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 #define MOSCHIP_DEVICE_ID_7810 0x7810 118 /* The native component can have its vendor/device id's overridden 119 * in vendor-specific implementations. Such devices can be handled 120 * by making a change here, in id_table. 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 #define GPIO_REGISTER ((__u16)(0x07)) 178 179 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 180 181 /* 182 * URB POOL related defines 183 */ 184 #define NUM_URBS 16 /* URB Count */ 185 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 186 187 /* LED on/off milliseconds*/ 188 #define LED_ON_MS 500 189 #define LED_OFF_MS 500 190 191 static int device_type; 192 193 static const struct usb_device_id id_table[] = { 194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 195 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 196 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 208 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 209 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 210 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 211 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 212 {} /* terminating entry */ 213 }; 214 MODULE_DEVICE_TABLE(usb, id_table); 215 216 /* This structure holds all of the local port information */ 217 218 struct moschip_port { 219 int port_num; /*Actual port number in the device(1,2,etc) */ 220 struct urb *write_urb; /* write URB for this port */ 221 struct urb *read_urb; /* read URB for this port */ 222 struct urb *int_urb; 223 __u8 shadowLCR; /* last LCR value received */ 224 __u8 shadowMCR; /* last MCR value received */ 225 char open; 226 char open_ports; 227 char zombie; 228 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 229 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 230 int delta_msr_cond; 231 struct async_icount icount; 232 struct usb_serial_port *port; /* loop back to the owner of this object */ 233 234 /* Offsets */ 235 __u8 SpRegOffset; 236 __u8 ControlRegOffset; 237 __u8 DcrRegOffset; 238 /* for processing control URBS in interrupt context */ 239 struct urb *control_urb; 240 struct usb_ctrlrequest *dr; 241 char *ctrl_buf; 242 int MsrLsr; 243 244 spinlock_t pool_lock; 245 struct urb *write_urb_pool[NUM_URBS]; 246 char busy[NUM_URBS]; 247 bool read_urb_busy; 248 249 /* For device(s) with LED indicator */ 250 bool has_led; 251 bool led_flag; 252 struct timer_list led_timer1; /* Timer for LED on */ 253 struct timer_list led_timer2; /* Timer for LED off */ 254 }; 255 256 static bool debug; 257 258 /* 259 * mos7840_set_reg_sync 260 * To set the Control register by calling usb_fill_control_urb function 261 * by passing usb_sndctrlpipe function as parameter. 262 */ 263 264 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 265 __u16 val) 266 { 267 struct usb_device *dev = port->serial->dev; 268 val = val & 0x00ff; 269 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val); 270 271 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 272 MCS_WR_RTYPE, val, reg, NULL, 0, 273 MOS_WDR_TIMEOUT); 274 } 275 276 /* 277 * mos7840_get_reg_sync 278 * To set the Uart register by calling usb_fill_control_urb function by 279 * passing usb_rcvctrlpipe function as parameter. 280 */ 281 282 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 283 __u16 *val) 284 { 285 struct usb_device *dev = port->serial->dev; 286 int ret = 0; 287 u8 *buf; 288 289 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 290 if (!buf) 291 return -ENOMEM; 292 293 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 294 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 295 MOS_WDR_TIMEOUT); 296 *val = buf[0]; 297 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val); 298 299 kfree(buf); 300 return ret; 301 } 302 303 /* 304 * mos7840_set_uart_reg 305 * To set the Uart register by calling usb_fill_control_urb function by 306 * passing usb_sndctrlpipe function as parameter. 307 */ 308 309 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 310 __u16 val) 311 { 312 313 struct usb_device *dev = port->serial->dev; 314 val = val & 0x00ff; 315 /* For the UART control registers, the application number need 316 to be Or'ed */ 317 if (port->serial->num_ports == 4) { 318 val |= (((__u16) port->number - 319 (__u16) (port->serial->minor)) + 1) << 8; 320 dbg("mos7840_set_uart_reg application number is %x", val); 321 } else { 322 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 323 val |= (((__u16) port->number - 324 (__u16) (port->serial->minor)) + 1) << 8; 325 dbg("mos7840_set_uart_reg application number is %x", 326 val); 327 } else { 328 val |= 329 (((__u16) port->number - 330 (__u16) (port->serial->minor)) + 2) << 8; 331 dbg("mos7840_set_uart_reg application number is %x", 332 val); 333 } 334 } 335 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 336 MCS_WR_RTYPE, val, reg, NULL, 0, 337 MOS_WDR_TIMEOUT); 338 339 } 340 341 /* 342 * mos7840_get_uart_reg 343 * To set the Control register by calling usb_fill_control_urb function 344 * by passing usb_rcvctrlpipe function as parameter. 345 */ 346 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 347 __u16 *val) 348 { 349 struct usb_device *dev = port->serial->dev; 350 int ret = 0; 351 __u16 Wval; 352 u8 *buf; 353 354 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 355 if (!buf) 356 return -ENOMEM; 357 358 /* dbg("application number is %4x", 359 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ 360 /* Wval is same as application number */ 361 if (port->serial->num_ports == 4) { 362 Wval = 363 (((__u16) port->number - (__u16) (port->serial->minor)) + 364 1) << 8; 365 dbg("mos7840_get_uart_reg application number is %x", Wval); 366 } else { 367 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 368 Wval = (((__u16) port->number - 369 (__u16) (port->serial->minor)) + 1) << 8; 370 dbg("mos7840_get_uart_reg application number is %x", 371 Wval); 372 } else { 373 Wval = (((__u16) port->number - 374 (__u16) (port->serial->minor)) + 2) << 8; 375 dbg("mos7840_get_uart_reg application number is %x", 376 Wval); 377 } 378 } 379 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 380 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 