1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 15 * 16 * Clean ups from Moschip version and a few ioctl implementations by: 17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 18 * 19 * Originally based on drivers/usb/serial/io_edgeport.c which is: 20 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 22 * 23 */ 24 25 #include <linux/kernel.h> 26 #include <linux/errno.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/tty.h> 30 #include <linux/tty_driver.h> 31 #include <linux/tty_flip.h> 32 #include <linux/module.h> 33 #include <linux/serial.h> 34 #include <linux/usb.h> 35 #include <linux/usb/serial.h> 36 #include <linux/uaccess.h> 37 38 /* 39 * Version Information 40 */ 41 #define DRIVER_VERSION "1.3.2" 42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 43 44 /* 45 * 16C50 UART register defines 46 */ 47 48 #define LCR_BITS_5 0x00 /* 5 bits/char */ 49 #define LCR_BITS_6 0x01 /* 6 bits/char */ 50 #define LCR_BITS_7 0x02 /* 7 bits/char */ 51 #define LCR_BITS_8 0x03 /* 8 bits/char */ 52 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 53 54 #define LCR_STOP_1 0x00 /* 1 stop bit */ 55 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 56 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 57 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 58 59 #define LCR_PAR_NONE 0x00 /* No parity */ 60 #define LCR_PAR_ODD 0x08 /* Odd parity */ 61 #define LCR_PAR_EVEN 0x18 /* Even parity */ 62 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 63 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 64 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 65 66 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 68 69 #define MCR_DTR 0x01 /* Assert DTR */ 70 #define MCR_RTS 0x02 /* Assert RTS */ 71 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 72 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 73 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 74 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 75 76 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 77 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 78 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 79 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 80 81 /* 82 * Defines used for sending commands to port 83 */ 84 85 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */ 86 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */ 87 88 #define MOS_PORT1 0x0200 89 #define MOS_PORT2 0x0300 90 #define MOS_VENREG 0x0000 91 #define MOS_MAX_PORT 0x02 92 #define MOS_WRITE 0x0E 93 #define MOS_READ 0x0D 94 95 /* Requests */ 96 #define MCS_RD_RTYPE 0xC0 97 #define MCS_WR_RTYPE 0x40 98 #define MCS_RDREQ 0x0D 99 #define MCS_WRREQ 0x0E 100 #define MCS_CTRL_TIMEOUT 500 101 #define VENDOR_READ_LENGTH (0x01) 102 103 #define MAX_NAME_LEN 64 104 105 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 106 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 107 108 /* For higher baud Rates use TIOCEXBAUD */ 109 #define TIOCEXBAUD 0x5462 110 111 /* vendor id and device id defines */ 112 113 /* The native mos7840/7820 component */ 114 #define USB_VENDOR_ID_MOSCHIP 0x9710 115 #define MOSCHIP_DEVICE_ID_7840 0x7840 116 #define MOSCHIP_DEVICE_ID_7820 0x7820 117 /* The native component can have its vendor/device id's overridden 118 * in vendor-specific implementations. Such devices can be handled 119 * by making a change here, in moschip_port_id_table, and in 120 * moschip_id_table_combined 121 */ 122 #define USB_VENDOR_ID_BANDB 0x0856 123 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 124 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 125 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 126 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 127 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 128 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 129 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 130 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 131 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 132 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 133 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 134 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 135 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 136 137 /* This driver also supports 138 * ATEN UC2324 device using Moschip MCS7840 139 * ATEN UC2322 device using Moschip MCS7820 140 */ 141 #define USB_VENDOR_ID_ATENINTL 0x0557 142 #define ATENINTL_DEVICE_ID_UC2324 0x2011 143 #define ATENINTL_DEVICE_ID_UC2322 0x7820 144 145 /* Interrupt Routine Defines */ 146 147 #define SERIAL_IIR_RLS 0x06 148 #define SERIAL_IIR_MS 0x00 149 150 /* 151 * Emulation of the bit mask on the LINE STATUS REGISTER. 152 */ 153 #define SERIAL_LSR_DR 0x0001 154 #define SERIAL_LSR_OE 0x0002 155 #define SERIAL_LSR_PE 0x0004 156 #define SERIAL_LSR_FE 0x0008 157 #define SERIAL_LSR_BI 0x0010 158 159 #define MOS_MSR_DELTA_CTS 0x10 160 #define MOS_MSR_DELTA_DSR 0x20 161 #define MOS_MSR_DELTA_RI 0x40 162 #define MOS_MSR_DELTA_CD 0x80 163 164 /* Serial Port register Address */ 165 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 166 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 167 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 168 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 169 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 170 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 171 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 172 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 173 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 174 175 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 176 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 177 178 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 179 180 /* 181 * URB POOL related defines 182 */ 183 #define NUM_URBS 16 /* URB Count */ 184 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 185 186 187 static const struct usb_device_id moschip_port_id_table[] = { 188 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 190 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 203 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 204 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 205 {} /* terminating entry */ 206 }; 207 208 static const struct usb_device_id moschip_id_table_combined[] __devinitconst = { 209 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 210 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 211 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 212 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 213 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 214 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 215 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 216 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 217 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 218 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 219 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 220 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 221 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 222 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 223 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 224 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 225 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 226 {} /* terminating entry */ 227 }; 228 229 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); 230 231 /* This structure holds all of the local port information */ 232 233 struct moschip_port { 234 int port_num; /*Actual port number in the device(1,2,etc) */ 235 struct urb *write_urb; /* write URB for this port */ 236 struct urb *read_urb; /* read URB for this port */ 237 struct urb *int_urb; 238 __u8 shadowLCR; /* last LCR value received */ 239 __u8 shadowMCR; /* last MCR value received */ 240 char open; 241 char open_ports; 242 char zombie; 243 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 244 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 245 int delta_msr_cond; 246 struct async_icount icount; 247 struct usb_serial_port *port; /* loop back to the owner of this object */ 248 249 /* Offsets */ 250 __u8 SpRegOffset; 251 __u8 ControlRegOffset; 252 __u8 DcrRegOffset; 253 /* for processing control URBS in interrupt context */ 254 struct urb *control_urb; 255 struct usb_ctrlrequest *dr; 256 char *ctrl_buf; 257 int MsrLsr; 258 259 spinlock_t pool_lock; 260 struct urb *write_urb_pool[NUM_URBS]; 261 char busy[NUM_URBS]; 262 bool read_urb_busy; 263 }; 264 265 266 static bool debug; 267 268 /* 269 * mos7840_set_reg_sync 270 * To set the Control register by calling usb_fill_control_urb function 271 * by passing usb_sndctrlpipe function as parameter. 272 */ 273 274 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 275 __u16 val) 276 { 277 struct usb_device *dev = port->serial->dev; 278 val = val & 0x00ff; 279 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val); 280 281 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 282 MCS_WR_RTYPE, val, reg, NULL, 0, 283 MOS_WDR_TIMEOUT); 284 } 285 286 /* 287 * mos7840_get_reg_sync 288 * To set the Uart register by calling usb_fill_control_urb function by 289 * passing usb_rcvctrlpipe function as parameter. 290 */ 291 292 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 293 __u16 *val) 294 { 295 struct usb_device *dev = port->serial->dev; 296 int ret = 0; 297 u8 *buf; 298 299 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 300 if (!buf) 301 return -ENOMEM; 302 303 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 304 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 305 MOS_WDR_TIMEOUT); 306 *val = buf[0]; 307 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); 308 309 kfree(buf); 310 return ret; 311 } 312 313 /* 314 * mos7840_set_uart_reg 315 * To set the Uart register by calling usb_fill_control_urb function by 316 * passing usb_sndctrlpipe function as parameter. 