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 int 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->dev = serial->dev; 796 797 mos7840_port->read_urb_busy = true; 798 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 799 800 if (retval) { 801 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); 802 mos7840_port->read_urb_busy = false; 803 } 804 } 805 806 /***************************************************************************** 807 * mos7840_bulk_out_data_callback 808 * this is the callback function for when we have finished sending 809 * serial data on the bulk out endpoint. 810 *****************************************************************************/ 811 812 static void mos7840_bulk_out_data_callback(struct urb *urb) 813 { 814 struct moschip_port *mos7840_port; 815 struct tty_struct *tty; 816 int status = urb->status; 817 int i; 818 819 mos7840_port = urb->context; 820 spin_lock(&mos7840_port->pool_lock); 821 for (i = 0; i < NUM_URBS; i++) { 822 if (urb == mos7840_port->write_urb_pool[i]) { 823 mos7840_port->busy[i] = 0; 824 break; 825 } 826 } 827 spin_unlock(&mos7840_port->pool_lock); 828 829 if (status) { 830 dbg("nonzero write bulk status received:%d", status); 831 return; 832 } 833 834 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { 835 dbg("%s", "Port Paranoia failed"); 836 return; 837 } 838 839 dbg("%s", "Entering ........."); 840 841 tty = tty_port_tty_get(&mos7840_port->port->port); 842 if (tty && mos7840_port->open) 843 tty_wakeup(tty); 844 tty_kref_put(tty); 845 846 } 847 848 /************************************************************************/ 849 /* 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 */ 850 /************************************************************************/ 851 #ifdef MCSSerialProbe 852 static int mos7840_serial_probe(struct usb_serial *serial, 853 const struct usb_device_id *id) 854 { 855 856 /*need to implement the mode_reg reading and updating\ 857 structures usb_serial_ device_type\ 858 (i.e num_ports, num_bulkin,bulkout etc) */ 859 /* Also we can update the changes attach */ 860 return 1; 861 } 862 #endif 863 864 /***************************************************************************** 865 * mos7840_open 866 * this function is called by the tty driver when a port is opened 867 * If successful, we return 0 868 * Otherwise we return a negative error number. 869 *****************************************************************************/ 870 871 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 872 { 873 int response; 874 int j; 875 struct usb_serial *serial; 876 struct urb *urb; 877 __u16 Data; 878 int status; 879 struct moschip_port *mos7840_port; 880 struct moschip_port *port0; 881 882 dbg ("%s enter", __func__); 883 884 if (mos7840_port_paranoia_check(port, __func__)) { 885 dbg("%s", "Port Paranoia failed"); 886 return -ENODEV; 887 } 888 889 serial = port->serial; 890 891 if (mos7840_serial_paranoia_check(serial, __func__)) { 892 dbg("%s", "Serial Paranoia failed"); 893 return -ENODEV; 894 } 895 896 mos7840_port = mos7840_get_port_private(port); 897 port0 = mos7840_get_port_private(serial->port[0]); 898 899 if (mos7840_port == NULL || port0 == NULL) 900 return -ENODEV; 901 902 usb_clear_halt(serial->dev, port->write_urb->pipe); 903 usb_clear_halt(serial->dev, port->read_urb->pipe); 904 port0->open_ports++; 905 906 /* Initialising the write urb pool */ 907 for (j = 0; j < NUM_URBS; ++j) { 908 urb = usb_alloc_urb(0, GFP_KERNEL); 909 mos7840_port->write_urb_pool[j] = urb; 910 911 if (urb == NULL) { 912 dev_err(&port->dev, "No more urbs???\n"); 913 continue; 914 } 915 916 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 917 GFP_KERNEL); 918 if (!urb->transfer_buffer) { 919 usb_free_urb(urb); 920 mos7840_port->write_urb_pool[j] = NULL; 921 dev_err(&port->dev, 922 "%s-out of memory for urb buffers.\n", 923 __func__); 924 continue; 925 } 926 } 927 928 /***************************************************************************** 929 * Initialize MCS7840 -- Write Init values to corresponding Registers 930 * 931 * Register Index 932 * 1 : IER 933 * 2 : FCR 934 * 3 : LCR 935 * 4 : MCR 936 * 937 * 0x08 : SP1/2 Control Reg 938 *****************************************************************************/ 939 940 /* NEED to check the following Block */ 941 942 Data = 0x0; 943 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 944 if (status < 0) { 945 dbg("Reading Spreg failed"); 946 return -1; 947 } 948 Data |= 0x80; 949 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 950 if (status < 0) { 951 dbg("writing Spreg failed"); 952 return -1; 953 } 954 955 Data &= ~0x80; 956 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 957 if (status < 0) { 958 dbg("writing Spreg failed"); 959 return -1; 960 } 961 /* End of block to be checked */ 962 963 Data = 0x0; 964 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 965 &Data); 966 if (status < 0) { 967 dbg("Reading Controlreg failed"); 968 return -1; 969 } 970 Data |= 0x08; /* Driver done bit */ 971 Data |= 0x20; /* rx_disable */ 972 status = mos7840_set_reg_sync(port, 973 mos7840_port->ControlRegOffset, Data); 974 if (status < 0) { 975 dbg("writing Controlreg failed"); 976 return -1; 977 } 978 /* do register settings here */ 979 /* Set all regs to the device default values. */ 980 /*********************************** 981 * First Disable all interrupts. 982 ***********************************/ 983 Data = 0x00; 984 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 985 if (status < 0) { 986 dbg("disabling interrupts failed"); 987 return -1; 988 } 989 /* Set FIFO_CONTROL_REGISTER to the default value */ 990 Data = 0x00; 991 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 992 if (status < 0) { 993 dbg("Writing FIFO_CONTROL_REGISTER failed"); 994 return -1; 995 } 996 997 Data = 0xcf; 998 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 999 if (status < 0) { 1000 dbg("Writing FIFO_CONTROL_REGISTER failed"); 1001 return -1; 1002 } 1003 1004 Data = 0x03; 1005 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1006 mos7840_port->shadowLCR = Data; 1007 1008 Data = 0x0b; 1009 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1010 mos7840_port->shadowMCR = Data; 1011 1012 Data = 0x00; 1013 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1014 mos7840_port->shadowLCR = Data; 1015 1016 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1017 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1018 1019 Data = 0x0c; 1020 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1021 1022 Data = 0x0; 1023 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1024 1025 Data = 0x00; 1026 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1027 1028 Data = Data & ~SERIAL_LCR_DLAB; 1029 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1030 mos7840_port->shadowLCR = Data; 1031 1032 /* clearing Bulkin and Bulkout Fifo */ 1033 Data = 0x0; 1034 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1035 1036 Data = Data | 0x0c; 1037 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1038 1039 Data = Data & ~0x0c; 1040 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1041 /* Finally enable all interrupts */ 1042 Data = 0x0c; 1043 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1044 1045 /* clearing rx_disable */ 1046 Data = 0x0; 1047 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1048 &Data); 1049 Data = Data & ~0x20; 1050 