381 MOS_WDR_TIMEOUT); 382 *val = buf[0]; 383 384 kfree(buf); 385 return ret; 386 } 387 388 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) 389 { 390 391 dbg("***************************************"); 392 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset); 393 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset); 394 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset); 395 dbg("***************************************"); 396 397 } 398 399 /************************************************************************/ 400 /************************************************************************/ 401 /* I N T E R F A C E F U N C T I O N S */ 402 /* I N T E R F A C E F U N C T I O N S */ 403 /************************************************************************/ 404 /************************************************************************/ 405 406 static inline void mos7840_set_port_private(struct usb_serial_port *port, 407 struct moschip_port *data) 408 { 409 usb_set_serial_port_data(port, (void *)data); 410 } 411 412 static inline struct moschip_port *mos7840_get_port_private(struct 413 usb_serial_port 414 *port) 415 { 416 return (struct moschip_port *)usb_get_serial_port_data(port); 417 } 418 419 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 420 { 421 struct moschip_port *mos7840_port; 422 struct async_icount *icount; 423 mos7840_port = port; 424 icount = &mos7840_port->icount; 425 if (new_msr & 426 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 427 MOS_MSR_DELTA_CD)) { 428 icount = &mos7840_port->icount; 429 430 /* update input line counters */ 431 if (new_msr & MOS_MSR_DELTA_CTS) { 432 icount->cts++; 433 smp_wmb(); 434 } 435 if (new_msr & MOS_MSR_DELTA_DSR) { 436 icount->dsr++; 437 smp_wmb(); 438 } 439 if (new_msr & MOS_MSR_DELTA_CD) { 440 icount->dcd++; 441 smp_wmb(); 442 } 443 if (new_msr & MOS_MSR_DELTA_RI) { 444 icount->rng++; 445 smp_wmb(); 446 } 447 } 448 } 449 450 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 451 { 452 struct async_icount *icount; 453 454 dbg("%s - %02x", __func__, new_lsr); 455 456 if (new_lsr & SERIAL_LSR_BI) { 457 /* 458 * Parity and Framing errors only count if they 459 * occur exclusive of a break being 460 * received. 461 */ 462 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 463 } 464 465 /* update input line counters */ 466 icount = &port->icount; 467 if (new_lsr & SERIAL_LSR_BI) { 468 icount->brk++; 469 smp_wmb(); 470 } 471 if (new_lsr & SERIAL_LSR_OE) { 472 icount->overrun++; 473 smp_wmb(); 474 } 475 if (new_lsr & SERIAL_LSR_PE) { 476 icount->parity++; 477 smp_wmb(); 478 } 479 if (new_lsr & SERIAL_LSR_FE) { 480 icount->frame++; 481 smp_wmb(); 482 } 483 } 484 485 /************************************************************************/ 486 /************************************************************************/ 487 /* U S B C A L L B A C K F U N C T I O N S */ 488 /* U S B C A L L B A C K F U N C T I O N S */ 489 /************************************************************************/ 490 /************************************************************************/ 491 492 static void mos7840_control_callback(struct urb *urb) 493 { 494 unsigned char *data; 495 struct moschip_port *mos7840_port; 496 __u8 regval = 0x0; 497 int result = 0; 498 int status = urb->status; 499 500 mos7840_port = urb->context; 501 502 switch (status) { 503 case 0: 504 /* success */ 505 break; 506 case -ECONNRESET: 507 case -ENOENT: 508 case -ESHUTDOWN: 509 /* this urb is terminated, clean up */ 510 dbg("%s - urb shutting down with status: %d", __func__, 511 status); 512 return; 513 default: 514 dbg("%s - nonzero urb status received: %d", __func__, 515 status); 516 goto exit; 517 } 518 519 dbg("%s urb buffer size is %d", __func__, urb->actual_length); 520 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__, 521 mos7840_port->MsrLsr, mos7840_port->port_num); 522 data = urb->transfer_buffer; 523 regval = (__u8) data[0]; 524 dbg("%s data is %x", __func__, regval); 525 if (mos7840_port->MsrLsr == 0) 526 mos7840_handle_new_msr(mos7840_port, regval); 527 else if (mos7840_port->MsrLsr == 1) 528 mos7840_handle_new_lsr(mos7840_port, regval); 529 530 exit: 531 spin_lock(&mos7840_port->pool_lock); 532 if (!mos7840_port->zombie) 533 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 534 spin_unlock(&mos7840_port->pool_lock); 535 if (result) { 536 dev_err(&urb->dev->dev, 537 "%s - Error %d submitting interrupt urb\n", 538 __func__, result); 539 } 540 } 541 542 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 543 __u16 *val) 544 { 545 struct usb_device *dev = mcs->port->serial->dev; 546 struct usb_ctrlrequest *dr = mcs->dr; 547 unsigned char *buffer = mcs->ctrl_buf; 548 int ret; 549 550 dr->bRequestType = MCS_RD_RTYPE; 551 dr->bRequest = MCS_RDREQ; 552 dr->wValue = cpu_to_le16(Wval); /* 0 */ 553 dr->wIndex = cpu_to_le16(reg); 554 dr->wLength = cpu_to_le16(2); 555 556 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 557 (unsigned char *)dr, buffer, 2, 558 mos7840_control_callback, mcs); 559 mcs->control_urb->transfer_buffer_length = 2; 560 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 561 return ret; 562 } 563 564 static void mos7840_set_led_callback(struct urb *urb) 565 { 566 switch (urb->status) { 567 case 0: 568 /* Success */ 569 break; 570 case -ECONNRESET: 571 case -ENOENT: 572 case -ESHUTDOWN: 573 /* This urb is terminated, clean up */ 574 dbg("%s - urb shutting down with status: %d", __func__, 575 urb->status); 576 break; 577 default: 578 dbg("%s - nonzero urb status received: %d", __func__, 579 urb->status); 580 } 581 } 582 583 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 584 __u16 reg) 585 { 586 struct usb_device *dev = mcs->port->serial->dev; 587 struct usb_ctrlrequest *dr = mcs->dr; 588 589 dr->bRequestType = MCS_WR_RTYPE; 590 dr->bRequest = MCS_WRREQ; 591 dr->wValue = cpu_to_le16(wval); 592 dr->wIndex = cpu_to_le16(reg); 593 dr->wLength = cpu_to_le16(0); 594 595 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0), 596 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 597 598 usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 599 } 600 601 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 602 __u16 val) 603 { 604 struct usb_device *dev = port->serial->dev; 605 606 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 607 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 608 } 609 610 static void mos7840_led_off(unsigned long arg) 611 { 612 struct moschip_port *mcs = (struct moschip_port *) arg; 613 614 /* Turn off LED */ 615 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 616 mod_timer(&mcs->led_timer2, 617 jiffies + msecs_to_jiffies(LED_OFF_MS)); 618 } 619 620 static void mos7840_led_flag_off(unsigned long arg) 621 { 622 struct moschip_port *mcs = (struct moschip_port *) arg; 623 624 mcs->led_flag = false; 625 } 626 627 /***************************************************************************** 628 * mos7840_interrupt_callback 629 * this is the callback function for when we have received data on the 630 * interrupt endpoint. 