317 */ 318 319 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 320 __u16 val) 321 { 322 323 struct usb_device *dev = port->serial->dev; 324 val = val & 0x00ff; 325 /* For the UART control registers, the application number need 326 to be Or'ed */ 327 if (port->serial->num_ports == 4) { 328 val |= (((__u16) port->number - 329 (__u16) (port->serial->minor)) + 1) << 8; 330 dbg("mos7840_set_uart_reg application number is %x", val); 331 } else { 332 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 333 val |= (((__u16) port->number - 334 (__u16) (port->serial->minor)) + 1) << 8; 335 dbg("mos7840_set_uart_reg application number is %x", 336 val); 337 } else { 338 val |= 339 (((__u16) port->number - 340 (__u16) (port->serial->minor)) + 2) << 8; 341 dbg("mos7840_set_uart_reg application number is %x", 342 val); 343 } 344 } 345 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 346 MCS_WR_RTYPE, val, reg, NULL, 0, 347 MOS_WDR_TIMEOUT); 348 349 } 350 351 /* 352 * mos7840_get_uart_reg 353 * To set the Control register by calling usb_fill_control_urb function 354 * by passing usb_rcvctrlpipe function as parameter. 355 */ 356 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 357 __u16 *val) 358 { 359 struct usb_device *dev = port->serial->dev; 360 int ret = 0; 361 __u16 Wval; 362 u8 *buf; 363 364 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 365 if (!buf) 366 return -ENOMEM; 367 368 /* dbg("application number is %4x", 369 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ 370 /* Wval is same as application number */ 371 if (port->serial->num_ports == 4) { 372 Wval = 373 (((__u16) port->number - (__u16) (port->serial->minor)) + 374 1) << 8; 375 dbg("mos7840_get_uart_reg application number is %x", Wval); 376 } else { 377 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 378 Wval = (((__u16) port->number - 379 (__u16) (port->serial->minor)) + 1) << 8; 380 dbg("mos7840_get_uart_reg application number is %x", 381 Wval); 382 } else { 383 Wval = (((__u16) port->number - 384 (__u16) (port->serial->minor)) + 2) << 8; 385 dbg("mos7840_get_uart_reg application number is %x", 386 Wval); 387 } 388 } 389 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 390 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 391 MOS_WDR_TIMEOUT); 392 *val = buf[0]; 393 394 kfree(buf); 395 return ret; 396 } 397 398 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 399 { 400 401 dbg("***************************************"); 402 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset); 403 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset); 404 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset); 405 dbg("***************************************"); 406 407 } 408 409 /************************************************************************/ 410 /************************************************************************/ 411 /* I N T E R F A C E F U N C T I O N S */ 412 /* I N T E R F A C E F U N C T I O N S */ 413 /************************************************************************/ 414 /************************************************************************/ 415 416 static inline void mos7840_set_port_private(struct usb_serial_port *port, 417 struct moschip_port *data) 418 { 419 usb_set_serial_port_data(port, (void *)data); 420 } 421 422 static inline struct moschip_port *mos7840_get_port_private(struct 423 usb_serial_port 424 *port) 425 { 426 return (struct moschip_port *)usb_get_serial_port_data(port); 427 } 428 429 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 430 { 431 struct moschip_port *mos7840_port; 432 struct async_icount *icount; 433 mos7840_port = port; 434 icount = &mos7840_port->icount; 435 if (new_msr & 436 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 437 MOS_MSR_DELTA_CD)) { 438 icount = &mos7840_port->icount; 439 440 /* update input line counters */ 441 if (new_msr & MOS_MSR_DELTA_CTS) { 442 icount->cts++; 443 smp_wmb(); 444 } 445 if (new_msr & MOS_MSR_DELTA_DSR) { 446 icount->dsr++; 447 smp_wmb(); 448 } 449 if (new_msr & MOS_MSR_DELTA_CD) { 450 icount->dcd++; 451 smp_wmb(); 452 } 453 if (new_msr & MOS_MSR_DELTA_RI) { 454 icount->rng++; 455 smp_wmb(); 456 } 457 } 458 } 459 460 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 461 { 462 struct async_icount *icount; 463 464 dbg("%s - %02x", __func__, new_lsr); 465 466 if (new_lsr & SERIAL_LSR_BI) { 467 /* 468 * Parity and Framing errors only count if they 469 * occur exclusive of a break being 470 * received. 471 */ 472 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 473 } 474 475 /* update input line counters */ 476 icount = &port->icount; 477 if (new_lsr & SERIAL_LSR_BI) { 478 icount->brk++; 479 smp_wmb(); 480 } 481 if (new_lsr & SERIAL_LSR_OE) { 482 icount->overrun++; 483 smp_wmb(); 484 } 485 if (new_lsr & SERIAL_LSR_PE) { 486 icount->parity++; 487 smp_wmb(); 488 } 489 if (new_lsr & SERIAL_LSR_FE) { 490 icount->frame++; 491 smp_wmb(); 492 } 493 } 494 495 /************************************************************************/ 496 /************************************************************************/ 497 /* U S B C A L L B A C K F U N C T I O N S */ 498 /* U S B C A L L B A C K F U N C T I O N S */ 499 /************************************************************************/ 500 /************************************************************************/ 501 502 static void mos7840_control_callback(struct urb *urb) 503 { 504 unsigned char *data; 505 struct moschip_port *mos7840_port; 506 __u8 regval = 0x0; 507 int result = 0; 508 int status = urb->status; 509 510 mos7840_port = urb->context; 511 512 switch (status) { 513 case 0: 514 /* success */ 515 break; 516 case -ECONNRESET: 517 case -ENOENT: 518 case -ESHUTDOWN: 519 /* this urb is terminated, clean up */ 520 dbg("%s - urb shutting down with status: %d", __func__, 521 status); 522 return; 523 default: 524 dbg("%s - nonzero urb status received: %d", __func__, 525 status); 526 goto exit; 527 } 528 529 dbg("%s urb buffer size is %d", __func__, urb->actual_length); 530 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__, 531 mos7840_port->MsrLsr, mos7840_port->port_num); 532 data = urb->transfer_buffer; 533 regval = (__u8) data[0]; 534 dbg("%s data is %x", __func__, regval); 535 if (mos7840_port->MsrLsr == 0) 536 mos7840_handle_new_msr(mos7840_port, regval); 537 else if (mos7840_port->MsrLsr == 1) 538 mos7840_handle_new_lsr(mos7840_port, regval); 539 540 exit: 541 spin_lock(&mos7840_port->pool_lock); 542 if (!mos7840_port->zombie) 543 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 544 spin_unlock(&mos7840_port->pool_lock); 545 if (result) { 546 dev_err(&urb->dev->dev, 547 "%s - Error %d submitting interrupt urb\n", 548 __func__, result); 549 } 550 } 551 552 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 553 __u16 *val) 554 { 555 struct usb_device *dev = mcs->port->serial->dev; 556 struct usb_ctrlrequest *dr = mcs->dr; 557 unsigned char *buffer = mcs->ctrl_buf; 558 int ret; 559 560 dr->bRequestType = MCS_RD_RTYPE; 561 dr->bRequest = MCS_RDREQ; 562 dr->wValue = cpu_to_le16(Wval); /* 0 */ 563 dr->wIndex = cpu_to_le16(reg); 564 dr->wLength = cpu_to_le16(2); 565 566 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 567 (unsigned char *)dr, buffer, 2, 568 mos7840_control_callback, mcs); 569 mcs->control_urb->transfer_buffer_length = 2; 570 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 571 return ret; 572 } 573 574 /***************************************************************************** 575 * mos7840_interrupt_callback 576 * this is the callback function for when we have received data on the 577 * interrupt endpoint. 578 *****************************************************************************/ 579 580 static void mos7840_interrupt_callback(struct urb *urb) 581 { 582 int result; 583 int length; 584 struct moschip_port *mos7840_port; 585 struct usb_serial *serial; 586 __u16 Data; 587 unsigned char *data; 588 __u8 sp[5], st; 589 int i, rv = 0; 590 __u16 wval, wreg = 0; 591 int status = urb->status; 592 593 dbg("%s", " : Entering"); 594 595 switch (status) { 596 case 0: 597 /* success */ 598 break; 599 case -ECONNRESET: 600 case -ENOENT: 601 case -ESHUTDOWN: 602 /* this urb is terminated, clean up */ 603 dbg("%s - urb shutting down with status: %d", __func__, 604 status); 605 return; 606 default: 607 dbg("%s - nonzero urb status received: %d", __func__, 608 status); 609 goto exit; 610 } 611 612 length = urb->actual_length; 613 data = urb->transfer_buffer; 614 615 serial = urb->context; 616 617 /* Moschip get 5 bytes 618 * Byte 1 IIR Port 1 (port.number is 0) 619 * Byte 2 IIR Port 2 (port.number is 1) 620 * Byte 3 IIR Port 3 (port.number is 2) 621 * Byte 4 IIR Port 4 (port.number is 3) 622 * Byte 5 FIFO status for both */ 623 624 if (length && length > 5) { 625 dbg("%s", "Wrong data !!!"); 626 return; 627 } 628 629 sp[0] = (__u8) data[0]; 630 sp[1] = (__u8) data[1]; 631 sp[2] = (__u8) data[2]; 632 sp[3] = (__u8) data[3]; 633 st = (__u8) data[4]; 634 635 for (i = 0; i < serial->num_ports; i++) { 636 mos7840_port = mos7840_get_port_private(serial->port[i]); 637 wval = 638 (((__u16) serial->port[i]->number - 639 (__u16) (serial->minor)) + 1) << 8; 640 if (mos7840_port->open) { 641 if (sp[i] & 0x01) { 642 dbg("SP%d No Interrupt !!!", i); 643 } else { 644 switch (sp[i] & 0x0f) { 645 case SERIAL_IIR_RLS: 646 dbg("Serial Port %d: Receiver status error or ", i); 647 dbg("address bit detected in 9-bit mode"); 648 mos7840_port->MsrLsr = 1; 649 wreg = LINE_STATUS_REGISTER; 650 break; 651 case SERIAL_IIR_MS: 652 dbg("Serial Port %d: Modem status change", i); 653 mos7840_port->MsrLsr = 0; 654 wreg = MODEM_STATUS_REGISTER; 655 break; 656 } 657 spin_lock(&mos7840_port->pool_lock); 658 if (!mos7840_port->zombie) { 659 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 660 } else { 661 spin_unlock(&mos7840_port->pool_lock); 662 return; 663 } 664 spin_unlock(&mos7840_port->pool_lock); 665 } 666 } 667 } 668 if (!