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1051 Data); 1052 1053 /* rx_negate */ 1054 Data = 0x0; 1055 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1056 &Data); 1057 Data = Data | 0x10; 1058 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1059 Data); 1060 1061 /* Check to see if we've set up our endpoint info yet * 1062 * (can't set it up in mos7840_startup as the structures * 1063 * were not set up at that time.) */ 1064 if (port0->open_ports == 1) { 1065 if (serial->port[0]->interrupt_in_buffer == NULL) { 1066 /* set up interrupt urb */ 1067 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1068 serial->dev, 1069 usb_rcvintpipe(serial->dev, 1070 serial->port[0]->interrupt_in_endpointAddress), 1071 serial->port[0]->interrupt_in_buffer, 1072 serial->port[0]->interrupt_in_urb-> 1073 transfer_buffer_length, 1074 mos7840_interrupt_callback, 1075 serial, 1076 serial->port[0]->interrupt_in_urb->interval); 1077 1078 /* start interrupt read for mos7840 * 1079 * will continue as long as mos7840 is connected */ 1080 1081 response = 1082 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1083 GFP_KERNEL); 1084 if (response) { 1085 dev_err(&port->dev, "%s - Error %d submitting " 1086 "interrupt urb\n", __func__, response); 1087 } 1088 1089 } 1090 1091 } 1092 1093 /* see if we've set up our endpoint info yet * 1094 * (can't set it up in mos7840_startup as the * 1095 * structures were not set up at that time.) */ 1096 1097 dbg("port number is %d", port->number); 1098 dbg("serial number is %d", port->serial->minor); 1099 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); 1100 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); 1101 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); 1102 dbg("port's number in the device is %d", mos7840_port->port_num); 1103 mos7840_port->read_urb = port->read_urb; 1104 1105 /* set up our bulk in urb */ 1106 1107 usb_fill_bulk_urb(mos7840_port->read_urb, 1108 serial->dev, 1109 usb_rcvbulkpipe(serial->dev, 1110 port->bulk_in_endpointAddress), 1111 port->bulk_in_buffer, 1112 mos7840_port->read_urb->transfer_buffer_length, 1113 mos7840_bulk_in_callback, mos7840_port); 1114 1115 dbg("mos7840_open: bulkin endpoint is %d", 1116 port->bulk_in_endpointAddress); 1117 mos7840_port->read_urb_busy = true; 1118 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1119 if (response) { 1120 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1121 __func__, response); 1122 mos7840_port->read_urb_busy = false; 1123 } 1124 1125 /* initialize our wait queues */ 1126 init_waitqueue_head(&mos7840_port->wait_chase); 1127 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1128 1129 /* initialize our icount structure */ 1130 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1131 1132 /* initialize our port settings */ 1133 /* Must set to enable ints! */ 1134 mos7840_port->shadowMCR = MCR_MASTER_IE; 1135 /* send a open port command */ 1136 mos7840_port->open = 1; 1137 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1138 mos7840_port->icount.tx = 0; 1139 mos7840_port->icount.rx = 0; 1140 1141 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", 1142 serial, mos7840_port, port); 1143 1144 dbg ("%s leave", __func__); 1145 1146 return 0; 1147 1148 } 1149 1150 /***************************************************************************** 1151 * mos7840_chars_in_buffer 1152 * this function is called by the tty driver when it wants to know how many 1153 * bytes of data we currently have outstanding in the port (data that has 1154 * been written, but hasn't made it out the port yet) 1155 * If successful, we return the number of bytes left to be written in the 1156 * system, 1157 * Otherwise we return zero. 1158 *****************************************************************************/ 1159 1160 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1161 { 1162 struct usb_serial_port *port = tty->driver_data; 1163 int i; 1164 int chars = 0; 1165 unsigned long flags; 1166 struct moschip_port *mos7840_port; 1167 1168 dbg("%s", " mos7840_chars_in_buffer:entering ..........."); 1169 1170 if (mos7840_port_paranoia_check(port, __func__)) { 1171 dbg("%s", "Invalid port"); 1172 return 0; 1173 } 1174 1175 mos7840_port = mos7840_get_port_private(port); 1176 if (mos7840_port == NULL) { 1177 dbg("%s", "mos7840_break:leaving ..........."); 1178 return 0; 1179 } 1180 1181 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1182 for (i = 0; i < NUM_URBS; ++i) 1183 if (mos7840_port->busy[i]) 1184 chars += URB_TRANSFER_BUFFER_SIZE; 1185 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1186 dbg("%s - returns %d", __func__, chars); 1187 return chars; 1188 1189 } 1190 1191 /***************************************************************************** 1192 * mos7840_close 1193 * this function is called by the tty driver when a port is closed 1194 *****************************************************************************/ 1195 1196 static void mos7840_close(struct usb_serial_port *port) 1197 { 1198 struct usb_serial *serial; 1199 struct moschip_port *mos7840_port; 1200 struct moschip_port *port0; 1201 int j; 1202 __u16 Data; 1203 1204 dbg("%s", "mos7840_close:entering..."); 1205 1206 if (mos7840_port_paranoia_check(port, __func__)) { 1207 dbg("%s", "Port Paranoia failed"); 1208 return; 1209 } 1210 1211 serial = mos7840_get_usb_serial(port, __func__); 1212 if (!serial) { 1213 dbg("%s", "Serial Paranoia failed"); 1214 return; 1215 } 1216 1217 mos7840_port = mos7840_get_port_private(port); 1218 port0 = mos7840_get_port_private(serial->port[0]); 1219 1220 if (mos7840_port == NULL || port0 == NULL) 1221 return; 1222 1223 for (j = 0; j < NUM_URBS; ++j) 1224 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1225 1226 /* Freeing Write URBs */ 1227 for (j = 0; j < NUM_URBS; ++j) { 1228 if (mos7840_port->write_urb_pool[j]) { 1229 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1230 kfree(mos7840_port->write_urb_pool[j]-> 1231 transfer_buffer); 1232 1233 usb_free_urb(mos7840_port->write_urb_pool[j]); 1234 } 1235 } 1236 1237 /* While closing port, shutdown all bulk read, write * 1238 * and interrupt read if they exists */ 1239 if (serial->dev) { 1240 if (mos7840_port->write_urb) { 1241 dbg("%s", "Shutdown bulk write"); 1242 usb_kill_urb(mos7840_port->write_urb); 1243 } 1244 if (mos7840_port->read_urb) { 1245 dbg("%s", "Shutdown bulk read"); 1246 usb_kill_urb(mos7840_port->read_urb); 1247 mos7840_port->read_urb_busy = false; 1248 } 1249 if ((&mos7840_port->control_urb)) { 1250 dbg("%s", "Shutdown control read"); 1251 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1252 } 1253 } 1254 /* if(mos7840_port->ctrl_buf != NULL) */ 1255 /* kfree(mos7840_port->ctrl_buf); */ 1256 port0->open_ports--; 1257 dbg("mos7840_num_open_ports in close%d:in port%d", 1258 port0->open_ports, port->number); 1259 if (port0->open_ports == 0) { 1260 if (serial->port[0]->interrupt_in_urb) { 1261 dbg("%s", "Shutdown interrupt_in_urb"); 1262 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1263 } 1264 } 1265 1266 if (mos7840_port->write_urb) { 1267 /* if this urb had a transfer buffer already (old tx) free it */ 1268 if (mos7840_port->write_urb->transfer_buffer != NULL) 1269 kfree(mos7840_port->write_urb->transfer_buffer); 1270 usb_free_urb(mos7840_port->write_urb); 1271 } 1272 1273 Data = 0x0; 1274 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1275 1276 Data = 0x00; 1277 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1278 