631 *****************************************************************************/ 632 633 static void mos7840_interrupt_callback(struct urb *urb) 634 { 635 int result; 636 int length; 637 struct moschip_port *mos7840_port; 638 struct usb_serial *serial; 639 __u16 Data; 640 unsigned char *data; 641 __u8 sp[5], st; 642 int i, rv = 0; 643 __u16 wval, wreg = 0; 644 int status = urb->status; 645 646 switch (status) { 647 case 0: 648 /* success */ 649 break; 650 case -ECONNRESET: 651 case -ENOENT: 652 case -ESHUTDOWN: 653 /* this urb is terminated, clean up */ 654 dbg("%s - urb shutting down with status: %d", __func__, 655 status); 656 return; 657 default: 658 dbg("%s - nonzero urb status received: %d", __func__, 659 status); 660 goto exit; 661 } 662 663 length = urb->actual_length; 664 data = urb->transfer_buffer; 665 666 serial = urb->context; 667 668 /* Moschip get 5 bytes 669 * Byte 1 IIR Port 1 (port.number is 0) 670 * Byte 2 IIR Port 2 (port.number is 1) 671 * Byte 3 IIR Port 3 (port.number is 2) 672 * Byte 4 IIR Port 4 (port.number is 3) 673 * Byte 5 FIFO status for both */ 674 675 if (length && length > 5) { 676 dbg("%s", "Wrong data !!!"); 677 return; 678 } 679 680 sp[0] = (__u8) data[0]; 681 sp[1] = (__u8) data[1]; 682 sp[2] = (__u8) data[2]; 683 sp[3] = (__u8) data[3]; 684 st = (__u8) data[4]; 685 686 for (i = 0; i < serial->num_ports; i++) { 687 mos7840_port = mos7840_get_port_private(serial->port[i]); 688 wval = 689 (((__u16) serial->port[i]->number - 690 (__u16) (serial->minor)) + 1) << 8; 691 if (mos7840_port->open) { 692 if (sp[i] & 0x01) { 693 dbg("SP%d No Interrupt !!!", i); 694 } else { 695 switch (sp[i] & 0x0f) { 696 case SERIAL_IIR_RLS: 697 dbg("Serial Port %d: Receiver status error or ", i); 698 dbg("address bit detected in 9-bit mode"); 699 mos7840_port->MsrLsr = 1; 700 wreg = LINE_STATUS_REGISTER; 701 break; 702 case SERIAL_IIR_MS: 703 dbg("Serial Port %d: Modem status change", i); 704 mos7840_port->MsrLsr = 0; 705 wreg = MODEM_STATUS_REGISTER; 706 break; 707 } 708 spin_lock(&mos7840_port->pool_lock); 709 if (!mos7840_port->zombie) { 710 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 711 } else { 712 spin_unlock(&mos7840_port->pool_lock); 713 return; 714 } 715 spin_unlock(&mos7840_port->pool_lock); 716 } 717 } 718 } 719 if (!(rv < 0)) 720 /* the completion handler for the control urb will resubmit */ 721 return; 722 exit: 723 result = usb_submit_urb(urb, GFP_ATOMIC); 724 if (result) { 725 dev_err(&urb->dev->dev, 726 "%s - Error %d submitting interrupt urb\n", 727 __func__, result); 728 } 729 } 730 731 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 732 const char *function) 733 { 734 if (!port) { 735 dbg("%s - port == NULL", function); 736 return -1; 737 } 738 if (!port->serial) { 739 dbg("%s - port->serial == NULL", function); 740 return -1; 741 } 742 743 return 0; 744 } 745 746 /* Inline functions to check the sanity of a pointer that is passed to us */ 747 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 748 const char *function) 749 { 750 if (!serial) { 751 dbg("%s - serial == NULL", function); 752 return -1; 753 } 754 if (!serial->type) { 755 dbg("%s - serial->type == NULL!", function); 756 return -1; 757 } 758 759 return 0; 760 } 761 762 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 763 const char *function) 764 { 765 /* if no port was specified, or it fails a paranoia check */ 766 if (!port || 767 mos7840_port_paranoia_check(port, function) || 768 mos7840_serial_paranoia_check(port->serial, function)) { 769 /* then say that we don't have a valid usb_serial thing, 770 * which will end up genrating -ENODEV return values */ 771 return NULL; 772 } 773 774 return port->serial; 775 } 776 777 /***************************************************************************** 778 * mos7840_bulk_in_callback 779 * this is the callback function for when we have received data on the 780 * bulk in endpoint. 781 *****************************************************************************/ 782 783 static void mos7840_bulk_in_callback(struct urb *urb) 784 { 785 int retval; 786 unsigned char *data; 787 struct usb_serial *serial; 788 struct usb_serial_port *port; 789 struct moschip_port *mos7840_port; 790 struct tty_struct *tty; 791 int status = urb->status; 792 793 mos7840_port = urb->context; 794 if (!mos7840_port) { 795 dbg("%s", "NULL mos7840_port pointer"); 796 return; 797 } 798 799 if (status) { 800 dbg("nonzero read bulk status received: %d", status); 801 mos7840_port->read_urb_busy = false; 802 return; 803 } 804 805 port = (struct usb_serial_port *)mos7840_port->port; 806 if (mos7840_port_paranoia_check(port, __func__)) { 807 dbg("%s", "Port Paranoia failed"); 808 mos7840_port->read_urb_busy = false; 809 return; 810 } 811 812 serial = mos7840_get_usb_serial(port, __func__); 813 if (!serial) { 814 dbg("%s", "Bad serial pointer"); 815 mos7840_port->read_urb_busy = false; 816 return; 817 } 818 819 data = urb->transfer_buffer; 820 821 if (urb->actual_length) { 822 tty = tty_port_tty_get(&mos7840_port->port->port); 823 if (tty) { 824 tty_insert_flip_string(tty, data, urb->actual_length); 825 dbg(" %s ", data); 826 tty_flip_buffer_push(tty); 827 tty_kref_put(tty); 828 } 829 mos7840_port->icount.rx += urb->actual_length; 830 