(rv < 0)) 669 /* the completion handler for the control urb will resubmit */ 670 return; 671 exit: 672 result = usb_submit_urb(urb, GFP_ATOMIC); 673 if (result) { 674 dev_err(&urb->dev->dev, 675 "%s - Error %d submitting interrupt urb\n", 676 __func__, result); 677 } 678 } 679 680 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 681 const char *function) 682 { 683 if (!port) { 684 dbg("%s - port == NULL", function); 685 return -1; 686 } 687 if (!port->serial) { 688 dbg("%s - port->serial == NULL", function); 689 return -1; 690 } 691 692 return 0; 693 } 694 695 /* Inline functions to check the sanity of a pointer that is passed to us */ 696 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 697 const char *function) 698 { 699 if (!serial) { 700 dbg("%s - serial == NULL", function); 701 return -1; 702 } 703 if (!serial->type) { 704 dbg("%s - serial->type == NULL!", function); 705 return -1; 706 } 707 708 return 0; 709 } 710 711 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 712 const char *function) 713 { 714 /* if no port was specified, or it fails a paranoia check */ 715 if (!port || 716 mos7840_port_paranoia_check(port, function) || 717 mos7840_serial_paranoia_check(port->serial, function)) { 718 /* then say that we don't have a valid usb_serial thing, 719 * which will end up genrating -ENODEV return values */ 720 return NULL; 721 } 722 723 return port->serial; 724 } 725 726 /***************************************************************************** 727 * mos7840_bulk_in_callback 728 * this is the callback function for when we have received data on the 729 * bulk in endpoint. 730 *****************************************************************************/ 731 732 static void mos7840_bulk_in_callback(struct urb *urb) 733 { 734 int retval; 735 unsigned char *data; 736 struct usb_serial *serial; 737 struct usb_serial_port *port; 738 struct moschip_port *mos7840_port; 739 struct tty_struct *tty; 740 int status = urb->status; 741 742 mos7840_port = urb->context; 743 if (!mos7840_port) { 744 dbg("%s", "NULL mos7840_port pointer"); 745 return; 746 } 747 748 if (status) { 749 dbg("nonzero read bulk status received: %d", status); 750 mos7840_port->read_urb_busy = false; 751 return; 752 } 753 754 port = (struct usb_serial_port *)mos7840_port->port; 755 if (mos7840_port_paranoia_check(port, __func__)) { 756 dbg("%s", "Port Paranoia failed"); 757 mos7840_port->read_urb_busy = false; 758 return; 759 } 760 761 serial = mos7840_get_usb_serial(port, __func__); 762 if (!serial) { 763 dbg("%s", "Bad serial pointer"); 764 mos7840_port->read_urb_busy = false; 765 return; 766 } 767 768 dbg("%s", "Entering... "); 769 770 data = urb->transfer_buffer; 771 772 dbg("%s", "Entering ..........."); 773 774 if (urb->actual_length) { 775 tty = tty_port_tty_get(&mos7840_port->port->port); 776 if (tty) { 777 tty_insert_flip_string(tty, data, urb->actual_length); 778 dbg(" %s ", data); 779 tty_flip_buffer_push(tty); 780 tty_kref_put(tty); 781 } 782 mos7840_port->icount.rx += urb->actual_length; 783 smp_wmb(); 784 dbg("mos7840_port->icount.rx is %d:", 785 mos7840_port->icount.rx); 786 } 787 788 if (!mos7840_port->read_urb) { 789 dbg("%s", "URB KILLED !!!"); 790 mos7840_port->read_urb_busy = false; 791 return; 792 } 793 794 795 mos7840_port->read_urb_busy = true; 796 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 797 798 if (retval) { 799 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); 800 mos7840_port->read_urb_busy = false; 801 } 802 } 803 804 /***************************************************************************** 805 * mos7840_bulk_out_data_callback 806 * this is the callback function for when we have finished sending 807 * serial data on the bulk out endpoint. 808 *****************************************************************************/ 809 810 static void mos7840_bulk_out_data_callback(struct urb *urb) 811 { 812 struct moschip_port *mos7840_port; 813 struct tty_struct *tty; 814 int status = urb->status; 815 int i; 816 817 mos7840_port = urb->context; 818 spin_lock(&mos7840_port->pool_lock); 819 for (i = 0; i < NUM_URBS; i++) { 820 if (urb == mos7840_port->write_urb_pool[i]) { 821 mos7840_port->busy[i] = 0; 822 break; 823 } 824 } 825 spin_unlock(&mos7840_port->pool_lock); 826 827 if (status) { 828 dbg("nonzero write bulk status received:%d", status); 829 return; 830 } 831 832 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { 833 dbg("%s", "Port Paranoia failed"); 834 return; 835 } 836 837 dbg("%s", "Entering ........."); 838 839 tty = tty_port_tty_get(&mos7840_port->port->port); 840 if (tty && mos7840_port->open) 841 tty_wakeup(tty); 842 tty_kref_put(tty); 843 844 } 845 846 /************************************************************************/ 847 /* 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 */ 848 /************************************************************************/ 849 #ifdef MCSSerialProbe 850 static int mos7840_serial_probe(struct usb_serial *serial, 851 const struct usb_device_id *id) 852 { 853 854 /*need to implement the mode_reg reading and updating\ 855 structures usb_serial_ device_type\ 856 (i.e num_ports, num_bulkin,bulkout etc) */ 857 /* Also we can update the changes attach */ 858 return 1; 859 } 860 #endif 861 862 /***************************************************************************** 863 * mos7840_open 864 * this function is called by the tty driver when a port is opened 865 * If successful, we return 0 866 * Otherwise we return a negative error number. 867 *****************************************************************************/ 868 869 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 870 { 871 int response; 872 int j; 873 struct usb_serial *serial; 874 struct urb *urb; 875 __u16 Data; 876 int status; 877 struct moschip_port *mos7840_port; 878 struct moschip_port *port0; 879 880 dbg ("%s enter", __func__); 881 882 if (mos7840_port_paranoia_check(port, __func__)) { 883 dbg("%s", "Port Paranoia failed"); 884 return -ENODEV; 885 } 886 887 serial = port->serial; 888 889 if (mos7840_serial_paranoia_check(serial, __func__)) { 890 dbg("%s", "Serial Paranoia failed"); 891 return -ENODEV; 892 } 893 894 mos7840_port = mos7840_get_port_private(port); 895 port0 = mos7840_get_port_private(serial->port[0]); 896 897 if (mos7840_port == NULL || port0 == NULL) 898 return -ENODEV; 899 900 usb_clear_halt(serial->dev, port->write_urb->pipe); 901 usb_clear_halt(serial->dev, port->read_urb->pipe); 902 port0->open_ports++; 903 904 /* Initialising the write urb pool */ 905 for (j = 0; j < NUM_URBS; ++j) { 906 urb = usb_alloc_urb(0, GFP_KERNEL); 907 mos7840_port->write_urb_pool[j] = urb; 908 909 if (urb == NULL) { 910 dev_err(&port->dev, "No more urbs???\n"); 911 continue; 912 } 913 914 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 915 GFP_KERNEL); 916 if (!urb->transfer_buffer) { 917 usb_free_urb(urb); 918 mos7840_port->write_urb_pool[j] = NULL; 919 dev_err(&port->dev, 920 "%s-out of memory for urb buffers.\n", 921 __func__); 922 continue; 923 } 924 } 925 926 /***************************************************************************** 927 * Initialize MCS7840 -- Write Init values to corresponding Registers 928 * 929 * Register Index 930 * 1 : IER 931 * 2 : FCR 932 * 3 : LCR 933 * 4 : MCR 934 * 935 * 0x08 : SP1/2 Control Reg 936 *****************************************************************************/ 937 938 /* NEED to check the following Block */ 939 940 Data = 0x0; 941 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 942 if (status < 0) { 943 dbg("Reading Spreg failed"); 944 return -1; 945 } 946 Data |= 0x80; 947 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 948 if (status < 0) { 949 dbg("writing Spreg failed"); 950 return -1; 951 } 952 953 Data &= ~0x80; 954 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 955 if (status < 0) { 956 dbg("writing Spreg failed"); 957 return -1; 958 } 959 /* End of block to be checked */ 960 961 Data = 0x0; 962 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 963 &Data); 964 if (status < 0) { 965 dbg("Reading Controlreg failed"); 966 return -1; 967 } 968 Data |= 0x08; /* Driver done bit */ 969 Data |= 0x20; /* rx_disable */ 970 status = mos7840_set_reg_sync(port, 971 mos7840_port->ControlRegOffset, Data); 972 if (status < 0) { 973 dbg("writing Controlreg failed"); 974 return -1; 975 } 976 /* do register settings here */ 977 /* Set all regs to the device default values. */ 978 /*********************************** 979 * First Disable all interrupts. 980 ***********************************/ 981 Data = 0x00; 982 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 983 if (status < 0) { 984 dbg("disabling interrupts failed"); 985 return -1; 986 } 987 /* Set FIFO_CONTROL_REGISTER to the default value */ 988 Data = 0x00; 989 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 990 if (status < 0) { 991 dbg("Writing FIFO_CONTROL_REGISTER failed"); 992 return -1; 993 } 994 995 Data = 0xcf; 996 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 997 if (status < 0) { 998 dbg("Writing FIFO_CONTROL_REGISTER failed"); 999 return -1; 1000 } 1001 1002 Data = 0x03; 1003 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1004 mos7840_port->shadowLCR = Data; 1005 1006 Data = 0x0b; 1007 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1008 mos7840_port->shadowMCR = Data; 1009 1010 Data = 0x00; 1011 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1012 mos7840_port->shadowLCR = Data; 1013 1014 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1015 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1016 1017 Data = 0x0c; 1018 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1019 1020 Data = 0x0; 1021 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1022 1023 Data = 0x00; 1024 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1025 1026 Data = Data & ~SERIAL_LCR_DLAB; 1027 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1028 mos7840_port->shadowLCR = Data; 1029 1030 /* clearing Bulkin and Bulkout Fifo */ 1031 Data = 0x0; 1032 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1033 1034 Data = Data | 0x0c; 1035 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1036 1037 Data = Data & ~0x0c; 1038 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1039 /* Finally enable all interrupts */ 1040 Data = 0x0c; 1041 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1042 1043 /* clearing rx_disable */ 1044 Data = 0x0; 1045 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1046 &Data); 1047 Data = Data & ~0x20; 1048 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1049 Data); 1050 1051 /* rx_negate */ 1052 Data = 0x0; 1053 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1054 &Data); 1055 Data = Data | 0x10; 1056 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1057 Data); 1058 1059 /* Check to see if we've set up our endpoint info yet * 1060 * (can't set it up in mos7840_startup as the structures * 