1279 mos7840_port->open = 0; 1280 1281 dbg("%s", "Leaving ............"); 1282 } 1283 1284 /************************************************************************ 1285 * 1286 * mos7840_block_until_chase_response 1287 * 1288 * This function will block the close until one of the following: 1289 * 1. Response to our Chase comes from mos7840 1290 * 2. A timeout of 10 seconds without activity has expired 1291 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1292 * 1293 ************************************************************************/ 1294 1295 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1296 struct moschip_port *mos7840_port) 1297 { 1298 int timeout = 1 * HZ; 1299 int wait = 10; 1300 int count; 1301 1302 while (1) { 1303 count = mos7840_chars_in_buffer(tty); 1304 1305 /* Check for Buffer status */ 1306 if (count <= 0) 1307 return; 1308 1309 /* Block the thread for a while */ 1310 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1311 timeout); 1312 /* No activity.. count down section */ 1313 wait--; 1314 if (wait == 0) { 1315 dbg("%s - TIMEOUT", __func__); 1316 return; 1317 } else { 1318 /* Reset timeout value back to seconds */ 1319 wait = 10; 1320 } 1321 } 1322 1323 } 1324 1325 /***************************************************************************** 1326 * mos7840_break 1327 * this function sends a break to the port 1328 *****************************************************************************/ 1329 static void mos7840_break(struct tty_struct *tty, int break_state) 1330 { 1331 struct usb_serial_port *port = tty->driver_data; 1332 unsigned char data; 1333 struct usb_serial *serial; 1334 struct moschip_port *mos7840_port; 1335 1336 dbg("%s", "Entering ..........."); 1337 dbg("mos7840_break: Start"); 1338 1339 if (mos7840_port_paranoia_check(port, __func__)) { 1340 dbg("%s", "Port Paranoia failed"); 1341 return; 1342 } 1343 1344 serial = mos7840_get_usb_serial(port, __func__); 1345 if (!serial) { 1346 dbg("%s", "Serial Paranoia failed"); 1347 return; 1348 } 1349 1350 mos7840_port = mos7840_get_port_private(port); 1351 1352 if (mos7840_port == NULL) 1353 return; 1354 1355 if (serial->dev) 1356 /* flush and block until tx is empty */ 1357 mos7840_block_until_chase_response(tty, mos7840_port); 1358 1359 if (break_state == -1) 1360 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1361 else 1362 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1363 1364 /* FIXME: no locking on shadowLCR anywhere in driver */ 1365 mos7840_port->shadowLCR = data; 1366 dbg("mcs7840_break mos7840_port->shadowLCR is %x", 1367 mos7840_port->shadowLCR); 1368 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1369 mos7840_port->shadowLCR); 1370 } 1371 1372 /***************************************************************************** 1373 * mos7840_write_room 1374 * this function is called by the tty driver when it wants to know how many 1375 * bytes of data we can accept for a specific port. 1376 * If successful, we return the amount of room that we have for this port 1377 * Otherwise we return a negative error number. 1378 *****************************************************************************/ 1379 1380 static int mos7840_write_room(struct tty_struct *tty) 1381 { 1382 struct usb_serial_port *port = tty->driver_data; 1383 int i; 1384 int room = 0; 1385 unsigned long flags; 1386 struct moschip_port *mos7840_port; 1387 1388 dbg("%s", " mos7840_write_room:entering ..........."); 1389 1390 if (mos7840_port_paranoia_check(port, __func__)) { 1391 dbg("%s", "Invalid port"); 1392 dbg("%s", " mos7840_write_room:leaving ..........."); 1393 return -1; 1394 } 1395 1396 mos7840_port = mos7840_get_port_private(port); 1397 if (mos7840_port == NULL) { 1398 dbg("%s", "mos7840_break:leaving ..........."); 1399 return -1; 1400 } 1401 1402 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1403 for (i = 0; i < NUM_URBS; ++i) { 1404 if (!mos7840_port->busy[i]) 1405 room += URB_TRANSFER_BUFFER_SIZE; 1406 } 1407 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1408 1409 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1410 dbg("%s - returns %d", __func__, room); 1411 return room; 1412 1413 } 1414 1415 /***************************************************************************** 1416 * mos7840_write 1417 * this function is called by the tty driver when data should be written to 1418 * the port. 1419 * If successful, we return the number of bytes written, otherwise we 1420 * return a negative error number. 1421 *****************************************************************************/ 1422 1423 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1424 const unsigned char *data, int count) 1425 { 1426 int status; 1427 int i; 1428 int bytes_sent = 0; 1429 int transfer_size; 1430 unsigned long flags; 1431 1432 struct moschip_port *mos7840_port; 1433 struct usb_serial *serial; 1434 struct urb *urb; 1435 /* __u16 Data; */ 1436 const unsigned char *current_position = data; 1437 unsigned char *data1; 1438 dbg("%s", "entering ..........."); 1439 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1440 mos7840_port->shadowLCR); */ 1441 1442 #ifdef NOTMOS7840 1443 Data = 0x00; 1444 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1445 mos7840_port->shadowLCR = Data; 1446 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); 1447 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1448 mos7840_port->shadowLCR); 1449 1450 /* Data = 0x03; */ 1451 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1452 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1453 1454 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1455 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1456 1457 /* Data = 0x0c; */ 1458 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1459 Data = 0x00; 1460 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1461 dbg("mos7840_write:DLL value is %x", Data); 1462 1463 Data = 0x0; 1464 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1465 dbg("mos7840_write:DLM value is %x", Data); 1466 1467 Data = Data & ~SERIAL_LCR_DLAB; 1468 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1469 mos7840_port->shadowLCR); 1470 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1471 #endif 1472 1473 if (mos7840_port_paranoia_check(port, __func__)) { 1474 dbg("%s", "Port Paranoia failed"); 1475 return -1; 1476 } 1477 1478 serial = port->serial; 1479 if (mos7840_serial_paranoia_check(serial, __func__)) { 1480 dbg("%s", "Serial Paranoia failed"); 1481 return -1; 1482 } 1483 1484 mos7840_port = mos7840_get_port_private(port); 1485 if (mos7840_port == NULL) { 1486 dbg("%s", "mos7840_port is NULL"); 1487 return -1; 1488 } 1489 1490 /* try to find a free urb in the list */ 1491 urb = NULL; 1492 1493 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1494 for (i = 0; i < NUM_URBS; ++i) { 1495 if (!mos7840_port->busy[i]) { 1496 mos7840_port->busy[i] = 1; 1497 urb = mos7840_port->write_urb_pool[i]; 1498 dbg("URB:%d", i); 1499 break; 1500 } 1501 } 1502 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1503 1504 if (urb == NULL) { 1505 dbg("%s - no more free urbs", __func__); 1506 goto exit; 1507 } 1508 1509 if (urb->transfer_buffer == NULL) { 1510 urb->transfer_buffer = 1511 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1512 1513 if (urb->transfer_buffer == NULL) { 1514 dev_err(&port->dev, "%s no more kernel memory...