detected in 9-bit mode"); 636 mos7840_port->MsrLsr = 1; 637 wreg = LINE_STATUS_REGISTER; 638 break; 639 case SERIAL_IIR_MS: 640 dbg("Serial Port %d: Modem status change", i); 641 mos7840_port->MsrLsr = 0; 642 wreg = MODEM_STATUS_REGISTER; 643 break; 644 } 645 spin_lock(&mos7840_port->pool_lock); 646 if (!mos7840_port->zombie) { 647 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 648 } else { 649 spin_unlock(&mos7840_port->pool_lock); 650 return; 651 } 652 spin_unlock(&mos7840_port->pool_lock); 653 } 654 } 655 } 656 if (!(rv < 0)) 657 /* the completion handler for the control urb will resubmit */ 658 return; 659 exit: 660 result = usb_submit_urb(urb, GFP_ATOMIC); 661 if (result) { 662 dev_err(&urb->dev->dev, 663 "%s - Error %d submitting interrupt urb\n", 664 __func__, result); 665 } 666 } 667 668 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 669 const char *function) 670 { 671 if (!port) { 672 dbg("%s - port == NULL", function); 673 return -1; 674 } 675 if (!port->serial) { 676 dbg("%s - port->serial == NULL", function); 677 return -1; 678 } 679 680 return 0; 681 } 682 683 /* Inline functions to check the sanity of a pointer that is passed to us */ 684 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 685 const char *function) 686 { 687 if (!serial) { 688 dbg("%s - serial == NULL", function); 689 return -1; 690 } 691 if (!serial->type) { 692 dbg("%s - serial->type == NULL!", function); 693 return -1; 694 } 695 696 return 0; 697 } 698 699 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 700 const char *function) 701 { 702 /* if no port was specified, or it fails a paranoia check */ 703 if (!port || 704 mos7840_port_paranoia_check(port, function) || 705 mos7840_serial_paranoia_check(port->serial, function)) { 706 /* then say that we don't have a valid usb_serial thing, 707 * which will end up genrating -ENODEV return values */ 708 return NULL; 709 } 710 711 return port->serial; 712 } 713 714 /***************************************************************************** 715 * mos7840_bulk_in_callback 716 * this is the callback function for when we have received data on the 717 * bulk in endpoint. 718 *****************************************************************************/ 719 720 static void mos7840_bulk_in_callback(struct urb *urb) 721 { 722 int retval; 723 unsigned char *data; 724 struct usb_serial *serial; 725 struct usb_serial_port *port; 726 struct moschip_port *mos7840_port; 727 struct tty_struct *tty; 728 int status = urb->status; 729 730 mos7840_port = urb->context; 731 if (!mos7840_port) { 732 dbg("%s", "NULL mos7840_port pointer"); 733 return; 734 } 735 736 if (status) { 737 dbg("nonzero read bulk status received: %d", status); 738 mos7840_port->read_urb_busy = false; 739 return; 740 } 741 742 port = (struct usb_serial_port *)mos7840_port->port; 743 if (mos7840_port_paranoia_check(port, __func__)) { 744 dbg("%s", "Port Paranoia failed"); 745 mos7840_port->read_urb_busy = false; 746 return; 747 } 748 749 serial = mos7840_get_usb_serial(port, __func__); 750 if (!serial) { 751 dbg("%s", "Bad serial pointer"); 752 mos7840_port->read_urb_busy = false; 753 return; 754 } 755 756 dbg("%s", "Entering... "); 757 758 data = urb->transfer_buffer; 759 760 dbg("%s", "Entering ..........."); 761 762 if (urb->actual_length) { 763 tty = tty_port_tty_get(&mos7840_port->port->port); 764 if (tty) { 765 tty_insert_flip_string(tty, data, urb->actual_length); 766 dbg(" %s ", data); 767 tty_flip_buffer_push(tty); 768 tty_kref_put(tty); 769 } 770 mos7840_port->icount.rx += urb->actual_length; 771 smp_wmb(); 772 dbg("mos7840_port->icount.rx is %d:", 773 mos7840_port->icount.rx); 774 } 775 776 if (!mos7840_port->read_urb) { 777 dbg("%s", "URB KILLED !!!"); 778 mos7840_port->read_urb_busy = false; 779 return; 780 } 781 782 783 mos7840_port->read_urb->dev = serial->dev; 784 785 mos7840_port->read_urb_busy = true; 786 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 787 788 if (retval) { 789 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); 790 mos7840_port->read_urb_busy = false; 791 } 792 } 793 794 /***************************************************************************** 795 * mos7840_bulk_out_data_callback 796 * this is the callback function for when we have finished sending 797 * serial data on the bulk out endpoint. 798 *****************************************************************************/ 799 800 static void mos7840_bulk_out_data_callback(struct urb *urb) 801 { 802 struct moschip_port *mos7840_port; 803 struct tty_struct *tty; 804 int status = urb->status; 805 int i; 806 807 mos7840_port = urb->context; 808 spin_lock(&mos7840_port->pool_lock); 809 for (i = 0; i < NUM_URBS; i++) { 810 if (urb == mos7840_port->write_urb_pool[i]) { 811 mos7840_port->busy[i] = 0; 812 break; 813 } 814 } 815 spin_unlock(&mos7840_port->pool_lock); 816 817 if (status) { 818 dbg("nonzero write bulk status received:%d", status); 819 return; 820 } 821 822 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { 823 dbg("%s", "Port Paranoia failed"); 824 return; 825 } 826 827 dbg("%s", "Entering ........."); 828 829 tty = tty_port_tty_get(&mos7840_port->port->port); 830 if (tty && mos7840_port->open) 831 tty_wakeup(tty); 832 tty_kref_put(tty); 833 834 } 835 836 /************************************************************************/ 837 /* 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 */ 838 /************************************************************************/ 839 #ifdef MCSSerialProbe 840 static int mos7840_serial_probe(struct usb_serial *serial, 841 const struct usb_device_id *id) 842 { 843 844 /*need to implement the mode_reg reading and updating\ 845 structures usb_serial_ device_type\ 846 (i.e num_ports, num_bulkin,bulkout etc) */ 847 /* Also we can update the changes attach */ 848 return 1; 849 } 850 #endif 851 852 /***************************************************************************** 853 * mos7840_open 854 * this function is called by the tty driver when a port is opened 855 * If successful, we return 0 856 * Otherwise we return a negative error number. 857 *****************************************************************************/ 858 859 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 860 { 861 int response; 862 int j; 863 struct usb_serial *serial; 864 struct urb *urb; 865 __u16 Data; 866 int status; 867 struct moschip_port *mos7840_port; 868 struct moschip_port *port0; 869 870 dbg ("%s enter", __func__); 871 872 if (mos7840_port_paranoia_check(port, __func__)) { 873 dbg("%s", "Port Paranoia failed"); 874 return -ENODEV; 875 } 876 877 serial = port->serial; 878 879 if (mos7840_serial_paranoia_check(serial, __func__)) { 880 dbg("%s", "Serial Paranoia failed"); 881 return -ENODEV; 882 } 883 884 mos7840_port = mos7840_get_port_private(port); 885 port0 = mos7840_get_port_private(serial->port[0]); 886 887 if (mos7840_port == NULL || port0 == NULL) 888 return -ENODEV; 889 890 usb_clear_halt(serial->dev, port->write_urb->pipe); 891 usb_clear_halt(serial->dev, port->read_urb->pipe); 892 port0->open_ports++; 893 894 /* Initialising the write urb pool */ 895 for (j = 0; j < NUM_URBS; ++j) { 896 urb = usb_alloc_urb(0, GFP_KERNEL); 897 mos7840_port->write_urb_pool[j] = urb; 898 899 if (urb == NULL) { 900 dev_err(&port->dev, "No more urbs???\n"); 901 continue; 902 } 903 904 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 905 GFP_KERNEL); 906 if (!urb->transfer_buffer) { 907 usb_free_urb(urb); 908 mos7840_port->write_urb_pool[j] = NULL; 909 dev_err(&port->dev, 910 "%s-out of memory for urb buffers.