1061 * were not set up at that time.) */ 1062 if (port0->open_ports == 1) { 1063 if (serial->port[0]->interrupt_in_buffer == NULL) { 1064 /* set up interrupt urb */ 1065 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1066 serial->dev, 1067 usb_rcvintpipe(serial->dev, 1068 serial->port[0]->interrupt_in_endpointAddress), 1069 serial->port[0]->interrupt_in_buffer, 1070 serial->port[0]->interrupt_in_urb-> 1071 transfer_buffer_length, 1072 mos7840_interrupt_callback, 1073 serial, 1074 serial->port[0]->interrupt_in_urb->interval); 1075 1076 /* start interrupt read for mos7840 * 1077 * will continue as long as mos7840 is connected */ 1078 1079 response = 1080 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1081 GFP_KERNEL); 1082 if (response) { 1083 dev_err(&port->dev, "%s - Error %d submitting " 1084 "interrupt urb\n", __func__, response); 1085 } 1086 1087 } 1088 1089 } 1090 1091 /* see if we've set up our endpoint info yet * 1092 * (can't set it up in mos7840_startup as the * 1093 * structures were not set up at that time.) */ 1094 1095 dbg("port number is %d", port->number); 1096 dbg("serial number is %d", port->serial->minor); 1097 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); 1098 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); 1099 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); 1100 dbg("port's number in the device is %d", mos7840_port->port_num); 1101 mos7840_port->read_urb = port->read_urb; 1102 1103 /* set up our bulk in urb */ 1104 1105 usb_fill_bulk_urb(mos7840_port->read_urb, 1106 serial->dev, 1107 usb_rcvbulkpipe(serial->dev, 1108 port->bulk_in_endpointAddress), 1109 port->bulk_in_buffer, 1110 mos7840_port->read_urb->transfer_buffer_length, 1111 mos7840_bulk_in_callback, mos7840_port); 1112 1113 dbg("mos7840_open: bulkin endpoint is %d", 1114 port->bulk_in_endpointAddress); 1115 mos7840_port->read_urb_busy = true; 1116 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1117 if (response) { 1118 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1119 __func__, response); 1120 mos7840_port->read_urb_busy = false; 1121 } 1122 1123 /* initialize our wait queues */ 1124 init_waitqueue_head(&mos7840_port->wait_chase); 1125 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1126 1127 /* initialize our icount structure */ 1128 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1129 1130 /* initialize our port settings */ 1131 /* Must set to enable ints! */ 1132 mos7840_port->shadowMCR = MCR_MASTER_IE; 1133 /* send a open port command */ 1134 mos7840_port->open = 1; 1135 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1136 mos7840_port->icount.tx = 0; 1137 mos7840_port->icount.rx = 0; 1138 1139 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", 1140 serial, mos7840_port, port); 1141 1142 dbg ("%s leave", __func__); 1143 1144 return 0; 1145 1146 } 1147 1148 /***************************************************************************** 1149 * mos7840_chars_in_buffer 1150 * this function is called by the tty driver when it wants to know how many 1151 * bytes of data we currently have outstanding in the port (data that has 1152 * been written, but hasn't made it out the port yet) 1153 * If successful, we return the number of bytes left to be written in the 1154 * system, 1155 * Otherwise we return zero. 1156 *****************************************************************************/ 1157 1158 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1159 { 1160 struct usb_serial_port *port = tty->driver_data; 1161 int i; 1162 int chars = 0; 1163 unsigned long flags; 1164 struct moschip_port *mos7840_port; 1165 1166 dbg("%s", " mos7840_chars_in_buffer:entering ..........."); 1167 1168 if (mos7840_port_paranoia_check(port, __func__)) { 1169 dbg("%s", "Invalid port"); 1170 return 0; 1171 } 1172 1173 mos7840_port = mos7840_get_port_private(port); 1174 if (mos7840_port == NULL) { 1175 dbg("%s", "mos7840_break:leaving ..........."); 1176 return 0; 1177 } 1178 1179 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1180 for (i = 0; i < NUM_URBS; ++i) 1181 if (mos7840_port->busy[i]) 1182 chars += URB_TRANSFER_BUFFER_SIZE; 1183 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1184 dbg("%s - returns %d", __func__, chars); 1185 return chars; 1186 1187 } 1188 1189 /***************************************************************************** 1190 * mos7840_close 1191 * this function is called by the tty driver when a port is closed 1192 *****************************************************************************/ 1193 1194 static void mos7840_close(struct usb_serial_port *port) 1195 { 1196 struct usb_serial *serial; 1197 struct moschip_port *mos7840_port; 1198 struct moschip_port *port0; 1199 int j; 1200 __u16 Data; 1201 1202 dbg("%s", "mos7840_close:entering..."); 1203 1204 if (mos7840_port_paranoia_check(port, __func__)) { 1205 dbg("%s", "Port Paranoia failed"); 1206 return; 1207 } 1208 1209 serial = mos7840_get_usb_serial(port, __func__); 1210 if (!serial) { 1211 dbg("%s", "Serial Paranoia failed"); 1212 return; 1213 } 1214 1215 mos7840_port = mos7840_get_port_private(port); 1216 port0 = mos7840_get_port_private(serial->port[0]); 1217 1218 if (mos7840_port == NULL || port0 == NULL) 1219 return; 1220 1221 for (j = 0; j < NUM_URBS; ++j) 1222 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1223 1224 /* Freeing Write URBs */ 1225 for (j = 0; j < NUM_URBS; ++j) { 1226 if (mos7840_port->write_urb_pool[j]) { 1227 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1228 kfree(mos7840_port->write_urb_pool[j]-> 1229 transfer_buffer); 1230 1231 usb_free_urb(mos7840_port->write_urb_pool[j]); 1232 } 1233 } 1234 1235 /* While closing port, shutdown all bulk read, write * 1236 * and interrupt read if they exists */ 1237 if (serial->dev) { 1238 if (mos7840_port->write_urb) { 1239 dbg("%s", "Shutdown bulk write"); 1240 usb_kill_urb(mos7840_port->write_urb); 1241 } 1242 if (mos7840_port->read_urb) { 1243 dbg("%s", "Shutdown bulk read"); 1244 usb_kill_urb(mos7840_port->read_urb); 1245 mos7840_port->read_urb_busy = false; 1246 } 1247 if ((&mos7840_port->control_urb)) { 1248 dbg("%s", "Shutdown control read"); 1249 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1250 } 1251 } 1252 /* if(mos7840_port->ctrl_buf != NULL) */ 1253 /* kfree(mos7840_port->ctrl_buf); */ 1254 port0->open_ports--; 1255 dbg("mos7840_num_open_ports in close%d:in port%d", 1256 port0->open_ports, port->number); 1257 if (port0->open_ports == 0) { 1258 if (serial->port[0]->interrupt_in_urb) { 1259 dbg("%s", "Shutdown interrupt_in_urb"); 1260 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1261 } 1262 } 1263 1264 if (mos7840_port->write_urb) { 1265 /* if this urb had a transfer buffer already (old tx) free it */ 1266 if (mos7840_port->write_urb->transfer_buffer != NULL) 1267 kfree(mos7840_port->write_urb->transfer_buffer); 1268 usb_free_urb(mos7840_port->write_urb); 1269 } 1270 1271 Data = 0x0; 1272 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1273 1274 Data = 0x00; 1275 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1276 1277 mos7840_port->open = 0; 1278 1279 dbg("%s", "Leaving ............"); 1280 } 1281 1282 /************************************************************************ 1283 * 1284 * mos7840_block_until_chase_response 1285 * 1286 * This function will block the close until one of the following: 1287 * 1. Response to our Chase comes from mos7840 1288 * 2. A timeout of 10 seconds without activity has expired 1289 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1290 * 1291 ************************************************************************/ 1292 1293 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1294 struct moschip_port *mos7840_port) 1295 { 1296 int timeout = 1 * HZ; 1297 int wait = 10; 1298 int count; 1299 1300 while (1) { 1301 count = mos7840_chars_in_buffer(tty); 1302 1303 /* Check for Buffer status */ 1304 if (count <= 0) 1305 return; 1306 1307 /* Block the thread for a while */ 1308 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1309 timeout); 1310 /* No activity.. count down section */ 1311 wait--; 1312 if (wait == 0) { 1313 dbg("%s - TIMEOUT", __func__); 1314 return; 1315 } else { 1316 /* Reset timeout value back to seconds */ 1317 wait = 10; 1318 } 1319 } 1320 1321 } 1322 1323 /***************************************************************************** 1324 * mos7840_break 1325 * this function sends a break to the port 1326 *****************************************************************************/ 1327 static void mos7840_break(struct tty_struct *tty, int break_state) 1328 { 1329 struct usb_serial_port *port = tty->driver_data; 1330 unsigned char data; 1331 struct usb_serial *serial; 1332 struct moschip_port *mos7840_port; 1333 1334 dbg("%s", "Entering ..........."); 1335 dbg("mos7840_break: Start"); 1336 1337 if (mos7840_port_paranoia_check(port, __func__)) { 1338 dbg("%s", "Port Paranoia failed"); 1339 return; 1340 } 1341 1342 serial = mos7840_get_usb_serial(port, __func__); 1343 if (!serial) { 1344 dbg("%s", "Serial Paranoia failed"); 1345 return; 1346 } 1347 1348 mos7840_port = mos7840_get_port_private(port); 1349 1350 if (mos7840_port == NULL) 1351 return; 1352 1353 if (serial->dev) 1354 /* flush and block until tx is empty */ 1355 mos7840_block_until_chase_response(tty, mos7840_port); 1356 1357 if (break_state == -1) 1358 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1359 else 1360 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1361 1362 /* FIXME: no locking on shadowLCR anywhere in driver */ 1363 mos7840_port->shadowLCR = data; 1364 dbg("mcs7840_break mos7840_port->shadowLCR is %x", 1365 mos7840_port->shadowLCR); 1366 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1367 mos7840_port->shadowLCR); 1368 } 1369 1370 /***************************************************************************** 1371 * mos7840_write_room 1372 * this function is called by the tty driver when it wants to know how many 1373 * bytes of data we can accept for a specific port. 1374 * If successful, we return the amount of room that we have for this port 1375 * Otherwise we return a negative error number. 