\n", 1515 __func__); 1516 goto exit; 1517 } 1518 } 1519 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1520 1521 memcpy(urb->transfer_buffer, current_position, transfer_size); 1522 1523 /* fill urb with data and submit */ 1524 usb_fill_bulk_urb(urb, 1525 serial->dev, 1526 usb_sndbulkpipe(serial->dev, 1527 port->bulk_out_endpointAddress), 1528 urb->transfer_buffer, 1529 transfer_size, 1530 mos7840_bulk_out_data_callback, mos7840_port); 1531 1532 data1 = urb->transfer_buffer; 1533 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); 1534 1535 /* send it down the pipe */ 1536 status = usb_submit_urb(urb, GFP_ATOMIC); 1537 1538 if (status) { 1539 mos7840_port->busy[i] = 0; 1540 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed " 1541 "with status = %d\n", __func__, status); 1542 bytes_sent = status; 1543 goto exit; 1544 } 1545 bytes_sent = transfer_size; 1546 mos7840_port->icount.tx += transfer_size; 1547 smp_wmb(); 1548 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); 1549 exit: 1550 return bytes_sent; 1551 1552 } 1553 1554 /***************************************************************************** 1555 * mos7840_throttle 1556 * this function is called by the tty driver when it wants to stop the data 1557 * being read from the port. 1558 *****************************************************************************/ 1559 1560 static void mos7840_throttle(struct tty_struct *tty) 1561 { 1562 struct usb_serial_port *port = tty->driver_data; 1563 struct moschip_port *mos7840_port; 1564 int status; 1565 1566 if (mos7840_port_paranoia_check(port, __func__)) { 1567 dbg("%s", "Invalid port"); 1568 return; 1569 } 1570 1571 dbg("- port %d", port->number); 1572 1573 mos7840_port = mos7840_get_port_private(port); 1574 1575 if (mos7840_port == NULL) 1576 return; 1577 1578 if (!mos7840_port->open) { 1579 dbg("%s", "port not opened"); 1580 return; 1581 } 1582 1583 dbg("%s", "Entering .........."); 1584 1585 /* if we are implementing XON/XOFF, send the stop character */ 1586 if (I_IXOFF(tty)) { 1587 unsigned char stop_char = STOP_CHAR(tty); 1588 status = mos7840_write(tty, port, &stop_char, 1); 1589 if (status <= 0) 1590 return; 1591 } 1592 /* if we are implementing RTS/CTS, toggle that line */ 1593 if (tty->termios->c_cflag & CRTSCTS) { 1594 mos7840_port->shadowMCR &= ~MCR_RTS; 1595 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1596 mos7840_port->shadowMCR); 1597 if (status < 0) 1598 return; 1599 } 1600 } 1601 1602 /***************************************************************************** 1603 * mos7840_unthrottle 1604 * this function is called by the tty driver when it wants to resume 1605 * the data being read from the port (called after mos7840_throttle is 1606 * called) 1607 *****************************************************************************/ 1608 static void mos7840_unthrottle(struct tty_struct *tty) 1609 { 1610 struct usb_serial_port *port = tty->driver_data; 1611 int status; 1612 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1613 1614 if (mos7840_port_paranoia_check(port, __func__)) { 1615 dbg("%s", "Invalid port"); 1616 return; 1617 } 1618 1619 if (mos7840_port == NULL) 1620 return; 1621 1622 if (!mos7840_port->open) { 1623 dbg("%s - port not opened", __func__); 1624 return; 1625 } 1626 1627 dbg("%s", "Entering .........."); 1628 1629 /* if we are implementing XON/XOFF, send the start character */ 1630 if (I_IXOFF(tty)) { 1631 unsigned char start_char = START_CHAR(tty); 1632 status = mos7840_write(tty, port, &start_char, 1); 1633 if (status <= 0) 1634 return; 1635 } 1636 1637 /* if we are implementing RTS/CTS, toggle that line */ 1638 if (tty->termios->c_cflag & CRTSCTS) { 1639 mos7840_port->shadowMCR |= MCR_RTS; 1640 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1641 mos7840_port->shadowMCR); 1642 if (status < 0) 1643 return; 1644 } 1645 } 1646 1647 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) 1648 { 1649 struct usb_serial_port *port = tty->driver_data; 1650 struct moschip_port *mos7840_port; 1651 unsigned int result; 1652 __u16 msr; 1653 __u16 mcr; 1654 int status; 1655 mos7840_port = mos7840_get_port_private(port); 1656 1657 dbg("%s - port %d", __func__, port->number); 1658 1659 if (mos7840_port == NULL) 1660 return -ENODEV; 1661 1662 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1663 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1664 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1665 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1666 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1667 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1668 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1669 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1670 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1671 1672 dbg("%s - 0x%04X", __func__, result); 1673 1674 return result; 1675 } 1676 1677 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, 1678 unsigned int set, unsigned int clear) 1679 { 1680 struct usb_serial_port *port = tty->driver_data; 1681 struct moschip_port *mos7840_port; 1682 unsigned int mcr; 1683 int status; 1684 1685 dbg("%s - port %d", __func__, port->number); 1686 1687 mos7840_port = mos7840_get_port_private(port); 1688 1689 if (mos7840_port == NULL) 1690 return -ENODEV; 1691 1692 /* FIXME: What locks the port registers ? */ 1693 mcr = mos7840_port->shadowMCR; 1694 if (clear & TIOCM_RTS) 1695 mcr &= ~MCR_RTS; 1696 if (clear & TIOCM_DTR) 1697 mcr &= ~MCR_DTR; 1698 if (clear & TIOCM_LOOP) 1699 mcr &= ~MCR_LOOPBACK; 1700 1701 if (set & TIOCM_RTS) 1702 mcr |= MCR_RTS; 1703 if (set & TIOCM_DTR) 1704 mcr |= MCR_DTR; 1705 if (set & TIOCM_LOOP) 1706 mcr |= MCR_LOOPBACK; 1707 1708 mos7840_port->shadowMCR = mcr; 1709 1710 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1711 if (status < 0) { 1712 dbg("setting MODEM_CONTROL_REGISTER Failed"); 1713 return status; 1714 } 1715 1716 return 0; 1717 } 1718 1719 /***************************************************************************** 1720 * mos7840_calc_baud_rate_divisor 1721 * this function calculates the proper baud rate divisor for the specified 1722 * baud rate. 1723 *****************************************************************************/ 1724 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1725 __u16 *clk_sel_val) 1726 { 1727 1728 dbg("%s - %d", __func__, baudRate); 1729 1730 if (baudRate <= 115200) { 1731 *divisor = 115200 / baudRate; 1732 *clk_sel_val = 0x0; 1733 } 1734 if ((baudRate > 115200) && (baudRate <= 230400)) { 1735 *divisor = 230400 / baudRate; 1736 *clk_sel_val = 0x10; 1737 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1738 *divisor = 403200 / baudRate; 1739 *clk_sel_val = 0x20; 1740 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1741 *divisor = 460800 / baudRate; 1742 *clk_sel_val = 0x30; 1743 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1744 *divisor = 806400 / baudRate; 1745 *clk_sel_val = 0x40; 1746 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1747 *divisor = 921600 / baudRate; 1748 *clk_sel_val = 0x50; 1749 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1750 *divisor = 1572864 / baudRate; 1751 *clk_sel_val = 0x60; 1752 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1753 *divisor = 3145728 / baudRate; 1754 *clk_sel_val = 0x70; 1755 } 1756 return 0; 1757 1758 #ifdef NOTMCS7840 1759 1760 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1761 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1762 *divisor = mos7840_divisor_table[i].Divisor; 