\n", 911 __func__); 912 continue; 913 } 914 } 915 916 /***************************************************************************** 917 * Initialize MCS7840 -- Write Init values to corresponding Registers 918 * 919 * Register Index 920 * 1 : IER 921 * 2 : FCR 922 * 3 : LCR 923 * 4 : MCR 924 * 925 * 0x08 : SP1/2 Control Reg 926 *****************************************************************************/ 927 928 /* NEED to check the following Block */ 929 930 Data = 0x0; 931 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 932 if (status < 0) { 933 dbg("Reading Spreg failed"); 934 return -1; 935 } 936 Data |= 0x80; 937 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 938 if (status < 0) { 939 dbg("writing Spreg failed"); 940 return -1; 941 } 942 943 Data &= ~0x80; 944 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 945 if (status < 0) { 946 dbg("writing Spreg failed"); 947 return -1; 948 } 949 /* End of block to be checked */ 950 951 Data = 0x0; 952 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 953 &Data); 954 if (status < 0) { 955 dbg("Reading Controlreg failed"); 956 return -1; 957 } 958 Data |= 0x08; /* Driver done bit */ 959 Data |= 0x20; /* rx_disable */ 960 status = mos7840_set_reg_sync(port, 961 mos7840_port->ControlRegOffset, Data); 962 if (status < 0) { 963 dbg("writing Controlreg failed"); 964 return -1; 965 } 966 /* do register settings here */ 967 /* Set all regs to the device default values. */ 968 /*********************************** 969 * First Disable all interrupts. 970 ***********************************/ 971 Data = 0x00; 972 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 973 if (status < 0) { 974 dbg("disabling interrupts failed"); 975 return -1; 976 } 977 /* Set FIFO_CONTROL_REGISTER to the default value */ 978 Data = 0x00; 979 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 980 if (status < 0) { 981 dbg("Writing FIFO_CONTROL_REGISTER failed"); 982 return -1; 983 } 984 985 Data = 0xcf; 986 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 987 if (status < 0) { 988 dbg("Writing FIFO_CONTROL_REGISTER failed"); 989 return -1; 990 } 991 992 Data = 0x03; 993 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 994 mos7840_port->shadowLCR = Data; 995 996 Data = 0x0b; 997 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 998 mos7840_port->shadowMCR = Data; 999 1000 Data = 0x00; 1001 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1002 mos7840_port->shadowLCR = Data; 1003 1004 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1005 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1006 1007 Data = 0x0c; 1008 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1009 1010 Data = 0x0; 1011 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1012 1013 Data = 0x00; 1014 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1015 1016 Data = Data & ~SERIAL_LCR_DLAB; 1017 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1018 mos7840_port->shadowLCR = Data; 1019 1020 /* clearing Bulkin and Bulkout Fifo */ 1021 Data = 0x0; 1022 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1023 1024 Data = Data | 0x0c; 1025 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1026 1027 Data = Data & ~0x0c; 1028 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1029 /* Finally enable all interrupts */ 1030 Data = 0x0c; 1031 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1032 1033 /* clearing rx_disable */ 1034 Data = 0x0; 1035 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1036 &Data); 1037 Data = Data & ~0x20; 1038 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1039 Data); 1040 1041 /* rx_negate */ 1042 Data = 0x0; 1043 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1044 &Data); 1045 Data = Data | 0x10; 1046 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1047 Data); 1048 1049 /* Check to see if we've set up our endpoint info yet * 1050 * (can't set it up in mos7840_startup as the structures * 1051 * were not set up at that time.) */ 1052 if (port0->open_ports == 1) { 1053 if (serial->port[0]->interrupt_in_buffer == NULL) { 1054 /* set up interrupt urb */ 1055 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1056 serial->dev, 1057 usb_rcvintpipe(serial->dev, 1058 serial->port[0]->interrupt_in_endpointAddress), 1059 serial->port[0]->interrupt_in_buffer, 1060 serial->port[0]->interrupt_in_urb-> 1061 transfer_buffer_length, 1062 mos7840_interrupt_callback, 1063 serial, 1064 serial->port[0]->interrupt_in_urb->interval); 1065 1066 /* start interrupt read for mos7840 * 1067 * will continue as long as mos7840 is connected */ 1068 1069 response = 1070 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1071 GFP_KERNEL); 1072 if (response) { 1073 dev_err(&port->dev, "%s - Error %d submitting " 1074 "interrupt urb\n", __func__, response); 1075 } 1076 1077 } 1078 1079 } 1080 1081 /* see if we've set up our endpoint info yet * 1082 * (can't set it up in mos7840_startup as the * 1083 * structures were not set up at that time.) */ 1084 1085 dbg("port number is %d", port->number); 1086 dbg("serial number is %d", port->serial->minor); 1087 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); 1088 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); 1089 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); 1090 dbg("port's number in the device is %d", mos7840_port->port_num); 1091 mos7840_port->read_urb = port->read_urb; 1092 1093 /* set up our bulk in urb */ 1094 1095 usb_fill_bulk_urb(mos7840_port->read_urb, 1096 serial->dev, 1097 usb_rcvbulkpipe(serial->dev, 1098 port->bulk_in_endpointAddress), 1099 port->bulk_in_buffer, 1100 mos7840_port->read_urb->transfer_buffer_length, 1101 mos7840_bulk_in_callback, mos7840_port); 1102 1103 dbg("mos7840_open: bulkin endpoint is %d", 1104 port->bulk_in_endpointAddress); 1105 mos7840_port->read_urb_busy = true; 1106 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1107 if (response) { 1108 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1109 __func__, response); 1110 mos7840_port->read_urb_busy = false; 1111 } 1112 1113 /* initialize our wait queues */ 1114 init_waitqueue_head(&mos7840_port->wait_chase); 1115 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1116 1117 /* initialize our icount structure */ 1118 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1119 1120 /* initialize our port settings */ 1121 /* Must set to enable ints! */ 1122 mos7840_port->shadowMCR = MCR_MASTER_IE; 1123 /* send a open port command */ 1124 mos7840_port->open = 1; 1125 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1126 mos7840_port->icount.tx = 0; 1127 mos7840_port->icount.rx = 0; 1128 1129 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", 1130 serial, mos7840_port, port); 1131 1132 dbg ("%s leave", __func__); 1133 1134 return 0; 1135 1136 } 1137 1138 /***************************************************************************** 1139 * mos7840_chars_in_buffer 1140 * this function is called by the tty driver when it wants to know how many 1141 * bytes of data we currently have outstanding in the port (data that has 1142 * been written, but hasn't made it out the port yet) 1143 * If successful, we return the number of bytes left to be written in the 1144 * system, 1145 * Otherwise we return zero. 1146 *****************************************************************************/ 1147 1148 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1149 { 1150 struct usb_serial_port *port = tty->driver_data; 1151 int i; 1152 int chars = 0; 1153 unsigned long flags; 1154 struct moschip_port *mos7840_port; 1155 1156 dbg("%s", " mos7840_chars_in_buffer:entering ..........."); 1157 1158 if (mos7840_port_paranoia_check(port, __func__)) { 1159 dbg("%s", "Invalid port"); 1160 return 0; 1161 } 1162 1163 mos7840_port = mos7840_get_port_private(port); 1164 if (mos7840_port == NULL) { 1165 dbg("%s", "mos7840_break:leaving ..........."); 1166 return 0; 1167 } 1168 1169 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1170 for (i = 0; i < NUM_URBS; ++i) 1171 if (mos7840_port->busy[i]) 1172 chars += URB_TRANSFER_BUFFER_SIZE; 1173 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1174 dbg("%s - returns %d", __func__, chars); 1175 return chars; 1176 1177 } 1178 1179 /***************************************************************************** 1180 * mos7840_close 1181 * this function is called by the tty driver when a port is closed 1182 *****************************************************************************/ 1183 1184 static void mos7840_close(struct usb_serial_port *port) 1185 { 1186 struct usb_serial *serial; 1187 struct moschip_port *mos7840_port; 1188 struct moschip_port *port0; 1189 int j; 1190 __u16 Data; 1191 1192 dbg("%s", "mos7840_close:entering..."); 1193 1194 if (mos7840_port_paranoia_check(port, __func__)) { 1195 dbg("%s", "Port Paranoia failed"); 1196 return; 1197 } 1198 1199 serial = mos7840_get_usb_serial(port, __func__); 1200 if (!serial) { 1201 dbg("%s", "Serial Paranoia failed"); 1202 return; 1203 } 1204 1205 mos7840_port = mos7840_get_port_private(port); 1206 port0 = mos7840_get_port_private(serial->port[0]); 1207 1208 if (mos7840_port == NULL || port0 == NULL) 1209 return; 1210 1211 for (j = 0; j < NUM_URBS; ++j) 1212 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1213 1214 /* Freeing Write URBs */ 1215 for (j = 0; j < NUM_URBS; ++j) { 1216 if (mos7840_port->write_urb_pool[j]) { 1217 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1218 kfree(mos7840_port->write_urb_pool[j]-> 1219 transfer_buffer); 1220 1221 usb_free_urb(mos7840_port->write_urb_pool[j]); 1222 } 1223 } 1224 1225 /* While closing port, shutdown all bulk read, write * 1226 * and interrupt read if they exists */ 1227 if (serial->dev) { 1228 if (mos7840_port->write_urb) { 1229 dbg("%s", "Shutdown bulk write"); 1230 usb_kill_urb(mos7840_port->write_urb); 1231 } 1232 if (mos7840_port->read_urb) { 1233 dbg("%s", "Shutdown bulk read"); 1234 usb_kill_urb(mos7840_port->read_urb); 1235 mos7840_port->read_urb_busy = false; 1236 } 1237 if ((&mos7840_port->control_urb)) { 1238 dbg("%s", "Shutdown control read"); 1239 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1240 } 1241 } 1242 /* if(mos7840_port->ctrl_buf != NULL) */ 1243 /* kfree(mos7840_port->ctrl_buf); */ 1244 port0->open_ports--; 1245 dbg("mos7840_num_open_ports in close%d:in port%d", 1246 port0->open_ports, port->number); 1247 if (port0->open_ports == 0) { 1248 if (serial->port[0]->interrupt_in_urb) { 1249 dbg("%s", "Shutdown interrupt_in_urb"); 1250 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1251 } 1252 } 1253 1254 if (mos7840_port->write_urb) { 1255 /* if this urb had a transfer buffer already (old tx) free it */ 1256 if (mos7840_port->write_urb->transfer_buffer != NULL) 1257 kfree(mos7840_port->write_urb->transfer_buffer); 1258 usb_free_urb(mos7840_port->write_urb); 1259 } 1260 1261 Data = 0x0; 1262 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1263 1264 Data = 0x00; 1265 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1266 1267 mos7840_port->open = 0; 1268 1269 dbg("%s", "Leaving ............"); 1270 } 1271 1272 /************************************************************************ 1273 * 1274 * mos7840_block_until_chase_response 1275 * 1276 * This function will block the close until one of the following: 1277 * 1. Response to our Chase comes from mos7840 1278 * 2. A timeout of 10 seconds without activity has expired 1279 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1280 * 1281 ************************************************************************/ 1282 1283 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1284 struct moschip_port *mos7840_port) 1285 { 1286 int timeout = 1 * HZ; 1287 int wait = 10; 1288 int count; 1289 1290 while (1) { 1291 count = mos7840_chars_in_buffer(tty); 1292 1293 /* Check for Buffer status */ 1294 if (count <= 0) 1295 return; 1296 1297 /* Block the thread for a while */ 1298 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1299 timeout); 1300 /* No activity.. count down section */ 1301 wait--; 1302 if (wait == 0) { 1303 dbg("%s - TIMEOUT", __func__); 1304 return; 1305 } else { 1306 /* Reset timeout value back to seconds */ 1307 wait = 10; 1308 } 1309 } 1310 1311 } 1312 1313 /***************************************************************************** 1314 * mos7840_break 1315 * this function sends a break to the port 1316 *****************************************************************************/ 1317 static void mos7840_break(struct tty_struct *tty, int break_state) 1318 { 1319 struct usb_serial_port *port = tty->driver_data; 1320 unsigned char data; 1321 struct usb_serial *serial; 1322 struct moschip_port *mos7840_port; 1323 1324 dbg("%s", "Entering ..........."); 1325 dbg("mos7840_break: Start"); 1326 1327 if (mos7840_port_paranoia_check(port, __func__)) { 1328 dbg("%s", "Port Paranoia failed"); 1329 return; 1330 } 1331 1332 serial = mos7840_get_usb_serial(port, __func__); 1333 if (!serial) { 1334 dbg("%s", "Serial Paranoia failed"); 1335 return; 1336 } 1337 1338 mos7840_port = mos7840_get_port_private(port); 1339 1340 if (mos7840_port == NULL) 1341 return; 1342 1343 if (serial->dev) 1344 /* flush and block until tx is empty */ 1345 mos7840_block_until_chase_response(tty, mos7840_port); 1346 1347 if (break_state == -1) 1348 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1349 else 1350 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1351 1352 /* FIXME: no locking on shadowLCR anywhere in driver */ 1353 mos7840_port->shadowLCR = data; 1354 dbg("mcs7840_break mos7840_port->shadowLCR is %x", 1355 mos7840_port->shadowLCR); 1356 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1357 mos7840_port->shadowLCR); 1358 1359 return; 1360 } 1361 1362 /***************************************************************************** 1363 * mos7840_write_room 1364 * this function is called by the tty driver when it wants to know how many 1365 * bytes of data we can accept for a specific port. 1366 * If successful, we return the amount of room that we have for this port 1367 * Otherwise we return a negative error number. 1368 *****************************************************************************/ 1369 1370 static int mos7840_write_room(struct tty_struct *tty) 1371 { 1372 struct usb_serial_port *port = tty->driver_data; 1373 int i; 1374 int room = 0; 1375 unsigned long flags; 1376 struct moschip_port *mos7840_port; 1377 1378 dbg("%s", " mos7840_write_room:entering ..........."); 1379 1380 if (mos7840_port_paranoia_check(port, __func__)) { 1381 dbg("%s", "Invalid port"); 1382 dbg("%s", " mos7840_write_room:leaving ..........."); 1383 return -1; 1384 } 1385 1386 mos7840_port = mos7840_get_port_private(port); 1387 if (mos7840_port == NULL) { 1388 dbg("%s", "mos7840_break:leaving ..........."); 1389 return -1; 1390 } 1391 1392 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1393 for (i = 0; i < NUM_URBS; ++i) { 1394 if (!mos7840_port->busy[i]) 1395 room += URB_TRANSFER_BUFFER_SIZE; 1396 } 1397 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1398 1399 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1400 dbg("%s - returns %d", __func__, room); 1401 return room; 1402 1403 } 1404 1405 /***************************************************************************** 1406 * mos7840_write 1407 * this function is called by the tty driver when data should be written to 1408 * the port. 1409 * If successful, we return the number of bytes written, otherwise we 1410 * return a negative error number. 