1376 *****************************************************************************/ 1377 1378 static int mos7840_write_room(struct tty_struct *tty) 1379 { 1380 struct usb_serial_port *port = tty->driver_data; 1381 int i; 1382 int room = 0; 1383 unsigned long flags; 1384 struct moschip_port *mos7840_port; 1385 1386 dbg("%s", " mos7840_write_room:entering ..........."); 1387 1388 if (mos7840_port_paranoia_check(port, __func__)) { 1389 dbg("%s", "Invalid port"); 1390 dbg("%s", " mos7840_write_room:leaving ..........."); 1391 return -1; 1392 } 1393 1394 mos7840_port = mos7840_get_port_private(port); 1395 if (mos7840_port == NULL) { 1396 dbg("%s", "mos7840_break:leaving ..........."); 1397 return -1; 1398 } 1399 1400 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1401 for (i = 0; i < NUM_URBS; ++i) { 1402 if (!mos7840_port->busy[i]) 1403 room += URB_TRANSFER_BUFFER_SIZE; 1404 } 1405 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1406 1407 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1408 dbg("%s - returns %d", __func__, room); 1409 return room; 1410 1411 } 1412 1413 /***************************************************************************** 1414 * mos7840_write 1415 * this function is called by the tty driver when data should be written to 1416 * the port. 1417 * If successful, we return the number of bytes written, otherwise we 1418 * return a negative error number. 1419 *****************************************************************************/ 1420 1421 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1422 const unsigned char *data, int count) 1423 { 1424 int status; 1425 int i; 1426 int bytes_sent = 0; 1427 int transfer_size; 1428 unsigned long flags; 1429 1430 struct moschip_port *mos7840_port; 1431 struct usb_serial *serial; 1432 struct urb *urb; 1433 /* __u16 Data; */ 1434 const unsigned char *current_position = data; 1435 unsigned char *data1; 1436 dbg("%s", "entering ..........."); 1437 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1438 mos7840_port->shadowLCR); */ 1439 1440 #ifdef NOTMOS7840 1441 Data = 0x00; 1442 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1443 mos7840_port->shadowLCR = Data; 1444 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); 1445 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1446 mos7840_port->shadowLCR); 1447 1448 /* Data = 0x03; */ 1449 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1450 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1451 1452 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1453 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1454 1455 /* Data = 0x0c; */ 1456 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1457 Data = 0x00; 1458 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1459 dbg("mos7840_write:DLL value is %x", Data); 1460 1461 Data = 0x0; 1462 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1463 dbg("mos7840_write:DLM value is %x", Data); 1464 1465 Data = Data & ~SERIAL_LCR_DLAB; 1466 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1467 mos7840_port->shadowLCR); 1468 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1469 #endif 1470 1471 if (mos7840_port_paranoia_check(port, __func__)) { 1472 dbg("%s", "Port Paranoia failed"); 1473 return -1; 1474 } 1475 1476 serial = port->serial; 1477 if (mos7840_serial_paranoia_check(serial, __func__)) { 1478 dbg("%s", "Serial Paranoia failed"); 1479 return -1; 1480 } 1481 1482 mos7840_port = mos7840_get_port_private(port); 1483 if (mos7840_port == NULL) { 1484 dbg("%s", "mos7840_port is NULL"); 1485 return -1; 1486 } 1487 1488 /* try to find a free urb in the list */ 1489 urb = NULL; 1490 1491 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1492 for (i = 0; i < NUM_URBS; ++i) { 1493 if (!mos7840_port->busy[i]) { 1494 mos7840_port->busy[i] = 1; 1495 urb = mos7840_port->write_urb_pool[i]; 1496 dbg("URB:%d", i); 1497 break; 1498 } 1499 } 1500 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1501 1502 if (urb == NULL) { 1503 dbg("%s - no more free urbs", __func__); 1504 goto exit; 1505 } 1506 1507 if (urb->transfer_buffer == NULL) { 1508 urb->transfer_buffer = 1509 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1510 1511 if (urb->transfer_buffer == NULL) { 1512 dev_err(&port->dev, "%s no more kernel memory...\n", 1513 __func__); 1514 goto exit; 1515 } 1516 } 1517 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1518 1519 memcpy(urb->transfer_buffer, current_position, transfer_size); 1520 1521 /* fill urb with data and submit */ 1522 usb_fill_bulk_urb(urb, 1523 serial->dev, 1524 usb_sndbulkpipe(serial->dev, 1525 port->bulk_out_endpointAddress), 1526 urb->transfer_buffer, 1527 transfer_size, 1528 mos7840_bulk_out_data_callback, mos7840_port); 1529 1530 data1 = urb->transfer_buffer; 1531 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); 1532 1533 /* send it down the pipe */ 1534 status = usb_submit_urb(urb, GFP_ATOMIC); 1535 1536 if (status) { 1537 mos7840_port->busy[i] = 0; 1538 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 1539 "with status = %d\n", __func__, status); 1540 bytes_sent = status; 1541 goto exit; 1542 } 1543 bytes_sent = transfer_size; 1544 mos7840_port->icount.tx += transfer_size; 1545 smp_wmb(); 1546 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); 1547 exit: 1548 return bytes_sent; 1549 1550 } 1551 1552 /***************************************************************************** 1553 * mos7840_throttle 1554 * this function is called by the tty driver when it wants to stop the data 1555 * being read from the port. 1556 *****************************************************************************/ 1557 1558 static void mos7840_throttle(struct tty_struct *tty) 1559 { 1560 struct usb_serial_port *port = tty->driver_data; 1561 struct moschip_port *mos7840_port; 1562 int status; 1563 1564 if (mos7840_port_paranoia_check(port, __func__)) { 1565 dbg("%s", "Invalid port"); 1566 return; 1567 } 1568 1569 dbg("- port %d", port->number); 1570 1571 mos7840_port = mos7840_get_port_private(port); 1572 1573 if (mos7840_port == NULL) 1574 return; 1575 1576 if (!mos7840_port->open) { 1577 dbg("%s", "port not opened"); 1578 return; 1579 } 1580 1581 dbg("%s", "Entering .........."); 1582 1583 /* if we are implementing XON/XOFF, send the stop character */ 1584 if (I_IXOFF(tty)) { 1585 unsigned char stop_char = STOP_CHAR(tty); 1586 status = mos7840_write(tty, port, &stop_char, 1); 1587 if (status <= 0) 1588 return; 1589 } 1590 /* if we are implementing RTS/CTS, toggle that line */ 1591 if (tty->termios->c_cflag & CRTSCTS) { 1592 mos7840_port->shadowMCR &= ~MCR_RTS; 1593 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1594 mos7840_port->shadowMCR); 1595 if (status < 0) 1596 return; 1597 } 1598 } 1599 1600 /***************************************************************************** 1601 * mos7840_unthrottle 1602 * this function is called by the tty driver when it wants to resume 1603 * the data being read from the port (called after mos7840_throttle is 1604 * called) 1605 *****************************************************************************/ 1606 static void mos7840_unthrottle(struct tty_struct *tty) 1607 { 1608 struct usb_serial_port *port = tty->driver_data; 1609 int status; 1610 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1611 1612 if (mos7840_port_paranoia_check(port, __func__)) { 1613 dbg("%s", "Invalid port"); 1614 return; 1615 } 1616 1617 if (mos7840_port == NULL) 1618 return; 1619 1620 if (!mos7840_port->open) { 1621 dbg("%s - port not opened", __func__); 1622 return; 1623 } 1624 1625 dbg("%s", "Entering .........."); 1626 1627 /* if we are implementing XON/XOFF, send the start character */ 1628 if (I_IXOFF(tty)) { 1629 unsigned char start_char = START_CHAR(tty); 1630 status = mos7840_write(tty, port, &start_char, 1); 1631 if (status <= 0) 1632 return; 1633 } 1634 1635 /* if we are implementing RTS/CTS, toggle that line */ 1636 if (tty->termios->c_cflag & CRTSCTS) { 1637 mos7840_port->shadowMCR |= MCR_RTS; 1638 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1639 mos7840_port->shadowMCR); 1640 if (status < 0) 1641 return; 1642 } 1643 } 1644 1645 static int mos7840_tiocmget(struct tty_struct *tty) 1646 { 1647 struct usb_serial_port *port = tty->driver_data; 1648 struct moschip_port *mos7840_port; 1649 unsigned int result; 1650 __u16 msr; 1651 __u16 mcr; 1652 int status; 1653 mos7840_port = mos7840_get_port_private(port); 1654 1655 dbg("%s - port %d", __func__, port->number); 1656 1657 if (mos7840_port == NULL) 1658 return -ENODEV; 1659 1660 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1661 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1662 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1663 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1664 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1665 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1666 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1667 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1668 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1669 1670 dbg("%s - 0x%04X", __func__, result); 1671 1672 return result; 1673 } 1674 1675 static int mos7840_tiocmset(struct tty_struct *tty, 1676 unsigned int set, unsigned int clear) 1677 { 1678 struct usb_serial_port *port = tty->driver_data; 1679 struct moschip_port *mos7840_port; 1680 unsigned int mcr; 1681 int status; 1682 1683 dbg("%s - port %d", __func__, port->number); 1684 1685 mos7840_port = mos7840_get_port_private(port); 1686 1687 if (mos7840_port == NULL) 1688 return -ENODEV; 1689 1690 /* FIXME: What locks the port registers ? */ 1691 mcr = mos7840_port->shadowMCR; 1692 if (clear & TIOCM_RTS) 1693 mcr &= ~MCR_RTS; 1694 if (clear & TIOCM_DTR) 1695 mcr &= ~MCR_DTR; 1696 if (clear & TIOCM_LOOP) 1697 mcr &= ~MCR_LOOPBACK; 1698 1699 if (set & TIOCM_RTS) 1700 mcr |= MCR_RTS; 1701 if (set & TIOCM_DTR) 1702 mcr |= MCR_DTR; 1703 if (set & TIOCM_LOOP) 1704 mcr |= MCR_LOOPBACK; 1705 1706 mos7840_port->shadowMCR = mcr; 1707 1708 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1709 if (status < 0) { 1710 dbg("setting MODEM_CONTROL_REGISTER Failed"); 1711 return status; 1712 } 1713 1714 return 0; 1715 } 1716 1717 /***************************************************************************** 1718 * mos7840_calc_baud_rate_divisor 1719 * this function calculates the proper baud rate divisor for the specified 