1763 return 0; 1764 } 1765 } 1766 1767 /* After trying for all the standard baud rates * 1768 * Try calculating the divisor for this baud rate */ 1769 1770 if (baudrate > 75 && baudrate < 230400) { 1771 /* get the divisor */ 1772 custom = (__u16) (230400L / baudrate); 1773 1774 /* Check for round off */ 1775 round1 = (__u16) (2304000L / baudrate); 1776 round = (__u16) (round1 - (custom * 10)); 1777 if (round > 4) 1778 custom++; 1779 *divisor = custom; 1780 1781 dbg(" Baud %d = %d", baudrate, custom); 1782 return 0; 1783 } 1784 1785 dbg("%s", " Baud calculation Failed..."); 1786 return -1; 1787 #endif 1788 } 1789 1790 /***************************************************************************** 1791 * mos7840_send_cmd_write_baud_rate 1792 * this function sends the proper command to change the baud rate of the 1793 * specified port. 1794 *****************************************************************************/ 1795 1796 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1797 int baudRate) 1798 { 1799 int divisor = 0; 1800 int status; 1801 __u16 Data; 1802 unsigned char number; 1803 __u16 clk_sel_val; 1804 struct usb_serial_port *port; 1805 1806 if (mos7840_port == NULL) 1807 return -1; 1808 1809 port = (struct usb_serial_port *)mos7840_port->port; 1810 if (mos7840_port_paranoia_check(port, __func__)) { 1811 dbg("%s", "Invalid port"); 1812 return -1; 1813 } 1814 1815 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1816 dbg("%s", "Invalid Serial"); 1817 return -1; 1818 } 1819 1820 dbg("%s", "Entering .........."); 1821 1822 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1823 1824 dbg("%s - port = %d, baud = %d", __func__, 1825 mos7840_port->port->number, baudRate); 1826 /* reset clk_uart_sel in spregOffset */ 1827 if (baudRate > 115200) { 1828 #ifdef HW_flow_control 1829 /* NOTE: need to see the pther register to modify */ 1830 /* setting h/w flow control bit to 1 */ 1831 Data = 0x2b; 1832 mos7840_port->shadowMCR = Data; 1833 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1834 Data); 1835 if (status < 0) { 1836 dbg("Writing spreg failed in set_serial_baud"); 1837 return -1; 1838 } 1839 #endif 1840 1841 } else { 1842 #ifdef HW_flow_control 1843 / *setting h/w flow control bit to 0 */ 1844 Data = 0xb; 1845 mos7840_port->shadowMCR = Data; 1846 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1847 Data); 1848 if (status < 0) { 1849 dbg("Writing spreg failed in set_serial_baud"); 1850 return -1; 1851 } 1852 #endif 1853 1854 } 1855 1856 if (1) { /* baudRate <= 115200) */ 1857 clk_sel_val = 0x0; 1858 Data = 0x0; 1859 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1860 &clk_sel_val); 1861 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1862 &Data); 1863 if (status < 0) { 1864 dbg("reading spreg failed in set_serial_baud"); 1865 return -1; 1866 } 1867 Data = (Data & 0x8f) | clk_sel_val; 1868 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1869 Data); 1870 if (status < 0) { 1871 dbg("Writing spreg failed in set_serial_baud"); 1872 return -1; 1873 } 1874 /* Calculate the Divisor */ 1875 1876 if (status) { 1877 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1878 return status; 1879 } 1880 /* Enable access to divisor latch */ 1881 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1882 mos7840_port->shadowLCR = Data; 1883 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1884 1885 /* Write the divisor */ 1886 Data = (unsigned char)(divisor & 0xff); 1887 dbg("set_serial_baud Value to write DLL is %x", Data); 1888 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1889 1890 Data = (unsigned char)((divisor & 0xff00) >> 8); 1891 dbg("set_serial_baud Value to write DLM is %x", Data); 1892 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1893 1894 /* Disable access to divisor latch */ 1895 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1896 mos7840_port->shadowLCR = Data; 1897 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1898 1899 } 1900 return status; 1901 } 1902 1903 /***************************************************************************** 1904 * mos7840_change_port_settings 1905 * This routine is called to set the UART on the device to match 1906 * the specified new settings. 1907 *****************************************************************************/ 1908 1909 static void mos7840_change_port_settings(struct tty_struct *tty, 1910 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1911 { 1912 int baud; 1913 unsigned cflag; 1914 unsigned iflag; 1915 __u8 lData; 1916 __u8 lParity; 1917 __u8 lStop; 1918 int status; 1919 __u16 Data; 1920 struct usb_serial_port *port; 1921 struct usb_serial *serial; 1922 1923 if (mos7840_port == NULL) 1924 return; 1925 1926 port = (struct usb_serial_port *)mos7840_port->port; 1927 1928 if (mos7840_port_paranoia_check(port, __func__)) { 1929 dbg("%s", "Invalid port"); 1930 return; 1931 } 1932 1933 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1934 dbg("%s", "Invalid Serial"); 1935 return; 1936 } 1937 1938 serial = port->serial; 1939 1940 dbg("%s - port %d", __func__, mos7840_port->port->number); 1941 1942 if (!mos7840_port->open) { 1943 dbg("%s - port not opened", __func__); 1944 return; 1945 } 1946 1947 dbg("%s", "Entering .........."); 1948 1949 lData = LCR_BITS_8; 1950 lStop = LCR_STOP_1; 1951 lParity = LCR_PAR_NONE; 1952 1953 cflag = tty->termios->c_cflag; 1954 iflag = tty->termios->c_iflag; 1955 1956 /* Change the number of bits */ 1957 if (cflag & CSIZE) { 1958 switch (cflag & CSIZE) { 1959 case CS5: 1960 lData = LCR_BITS_5; 1961 break; 1962 1963 case CS6: 1964 lData = LCR_BITS_6; 1965 break; 1966 1967 case CS7: 1968 lData = LCR_BITS_7; 1969 break; 1970 default: 1971 case CS8: 1972 lData = LCR_BITS_8; 1973 break; 1974 } 1975 } 1976 /* Change the Parity bit */ 1977 if (cflag & PARENB) { 1978 if (cflag & PARODD) { 1979 lParity = LCR_PAR_ODD; 1980 dbg("%s - parity = odd", __func__); 1981 } else { 1982 lParity = LCR_PAR_EVEN; 1983 dbg("%s - parity = even", __func__); 1984 } 1985 1986 } else { 1987 dbg("%s - parity = none", __func__); 1988 } 1989 1990 if (cflag & CMSPAR) 1991 lParity = lParity | 0x20; 1992 1993 /* Change the Stop bit */ 1994 if (cflag & CSTOPB) { 1995 lStop = LCR_STOP_2; 1996 dbg("%s - stop bits = 2", __func__); 1997 } else { 1998 lStop = LCR_STOP_1; 1999 dbg("%s - stop bits = 1", __func__); 2000 } 2001 2002 /* Update the LCR with the correct value */ 2003 mos7840_port->shadowLCR &= 2004 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2005 mos7840_port->shadowLCR |= (lData | lParity | lStop); 2006 2007 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", 2008 mos7840_port->shadowLCR); 2009 /* Disable Interrupts */ 2010 Data = 0x00; 2011 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2012 2013 Data = 0x00; 2014 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2015 2016 Data = 0xcf; 2017 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2018 2019 /* Send the updated LCR value to the mos7840 */ 2020 Data = mos7840_port->shadowLCR; 2021 2022 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 2023 2024 Data = 0x00b; 2025 mos7840_port->shadowMCR = Data; 2026 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2027 Data = 0x00b; 2028 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2029 2030 /* set up the MCR register and send it to the mos7840 */ 2031 2032 mos7840_port->shadowMCR = MCR_MASTER_IE; 2033 if (cflag & CBAUD) 2034 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2035 