1411 *****************************************************************************/ 1412 1413 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1414 const unsigned char *data, int count) 1415 { 1416 int status; 1417 int i; 1418 int bytes_sent = 0; 1419 int transfer_size; 1420 unsigned long flags; 1421 1422 struct moschip_port *mos7840_port; 1423 struct usb_serial *serial; 1424 struct urb *urb; 1425 /* __u16 Data; */ 1426 const unsigned char *current_position = data; 1427 unsigned char *data1; 1428 dbg("%s", "entering ..........."); 1429 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1430 mos7840_port->shadowLCR); */ 1431 1432 #ifdef NOTMOS7840 1433 Data = 0x00; 1434 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1435 mos7840_port->shadowLCR = Data; 1436 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); 1437 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1438 mos7840_port->shadowLCR); 1439 1440 /* Data = 0x03; */ 1441 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1442 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1443 1444 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1445 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1446 1447 /* Data = 0x0c; */ 1448 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1449 Data = 0x00; 1450 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1451 dbg("mos7840_write:DLL value is %x", Data); 1452 1453 Data = 0x0; 1454 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1455 dbg("mos7840_write:DLM value is %x", Data); 1456 1457 Data = Data & ~SERIAL_LCR_DLAB; 1458 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1459 mos7840_port->shadowLCR); 1460 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1461 #endif 1462 1463 if (mos7840_port_paranoia_check(port, __func__)) { 1464 dbg("%s", "Port Paranoia failed"); 1465 return -1; 1466 } 1467 1468 serial = port->serial; 1469 if (mos7840_serial_paranoia_check(serial, __func__)) { 1470 dbg("%s", "Serial Paranoia failed"); 1471 return -1; 1472 } 1473 1474 mos7840_port = mos7840_get_port_private(port); 1475 if (mos7840_port == NULL) { 1476 dbg("%s", "mos7840_port is NULL"); 1477 return -1; 1478 } 1479 1480 /* try to find a free urb in the list */ 1481 urb = NULL; 1482 1483 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1484 for (i = 0; i < NUM_URBS; ++i) { 1485 if (!mos7840_port->busy[i]) { 1486 mos7840_port->busy[i] = 1; 1487 urb = mos7840_port->write_urb_pool[i]; 1488 dbg("URB:%d", i); 1489 break; 1490 } 1491 } 1492 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1493 1494 if (urb == NULL) { 1495 dbg("%s - no more free urbs", __func__); 1496 goto exit; 1497 } 1498 1499 if (urb->transfer_buffer == NULL) { 1500 urb->transfer_buffer = 1501 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1502 1503 if (urb->transfer_buffer == NULL) { 1504 dev_err(&port->dev, "%s no more kernel memory...\n", 1505 __func__); 1506 goto exit; 1507 } 1508 } 1509 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1510 1511 memcpy(urb->transfer_buffer, current_position, transfer_size); 1512 1513 /* fill urb with data and submit */ 1514 usb_fill_bulk_urb(urb, 1515 serial->dev, 1516 usb_sndbulkpipe(serial->dev, 1517 port->bulk_out_endpointAddress), 1518 urb->transfer_buffer, 1519 transfer_size, 1520 mos7840_bulk_out_data_callback, mos7840_port); 1521 1522 data1 = urb->transfer_buffer; 1523 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); 1524 1525 /* send it down the pipe */ 1526 status = usb_submit_urb(urb, GFP_ATOMIC); 1527 1528 if (status) { 1529 mos7840_port->busy[i] = 0; 1530 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 1531 "with status = %d\n", __func__, status); 1532 bytes_sent = status; 1533 goto exit; 1534 } 1535 bytes_sent = transfer_size; 1536 mos7840_port->icount.tx += transfer_size; 1537 smp_wmb(); 1538 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); 1539 exit: 1540 return bytes_sent; 1541 1542 } 1543 1544 /***************************************************************************** 1545 * mos7840_throttle 1546 * this function is called by the tty driver when it wants to stop the data 1547 * being read from the port. 1548 *****************************************************************************/ 1549 1550 static void mos7840_throttle(struct tty_struct *tty) 1551 { 1552 struct usb_serial_port *port = tty->driver_data; 1553 struct moschip_port *mos7840_port; 1554 int status; 1555 1556 if (mos7840_port_paranoia_check(port, __func__)) { 1557 dbg("%s", "Invalid port"); 1558 return; 1559 } 1560 1561 dbg("- port %d", port->number); 1562 1563 mos7840_port = mos7840_get_port_private(port); 1564 1565 if (mos7840_port == NULL) 1566 return; 1567 1568 if (!mos7840_port->open) { 1569 dbg("%s", "port not opened"); 1570 return; 1571 } 1572 1573 dbg("%s", "Entering .........."); 1574 1575 /* if we are implementing XON/XOFF, send the stop character */ 1576 if (I_IXOFF(tty)) { 1577 unsigned char stop_char = STOP_CHAR(tty); 1578 status = mos7840_write(tty, port, &stop_char, 1); 1579 if (status <= 0) 1580 return; 1581 } 1582 /* if we are implementing RTS/CTS, toggle that line */ 1583 if (tty->termios->c_cflag & CRTSCTS) { 1584 mos7840_port->shadowMCR &= ~MCR_RTS; 1585 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1586 mos7840_port->shadowMCR); 1587 if (status < 0) 1588 return; 1589 } 1590 1591 return; 1592 } 1593 1594 /***************************************************************************** 1595 * mos7840_unthrottle 1596 * this function is called by the tty driver when it wants to resume 1597 * the data being read from the port (called after mos7840_throttle is 1598 * called) 1599 *****************************************************************************/ 1600 static void mos7840_unthrottle(struct tty_struct *tty) 1601 { 1602 struct usb_serial_port *port = tty->driver_data; 1603 int status; 1604 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1605 1606 if (mos7840_port_paranoia_check(port, __func__)) { 1607 dbg("%s", "Invalid port"); 1608 return; 1609 } 1610 1611 if (mos7840_port == NULL) 1612 return; 1613 1614 if (!mos7840_port->open) { 1615 dbg("%s - port not opened", __func__); 1616 return; 1617 } 1618 1619 dbg("%s", "Entering .........."); 1620 1621 /* if we are implementing XON/XOFF, send the start character */ 1622 if (I_IXOFF(tty)) { 1623 unsigned char start_char = START_CHAR(tty); 1624 status = mos7840_write(tty, port, &start_char, 1); 1625 if (status <= 0) 1626 return; 1627 } 1628 1629 /* if we are implementing RTS/CTS, toggle that line */ 1630 if (tty->termios->c_cflag & CRTSCTS) { 1631 mos7840_port->shadowMCR |= MCR_RTS; 1632 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1633 mos7840_port->shadowMCR); 1634 if (status < 0) 1635 return; 1636 } 1637 } 1638 1639 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) 1640 { 1641 struct usb_serial_port *port = tty->driver_data; 1642 struct moschip_port *mos7840_port; 1643 unsigned int result; 1644 __u16 msr; 1645 __u16 mcr; 1646 int status; 1647 mos7840_port = mos7840_get_port_private(port); 1648 1649 dbg("%s - port %d", __func__, port->number); 1650 1651 if (mos7840_port == NULL) 1652 return -ENODEV; 1653 1654 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1655 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1656 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1657 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1658 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1659 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1660 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1661 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1662 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1663 1664 dbg("%s - 0x%04X", __func__, result); 1665 1666 return result; 1667 } 1668 1669 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, 1670 unsigned int set, unsigned int clear) 1671 { 1672 struct usb_serial_port *port = tty->driver_data; 1673 struct moschip_port *mos7840_port; 1674 unsigned int mcr; 1675 int status; 1676 1677 dbg("%s - port %d", __func__, port->number); 1678 1679 mos7840_port = mos7840_get_port_private(port); 1680 1681 if (mos7840_port == NULL) 1682 return -ENODEV; 1683 1684 /* FIXME: What locks the port registers ? */ 1685 mcr = mos7840_port->shadowMCR; 1686 if (clear & TIOCM_RTS) 1687 mcr &= ~MCR_RTS; 1688 if (clear & TIOCM_DTR) 1689 mcr &= ~MCR_DTR; 1690 