smp_wmb(); 831 dbg("mos7840_port->icount.rx is %d:", 832 mos7840_port->icount.rx); 833 } 834 835 if (!mos7840_port->read_urb) { 836 dbg("%s", "URB KILLED !!!"); 837 mos7840_port->read_urb_busy = false; 838 return; 839 } 840 841 /* Turn on LED */ 842 if (mos7840_port->has_led && !mos7840_port->led_flag) { 843 mos7840_port->led_flag = true; 844 mos7840_set_led_async(mos7840_port, 0x0301, 845 MODEM_CONTROL_REGISTER); 846 mod_timer(&mos7840_port->led_timer1, 847 jiffies + msecs_to_jiffies(LED_ON_MS)); 848 } 849 850 mos7840_port->read_urb_busy = true; 851 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 852 853 if (retval) { 854 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval); 855 mos7840_port->read_urb_busy = false; 856 } 857 } 858 859 /***************************************************************************** 860 * mos7840_bulk_out_data_callback 861 * this is the callback function for when we have finished sending 862 * serial data on the bulk out endpoint. 863 *****************************************************************************/ 864 865 static void mos7840_bulk_out_data_callback(struct urb *urb) 866 { 867 struct moschip_port *mos7840_port; 868 struct tty_struct *tty; 869 int status = urb->status; 870 int i; 871 872 mos7840_port = urb->context; 873 spin_lock(&mos7840_port->pool_lock); 874 for (i = 0; i < NUM_URBS; i++) { 875 if (urb == mos7840_port->write_urb_pool[i]) { 876 mos7840_port->busy[i] = 0; 877 break; 878 } 879 } 880 spin_unlock(&mos7840_port->pool_lock); 881 882 if (status) { 883 dbg("nonzero write bulk status received:%d", status); 884 return; 885 } 886 887 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { 888 dbg("%s", "Port Paranoia failed"); 889 return; 890 } 891 892 tty = tty_port_tty_get(&mos7840_port->port->port); 893 if (tty && mos7840_port->open) 894 tty_wakeup(tty); 895 tty_kref_put(tty); 896 897 } 898 899 /************************************************************************/ 900 /* 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 */ 901 /************************************************************************/ 902 #ifdef MCSSerialProbe 903 static int mos7840_serial_probe(struct usb_serial *serial, 904 const struct usb_device_id *id) 905 { 906 907 /*need to implement the mode_reg reading and updating\ 908 structures usb_serial_ device_type\ 909 (i.e num_ports, num_bulkin,bulkout etc) */ 910 /* Also we can update the changes attach */ 911 return 1; 912 } 913 #endif 914 915 /***************************************************************************** 916 * mos7840_open 917 * this function is called by the tty driver when a port is opened 918 * If successful, we return 0 919 * Otherwise we return a negative error number. 920 *****************************************************************************/ 921 922 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 923 { 924 int response; 925 int j; 926 struct usb_serial *serial; 927 struct urb *urb; 928 __u16 Data; 929 int status; 930 struct moschip_port *mos7840_port; 931 struct moschip_port *port0; 932 933 if (mos7840_port_paranoia_check(port, __func__)) { 934 dbg("%s", "Port Paranoia failed"); 935 return -ENODEV; 936 } 937 938 serial = port->serial; 939 940 if (mos7840_serial_paranoia_check(serial, __func__)) { 941 dbg("%s", "Serial Paranoia failed"); 942 return -ENODEV; 943 } 944 945 mos7840_port = mos7840_get_port_private(port); 946 port0 = mos7840_get_port_private(serial->port[0]); 947 948 if (mos7840_port == NULL || port0 == NULL) 949 return -ENODEV; 950 951 usb_clear_halt(serial->dev, port->write_urb->pipe); 952 usb_clear_halt(serial->dev, port->read_urb->pipe); 953 port0->open_ports++; 954 955 /* Initialising the write urb pool */ 956 for (j = 0; j < NUM_URBS; ++j) { 957 urb = usb_alloc_urb(0, GFP_KERNEL); 958 mos7840_port->write_urb_pool[j] = urb; 959 960 if (urb == NULL) { 961 dev_err(&port->dev, "No more urbs???\n"); 962 continue; 963 } 964 965 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 966 GFP_KERNEL); 967 if (!urb->transfer_buffer) { 968 usb_free_urb(urb); 969 mos7840_port->write_urb_pool[j] = NULL; 970 dev_err(&port->dev, 971 "%s-out of memory for urb buffers.\n", 972 __func__); 973 continue; 974 } 975 } 976 977 /***************************************************************************** 978 * Initialize MCS7840 -- Write Init values to corresponding Registers 979 * 980 * Register Index 981 * 1 : IER 982 * 2 : FCR 983 * 3 : LCR 984 * 4 : MCR 985 * 986 * 0x08 : SP1/2 Control Reg 987 *****************************************************************************/ 988 989 /* NEED to check the following Block */ 990 991 Data = 0x0; 992 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 993 if (status < 0) { 994 dbg("Reading Spreg failed"); 995 return -1; 996 } 997 Data |= 0x80; 998 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 999 if (status < 0) { 1000 dbg("writing Spreg failed"); 1001 return -1; 1002 } 1003 1004 Data &= ~0x80; 1005 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1006 if (status < 0) { 1007 dbg("writing Spreg failed"); 1008 return -1; 1009 } 1010 /* End of block to be checked */ 1011 1012 Data = 0x0; 1013 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1014 &Data); 1015 if (status < 0) { 1016 dbg("Reading Controlreg failed"); 1017 return -1; 1018 } 1019 Data |= 0x08; /* Driver done bit */ 1020 Data |= 0x20; /* rx_disable */ 1021 status = mos7840_set_reg_sync(port, 1022 mos7840_port->ControlRegOffset, Data); 1023 if (status < 0) { 1024 dbg("writing Controlreg failed"); 1025 return -1; 1026 } 1027 /* do register settings here */ 1028 /* Set all regs to the device default values. */ 1029 /*********************************** 1030 * First Disable all interrupts. 