2036 if (cflag & CRTSCTS) 2037 mos7840_port->shadowMCR |= (MCR_XON_ANY); 2038 else 2039 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2040 2041 Data = mos7840_port->shadowMCR; 2042 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2043 2044 /* Determine divisor based on baud rate */ 2045 baud = tty_get_baud_rate(tty); 2046 2047 if (!baud) { 2048 /* pick a default, any default... */ 2049 dbg("%s", "Picked default baud..."); 2050 baud = 9600; 2051 } 2052 2053 dbg("%s - baud rate = %d", __func__, baud); 2054 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2055 2056 /* Enable Interrupts */ 2057 Data = 0x0c; 2058 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2059 2060 if (mos7840_port->read_urb_busy == false) { 2061 mos7840_port->read_urb->dev = serial->dev; 2062 mos7840_port->read_urb_busy = true; 2063 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2064 if (status) { 2065 dbg("usb_submit_urb(read bulk) failed, status = %d", 2066 status); 2067 mos7840_port->read_urb_busy = false; 2068 } 2069 } 2070 wake_up(&mos7840_port->delta_msr_wait); 2071 mos7840_port->delta_msr_cond = 1; 2072 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", 2073 mos7840_port->shadowLCR); 2074 } 2075 2076 /***************************************************************************** 2077 * mos7840_set_termios 2078 * this function is called by the tty driver when it wants to change 2079 * the termios structure 2080 *****************************************************************************/ 2081 2082 static void mos7840_set_termios(struct tty_struct *tty, 2083 struct usb_serial_port *port, 2084 struct ktermios *old_termios) 2085 { 2086 int status; 2087 unsigned int cflag; 2088 struct usb_serial *serial; 2089 struct moschip_port *mos7840_port; 2090 dbg("mos7840_set_termios: START"); 2091 if (mos7840_port_paranoia_check(port, __func__)) { 2092 dbg("%s", "Invalid port"); 2093 return; 2094 } 2095 2096 serial = port->serial; 2097 2098 if (mos7840_serial_paranoia_check(serial, __func__)) { 2099 dbg("%s", "Invalid Serial"); 2100 return; 2101 } 2102 2103 mos7840_port = mos7840_get_port_private(port); 2104 2105 if (mos7840_port == NULL) 2106 return; 2107 2108 if (!mos7840_port->open) { 2109 dbg("%s - port not opened", __func__); 2110 return; 2111 } 2112 2113 dbg("%s", "setting termios - "); 2114 2115 cflag = tty->termios->c_cflag; 2116 2117 dbg("%s - clfag %08x iflag %08x", __func__, 2118 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2119 dbg("%s - old clfag %08x old iflag %08x", __func__, 2120 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2121 dbg("%s - port %d", __func__, port->number); 2122 2123 /* change the port settings to the new ones specified */ 2124 2125 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2126 2127 if (!mos7840_port->read_urb) { 2128 dbg("%s", "URB KILLED !!!!!"); 2129 return; 2130 } 2131 2132 if (mos7840_port->read_urb_busy == false) { 2133 mos7840_port->read_urb->dev = serial->dev; 2134 mos7840_port->read_urb_busy = true; 2135 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2136 if (status) { 2137 dbg("usb_submit_urb(read bulk) failed, status = %d", 2138 status); 2139 mos7840_port->read_urb_busy = false; 2140 } 2141 } 2142 } 2143 2144 /***************************************************************************** 2145 * mos7840_get_lsr_info - get line status register info 2146 * 2147 * Purpose: Let user call ioctl() to get info when the UART physically 2148 * is emptied. On bus types like RS485, the transmitter must 2149 * release the bus after transmitting. This must be done when 2150 * the transmit shift register is empty, not be done when the 2151 * transmit holding register is empty. This functionality 2152 * allows an RS485 driver to be written in user space. 2153 *****************************************************************************/ 2154 2155 static int mos7840_get_lsr_info(struct tty_struct *tty, 2156 unsigned int __user *value) 2157 { 2158 int count; 2159 unsigned int result = 0; 2160 2161 count = mos7840_chars_in_buffer(tty); 2162 if (count == 0) { 2163 dbg("%s -- Empty", __func__); 2164 result = TIOCSER_TEMT; 2165 } 2166 2167 if (copy_to_user(value, &result, sizeof(int))) 2168 return -EFAULT; 2169 return 0; 2170 } 2171 2172 /***************************************************************************** 2173 * mos7840_get_serial_info 2174 * function to get information about serial port 2175 *****************************************************************************/ 2176 2177 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2178 struct serial_struct __user *retinfo) 2179 { 2180 struct serial_struct tmp; 2181 2182 if (mos7840_port == NULL) 2183 return -1; 2184 2185 if (!retinfo) 2186 return -EFAULT; 2187 2188 memset(&tmp, 0, sizeof(tmp)); 2189 2190 tmp.type = PORT_16550A; 2191 tmp.line = mos7840_port->port->serial->minor; 2192 tmp.port = mos7840_port->port->number; 2193 tmp.irq = 0; 2194 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2195 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2196 tmp.baud_base = 9600; 2197 tmp.close_delay = 5 * HZ; 2198 tmp.closing_wait = 30 * HZ; 2199 2200 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2201 return -EFAULT; 2202 return 0; 2203 } 2204 2205 static int mos7840_get_icount(struct tty_struct *tty, 2206 struct serial_icounter_struct *icount) 2207 { 2208 struct usb_serial_port *port = tty->driver_data; 2209 struct moschip_port *mos7840_port; 2210 struct async_icount cnow; 2211 2212 mos7840_port = mos7840_get_port_private(port); 2213 cnow = mos7840_port->icount; 2214 2215 smp_rmb(); 2216 icount->cts = cnow.cts; 2217 icount->dsr = cnow.dsr; 2218 icount->rng = cnow.rng; 2219 icount->dcd = cnow.dcd; 2220 icount->rx = cnow.rx; 2221 icount->tx = cnow.tx; 2222 icount->frame = cnow.frame; 2223 icount->overrun = cnow.overrun; 2224 icount->parity = cnow.parity; 2225 icount->brk = cnow.brk; 2226 icount->buf_overrun = cnow.buf_overrun; 2227 2228 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2229 port->number, icount->rx, icount->tx); 2230 return 0; 2231 } 2232 2233 /***************************************************************************** 2234 * SerialIoctl 2235 * this function handles any ioctl calls to the driver 2236 *****************************************************************************/ 2237 2238 static int mos7840_ioctl(struct tty_struct *tty, struct file *file, 2239 unsigned int cmd, unsigned long arg) 2240 { 2241 struct usb_serial_port *port = tty->driver_data; 2242 void __user *argp = (void __user *)arg; 2243 struct moschip_port *mos7840_port; 2244 2245 struct async_icount cnow; 2246 struct async_icount cprev; 2247 2248 if (mos7840_port_paranoia_check(port, __func__)) { 2249 dbg("%s", "Invalid port"); 2250 return -1; 2251 } 2252 2253 mos7840_port = mos7840_get_port_private(port); 2254 2255 if (mos7840_port == NULL) 2256 return -1; 2257 2258 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2259 2260 switch (cmd) { 2261 /* return number of bytes available */ 2262 2263 case TIOCSERGETLSR: 2264 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2265 return mos7840_get_lsr_info(tty, argp); 2266 return 0; 2267 2268 case TIOCGSERIAL: 2269 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2270 return mos7840_get_serial_info(mos7840_port, argp); 2271 2272 case TIOCSSERIAL: 2273 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2274 break; 2275 2276 case