if (clear & TIOCM_LOOP) 1691 mcr &= ~MCR_LOOPBACK; 1692 1693 if (set & TIOCM_RTS) 1694 mcr |= MCR_RTS; 1695 if (set & TIOCM_DTR) 1696 mcr |= MCR_DTR; 1697 if (set & TIOCM_LOOP) 1698 mcr |= MCR_LOOPBACK; 1699 1700 mos7840_port->shadowMCR = mcr; 1701 1702 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1703 if (status < 0) { 1704 dbg("setting MODEM_CONTROL_REGISTER Failed"); 1705 return status; 1706 } 1707 1708 return 0; 1709 } 1710 1711 /***************************************************************************** 1712 * mos7840_calc_baud_rate_divisor 1713 * this function calculates the proper baud rate divisor for the specified 1714 * baud rate. 1715 *****************************************************************************/ 1716 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1717 __u16 *clk_sel_val) 1718 { 1719 1720 dbg("%s - %d", __func__, baudRate); 1721 1722 if (baudRate <= 115200) { 1723 *divisor = 115200 / baudRate; 1724 *clk_sel_val = 0x0; 1725 } 1726 if ((baudRate > 115200) && (baudRate <= 230400)) { 1727 *divisor = 230400 / baudRate; 1728 *clk_sel_val = 0x10; 1729 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1730 *divisor = 403200 / baudRate; 1731 *clk_sel_val = 0x20; 1732 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1733 *divisor = 460800 / baudRate; 1734 *clk_sel_val = 0x30; 1735 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1736 *divisor = 806400 / baudRate; 1737 *clk_sel_val = 0x40; 1738 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1739 *divisor = 921600 / baudRate; 1740 *clk_sel_val = 0x50; 1741 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1742 *divisor = 1572864 / baudRate; 1743 *clk_sel_val = 0x60; 1744 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1745 *divisor = 3145728 / baudRate; 1746 *clk_sel_val = 0x70; 1747 } 1748 return 0; 1749 1750 #ifdef NOTMCS7840 1751 1752 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1753 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1754 *divisor = mos7840_divisor_table[i].Divisor; 1755 return 0; 1756 } 1757 } 1758 1759 /* After trying for all the standard baud rates * 1760 * Try calculating the divisor for this baud rate */ 1761 1762 if (baudrate > 75 && baudrate < 230400) { 1763 /* get the divisor */ 1764 custom = (__u16) (230400L / baudrate); 1765 1766 /* Check for round off */ 1767 round1 = (__u16) (2304000L / baudrate); 1768 round = (__u16) (round1 - (custom * 10)); 1769 if (round > 4) 1770 custom++; 1771 *divisor = custom; 1772 1773 dbg(" Baud %d = %d", baudrate, custom); 1774 return 0; 1775 } 1776 1777 dbg("%s", " Baud calculation Failed..."); 1778 return -1; 1779 #endif 1780 } 1781 1782 /***************************************************************************** 1783 * mos7840_send_cmd_write_baud_rate 1784 * this function sends the proper command to change the baud rate of the 1785 * specified port. 1786 *****************************************************************************/ 1787 1788 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1789 int baudRate) 1790 { 1791 int divisor = 0; 1792 int status; 1793 __u16 Data; 1794 unsigned char number; 1795 __u16 clk_sel_val; 1796 struct usb_serial_port *port; 1797 1798 if (mos7840_port == NULL) 1799 return -1; 1800 1801 port = (struct usb_serial_port *)mos7840_port->port; 1802 if (mos7840_port_paranoia_check(port, __func__)) { 1803 dbg("%s", "Invalid port"); 1804 return -1; 1805 } 1806 1807 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1808 dbg("%s", "Invalid Serial"); 1809 return -1; 1810 } 1811 1812 dbg("%s", "Entering .........."); 1813 1814 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1815 1816 dbg("%s - port = %d, baud = %d", __func__, 1817 mos7840_port->port->number, baudRate); 1818 /* reset clk_uart_sel in spregOffset */ 1819 if (baudRate > 115200) { 1820 #ifdef HW_flow_control 1821 /* NOTE: need to see the pther register to modify */ 1822 /* setting h/w flow control bit to 1 */ 1823 Data = 0x2b; 1824 mos7840_port->shadowMCR = Data; 1825 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1826 Data); 1827 if (status < 0) { 1828 dbg("Writing spreg failed in set_serial_baud"); 1829 return -1; 1830 } 1831 #endif 1832 1833 } else { 1834 #ifdef HW_flow_control 1835 / *setting h/w flow control bit to 0 */ 1836 Data = 0xb; 1837 mos7840_port->shadowMCR = Data; 1838 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1839 Data); 1840 if (status < 0) { 1841 dbg("Writing spreg failed in set_serial_baud"); 1842 return -1; 1843 } 1844 #endif 1845 1846 } 1847 1848 if (1) { /* baudRate <= 115200) */ 1849 clk_sel_val = 0x0; 1850 Data = 0x0; 1851 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1852 &clk_sel_val); 1853 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1854 &Data); 1855 if (status < 0) { 1856 dbg("reading spreg failed in set_serial_baud"); 1857 return -1; 1858 } 1859 Data = (Data & 0x8f) | clk_sel_val; 1860 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1861 Data); 1862 if (status < 0) { 1863 dbg("Writing spreg failed in set_serial_baud"); 1864 return -1; 1865 } 1866 /* Calculate the Divisor */ 1867 1868 if (status) { 1869 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1870 return status; 1871 } 1872 /* Enable 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 /* Write the divisor */ 1878 Data = (unsigned char)(divisor & 0xff); 1879 dbg("set_serial_baud Value to write DLL is %x", Data); 1880 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1881 1882 Data = (unsigned char)((divisor & 0xff00) >> 8); 1883 dbg("set_serial_baud Value to write DLM is %x", Data); 1884 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1885 1886 /* Disable access to divisor latch */ 1887 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1888 mos7840_port->shadowLCR = Data; 1889 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1890 1891 } 1892 return status; 1893 } 1894 1895 /***************************************************************************** 1896 * mos7840_change_port_settings 1897 * This routine is called to set the UART on the device to match 1898 * the specified new settings. 1899 *****************************************************************************/ 1900 1901 static void mos7840_change_port_settings(struct tty_struct *tty, 1902 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1903 { 1904 int baud; 1905 unsigned cflag; 1906 unsigned iflag; 1907 __u8 lData; 1908 __u8 lParity; 1909 __u8 lStop; 1910 int status; 1911 __u16 Data; 1912 struct usb_serial_port *port; 1913 struct usb_serial *serial; 1914 1915 if (mos7840_port == NULL) 1916 return; 1917 1918 port = (struct usb_serial_port *)mos7840_port->port; 1919 1920 if (mos7840_port_paranoia_check(port, __func__)) { 1921 dbg("%s", "Invalid port"); 1922 return; 1923 } 1924 1925 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1926 dbg("%s", "Invalid Serial"); 1927 return; 1928 } 1929 1930 serial = port->serial; 1931 1932 dbg("%s - port %d", __func__, mos7840_port->port->number); 1933 1934 if (!mos7840_port->open) { 1935 dbg("%s - port not opened", __func__); 1936 return; 1937 } 1938 1939 dbg("%s", "Entering .........."); 1940 1941 lData = LCR_BITS_8; 1942 lStop = LCR_STOP_1; 1943 lParity = LCR_PAR_NONE; 1944 1945 cflag = tty->termios->c_cflag; 1946 iflag = tty->termios->c_iflag; 1947 1948 /* Change the number of bits */ 1949 if (cflag & CSIZE) { 1950 switch (cflag & CSIZE) { 1951 case CS5: 1952 lData = LCR_BITS_5; 1953 break; 1954 1955 case CS6: 1956 lData = LCR_BITS_6; 1957 break; 1958 1959 case CS7: 1960 lData = LCR_BITS_7; 1961 break; 1962 default: 1963 case CS8: 1964 lData = LCR_BITS_8; 1965 break; 1966 } 1967 } 1968 /* Change the Parity bit */ 1969 if (cflag & PARENB) { 1970 if (cflag & PARODD) { 1971 lParity = LCR_PAR_ODD; 1972 dbg("%s - parity = odd", __func__); 1973 } else { 1974 lParity = LCR_PAR_EVEN; 1975 dbg("%s - parity = even", __func__); 1976 } 1977 1978 } else { 1979 dbg("%s - parity = none", __func__); 1980 } 1981 1982 if (cflag & CMSPAR) 1983 lParity = lParity | 0x20; 1984 1985 /* Change the Stop bit */ 1986 if (cflag & CSTOPB) { 1987 lStop = LCR_STOP_2; 1988 dbg("%s - stop bits = 2", __func__); 1989 } else { 1990 lStop = LCR_STOP_1; 1991 dbg("%s - stop bits = 1", __func__); 1992 } 1993 1994 /* Update the LCR with the correct value */ 1995 mos7840_port->shadowLCR &= 1996 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1997 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1998 1999 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", 2000 mos7840_port->shadowLCR); 2001 /* Disable Interrupts */ 2002 Data = 0x00; 2003 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2004 2005 Data = 0x00; 2006 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2007 2008 Data = 0xcf; 2009 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2010 2011 /* Send the updated LCR value to the mos7840 */ 2012 Data = mos7840_port->shadowLCR; 2013 2014 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 2015 2016 Data = 0x00b; 2017 mos7840_port->shadowMCR = Data; 2018 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2019 Data = 0x00b; 2020 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2021 2022 /* set up the MCR register and send it to the mos7840 */ 2023 2024 mos7840_port->shadowMCR = MCR_MASTER_IE; 2025 if (cflag & CBAUD) 2026 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2027 2028 if (cflag & CRTSCTS) 2029 mos7840_port->shadowMCR |= (MCR_XON_ANY); 2030 else 2031 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2032 2033 Data = mos7840_port->shadowMCR; 2034 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2035 2036 /* Determine divisor based on baud rate */ 2037 baud = tty_get_baud_rate(tty); 2038 2039 if (!baud) { 2040 /* pick a default, any default... */ 2041 dbg("%s", "Picked default baud..."); 2042 baud = 9600; 2043 } 2044 2045 dbg("%s - baud rate = %d", __func__, baud); 2046 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2047 2048 /* Enable Interrupts */ 2049 Data = 0x0c; 2050 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2051 2052 if (mos7840_port->read_urb_busy == false) { 2053 mos7840_port->read_urb->dev = serial->dev; 2054 mos7840_port->read_urb_busy = true; 2055 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2056 if (status) { 2057 dbg("usb_submit_urb(read bulk) failed, status = %d", 2058 status); 2059 mos7840_port->read_urb_busy = false; 2060 } 2061 } 2062 wake_up(&mos7840_port->delta_msr_wait); 2063 mos7840_port->delta_msr_cond = 1; 2064 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", 2065 mos7840_port->shadowLCR); 2066 2067 return; 2068 } 2069 2070 /***************************************************************************** 2071 * mos7840_set_termios 2072 * this function is called by the tty driver when it wants to change 2073 * the termios structure 2074 *****************************************************************************/ 2075 2076 static void mos7840_set_termios(struct tty_struct *tty, 2077 struct usb_serial_port *port, 2078 struct ktermios *old_termios) 2079 { 2080 int status; 2081 unsigned int cflag; 2082 struct usb_serial *serial; 2083 struct moschip_port *mos7840_port; 2084 dbg("mos7840_set_termios: START"); 2085 if (mos7840_port_paranoia_check(port, __func__)) { 2086 dbg("%s", "Invalid port"); 2087 return; 2088 } 2089 2090 serial = port->serial; 2091 2092 if (mos7840_serial_paranoia_check(serial, __func__)) { 2093 dbg("%s", "Invalid Serial"); 2094 return; 2095 } 2096 2097 mos7840_port = mos7840_get_port_private(port); 2098 2099 if (mos7840_port == NULL) 2100 return; 2101 2102 if (!mos7840_port->open) { 2103 dbg("%s - port not opened", __func__); 2104 return; 2105 } 2106 2107 dbg("%s", "setting termios - "); 2108 2109 cflag = tty->termios->c_cflag; 2110 2111 dbg("%s - clfag %08x iflag %08x", __func__, 2112 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2113 dbg("%s - old clfag %08x old iflag %08x", __func__, 2114 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2115 dbg("%s - port %d", __func__, port->number); 2116 2117 /* change the port settings to the new ones specified */ 2118 2119 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2120 2121 if (!mos7840_port->read_urb) { 2122 dbg("%s", "URB KILLED !!!!!"); 2123 return; 2124 } 2125 2126 if (mos7840_port->read_urb_busy == false) { 2127 mos7840_port->read_urb->dev = serial->dev; 2128 mos7840_port->read_urb_busy = true; 2129 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2130 if (status) { 2131 dbg("usb_submit_urb(read bulk) failed, status = %d", 2132 status); 2133 mos7840_port->read_urb_busy = false; 2134 } 2135 } 2136 return; 2137 } 2138 2139 /***************************************************************************** 2140 * mos7840_get_lsr_info - get line status register info 2141 * 2142 * Purpose: Let user call ioctl() to get info when the UART physically 2143 * is emptied. On bus types like RS485, the transmitter must 2144 * release the bus after transmitting. This must be done when 2145 * the transmit shift register is empty, not be done when the 2146 * transmit holding register is empty. This functionality 2147 * allows an RS485 driver to be written in user space. 2148 *****************************************************************************/ 2149 2150 static int mos7840_get_lsr_info(struct tty_struct *tty, 2151 unsigned int __user *value) 2152 { 2153 int count; 2154 unsigned int result = 0; 2155 2156 count = mos7840_chars_in_buffer(tty); 2157 if (count == 0) { 2158 dbg("%s -- Empty", __func__); 2159 result = TIOCSER_TEMT; 2160 } 2161 2162 if (copy_to_user(value, &result, sizeof(int))) 2163 return -EFAULT; 2164 return 0; 2165 } 2166 2167 /***************************************************************************** 2168 * mos7840_get_serial_info 2169 * function to get information about serial port 2170 *****************************************************************************/ 2171 2172 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2173 struct serial_struct __user *retinfo) 2174 { 2175 struct serial_struct tmp; 2176 2177 if (mos7840_port == NULL) 2178 return -1; 2179 2180 if (!retinfo) 2181 return -EFAULT; 2182 2183 memset(&tmp, 0, sizeof(tmp)); 2184 2185 tmp.type = PORT_16550A; 2186 tmp.line = mos7840_port->port->serial->minor; 2187 tmp.port = mos7840_port->port->number; 2188 tmp.irq = 0; 2189 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2190 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2191 tmp.baud_base = 9600; 2192 tmp.close_delay = 5 * HZ; 2193 tmp.closing_wait = 30 * HZ; 2194 2195 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2196 return -EFAULT; 2197 return 0; 2198 } 2199 2200 /***************************************************************************** 2201 * SerialIoctl 2202 * this function handles any ioctl calls to the driver 2203 *****************************************************************************/ 2204 2205 static int mos7840_ioctl(struct tty_struct *tty, struct file *file, 2206 unsigned int cmd, unsigned long arg) 2207 { 2208 struct usb_serial_port *port = tty->driver_data; 2209 void __user *argp = (void __user *)arg; 2210 struct moschip_port *mos7840_port; 2211 2212 struct async_icount cnow; 2213 struct async_icount cprev; 2214 struct serial_icounter_struct icount; 2215 2216 if (mos7840_port_paranoia_check(port, __func__)) { 2217 dbg("%s", "Invalid port"); 2218 return -1; 2219 } 2220 2221 mos7840_port = mos7840_get_port_private(port); 2222 2223 if (mos7840_port == NULL) 2224 return -1; 2225 2226 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2227 2228 switch (cmd) { 2229 /* return number of bytes available */ 2230 2231 case TIOCSERGETLSR: 2232 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2233 return mos7840_get_lsr_info(tty, argp); 