1031 ***********************************/ 1032 Data = 0x00; 1033 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1034 if (status < 0) { 1035 dbg("disabling interrupts failed"); 1036 return -1; 1037 } 1038 /* Set FIFO_CONTROL_REGISTER to the default value */ 1039 Data = 0x00; 1040 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1041 if (status < 0) { 1042 dbg("Writing FIFO_CONTROL_REGISTER failed"); 1043 return -1; 1044 } 1045 1046 Data = 0xcf; 1047 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1048 if (status < 0) { 1049 dbg("Writing FIFO_CONTROL_REGISTER failed"); 1050 return -1; 1051 } 1052 1053 Data = 0x03; 1054 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1055 mos7840_port->shadowLCR = Data; 1056 1057 Data = 0x0b; 1058 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1059 mos7840_port->shadowMCR = Data; 1060 1061 Data = 0x00; 1062 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1063 mos7840_port->shadowLCR = Data; 1064 1065 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1066 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1067 1068 Data = 0x0c; 1069 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1070 1071 Data = 0x0; 1072 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1073 1074 Data = 0x00; 1075 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1076 1077 Data = Data & ~SERIAL_LCR_DLAB; 1078 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1079 mos7840_port->shadowLCR = Data; 1080 1081 /* clearing Bulkin and Bulkout Fifo */ 1082 Data = 0x0; 1083 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1084 1085 Data = Data | 0x0c; 1086 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1087 1088 Data = Data & ~0x0c; 1089 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1090 /* Finally enable all interrupts */ 1091 Data = 0x0c; 1092 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1093 1094 /* clearing rx_disable */ 1095 Data = 0x0; 1096 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1097 &Data); 1098 Data = Data & ~0x20; 1099 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1100 Data); 1101 1102 /* rx_negate */ 1103 Data = 0x0; 1104 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1105 &Data); 1106 Data = Data | 0x10; 1107 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1108 Data); 1109 1110 /* Check to see if we've set up our endpoint info yet * 1111 * (can't set it up in mos7840_startup as the structures * 1112 * were not set up at that time.) */ 1113 if (port0->open_ports == 1) { 1114 if (serial->port[0]->interrupt_in_buffer == NULL) { 1115 /* set up interrupt urb */ 1116 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1117 serial->dev, 1118 usb_rcvintpipe(serial->dev, 1119 serial->port[0]->interrupt_in_endpointAddress), 1120 serial->port[0]->interrupt_in_buffer, 1121 serial->port[0]->interrupt_in_urb-> 1122 transfer_buffer_length, 1123 mos7840_interrupt_callback, 1124 serial, 1125 serial->port[0]->interrupt_in_urb->interval); 1126 1127 /* start interrupt read for mos7840 * 1128 * will continue as long as mos7840 is connected */ 1129 1130 response = 1131 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1132 GFP_KERNEL); 1133 if (response) { 1134 dev_err(&port->dev, "%s - Error %d submitting " 1135 "interrupt urb\n", __func__, response); 1136 } 1137 1138 } 1139 1140 } 1141 1142 /* see if we've set up our endpoint info yet * 1143 * (can't set it up in mos7840_startup as the * 1144 * structures were not set up at that time.) */ 1145 1146 dbg("port number is %d", port->number); 1147 dbg("serial number is %d", port->serial->minor); 1148 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress); 1149 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress); 1150 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress); 1151 dbg("port's number in the device is %d", mos7840_port->port_num); 1152 mos7840_port->read_urb = port->read_urb; 1153 1154 /* set up our bulk in urb */ 1155 if ((serial->num_ports == 2) 1156 && ((((__u16)port->number - 1157 (__u16)(port->serial->minor)) % 2) != 0)) { 1158 usb_fill_bulk_urb(mos7840_port->read_urb, 1159 serial->dev, 1160 usb_rcvbulkpipe(serial->dev, 1161 (port->bulk_in_endpointAddress) + 2), 1162 port->bulk_in_buffer, 1163 mos7840_port->read_urb->transfer_buffer_length, 1164 mos7840_bulk_in_callback, mos7840_port); 1165 } else { 1166 usb_fill_bulk_urb(mos7840_port->read_urb, 1167 serial->dev, 1168 usb_rcvbulkpipe(serial->dev, 1169 port->bulk_in_endpointAddress), 1170 port->bulk_in_buffer, 1171 mos7840_port->read_urb->transfer_buffer_length, 1172 mos7840_bulk_in_callback, mos7840_port); 1173 } 1174 1175 dbg("mos7840_open: bulkin endpoint is %d", 1176 port->bulk_in_endpointAddress); 1177 mos7840_port->read_urb_busy = true; 1178 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1179 if (response) { 1180 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1181 __func__, response); 1182 mos7840_port->read_urb_busy = false; 1183 } 1184 1185 /* initialize our wait queues */ 1186 init_waitqueue_head(&mos7840_port->wait_chase); 1187 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1188 1189 /* initialize our icount structure */ 1190 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1191 1192 /* initialize our port settings */ 1193 /* Must set to enable ints! */ 1194 mos7840_port->shadowMCR = MCR_MASTER_IE; 1195 /* send a open port command */ 1196 mos7840_port->open = 1; 1197 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1198 mos7840_port->icount.tx = 0; 1199 mos7840_port->icount.rx = 0; 1200 1201 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p", 1202 serial, mos7840_port, port); 1203 1204 return 0; 1205 } 1206 1207 /***************************************************************************** 1208 * mos7840_chars_in_buffer 1209 * this function is called by the tty driver when it wants to know how many 1210 * bytes of data we currently have outstanding in the port (data that has 1211 * been written, but hasn't made it out the port yet) 1212 * If successful, we return the number of bytes left to be written in the 1213 * system, 1214 * Otherwise we return zero. 1215 *****************************************************************************/ 1216 1217 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1218 { 1219 struct usb_serial_port *port = tty->driver_data; 1220 int i; 1221 int chars = 0; 1222 unsigned long flags; 1223 struct moschip_port *mos7840_port; 1224 1225 if (mos7840_port_paranoia_check(port, __func__)) { 1226 dbg("%s", "Invalid port"); 1227 return 0; 1228 } 1229 1230 mos7840_port = mos7840_get_port_private(port); 1231 if (mos7840_port == NULL) 