1720 * baud rate. 1721 *****************************************************************************/ 1722 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1723 __u16 *clk_sel_val) 1724 { 1725 1726 dbg("%s - %d", __func__, baudRate); 1727 1728 if (baudRate <= 115200) { 1729 *divisor = 115200 / baudRate; 1730 *clk_sel_val = 0x0; 1731 } 1732 if ((baudRate > 115200) && (baudRate <= 230400)) { 1733 *divisor = 230400 / baudRate; 1734 *clk_sel_val = 0x10; 1735 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1736 *divisor = 403200 / baudRate; 1737 *clk_sel_val = 0x20; 1738 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1739 *divisor = 460800 / baudRate; 1740 *clk_sel_val = 0x30; 1741 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1742 *divisor = 806400 / baudRate; 1743 *clk_sel_val = 0x40; 1744 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1745 *divisor = 921600 / baudRate; 1746 *clk_sel_val = 0x50; 1747 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1748 *divisor = 1572864 / baudRate; 1749 *clk_sel_val = 0x60; 1750 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1751 *divisor = 3145728 / baudRate; 1752 *clk_sel_val = 0x70; 1753 } 1754 return 0; 1755 1756 #ifdef NOTMCS7840 1757 1758 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1759 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1760 *divisor = mos7840_divisor_table[i].Divisor; 1761 return 0; 1762 } 1763 } 1764 1765 /* After trying for all the standard baud rates * 1766 * Try calculating the divisor for this baud rate */ 1767 1768 if (baudrate > 75 && baudrate < 230400) { 1769 /* get the divisor */ 1770 custom = (__u16) (230400L / baudrate); 1771 1772 /* Check for round off */ 1773 round1 = (__u16) (2304000L / baudrate); 1774 round = (__u16) (round1 - (custom * 10)); 1775 if (round > 4) 1776 custom++; 1777 *divisor = custom; 1778 1779 dbg(" Baud %d = %d", baudrate, custom); 1780 return 0; 1781 } 1782 1783 dbg("%s", " Baud calculation Failed..."); 1784 return -1; 1785 #endif 1786 } 1787 1788 /***************************************************************************** 1789 * mos7840_send_cmd_write_baud_rate 1790 * this function sends the proper command to change the baud rate of the 1791 * specified port. 1792 *****************************************************************************/ 1793 1794 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1795 int baudRate) 1796 { 1797 int divisor = 0; 1798 int status; 1799 __u16 Data; 1800 unsigned char number; 1801 __u16 clk_sel_val; 1802 struct usb_serial_port *port; 1803 1804 if (mos7840_port == NULL) 1805 return -1; 1806 1807 port = (struct usb_serial_port *)mos7840_port->port; 1808 if (mos7840_port_paranoia_check(port, __func__)) { 1809 dbg("%s", "Invalid port"); 1810 return -1; 1811 } 1812 1813 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1814 dbg("%s", "Invalid Serial"); 1815 return -1; 1816 } 1817 1818 dbg("%s", "Entering .........."); 1819 1820 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1821 1822 dbg("%s - port = %d, baud = %d", __func__, 1823 mos7840_port->port->number, baudRate); 1824 /* reset clk_uart_sel in spregOffset */ 1825 if (baudRate > 115200) { 1826 #ifdef HW_flow_control 1827 /* NOTE: need to see the pther register to modify */ 1828 /* setting h/w flow control bit to 1 */ 1829 Data = 0x2b; 1830 mos7840_port->shadowMCR = Data; 1831 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1832 Data); 1833 if (status < 0) { 1834 dbg("Writing spreg failed in set_serial_baud"); 1835 return -1; 1836 } 1837 #endif 1838 1839 } else { 1840 #ifdef HW_flow_control 1841 / *setting h/w flow control bit to 0 */ 1842 Data = 0xb; 1843 mos7840_port->shadowMCR = Data; 1844 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1845 Data); 1846 if (status < 0) { 1847 dbg("Writing spreg failed in set_serial_baud"); 1848 return -1; 1849 } 1850 #endif 1851 1852 } 1853 1854 if (1) { /* baudRate <= 115200) */ 1855 clk_sel_val = 0x0; 1856 Data = 0x0; 1857 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1858 &clk_sel_val); 1859 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1860 &Data); 1861 if (status < 0) { 1862 dbg("reading spreg failed in set_serial_baud"); 1863 return -1; 1864 } 1865 Data = (Data & 0x8f) | clk_sel_val; 1866 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1867 Data); 1868 if (status < 0) { 1869 dbg("Writing spreg failed in set_serial_baud"); 1870 return -1; 1871 } 1872 /* Calculate the Divisor */ 1873 1874 if (status) { 1875 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1876 return status; 1877 } 1878 /* Enable access to divisor latch */ 1879 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1880 mos7840_port->shadowLCR = Data; 1881 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1882 1883 /* Write the divisor */ 1884 Data = (unsigned char)(divisor & 0xff); 1885 dbg("set_serial_baud Value to write DLL is %x", Data); 1886 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1887 1888 Data = (unsigned char)((divisor & 0xff00) >> 8); 1889 dbg("set_serial_baud Value to write DLM is %x", Data); 1890 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1891 1892 /* Disable access to divisor latch */ 1893 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1894 mos7840_port->shadowLCR = Data; 1895 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1896 1897 } 1898 return status; 1899 } 1900 1901 /***************************************************************************** 1902 * mos7840_change_port_settings 1903 * This routine is called to set the UART on the device to match 1904 * the specified new settings. 1905 *****************************************************************************/ 1906 1907 static void mos7840_change_port_settings(struct tty_struct *tty, 1908 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1909 { 1910 int baud; 1911 unsigned cflag; 1912 unsigned iflag; 1913 __u8 lData; 1914 __u8 lParity; 1915 __u8 lStop; 1916 int status; 1917 __u16 Data; 1918 struct usb_serial_port *port; 1919 struct usb_serial *serial; 1920 1921 if (mos7840_port == NULL) 1922 return; 1923 1924 port = (struct usb_serial_port *)mos7840_port->port; 1925 1926 if (mos7840_port_paranoia_check(port, __func__)) { 1927 dbg("%s", "Invalid port"); 1928 return; 1929 } 1930 1931 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1932 dbg("%s", "Invalid Serial"); 1933 return; 1934 } 1935 1936 serial = port->serial; 1937 1938 dbg("%s - port %d", __func__, mos7840_port->port->number); 1939 1940 if (!mos7840_port->open) { 1941 dbg("%s - port not opened", __func__); 1942 return; 1943 } 1944 1945 dbg("%s", "Entering .........."); 1946 1947 lData = LCR_BITS_8; 1948 lStop = LCR_STOP_1; 1949 lParity = LCR_PAR_NONE; 1950 1951 cflag = tty->termios->c_cflag; 1952 iflag = tty->termios->c_iflag; 1953 1954 /* Change the number of bits */ 1955 if (cflag & CSIZE) { 1956 switch (cflag & CSIZE) { 1957 case CS5: 1958 lData = LCR_BITS_5; 1959 break; 1960 1961 case CS6: 1962 lData = LCR_BITS_6; 1963 break; 1964 1965 case CS7: 1966 lData = LCR_BITS_7; 1967 break; 1968 default: 1969 case CS8: 1970 lData = LCR_BITS_8; 1971 break; 1972 } 1973 } 1974 /* Change the Parity bit */ 1975 if (cflag & PARENB) { 1976 if (cflag & PARODD) { 1977 lParity = LCR_PAR_ODD; 1978 dbg("%s - parity = odd", __func__); 1979 } else { 1980 lParity = LCR_PAR_EVEN; 1981 dbg("%s - parity = even", __func__); 1982 } 1983 1984 } else { 1985 dbg("%s - parity = none", __func__); 1986 } 1987 1988 if (cflag & CMSPAR) 1989 lParity = lParity | 0x20; 1990 1991 /* Change the Stop bit */ 1992 if (cflag & CSTOPB) { 1993 lStop = LCR_STOP_2; 1994 dbg("%s - stop bits = 2", __func__); 1995 } else { 1996 lStop = LCR_STOP_1; 1997 dbg("%s - stop bits = 1", __func__); 1998 } 1999 2000 /* Update the LCR with the correct value */ 2001 mos7840_port->shadowLCR &= 2002 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2003 mos7840_port->shadowLCR |= (lData | lParity | lStop); 2004 2005 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", 2006 mos7840_port->shadowLCR); 2007 /* Disable Interrupts */ 2008 Data = 0x00; 2009 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2010 2011 Data = 0x00; 2012 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2013 2014 Data = 0xcf; 2015 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2016 2017 /* Send the updated LCR value to the mos7840 */ 2018 Data = mos7840_port->shadowLCR; 2019 2020 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 2021 2022 Data = 0x00b; 2023 mos7840_port->shadowMCR = Data; 2024 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2025 Data = 0x00b; 2026 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2027 2028 /* set up the MCR register and send it to the mos7840 */ 2029 2030 mos7840_port->shadowMCR = MCR_MASTER_IE; 2031 if (cflag & CBAUD) 2032 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2033 2034 if (cflag & CRTSCTS) 2035 mos7840_port->shadowMCR |= (MCR_XON_ANY); 2036 else 2037 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2038 2039 Data = mos7840_port->shadowMCR; 2040 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2041 2042 /* Determine divisor based on baud rate */ 2043 baud = tty_get_baud_rate(tty); 2044 2045 if (!baud) { 2046 /* pick a default, any default... */ 2047 dbg("%s", "Picked default baud..."); 2048 baud = 9600; 2049 } 2050 2051 dbg("%s - baud rate = %d", __func__, baud); 2052 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2053 2054 /* Enable Interrupts */ 2055 Data = 0x0c; 2056 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2057 2058 if (mos7840_port->read_urb_busy == false) { 2059 mos7840_port->read_urb_busy = true; 2060 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2061 if (status) { 2062 dbg("usb_submit_urb(read bulk) failed, status = %d", 2063 status); 2064 mos7840_port->read_urb_busy = false; 2065 } 2066 } 2067 wake_up(&mos7840_port->delta_msr_wait); 2068 mos7840_port->delta_msr_cond = 1; 2069 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", 2070 mos7840_port->shadowLCR); 2071 } 2072 2073 /***************************************************************************** 2074 * mos7840_set_termios 2075 * this function is called by the tty driver when it wants to change 2076 * the termios structure 2077 *****************************************************************************/ 2078 2079 static void mos7840_set_termios(struct tty_struct *tty, 2080 struct usb_serial_port *port, 2081 struct ktermios *old_termios) 2082 { 2083 int status; 2084 unsigned int cflag; 2085 struct usb_serial *serial; 2086 struct moschip_port *mos7840_port; 2087 dbg("mos7840_set_termios: START"); 2088 if (mos7840_port_paranoia_check(port, __func__)) { 2089 dbg("%s", "Invalid port"); 2090 return; 2091 } 2092 2093 serial = port->serial; 2094 2095 if (mos7840_serial_paranoia_check(serial, __func__)) { 2096 dbg("%s", "Invalid Serial"); 2097 return; 2098 } 2099 2100 mos7840_port = mos7840_get_port_private(port); 2101 2102 if (mos7840_port == NULL) 2103 return; 2104 2105 if (!mos7840_port->open) { 2106 dbg("%s - port not opened", __func__); 2107 return; 2108 } 2109 2110 dbg("%s", "setting termios - "); 2111 2112 cflag = tty->termios->c_cflag; 2113 2114 dbg("%s - clfag %08x iflag %08x", __func__, 2115 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2116 dbg("%s - old clfag %08x old iflag %08x", __func__, 2117 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2118 dbg("%s - port %d", __func__, port->number); 2119 2120 /* change the port settings to the new ones specified */ 2121 2122 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2123 2124 if (!mos7840_port->read_urb) { 2125 dbg("%s", "URB KILLED !!!!!"); 2126 return; 2127 } 2128 2129 if (mos7840_port->read_urb_busy == false) { 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 } 2139 2140 /***************************************************************************** 2141 * mos7840_get_lsr_info - get line status register info 2142 * 2143 * Purpose: Let user call ioctl() to get info when the UART physically 2144 * is emptied. On bus types like RS485, the transmitter must 2145 * release the bus after transmitting. This must be done when 2146 * the transmit shift register is empty, not be done when the 2147 * transmit holding register is empty. This functionality 2148 * allows an RS485 driver to be written in user space. 2149 *****************************************************************************/ 2150 2151 static int mos7840_get_lsr_info(struct tty_struct *tty, 2152 unsigned int __user *value) 2153 { 2154 int count; 2155 unsigned int result = 0; 2156 2157 count = mos7840_chars_in_buffer(tty); 2158 if (count == 0) { 2159 dbg("%s -- Empty", __func__); 2160 result = TIOCSER_TEMT; 2161 } 2162 2163 if (copy_to_user(value, &result, sizeof(int))) 2164 return -EFAULT; 2165 return 0; 2166 } 2167 2168 /***************************************************************************** 2169 * mos7840_get_serial_info 2170 * function to get information about serial port 2171 *****************************************************************************/ 2172 2173 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2174 struct serial_struct __user *retinfo) 2175 { 2176 struct serial_struct tmp; 2177 2178 if (mos7840_port == NULL) 2179 return -1; 2180 2181 if (!retinfo) 2182 return -EFAULT; 2183 2184 memset(&tmp, 0, sizeof(tmp)); 2185 2186 tmp.type = PORT_16550A; 2187 tmp.line = mos7840_port->port->serial->minor; 2188 tmp.port = mos7840_port->port->number; 2189 tmp.irq = 0; 2190 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2191 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2192 tmp.baud_base = 9600; 2193 tmp.close_delay = 5 * HZ; 2194 tmp.closing_wait = 30 * HZ; 2195 2196 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2197 return -EFAULT; 2198 return 0; 2199 } 2200 2201 static int mos7840_get_icount(struct tty_struct *tty, 2202 struct serial_icounter_struct *icount) 2203 { 2204 struct usb_serial_port *port = tty->driver_data; 2205 struct moschip_port *mos7840_port; 2206 struct async_icount cnow; 2207 2208 mos7840_port = mos7840_get_port_private(port); 2209 cnow = mos7840_port->icount; 2210 2211 smp_rmb(); 2212 icount->cts = cnow.cts; 2213 icount->dsr = cnow.dsr; 2214 icount->rng = cnow.rng; 2215 icount->dcd = cnow.dcd; 2216 icount->rx = cnow.rx; 2217 icount->tx = cnow.tx; 2218 icount->frame = cnow.frame; 2219 icount->overrun = cnow.overrun; 2220 icount->parity = cnow.parity; 2221 icount->brk = cnow.brk; 2222 icount->buf_overrun = cnow.buf_overrun; 2223 2224 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2225 port->number, icount->rx, icount->tx); 2226 return 0; 2227 } 2228 2229 /***************************************************************************** 2230 * SerialIoctl 2231 * this function handles any ioctl calls to the driver 2232 *****************************************************************************/ 2233 2234 static int mos7840_ioctl(struct tty_struct *tty, 2235 unsigned int cmd, unsigned long arg) 2236 { 2237 struct usb_serial_port *port = tty->driver_data; 2238 void __user *argp = (void __user *)arg; 2239 struct moschip_port *mos7840_port; 2240 2241 struct async_icount cnow; 2242 struct async_icount cprev; 2243 2244 if (mos7840_port_paranoia_check(port, __func__)) { 2245 dbg("%s", "Invalid port"); 2246 return -1; 2247 } 2248 2249 mos7840_port = mos7840_get_port_private(port); 2250 2251 if (mos7840_port == NULL) 2252 return -1; 2253 2254 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2255 2256 switch (cmd) { 2257 /* return number of bytes available */ 2258 2259 case TIOCSERGETLSR: 2260 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2261 return mos7840_get_lsr_info(tty, argp); 2262 2263 case TIOCGSERIAL: 2264 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2265 return mos7840_get_serial_info(mos7840_port, argp); 2266 2267 case TIOCSSERIAL: 2268 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2269 break; 2270 2271 case TIOCMIWAIT: 2272 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2273 cprev = mos7840_port->icount; 2274 while (1) { 2275 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2276 mos7840_port->delta_msr_cond = 0; 2277 wait_event_interruptible(mos7840_port->delta_msr_wait, 2278 (mos7840_port-> 2279 delta_msr_cond == 1)); 2280 2281 /* see if a signal did it */ 2282 if (signal_pending(current)) 2283 return -ERESTARTSYS; 2284 cnow = mos7840_port->icount; 2285 smp_rmb(); 2286 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2287 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2288 return -EIO; /* no change => error */ 2289 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2290 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2291 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2292 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2293 return 0; 2294 } 2295 cprev = cnow; 2296 } 2297 /* NOTREACHED */ 2298 break; 2299 2300 default: 2301 break; 2302 } 2303 return -ENOIOCTLCMD; 2304 } 2305 2306 static int mos7840_calc_num_ports(struct usb_serial *serial) 2307 { 2308 int mos7840_num_ports = 0; 2309 2310 dbg("numberofendpoints: cur %d, alt %d", 2311 (int)serial->interface->cur_altsetting->desc.bNumEndpoints, 2312 (int)serial->interface->altsetting->desc.bNumEndpoints); 2313 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2314 mos7840_num_ports = serial->num_ports = 2; 2315 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2316 serial->num_bulk_in = 4; 2317 serial->num_bulk_out = 4; 2318 mos7840_num_ports = serial->num_ports = 4; 2319 } 2320 dbg ("mos7840_num_ports = %d", mos7840_num_ports); 2321 return mos7840_num_ports; 2322 } 2323 2324 /**************************************************************************** 2325 * mos7840_startup 2326 ****************************************************************************/ 2327 2328 static int mos7840_startup(struct usb_serial *serial) 2329 { 2330 struct moschip_port *mos7840_port; 2331 struct usb_device *dev; 2332 int i, status; 2333 2334 __u16 Data; 2335 dbg("%s", "mos7840_startup :Entering.........."); 2336 2337 if (!serial) { 2338 dbg("%s", "Invalid Handler"); 2339 return -1; 2340 } 2341 2342 dev = serial->dev; 2343 2344 dbg("%s", "Entering..."); 2345 dbg ("mos7840_startup: serial = %p", serial); 2346 2347 /* we set up the pointers to the endpoints in the mos7840_open * 2348 * function, as the structures aren't created yet. */ 2349 2350 /* set up port private structures */ 2351 for (i = 0; i < serial->num_ports; ++i) { 2352 dbg ("mos7840_startup: configuring port %d............", i); 2353 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2354 if (mos7840_port == NULL) { 2355 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2356 status = -ENOMEM; 2357 i--; /* don't follow NULL pointer cleaning up */ 2358 goto error; 2359 } 2360 2361 /* Initialize all port interrupt end point to port 0 int 2362 * endpoint. Our device has only one interrupt end point 2363 * common to all port */ 2364 2365 mos7840_port->port = serial->port[i]; 2366 mos7840_set_port_private(serial->port[i], mos7840_port); 2367 spin_lock_init(&mos7840_port->pool_lock); 2368 2369 /* minor is not initialised until later by 2370 * usb-serial.c:get_free_serial() and cannot therefore be used 2371 * to index device instances */ 2372 mos7840_port->port_num = i + 1; 2373 dbg ("serial->port[i]->number = %d", serial->port[i]->number); 2374 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); 2375 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); 2376 dbg ("serial->minor = %d", serial->minor); 2377 2378 if (mos7840_port->port_num == 1) { 2379 mos7840_port->SpRegOffset = 0x0; 2380 mos7840_port->ControlRegOffset = 0x1; 2381 mos7840_port->DcrRegOffset = 0x4; 2382 } else if ((mos7840_port->port_num == 2) 2383 && (serial->num_ports == 4)) { 2384 mos7840_port->SpRegOffset = 0x8; 2385 mos7840_port->ControlRegOffset = 0x9; 2386 mos7840_port->DcrRegOffset = 0x16; 2387 } else if ((mos7840_port->port_num == 2) 2388 && (serial->num_ports == 2)) { 2389 mos7840_port->SpRegOffset = 0xa; 2390 mos7840_port->ControlRegOffset = 0xb; 2391 mos7840_port->DcrRegOffset = 0x19; 2392 } else if ((mos7840_port->port_num == 3) 2393 && (serial->num_ports == 4)) { 2394 mos7840_port->SpRegOffset = 0xa; 2395 mos7840_port->ControlRegOffset = 0xb; 2396 mos7840_port->DcrRegOffset = 0x19; 2397 } else if ((mos7840_port->port_num == 4) 2398 && (serial->num_ports == 4)) { 2399 mos7840_port->SpRegOffset = 0xc; 2400 mos7840_port->ControlRegOffset = 0xd; 2401 mos7840_port->DcrRegOffset = 0x1c; 2402 } 2403 mos7840_dump_serial_port(mos7840_port); 