2234 return 0; 2235 2236 case TIOCGSERIAL: 2237 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2238 return mos7840_get_serial_info(mos7840_port, argp); 2239 2240 case TIOCSSERIAL: 2241 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2242 break; 2243 2244 case TIOCMIWAIT: 2245 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2246 cprev = mos7840_port->icount; 2247 while (1) { 2248 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2249 mos7840_port->delta_msr_cond = 0; 2250 wait_event_interruptible(mos7840_port->delta_msr_wait, 2251 (mos7840_port-> 2252 delta_msr_cond == 1)); 2253 2254 /* see if a signal did it */ 2255 if (signal_pending(current)) 2256 return -ERESTARTSYS; 2257 cnow = mos7840_port->icount; 2258 smp_rmb(); 2259 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2260 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2261 return -EIO; /* no change => error */ 2262 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2263 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2264 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2265 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2266 return 0; 2267 } 2268 cprev = cnow; 2269 } 2270 /* NOTREACHED */ 2271 break; 2272 2273 case TIOCGICOUNT: 2274 cnow = mos7840_port->icount; 2275 smp_rmb(); 2276 icount.cts = cnow.cts; 2277 icount.dsr = cnow.dsr; 2278 icount.rng = cnow.rng; 2279 icount.dcd = cnow.dcd; 2280 icount.rx = cnow.rx; 2281 icount.tx = cnow.tx; 2282 icount.frame = cnow.frame; 2283 icount.overrun = cnow.overrun; 2284 icount.parity = cnow.parity; 2285 icount.brk = cnow.brk; 2286 icount.buf_overrun = cnow.buf_overrun; 2287 2288 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2289 port->number, icount.rx, icount.tx); 2290 if (copy_to_user(argp, &icount, sizeof(icount))) 2291 return -EFAULT; 2292 return 0; 2293 default: 2294 break; 2295 } 2296 return -ENOIOCTLCMD; 2297 } 2298 2299 static int mos7840_calc_num_ports(struct usb_serial *serial) 2300 { 2301 int mos7840_num_ports = 0; 2302 2303 dbg("numberofendpoints: cur %d, alt %d", 2304 (int)serial->interface->cur_altsetting->desc.bNumEndpoints, 2305 (int)serial->interface->altsetting->desc.bNumEndpoints); 2306 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2307 mos7840_num_ports = serial->num_ports = 2; 2308 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2309 serial->num_bulk_in = 4; 2310 serial->num_bulk_out = 4; 2311 mos7840_num_ports = serial->num_ports = 4; 2312 } 2313 dbg ("mos7840_num_ports = %d", mos7840_num_ports); 2314 return mos7840_num_ports; 2315 } 2316 2317 /**************************************************************************** 2318 * mos7840_startup 2319 ****************************************************************************/ 2320 2321 static int mos7840_startup(struct usb_serial *serial) 2322 { 2323 struct moschip_port *mos7840_port; 2324 struct usb_device *dev; 2325 int i, status; 2326 2327 __u16 Data; 2328 dbg("%s", "mos7840_startup :Entering.........."); 2329 2330 if (!serial) { 2331 dbg("%s", "Invalid Handler"); 2332 return -1; 2333 } 2334 2335 dev = serial->dev; 2336 2337 dbg("%s", "Entering..."); 2338 dbg ("mos7840_startup: serial = %p", serial); 2339 2340 /* we set up the pointers to the endpoints in the mos7840_open * 2341 * function, as the structures aren't created yet. */ 2342 2343 /* set up port private structures */ 2344 for (i = 0; i < serial->num_ports; ++i) { 2345 dbg ("mos7840_startup: configuring port %d............", i); 2346 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2347 if (mos7840_port == NULL) { 2348 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2349 status = -ENOMEM; 2350 i--; /* don't follow NULL pointer cleaning up */ 2351 goto error; 2352 } 2353 2354 /* Initialize all port interrupt end point to port 0 int 2355 * endpoint. Our device has only one interrupt end point 2356 * common to all port */ 2357 2358 mos7840_port->port = serial->port[i]; 2359 mos7840_set_port_private(serial->port[i], mos7840_port); 2360 spin_lock_init(&mos7840_port->pool_lock); 2361 2362 /* minor is not initialised until later by 2363 * usb-serial.c:get_free_serial() and cannot therefore be used 2364 * to index device instances */ 2365 mos7840_port->port_num = i + 1; 2366 dbg ("serial->port[i]->number = %d", serial->port[i]->number); 2367 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); 2368 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); 2369 dbg ("serial->minor = %d", serial->minor); 2370 2371 if (mos7840_port->port_num == 1) { 2372 mos7840_port->SpRegOffset = 0x0; 2373 mos7840_port->ControlRegOffset = 0x1; 2374 mos7840_port->DcrRegOffset = 0x4; 2375 } else if ((mos7840_port->port_num == 2) 2376 && (serial->num_ports == 4)) { 2377 mos7840_port->SpRegOffset = 0x8; 2378 mos7840_port->ControlRegOffset = 0x9; 2379 mos7840_port->DcrRegOffset = 0x16; 2380 } else if ((mos7840_port->port_num == 2) 2381 && (serial->num_ports == 2)) { 2382 mos7840_port->SpRegOffset = 0xa; 2383 mos7840_port->ControlRegOffset = 0xb; 2384 mos7840_port->DcrRegOffset = 0x19; 2385 } else if ((mos7840_port->port_num == 3) 2386 && (serial->num_ports == 4)) { 2387 mos7840_port->SpRegOffset = 0xa; 2388 mos7840_port->ControlRegOffset = 0xb; 2389 mos7840_port->DcrRegOffset = 0x19; 2390 } else if ((mos7840_port->port_num == 4) 2391 && (serial->num_ports == 4)) { 2392 mos7840_port->SpRegOffset = 0xc; 2393 mos7840_port->ControlRegOffset = 0xd; 2394 mos7840_port->DcrRegOffset = 0x1c; 2395 } 2396 mos7840_dump_serial_port(mos7840_port); 2397 mos7840_set_port_private(serial->port[i], mos7840_port); 2398 2399 /* enable rx_disable bit in control register */ 2400 status = mos7840_get_reg_sync(serial->port[i], 2401 mos7840_port->ControlRegOffset, &Data); 2402 if (status < 0) { 2403 dbg("Reading ControlReg failed status-0x%x", status); 2404 break; 2405 } else 2406 dbg("ControlReg Reading success val is %x, status%d", 2407 Data, status); 2408 Data |= 0x08; /* setting driver done bit */ 2409 Data |= 0x04; /* sp1_bit to have cts change reflect in 2410 modem status reg */ 2411 2412 /* Data |= 0x20; //rx_disable bit */ 2413 status = mos7840_set_reg_sync(serial->port[i], 2414 mos7840_port->ControlRegOffset, Data); 2415 if (status < 0) { 2416 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); 2417 break; 2418 } else 2419 dbg("ControlReg Writing success(rx_disable) status%d", 2420 status); 2421 2422 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2423 and 0x24 in DCR3 */ 2424 Data = 0x01; 2425 status = mos7840_set_reg_sync(serial->port[i], 2426 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2427 if (status < 0) { 2428 dbg("Writing DCR0 failed status-0x%x", status); 2429 break; 2430 } else 2431 dbg("DCR0 Writing success status%d", status); 2432 2433 Data = 0x05; 2434 status = mos7840_set_reg_sync(serial->port[i], 2435 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2436 if (status < 0) { 2437 dbg("Writing DCR1 failed status-0x%x", status); 2438 break; 2439 } else 2440 dbg("DCR1 Writing success status%d", status); 2441 2442 Data = 0x24; 2443 status = mos7840_set_reg_sync(serial->port[i], 2444 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2445 if (status < 0) { 2446 dbg("Writing DCR2 failed status-0x%x", status); 2447 break; 2448 } else 2449 dbg("DCR2 Writing success status%d", status); 2450 2451 /* write values in clkstart0x0 and clkmulti 0x20 */ 2452 Data = 0x0; 2453 status = mos7840_set_reg_sync(serial->port[i], 2454 CLK_START_VALUE_REGISTER, Data); 2455 if (status < 0) { 2456 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); 2457 break; 2458 } else 2459 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); 2460 2461 Data = 0x20; 2462 status = mos7840_set_reg_sync(serial->port[i], 2463 CLK_MULTI_REGISTER, Data); 2464 if (status < 0) { 2465 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", 2466 status); 2467 goto error; 