1232 return 0; 1233 1234 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1235 for (i = 0; i < NUM_URBS; ++i) 1236 if (mos7840_port->busy[i]) 1237 chars += URB_TRANSFER_BUFFER_SIZE; 1238 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1239 dbg("%s - returns %d", __func__, chars); 1240 return chars; 1241 1242 } 1243 1244 /***************************************************************************** 1245 * mos7840_close 1246 * this function is called by the tty driver when a port is closed 1247 *****************************************************************************/ 1248 1249 static void mos7840_close(struct usb_serial_port *port) 1250 { 1251 struct usb_serial *serial; 1252 struct moschip_port *mos7840_port; 1253 struct moschip_port *port0; 1254 int j; 1255 __u16 Data; 1256 1257 if (mos7840_port_paranoia_check(port, __func__)) { 1258 dbg("%s", "Port Paranoia failed"); 1259 return; 1260 } 1261 1262 serial = mos7840_get_usb_serial(port, __func__); 1263 if (!serial) { 1264 dbg("%s", "Serial Paranoia failed"); 1265 return; 1266 } 1267 1268 mos7840_port = mos7840_get_port_private(port); 1269 port0 = mos7840_get_port_private(serial->port[0]); 1270 1271 if (mos7840_port == NULL || port0 == NULL) 1272 return; 1273 1274 for (j = 0; j < NUM_URBS; ++j) 1275 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1276 1277 /* Freeing Write URBs */ 1278 for (j = 0; j < NUM_URBS; ++j) { 1279 if (mos7840_port->write_urb_pool[j]) { 1280 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1281 kfree(mos7840_port->write_urb_pool[j]-> 1282 transfer_buffer); 1283 1284 usb_free_urb(mos7840_port->write_urb_pool[j]); 1285 } 1286 } 1287 1288 /* While closing port, shutdown all bulk read, write * 1289 * and interrupt read if they exists */ 1290 if (serial->dev) { 1291 if (mos7840_port->write_urb) { 1292 dbg("%s", "Shutdown bulk write"); 1293 usb_kill_urb(mos7840_port->write_urb); 1294 } 1295 if (mos7840_port->read_urb) { 1296 dbg("%s", "Shutdown bulk read"); 1297 usb_kill_urb(mos7840_port->read_urb); 1298 mos7840_port->read_urb_busy = false; 1299 } 1300 if ((&mos7840_port->control_urb)) { 1301 dbg("%s", "Shutdown control read"); 1302 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1303 } 1304 } 1305 /* if(mos7840_port->ctrl_buf != NULL) */ 1306 /* kfree(mos7840_port->ctrl_buf); */ 1307 port0->open_ports--; 1308 dbg("mos7840_num_open_ports in close%d:in port%d", 1309 port0->open_ports, port->number); 1310 if (port0->open_ports == 0) { 1311 if (serial->port[0]->interrupt_in_urb) { 1312 dbg("%s", "Shutdown interrupt_in_urb"); 1313 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1314 } 1315 } 1316 1317 if (mos7840_port->write_urb) { 1318 /* if this urb had a transfer buffer already (old tx) free it */ 1319 if (mos7840_port->write_urb->transfer_buffer != NULL) 1320 kfree(mos7840_port->write_urb->transfer_buffer); 1321 usb_free_urb(mos7840_port->write_urb); 1322 } 1323 1324 Data = 0x0; 1325 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1326 1327 Data = 0x00; 1328 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1329 1330 mos7840_port->open = 0; 1331 } 1332 1333 /************************************************************************ 1334 * 1335 * mos7840_block_until_chase_response 1336 * 1337 * This function will block the close until one of the following: 1338 * 1. Response to our Chase comes from mos7840 1339 * 2. A timeout of 10 seconds without activity has expired 1340 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1341 * 1342 ************************************************************************/ 1343 1344 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1345 struct moschip_port *mos7840_port) 1346 { 1347 int timeout = 1 * HZ; 1348 int wait = 10; 1349 int count; 1350 1351 while (1) { 1352 count = mos7840_chars_in_buffer(tty); 1353 1354 /* Check for Buffer status */ 1355 if (count <= 0) 1356 return; 1357 1358 /* Block the thread for a while */ 1359 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1360 timeout); 1361 /* No activity.. count down section */ 1362 wait--; 1363 if (wait == 0) { 1364 dbg("%s - TIMEOUT", __func__); 1365 return; 1366 } else { 1367 /* Reset timeout value back to seconds */ 1368 wait = 10; 1369 } 1370 } 1371 1372 } 1373 1374 /***************************************************************************** 1375 * mos7840_break 1376 * this function sends a break to the port 1377 *****************************************************************************/ 1378 static void mos7840_break(struct tty_struct *tty, int break_state) 1379 { 1380 struct usb_serial_port *port = tty->driver_data; 1381 unsigned char data; 1382 struct usb_serial *serial; 1383 struct moschip_port *mos7840_port; 1384 1385 if (mos7840_port_paranoia_check(port, __func__)) { 1386 dbg("%s", "Port Paranoia failed"); 1387 return; 1388 } 1389 1390 serial = mos7840_get_usb_serial(port, __func__); 1391 if (!serial) { 1392 dbg("%s", "Serial Paranoia failed"); 1393 return; 1394 } 1395 1396 mos7840_port = mos7840_get_port_private(port); 1397 1398 if (mos7840_port == NULL) 1399 return; 1400 1401 if (serial->dev) 1402 /* flush and block until tx is empty */ 1403 mos7840_block_until_chase_response(tty, mos7840_port); 1404 1405 if (break_state == -1) 1406 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1407 else 1408 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1409 1410 /* FIXME: no locking on shadowLCR anywhere in driver */ 1411 mos7840_port->shadowLCR = data; 1412 dbg("mcs7840_break mos7840_port->shadowLCR is %x", 1413 mos7840_port->shadowLCR); 1414 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1415 mos7840_port->shadowLCR); 1416 } 1417 1418 /***************************************************************************** 1419 * mos7840_write_room 1420 * this function is called by the tty driver when it wants to know how many 1421 * bytes of data we can accept for a specific port. 1422 * If successful, we return the amount of room that we have for this port 1423 * Otherwise we return a negative error number. 