TIOCMIWAIT: 2277 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2278 cprev = mos7840_port->icount; 2279 while (1) { 2280 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2281 mos7840_port->delta_msr_cond = 0; 2282 wait_event_interruptible(mos7840_port->delta_msr_wait, 2283 (mos7840_port-> 2284 delta_msr_cond == 1)); 2285 2286 /* see if a signal did it */ 2287 if (signal_pending(current)) 2288 return -ERESTARTSYS; 2289 cnow = mos7840_port->icount; 2290 smp_rmb(); 2291 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2292 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2293 return -EIO; /* no change => error */ 2294 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2295 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2296 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2297 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2298 return 0; 2299 } 2300 cprev = cnow; 2301 } 2302 /* NOTREACHED */ 2303 break; 2304 2305 default: 2306 break; 2307 } 2308 return -ENOIOCTLCMD; 2309 } 2310 2311 static int mos7840_calc_num_ports(struct usb_serial *serial) 2312 { 2313 int mos7840_num_ports = 0; 2314 2315 dbg("numberofendpoints: cur %d, alt %d", 2316 (int)serial->interface->cur_altsetting->desc.bNumEndpoints, 2317 (int)serial->interface->altsetting->desc.bNumEndpoints); 2318 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { 2319 mos7840_num_ports = serial->num_ports = 2; 2320 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { 2321 serial->num_bulk_in = 4; 2322 serial->num_bulk_out = 4; 2323 mos7840_num_ports = serial->num_ports = 4; 2324 } 2325 dbg ("mos7840_num_ports = %d", mos7840_num_ports); 2326 return mos7840_num_ports; 2327 } 2328 2329 /**************************************************************************** 2330 * mos7840_startup 2331 ****************************************************************************/ 2332 2333 static int mos7840_startup(struct usb_serial *serial) 2334 { 2335 struct moschip_port *mos7840_port; 2336 struct usb_device *dev; 2337 int i, status; 2338 2339 __u16 Data; 2340 dbg("%s", "mos7840_startup :Entering.........."); 2341 2342 if (!serial) { 2343 dbg("%s", "Invalid Handler"); 2344 return -1; 2345 } 2346 2347 dev = serial->dev; 2348 2349 dbg("%s", "Entering..."); 2350 dbg ("mos7840_startup: serial = %p", serial); 2351 2352 /* we set up the pointers to the endpoints in the mos7840_open * 2353 * function, as the structures aren't created yet. */ 2354 2355 /* set up port private structures */ 2356 for (i = 0; i < serial->num_ports; ++i) { 2357 dbg ("mos7840_startup: configuring port %d............", i); 2358 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2359 if (mos7840_port == NULL) { 2360 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2361 status = -ENOMEM; 2362 i--; /* don't follow NULL pointer cleaning up */ 2363 goto error; 2364 } 2365 2366 /* Initialize all port interrupt end point to port 0 int 2367 * endpoint. Our device has only one interrupt end point 2368 * common to all port */ 2369 2370 mos7840_port->port = serial->port[i]; 2371 mos7840_set_port_private(serial->port[i], mos7840_port); 2372 spin_lock_init(&mos7840_port->pool_lock); 2373 2374 /* minor is not initialised until later by 2375 * usb-serial.c:get_free_serial() and cannot therefore be used 2376 * to index device instances */ 2377 mos7840_port->port_num = i + 1; 2378 dbg ("serial->port[i]->number = %d", serial->port[i]->number); 2379 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); 2380 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); 2381 dbg ("serial->minor = %d", serial->minor); 2382 2383 if (mos7840_port->port_num == 1) { 2384 mos7840_port->SpRegOffset = 0x0; 2385 mos7840_port->ControlRegOffset = 0x1; 2386 mos7840_port->DcrRegOffset = 0x4; 2387 } else if ((mos7840_port->port_num == 2) 2388 && (serial->num_ports == 4)) { 2389 mos7840_port->SpRegOffset = 0x8; 2390 mos7840_port->ControlRegOffset = 0x9; 2391 mos7840_port->DcrRegOffset = 0x16; 2392 } else if ((mos7840_port->port_num == 2) 2393 && (serial->num_ports == 2)) { 2394 mos7840_port->SpRegOffset = 0xa; 2395 mos7840_port->ControlRegOffset = 0xb; 2396 mos7840_port->DcrRegOffset = 0x19; 2397 } else if ((mos7840_port->port_num == 3) 2398 && (serial->num_ports == 4)) { 2399 mos7840_port->SpRegOffset = 0xa; 2400 mos7840_port->ControlRegOffset = 0xb; 2401 mos7840_port->DcrRegOffset = 0x19; 2402 } else if ((mos7840_port->port_num == 4) 2403 && (serial->num_ports == 4)) { 2404 mos7840_port->SpRegOffset = 0xc; 2405 mos7840_port->ControlRegOffset = 0xd; 2406 mos7840_port->DcrRegOffset = 0x1c; 2407 } 2408 mos7840_dump_serial_port(mos7840_port); 2409 mos7840_set_port_private(serial->port[i], mos7840_port); 2410 2411 /* enable rx_disable bit in control register */ 2412 status = mos7840_get_reg_sync(serial->port[i], 2413 mos7840_port->ControlRegOffset, &Data); 2414 if (status < 0) { 2415 dbg("Reading ControlReg failed status-0x%x", status); 2416 break; 2417 } else 2418 dbg("ControlReg Reading success val is %x, status%d", 2419 Data, status); 2420 Data |= 0x08; /* setting driver done bit */ 2421 Data |= 0x04; /* sp1_bit to have cts change reflect in 2422 modem status reg */ 2423 2424 /* Data |= 0x20; //rx_disable bit */ 2425 status = mos7840_set_reg_sync(serial->port[i], 2426 mos7840_port->ControlRegOffset, Data); 2427 if (status < 0) { 2428 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); 2429 break; 2430 } else 2431 dbg("ControlReg Writing success(rx_disable) status%d", 2432 status); 2433 2434 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2435 and 0x24 in DCR3 */ 2436 Data = 0x01; 2437 status = mos7840_set_reg_sync(serial->port[i], 2438 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2439 if (status < 0) { 2440 dbg("Writing DCR0 failed status-0x%x", status); 2441 break; 2442 } else 2443 dbg("DCR0 Writing success status%d", status); 2444 2445 Data = 0x05; 2446 status = mos7840_set_reg_sync(serial->port[i], 2447 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2448 if (status < 0) { 2449 dbg("Writing DCR1 failed status-0x%x", status); 2450 break; 2451 } else 2452 dbg("DCR1 Writing success status%d", status); 2453 2454 Data = 0x24; 2455 status = mos7840_set_reg_sync(serial->port[i], 2456 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2457 if (status < 0) { 2458 dbg("Writing DCR2 failed status-0x%x", status); 2459 break; 2460 } else 2461 dbg("DCR2 Writing success status%d", status); 2462 2463 /* write values in clkstart0x0 and clkmulti 0x20 */ 2464 Data = 0x0; 2465 status = mos7840_set_reg_sync(serial->port[i], 2466 CLK_START_VALUE_REGISTER, Data); 2467 if (status < 0) { 2468 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); 2469 break; 2470 } else 2471 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); 2472 2473 Data = 0x20; 2474 status = mos7840_set_reg_sync(serial->port[i], 2475 CLK_MULTI_REGISTER, Data); 2476 if (status < 0) { 2477 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", 2478 status); 2479 goto error; 2480 } else 2481 dbg("CLK_MULTI_REGISTER Writing success status%d", 2482 status); 2483 2484 /* write value 0x0 to scratchpad register */ 2485 Data = 0x00; 2486 status = mos7840_set_uart_reg(serial->port[i], 2487 SCRATCH_PAD_REGISTER, Data); 2488 if (status < 0) { 2489 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", 2490 status); 2491 break; 2492 } else 2493 dbg("SCRATCH_PAD_REGISTER Writing success status%d", 2494 status); 2495 2496 /* Zero Length