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