2404 mos7840_set_port_private(serial->port[i], mos7840_port); 2405 2406 /* enable rx_disable bit in control register */ 2407 status = mos7840_get_reg_sync(serial->port[i], 2408 mos7840_port->ControlRegOffset, &Data); 2409 if (status < 0) { 2410 dbg("Reading ControlReg failed status-0x%x", status); 2411 break; 2412 } else 2413 dbg("ControlReg Reading success val is %x, status%d", 2414 Data, status); 2415 Data |= 0x08; /* setting driver done bit */ 2416 Data |= 0x04; /* sp1_bit to have cts change reflect in 2417 modem status reg */ 2418 2419 /* Data |= 0x20; //rx_disable bit */ 2420 status = mos7840_set_reg_sync(serial->port[i], 2421 mos7840_port->ControlRegOffset, Data); 2422 if (status < 0) { 2423 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); 2424 break; 2425 } else 2426 dbg("ControlReg Writing success(rx_disable) status%d", 2427 status); 2428 2429 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2430 and 0x24 in DCR3 */ 2431 Data = 0x01; 2432 status = mos7840_set_reg_sync(serial->port[i], 2433 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2434 if (status < 0) { 2435 dbg("Writing DCR0 failed status-0x%x", status); 2436 break; 2437 } else 2438 dbg("DCR0 Writing success status%d", status); 2439 2440 Data = 0x05; 2441 status = mos7840_set_reg_sync(serial->port[i], 2442 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2443 if (status < 0) { 2444 dbg("Writing DCR1 failed status-0x%x", status); 2445 break; 2446 } else 2447 dbg("DCR1 Writing success status%d", status); 2448 2449 Data = 0x24; 2450 status = mos7840_set_reg_sync(serial->port[i], 2451 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2452 if (status < 0) { 2453 dbg("Writing DCR2 failed status-0x%x", status); 2454 break; 2455 } else 2456 dbg("DCR2 Writing success status%d", status); 2457 2458 /* write values in clkstart0x0 and clkmulti 0x20 */ 2459 Data = 0x0; 2460 status = mos7840_set_reg_sync(serial->port[i], 2461 CLK_START_VALUE_REGISTER, Data); 2462 if (status < 0) { 2463 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); 2464 break; 2465 } else 2466 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); 2467 2468 Data = 0x20; 2469 status = mos7840_set_reg_sync(serial->port[i], 2470 CLK_MULTI_REGISTER, Data); 2471 if (status < 0) { 2472 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", 2473 status); 2474 goto error; 2475 } else 2476 dbg("CLK_MULTI_REGISTER Writing success status%d", 2477 status); 2478 2479 /* write value 0x0 to scratchpad register */ 2480 Data = 0x00; 2481 status = mos7840_set_uart_reg(serial->port[i], 2482 SCRATCH_PAD_REGISTER, Data); 2483 if (status < 0) { 2484 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", 2485 status); 2486 break; 2487 } else 2488 dbg("SCRATCH_PAD_REGISTER Writing success status%d", 2489 status); 2490 2491 /* Zero Length flag register */ 2492 if ((mos7840_port->port_num != 1) 2493 && (serial->num_ports == 2)) { 2494 2495 Data = 0xff; 2496 status = mos7840_set_reg_sync(serial->port[i], 2497 (__u16) (ZLP_REG1 + 2498 ((__u16)mos7840_port->port_num)), Data); 2499 dbg("ZLIP offset %x", 2500 (__u16) (ZLP_REG1 + 2501 ((__u16) mos7840_port->port_num))); 2502 if (status < 0) { 2503 dbg("Writing ZLP_REG%d failed status-0x%x", 2504 i + 2, status); 2505 break; 2506 } else 2507 dbg("ZLP_REG%d Writing success status%d", 2508 i + 2, status); 2509 } else { 2510 Data = 0xff; 2511 status = mos7840_set_reg_sync(serial->port[i], 2512 (__u16) (ZLP_REG1 + 2513 ((__u16)mos7840_port->port_num) - 0x1), Data); 2514 dbg("ZLIP offset %x", 2515 (__u16) (ZLP_REG1 + 2516 ((__u16) mos7840_port->port_num) - 0x1)); 2517 if (status < 0) { 2518 dbg("Writing ZLP_REG%d failed status-0x%x", 2519 i + 1, status); 2520 break; 2521 } else 2522 dbg("ZLP_REG%d Writing success status%d", 2523 i + 1, status); 2524 2525 } 2526 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2527 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2528 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2529 GFP_KERNEL); 2530 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2531 !mos7840_port->dr) { 2532 status = -ENOMEM; 2533 goto error; 2534 } 2535 } 2536 dbg ("mos7840_startup: all ports configured..........."); 2537 2538 /* Zero Length flag enable */ 2539 Data = 0x0f; 2540 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2541 if (status < 0) { 2542 dbg("Writing ZLP_REG5 failed status-0x%x", status); 2543 goto error; 2544 } else 2545 dbg("ZLP_REG5 Writing success status%d", status); 2546 2547 /* setting configuration feature to one */ 2548 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2549 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2550 return 0; 2551 error: 2552 for (/* nothing */; i >= 0; i--) { 2553 mos7840_port = mos7840_get_port_private(serial->port[i]); 2554 2555 kfree(mos7840_port->dr); 2556 kfree(mos7840_port->ctrl_buf); 2557 usb_free_urb(mos7840_port->control_urb); 2558 kfree(mos7840_port); 2559 serial->port[i] = NULL; 2560 } 2561 return status; 2562 } 2563 2564 /**************************************************************************** 2565 * mos7840_disconnect 2566 * This function is called whenever the device is removed from the usb bus. 2567 ****************************************************************************/ 2568 2569 static void mos7840_disconnect(struct usb_serial *serial) 2570 { 2571 int i; 2572 unsigned long flags; 2573 struct moschip_port *mos7840_port; 2574 dbg("%s", " disconnect :entering.........."); 2575 2576 if (!serial) { 2577 dbg("%s", "Invalid Handler"); 2578 return; 2579 } 2580 2581 /* check for the ports to be closed,close the ports and disconnect */ 2582 2583 /* free private structure allocated for serial port * 2584 * stop reads and writes on all ports */ 2585 2586 for (i = 0; i < serial->num_ports; ++i) { 2587 mos7840_port = mos7840_get_port_private(serial->port[i]); 2588 dbg ("mos7840_port %d = %p", i, mos7840_port); 2589 if (mos7840_port) { 2590 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2591 mos7840_port->zombie = 1; 2592 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2593 usb_kill_urb(mos7840_port->control_urb); 2594 } 2595 } 2596 2597 dbg("%s", "Thank u :: "); 2598 2599 } 2600 2601 /**************************************************************************** 2602 * mos7840_release 2603 * This function is called when the usb_serial structure is freed. 2604 ****************************************************************************/ 2605 2606 static void mos7840_release(struct usb_serial *serial) 2607 { 2608 int i; 2609 struct moschip_port *mos7840_port; 2610 dbg("%s", " release :entering.........."); 2611 2612 if (!serial) { 2613 dbg("%s", "Invalid Handler"); 2614 return; 2615 } 2616 2617 /* check for the ports to be closed,close the ports and disconnect */ 2618 2619 /* free private structure allocated for serial port * 2620 * stop reads and writes on all ports */ 2621 2622 for (i = 0; i < serial->num_ports; ++i) { 2623 mos7840_port = mos7840_get_port_private(serial->port[i]); 2624 dbg("mos7840_port %d = %p", i, mos7840_port); 2625 if (mos7840_port) { 2626 kfree(mos7840_port->ctrl_buf); 2627 kfree(mos7840_port->dr); 2628 kfree(mos7840_port); 2629 } 2630 } 2631 2632 dbg("%s", "Thank u :: "); 2633 2634 } 2635 2636 static struct usb_driver io_driver = { 2637 .name = "mos7840", 2638 .probe = usb_serial_probe, 2639 .disconnect = usb_serial_disconnect, 2640 .id_table = moschip_id_table_combined, 2641 .no_dynamic_id = 1, 2642 }; 2643 2644 static struct usb_serial_driver moschip7840_4port_device = { 2645 .driver = { 2646 .owner = THIS_MODULE, 2647 .name = "mos7840", 2648 }, 2649 .description = DRIVER_DESC, 2650 .usb_driver = &io_driver, 2651 .id_table = moschip_port_id_table, 2652 .num_ports = 4, 2653 .open = mos7840_open, 2654 .close = mos7840_close, 2655 .write = mos7840_write, 2656 .write_room = mos7840_write_room, 2657 .chars_in_buffer = mos7840_chars_in_buffer, 2658 .throttle = mos7840_throttle, 2659 .unthrottle = mos7840_unthrottle, 2660 .calc_num_ports = mos7840_calc_num_ports, 2661 #ifdef MCSSerialProbe 2662 .probe = mos7840_serial_probe, 2663 #endif 2664 .ioctl = mos7840_ioctl, 2665 .set_termios = mos7840_set_termios, 2666 .break_ctl = mos7840_break, 2667 .tiocmget = mos7840_tiocmget, 2668 .tiocmset = mos7840_tiocmset, 2669 .get_icount = mos7840_get_icount, 2670 .attach = mos7840_startup, 2671 .disconnect = mos7840_disconnect, 2672 .release = mos7840_release, 2673 .read_bulk_callback = mos7840_bulk_in_callback, 2674 .read_int_callback = mos7840_interrupt_callback, 2675 }; 2676 2677 /**************************************************************************** 2678 * moschip7840_init 2679 * This is called by the module subsystem, or on startup to initialize us 2680 ****************************************************************************/ 2681 static int __init moschip7840_init(void) 2682 { 2683 int retval; 2684 2685 dbg("%s", " mos7840_init :entering.........."); 2686 2687 /* Register with the usb serial */ 2688 retval = usb_serial_register(&moschip7840_4port_device); 2689 2690 if (retval) 2691 goto failed_port_device_register; 2692 2693 dbg("%s", "Entering..."); 2694 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2695 DRIVER_DESC "\n"); 2696 2697 /* Register with the usb */ 2698 retval = usb_register(&io_driver); 2699 if (retval == 0) { 2700 dbg("%s", "Leaving..."); 2701 return 0; 2702 } 2703 usb_serial_deregister(&moschip7840_4port_device); 2704 failed_port_device_register: 2705 return retval; 2706 } 2707 2708 /**************************************************************************** 2709 * moschip7840_exit 2710 * Called when the driver is about to be unloaded. 2711 ****************************************************************************/ 2712 static void __exit moschip7840_exit(void) 2713 { 2714 2715 dbg("%s", " mos7840_exit :entering.........."); 2716 2717 usb_deregister(&io_driver); 2718 2719 usb_serial_deregister(&moschip7840_4port_device); 2720 2721 dbg("%s", "Entering..."); 2722 } 2723 2724 module_init(moschip7840_init); 2725 module_exit(moschip7840_exit); 2726 2727 /* Module information */ 2728 MODULE_DESCRIPTION(DRIVER_DESC); 2729 MODULE_LICENSE("GPL"); 2730 2731 module_param(debug, bool, S_IRUGO | S_IWUSR); 2732 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2733