flag register */ 2497 if ((mos7840_port->port_num != 1) 2498 && (serial->num_ports == 2)) { 2499 2500 Data = 0xff; 2501 status = mos7840_set_reg_sync(serial->port[i], 2502 (__u16) (ZLP_REG1 + 2503 ((__u16)mos7840_port->port_num)), Data); 2504 dbg("ZLIP offset %x", 2505 (__u16) (ZLP_REG1 + 2506 ((__u16) mos7840_port->port_num))); 2507 if (status < 0) { 2508 dbg("Writing ZLP_REG%d failed status-0x%x", 2509 i + 2, status); 2510 break; 2511 } else 2512 dbg("ZLP_REG%d Writing success status%d", 2513 i + 2, status); 2514 } else { 2515 Data = 0xff; 2516 status = mos7840_set_reg_sync(serial->port[i], 2517 (__u16) (ZLP_REG1 + 2518 ((__u16)mos7840_port->port_num) - 0x1), Data); 2519 dbg("ZLIP offset %x", 2520 (__u16) (ZLP_REG1 + 2521 ((__u16) mos7840_port->port_num) - 0x1)); 2522 if (status < 0) { 2523 dbg("Writing ZLP_REG%d failed status-0x%x", 2524 i + 1, status); 2525 break; 2526 } else 2527 dbg("ZLP_REG%d Writing success status%d", 2528 i + 1, status); 2529 2530 } 2531 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2532 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2533 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2534 GFP_KERNEL); 2535 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2536 !mos7840_port->dr) { 2537 status = -ENOMEM; 2538 goto error; 2539 } 2540 } 2541 dbg ("mos7840_startup: all ports configured..........."); 2542 2543 /* Zero Length flag enable */ 2544 Data = 0x0f; 2545 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2546 if (status < 0) { 2547 dbg("Writing ZLP_REG5 failed status-0x%x", status); 2548 goto error; 2549 } else 2550 dbg("ZLP_REG5 Writing success status%d", status); 2551 2552 /* setting configuration feature to one */ 2553 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2554 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2555 return 0; 2556 error: 2557 for (/* nothing */; i >= 0; i--) { 2558 mos7840_port = mos7840_get_port_private(serial->port[i]); 2559 2560 kfree(mos7840_port->dr); 2561 kfree(mos7840_port->ctrl_buf); 2562 usb_free_urb(mos7840_port->control_urb); 2563 kfree(mos7840_port); 2564 serial->port[i] = NULL; 2565 } 2566 return status; 2567 } 2568 2569 /**************************************************************************** 2570 * mos7840_disconnect 2571 * This function is called whenever the device is removed from the usb bus. 2572 ****************************************************************************/ 2573 2574 static void mos7840_disconnect(struct usb_serial *serial) 2575 { 2576 int i; 2577 unsigned long flags; 2578 struct moschip_port *mos7840_port; 2579 dbg("%s", " disconnect :entering.........."); 2580 2581 if (!serial) { 2582 dbg("%s", "Invalid Handler"); 2583 return; 2584 } 2585 2586 /* check for the ports to be closed,close the ports and disconnect */ 2587 2588 /* free private structure allocated for serial port * 2589 * stop reads and writes on all ports */ 2590 2591 for (i = 0; i < serial->num_ports; ++i) { 2592 mos7840_port = mos7840_get_port_private(serial->port[i]); 2593 dbg ("mos7840_port %d = %p", i, mos7840_port); 2594 if (mos7840_port) { 2595 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2596 mos7840_port->zombie = 1; 2597 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2598 usb_kill_urb(mos7840_port->control_urb); 2599 } 2600 } 2601 2602 dbg("%s", "Thank u :: "); 2603 2604 } 2605 2606 /**************************************************************************** 2607 * mos7840_release 2608 * This function is called when the usb_serial structure is freed. 2609 ****************************************************************************/ 2610 2611 static void mos7840_release(struct usb_serial *serial) 2612 { 2613 int i; 2614 struct moschip_port *mos7840_port; 2615 dbg("%s", " release :entering.........."); 2616 2617 if (!serial) { 2618 dbg("%s", "Invalid Handler"); 2619 return; 2620 } 2621 2622 /* check for the ports to be closed,close the ports and disconnect */ 2623 2624 /* free private structure allocated for serial port * 2625 * stop reads and writes on all ports */ 2626 2627 for (i = 0; i < serial->num_ports; ++i) { 2628 mos7840_port = mos7840_get_port_private(serial->port[i]); 2629 dbg("mos7840_port %d = %p", i, mos7840_port); 2630 if (mos7840_port) { 2631 kfree(mos7840_port->ctrl_buf); 2632 kfree(mos7840_port->dr); 2633 kfree(mos7840_port); 2634 } 2635 } 2636 2637 dbg("%s", "Thank u :: "); 2638 2639 } 2640 2641 static struct usb_driver io_driver = { 2642 .name = "mos7840", 2643 .probe = usb_serial_probe, 2644 .disconnect = usb_serial_disconnect, 2645 .id_table = moschip_id_table_combined, 2646 .no_dynamic_id = 1, 2647 }; 2648 2649 static struct usb_serial_driver moschip7840_4port_device = { 2650 .driver = { 2651 .owner = THIS_MODULE, 2652 .name = "mos7840", 2653 }, 2654 .description = DRIVER_DESC, 2655 .usb_driver = &io_driver, 2656 .id_table = moschip_port_id_table, 2657 .num_ports = 4, 2658 .open = mos7840_open, 2659 .close = mos7840_close, 2660 .write = mos7840_write, 2661 .write_room = mos7840_write_room, 2662 .chars_in_buffer = mos7840_chars_in_buffer, 2663 .throttle = mos7840_throttle, 2664 .unthrottle = mos7840_unthrottle, 2665 .calc_num_ports = mos7840_calc_num_ports, 2666 #ifdef MCSSerialProbe 2667 .probe = mos7840_serial_probe, 2668 #endif 2669 .ioctl = mos7840_ioctl, 2670 .set_termios = mos7840_set_termios, 2671 .break_ctl = mos7840_break, 2672 .tiocmget = mos7840_tiocmget, 2673 .tiocmset = mos7840_tiocmset, 2674 .get_icount = mos7840_get_icount, 2675 .attach = mos7840_startup, 2676 .disconnect = mos7840_disconnect, 2677 .release = mos7840_release, 2678 .read_bulk_callback = mos7840_bulk_in_callback, 2679 .read_int_callback = mos7840_interrupt_callback, 2680 }; 2681 2682 /**************************************************************************** 2683 * moschip7840_init 2684 * This is called by the module subsystem, or on startup to initialize us 2685 ****************************************************************************/ 2686 static int __init moschip7840_init(void) 2687 { 2688 int retval; 2689 2690 dbg("%s", " mos7840_init :entering.........."); 2691 2692 /* Register with the usb serial */ 2693 retval = usb_serial_register(&moschip7840_4port_device); 2694 2695 if (retval) 2696 goto failed_port_device_register; 2697 2698 dbg("%s", "Entering..."); 2699 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2700 DRIVER_DESC "\n"); 2701 2702 /* Register with the usb */ 2703 retval = usb_register(&io_driver); 2704 if (retval == 0) { 2705 dbg("%s", "Leaving..."); 2706 return 0; 2707 } 2708 usb_serial_deregister(&moschip7840_4port_device); 2709 failed_port_device_register: 2710 return retval; 2711 } 2712 2713 /**************************************************************************** 2714 * moschip7840_exit 2715 * Called when the driver is about to be unloaded. 2716 ****************************************************************************/ 2717 static void __exit moschip7840_exit(void) 2718 { 2719 2720 dbg("%s", " mos7840_exit :entering.........."); 2721 2722 usb_deregister(&io_driver); 2723 2724 usb_serial_deregister(&moschip7840_4port_device); 2725 2726 dbg("%s", "Entering..."); 2727 } 2728 2729 module_init(moschip7840_init); 2730 module_exit(moschip7840_exit); 2731 2732 /* Module information */ 2733 MODULE_DESCRIPTION(DRIVER_DESC); 2734 MODULE_LICENSE("GPL"); 2735 2736 module_param(debug, bool, S_IRUGO | S_IWUSR); 2737 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2738