2468 } else 2469 dbg("CLK_MULTI_REGISTER Writing success status%d", 2470 status); 2471 2472 /* write value 0x0 to scratchpad register */ 2473 Data = 0x00; 2474 status = mos7840_set_uart_reg(serial->port[i], 2475 SCRATCH_PAD_REGISTER, Data); 2476 if (status < 0) { 2477 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", 2478 status); 2479 break; 2480 } else 2481 dbg("SCRATCH_PAD_REGISTER Writing success status%d", 2482 status); 2483 2484 /* Zero Length flag register */ 2485 if ((mos7840_port->port_num != 1) 2486 && (serial->num_ports == 2)) { 2487 2488 Data = 0xff; 2489 status = mos7840_set_reg_sync(serial->port[i], 2490 (__u16) (ZLP_REG1 + 2491 ((__u16)mos7840_port->port_num)), Data); 2492 dbg("ZLIP offset %x", 2493 (__u16) (ZLP_REG1 + 2494 ((__u16) mos7840_port->port_num))); 2495 if (status < 0) { 2496 dbg("Writing ZLP_REG%d failed status-0x%x", 2497 i + 2, status); 2498 break; 2499 } else 2500 dbg("ZLP_REG%d Writing success status%d", 2501 i + 2, status); 2502 } else { 2503 Data = 0xff; 2504 status = mos7840_set_reg_sync(serial->port[i], 2505 (__u16) (ZLP_REG1 + 2506 ((__u16)mos7840_port->port_num) - 0x1), Data); 2507 dbg("ZLIP offset %x", 2508 (__u16) (ZLP_REG1 + 2509 ((__u16) mos7840_port->port_num) - 0x1)); 2510 if (status < 0) { 2511 dbg("Writing ZLP_REG%d failed status-0x%x", 2512 i + 1, status); 2513 break; 2514 } else 2515 dbg("ZLP_REG%d Writing success status%d", 2516 i + 1, status); 2517 2518 } 2519 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2520 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2521 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2522 GFP_KERNEL); 2523 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2524 !mos7840_port->dr) { 2525 status = -ENOMEM; 2526 goto error; 2527 } 2528 } 2529 dbg ("mos7840_startup: all ports configured..........."); 2530 2531 /* Zero Length flag enable */ 2532 Data = 0x0f; 2533 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2534 if (status < 0) { 2535 dbg("Writing ZLP_REG5 failed status-0x%x", status); 2536 goto error; 2537 } else 2538 dbg("ZLP_REG5 Writing success status%d", status); 2539 2540 /* setting configuration feature to one */ 2541 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2542 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2543 return 0; 2544 error: 2545 for (/* nothing */; i >= 0; i--) { 2546 mos7840_port = mos7840_get_port_private(serial->port[i]); 2547 2548 kfree(mos7840_port->dr); 2549 kfree(mos7840_port->ctrl_buf); 2550 usb_free_urb(mos7840_port->control_urb); 2551 kfree(mos7840_port); 2552 serial->port[i] = NULL; 2553 } 2554 return status; 2555 } 2556 2557 /**************************************************************************** 2558 * mos7840_disconnect 2559 * This function is called whenever the device is removed from the usb bus. 2560 ****************************************************************************/ 2561 2562 static void mos7840_disconnect(struct usb_serial *serial) 2563 { 2564 int i; 2565 unsigned long flags; 2566 struct moschip_port *mos7840_port; 2567 dbg("%s", " disconnect :entering.........."); 2568 2569 if (!serial) { 2570 dbg("%s", "Invalid Handler"); 2571 return; 2572 } 2573 2574 /* check for the ports to be closed,close the ports and disconnect */ 2575 2576 /* free private structure allocated for serial port * 2577 * stop reads and writes on all ports */ 2578 2579 for (i = 0; i < serial->num_ports; ++i) { 2580 mos7840_port = mos7840_get_port_private(serial->port[i]); 2581 dbg ("mos7840_port %d = %p", i, mos7840_port); 2582 if (mos7840_port) { 2583 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2584 mos7840_port->zombie = 1; 2585 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2586 usb_kill_urb(mos7840_port->control_urb); 2587 } 2588 } 2589 2590 dbg("%s", "Thank u :: "); 2591 2592 } 2593 2594 /**************************************************************************** 2595 * mos7840_release 2596 * This function is called when the usb_serial structure is freed. 2597 ****************************************************************************/ 2598 2599 static void mos7840_release(struct usb_serial *serial) 2600 { 2601 int i; 2602 struct moschip_port *mos7840_port; 2603 dbg("%s", " release :entering.........."); 2604 2605 if (!serial) { 2606 dbg("%s", "Invalid Handler"); 2607 return; 2608 } 2609 2610 /* check for the ports to be closed,close the ports and disconnect */ 2611 2612 /* free private structure allocated for serial port * 2613 * stop reads and writes on all ports */ 2614 2615 for (i = 0; i < serial->num_ports; ++i) { 2616 mos7840_port = mos7840_get_port_private(serial->port[i]); 2617 dbg("mos7840_port %d = %p", i, mos7840_port); 2618 if (mos7840_port) { 2619 kfree(mos7840_port->ctrl_buf); 2620 kfree(mos7840_port->dr); 2621 kfree(mos7840_port); 2622 } 2623 } 2624 2625 dbg("%s", "Thank u :: "); 2626 2627 } 2628 2629 static struct usb_driver io_driver = { 2630 .name = "mos7840", 2631 .probe = usb_serial_probe, 2632 .disconnect = usb_serial_disconnect, 2633 .id_table = moschip_id_table_combined, 2634 .no_dynamic_id = 1, 2635 }; 2636 2637 static struct usb_serial_driver moschip7840_4port_device = { 2638 .driver = { 2639 .owner = THIS_MODULE, 2640 .name = "mos7840", 2641 }, 2642 .description = DRIVER_DESC, 2643 .usb_driver = &io_driver, 2644 .id_table = moschip_port_id_table, 2645 .num_ports = 4, 2646 .open = mos7840_open, 2647 .close = mos7840_close, 2648 .write = mos7840_write, 2649 .write_room = mos7840_write_room, 2650 .chars_in_buffer = mos7840_chars_in_buffer, 2651 .throttle = mos7840_throttle, 2652 .unthrottle = mos7840_unthrottle, 2653 .calc_num_ports = mos7840_calc_num_ports, 2654 #ifdef MCSSerialProbe 2655 .probe = mos7840_serial_probe, 2656 #endif 2657 .ioctl = mos7840_ioctl, 2658 .set_termios = mos7840_set_termios, 2659 .break_ctl = mos7840_break, 2660 .tiocmget = mos7840_tiocmget, 2661 .tiocmset = mos7840_tiocmset, 2662 .attach = mos7840_startup, 2663 .disconnect = mos7840_disconnect, 2664 .release = mos7840_release, 2665 .read_bulk_callback = mos7840_bulk_in_callback, 2666 .read_int_callback = mos7840_interrupt_callback, 2667 }; 2668 2669 /**************************************************************************** 2670 * moschip7840_init 2671 * This is called by the module subsystem, or on startup to initialize us 2672 ****************************************************************************/ 2673 static int __init moschip7840_init(void) 2674 { 2675 int retval; 2676 2677 dbg("%s", " mos7840_init :entering.........."); 2678 2679 /* Register with the usb serial */ 2680 retval = usb_serial_register(&moschip7840_4port_device); 2681 2682 if (retval) 2683 goto failed_port_device_register; 2684 2685 dbg("%s", "Entering..."); 2686 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2687 DRIVER_DESC "\n"); 2688 2689 /* Register with the usb */ 2690 retval = usb_register(&io_driver); 2691 if (retval == 0) { 2692 dbg("%s", "Leaving..."); 2693 return 0; 2694 } 2695 usb_serial_deregister(&moschip7840_4port_device); 2696 failed_port_device_register: 2697 return retval; 2698 } 2699 2700 /**************************************************************************** 2701 * moschip7840_exit 2702 * Called when the driver is about to be unloaded. 2703 ****************************************************************************/ 2704 static void __exit moschip7840_exit(void) 2705 { 2706 2707 dbg("%s", " mos7840_exit :entering.........."); 2708 2709 usb_deregister(&io_driver); 2710 2711 usb_serial_deregister(&moschip7840_4port_device); 2712 2713 dbg("%s", "Entering..."); 2714 } 2715 2716 module_init(moschip7840_init); 2717 module_exit(moschip7840_exit); 2718 2719 /* Module information */ 2720 MODULE_DESCRIPTION(DRIVER_DESC); 2721 MODULE_LICENSE("GPL"); 2722 2723 module_param(debug, bool, S_IRUGO | S_IWUSR); 2724 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2725