1424 *****************************************************************************/ 1425 1426 static int mos7840_write_room(struct tty_struct *tty) 1427 { 1428 struct usb_serial_port *port = tty->driver_data; 1429 int i; 1430 int room = 0; 1431 unsigned long flags; 1432 struct moschip_port *mos7840_port; 1433 1434 if (mos7840_port_paranoia_check(port, __func__)) { 1435 dbg("%s", "Invalid port"); 1436 dbg("%s", " mos7840_write_room:leaving ..........."); 1437 return -1; 1438 } 1439 1440 mos7840_port = mos7840_get_port_private(port); 1441 if (mos7840_port == NULL) { 1442 dbg("%s", "mos7840_break:leaving ..........."); 1443 return -1; 1444 } 1445 1446 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1447 for (i = 0; i < NUM_URBS; ++i) { 1448 if (!mos7840_port->busy[i]) 1449 room += URB_TRANSFER_BUFFER_SIZE; 1450 } 1451 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1452 1453 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1454 dbg("%s - returns %d", __func__, room); 1455 return room; 1456 1457 } 1458 1459 /***************************************************************************** 1460 * mos7840_write 1461 * this function is called by the tty driver when data should be written to 1462 * the port. 1463 * If successful, we return the number of bytes written, otherwise we 1464 * return a negative error number. 1465 *****************************************************************************/ 1466 1467 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1468 const unsigned char *data, int count) 1469 { 1470 int status; 1471 int i; 1472 int bytes_sent = 0; 1473 int transfer_size; 1474 unsigned long flags; 1475 1476 struct moschip_port *mos7840_port; 1477 struct usb_serial *serial; 1478 struct urb *urb; 1479 /* __u16 Data; */ 1480 const unsigned char *current_position = data; 1481 unsigned char *data1; 1482 1483 #ifdef NOTMOS7840 1484 Data = 0x00; 1485 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1486 mos7840_port->shadowLCR = Data; 1487 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data); 1488 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1489 mos7840_port->shadowLCR); 1490 1491 /* Data = 0x03; */ 1492 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1493 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1494 1495 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1496 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1497 1498 /* Data = 0x0c; */ 1499 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1500 Data = 0x00; 1501 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1502 dbg("mos7840_write:DLL value is %x", Data); 1503 1504 Data = 0x0; 1505 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1506 dbg("mos7840_write:DLM value is %x", Data); 1507 1508 Data = Data & ~SERIAL_LCR_DLAB; 1509 dbg("mos7840_write: mos7840_port->shadowLCR is %x", 1510 mos7840_port->shadowLCR); 1511 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1512 #endif 1513 1514 if (mos7840_port_paranoia_check(port, __func__)) { 1515 dbg("%s", "Port Paranoia failed"); 1516 return -1; 1517 } 1518 1519 serial = port->serial; 1520 if (mos7840_serial_paranoia_check(serial, __func__)) { 1521 dbg("%s", "Serial Paranoia failed"); 1522 return -1; 1523 } 1524 1525 mos7840_port = mos7840_get_port_private(port); 1526 if (mos7840_port == NULL) { 1527 dbg("%s", "mos7840_port is NULL"); 1528 return -1; 1529 } 1530 1531 /* try to find a free urb in the list */ 1532 urb = NULL; 1533 1534 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1535 for (i = 0; i < NUM_URBS; ++i) { 1536 if (!mos7840_port->busy[i]) { 1537 mos7840_port->busy[i] = 1; 1538 urb = mos7840_port->write_urb_pool[i]; 1539 dbg("URB:%d", i); 1540 break; 1541 } 1542 } 1543 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1544 1545 if (urb == NULL) { 1546 dbg("%s - no more free urbs", __func__); 1547 goto exit; 1548 } 1549 1550 if (urb->transfer_buffer == NULL) { 1551 urb->transfer_buffer = 1552 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1553 1554 if (urb->transfer_buffer == NULL) { 1555 dev_err_console(port, "%s no more kernel memory...\n", 1556 __func__); 1557 goto exit; 1558 } 1559 } 1560 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1561 1562 memcpy(urb->transfer_buffer, current_position, transfer_size); 1563 1564 /* fill urb with data and submit */ 1565 if ((serial->num_ports == 2) 1566 && ((((__u16)port->number - 1567 (__u16)(port->serial->minor)) % 2) != 0)) { 1568 usb_fill_bulk_urb(urb, 1569 serial->dev, 1570 usb_sndbulkpipe(serial->dev, 1571 (port->bulk_out_endpointAddress) + 2), 1572 urb->transfer_buffer, 1573 transfer_size, 1574 mos7840_bulk_out_data_callback, mos7840_port); 1575 } else { 1576 usb_fill_bulk_urb(urb, 1577 serial->dev, 1578 usb_sndbulkpipe(serial->dev, 1579 port->bulk_out_endpointAddress), 1580 urb->transfer_buffer, 1581 transfer_size, 1582 mos7840_bulk_out_data_callback, mos7840_port); 1583 } 1584 1585 data1 = urb->transfer_buffer; 1586 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress); 1587 1588 /* Turn on LED */ 1589 if (mos7840_port->has_led && !mos7840_port->led_flag) { 1590 mos7840_port->led_flag = true; 1591 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301); 1592 mod_timer(&mos7840_port->led_timer1, 1593 jiffies + msecs_to_jiffies(LED_ON_MS)); 1594 } 1595 1596 /* send it down the pipe */ 1597 status = usb_submit_urb(urb, GFP_ATOMIC); 1598 1599 if (status) { 1600 mos7840_port->busy[i] = 0; 1601 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1602 "with status = %d\n", __func__, status); 1603 bytes_sent = status; 1604 goto exit; 1605 } 1606 bytes_sent = transfer_size; 1607 mos7840_port->icount.tx += transfer_size; 1608 smp_wmb(); 1609 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx); 1610 exit: 1611 return bytes_sent; 1612 1613 } 1614 1615 /***************************************************************************** 1616 * mos7840_throttle 1617 * this function is called by the tty driver when it wants to stop the data 1618 * being read from the port. 1619 *****************************************************************************/ 1620 1621 static void mos7840_throttle(struct tty_struct *tty) 1622 { 1623 struct usb_serial_port *port = tty->driver_data; 1624 struct moschip_port *mos7840_port; 1625 int status; 1626 1627 if (mos7840_port_paranoia_check(port, __func__)) { 1628 dbg("%s", "Invalid port"); 1629 return; 1630 } 1631 1632 dbg("- port %d", port->number); 1633 1634 mos7840_port = mos7840_get_port_private(port); 1635 1636 if (mos7840_port == NULL) 1637 return; 1638 1639 if (!mos7840_port->open) { 1640 dbg("%s", "port not opened"); 1641 return; 1642 } 1643 1644 /* if we are implementing XON/XOFF, send the stop character */ 1645 if (I_IXOFF(tty)) { 1646 unsigned char stop_char = STOP_CHAR(tty); 1647 status = mos7840_write(tty, port, &stop_char, 1); 1648 if (status <= 0) 1649 return; 1650 } 1651 /* if we are implementing RTS/CTS, toggle that line */ 1652 if (tty->termios->c_cflag & CRTSCTS) { 1653 mos7840_port->shadowMCR &= ~MCR_RTS; 1654 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1655 mos7840_port->shadowMCR); 1656 if (status < 0) 1657 return; 1658 } 1659 } 1660 1661 /***************************************************************************** 1662 * mos7840_unthrottle 1663 * this function is called by the tty driver when it wants to resume 1664 * the data being read from the port (called after mos7840_throttle is 1665 * called) 1666 *****************************************************************************/ 1667 static void mos7840_unthrottle(struct tty_struct *tty) 1668 { 1669 struct usb_serial_port *port = tty->driver_data; 1670 int status; 1671 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1672 1673 if (mos7840_port_paranoia_check(port, __func__)) { 1674 dbg("%s", "Invalid port"); 1675 return; 1676 } 1677 1678 if (mos7840_port == NULL) 1679 return; 1680 1681 if (!mos7840_port->open) { 1682 dbg("%s - port not opened", __func__); 1683 return; 1684 } 1685 1686 /* if we are implementing XON/XOFF, send the start character */ 1687 if (I_IXOFF(tty)) { 1688 unsigned char start_char = START_CHAR(tty); 1689 status = mos7840_write(tty, port, &start_char, 1); 1690 if (status <= 0) 1691 return; 1692 } 1693 1694 /* if we are implementing RTS/CTS, toggle that line */ 1695 if (tty->termios->c_cflag & CRTSCTS) { 1696 mos7840_port->shadowMCR |= MCR_RTS; 1697 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1698 mos7840_port->shadowMCR); 1699 if (status < 0) 1700 return; 1701 } 1702 } 1703 1704 static int mos7840_tiocmget(struct tty_struct *tty) 1705 { 1706 struct usb_serial_port *port = tty->driver_data; 1707 struct moschip_port *mos7840_port; 1708 unsigned int result; 1709 __u16 msr; 1710 __u16 mcr; 1711 int status; 1712 mos7840_port = mos7840_get_port_private(port); 1713 1714 if (mos7840_port == NULL) 1715 return -ENODEV; 1716 1717 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1718 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1719 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1720 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1721 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1722 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1723 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1724 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1725 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1726 1727 dbg("%s - 0x%04X", __func__, result); 1728 1729 return result; 1730 } 1731 1732 static int mos7840_tiocmset(struct tty_struct *tty, 1733 unsigned int set, unsigned int clear) 1734 { 1735 struct usb_serial_port *port = tty->driver_data; 1736 struct moschip_port *mos7840_port; 1737 unsigned int mcr; 1738 int status; 1739 1740 mos7840_port = mos7840_get_port_private(port); 1741 1742 if (mos7840_port == NULL) 1743 return -ENODEV; 1744 1745 /* FIXME: What locks the port registers ? */ 1746 mcr = mos7840_port->shadowMCR; 1747 if (clear & TIOCM_RTS) 1748 mcr &= ~MCR_RTS; 1749 if (clear & TIOCM_DTR) 1750 mcr &= ~MCR_DTR; 1751 if (clear & TIOCM_LOOP) 1752 mcr &= ~MCR_LOOPBACK; 1753 1754 if (set & TIOCM_RTS) 1755 mcr |= MCR_RTS; 1756 if (set & TIOCM_DTR) 1757 mcr |= MCR_DTR; 1758 if (set & TIOCM_LOOP) 1759 mcr |= MCR_LOOPBACK; 1760 1761 mos7840_port->shadowMCR = mcr; 1762 1763 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1764 if (status < 0) { 1765 dbg("setting MODEM_CONTROL_REGISTER Failed"); 1766 return status; 1767 } 1768 1769 return 0; 1770 } 1771 1772 /***************************************************************************** 1773 * mos7840_calc_baud_rate_divisor 1774 * this function calculates the proper baud rate divisor for the specified 1775 * baud rate. 1776 *****************************************************************************/ 1777 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, 1778 __u16 *clk_sel_val) 1779 { 1780 dbg("%s - %d", __func__, baudRate); 1781 1782 if (baudRate <= 115200) { 1783 *divisor = 115200 / baudRate; 1784 *clk_sel_val = 0x0; 1785 } 1786 if ((baudRate > 115200) && (baudRate <= 230400)) { 1787 *divisor = 230400 / baudRate; 1788 *clk_sel_val = 0x10; 1789 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1790 *divisor = 403200 / baudRate; 1791 *clk_sel_val = 0x20; 1792 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1793 *divisor = 460800 / baudRate; 1794 *clk_sel_val = 0x30; 1795 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1796 *divisor = 806400 / baudRate; 1797 *clk_sel_val = 0x40; 1798 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1799 *divisor = 921600 / baudRate; 1800 *clk_sel_val = 0x50; 1801 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1802 *divisor = 1572864 / baudRate; 1803 *clk_sel_val = 0x60; 1804 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1805 *divisor = 3145728 / baudRate; 1806 *clk_sel_val = 0x70; 1807 } 1808 return 0; 1809 1810 #ifdef NOTMCS7840 1811 1812 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1813 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1814 *divisor = mos7840_divisor_table[i].Divisor; 1815 return 0; 1816 } 1817 } 1818 1819 /* After trying for all the standard baud rates * 1820 * Try calculating the divisor for this baud rate */ 1821 1822 if (baudrate > 75 && baudrate < 230400) { 1823 /* get the divisor */ 1824 custom = (__u16) (230400L / baudrate); 1825 1826 /* Check for round off */ 1827 round1 = (__u16) (2304000L / baudrate); 1828 round = (__u16) (round1 - (custom * 10)); 1829 if (round > 4) 1830 custom++; 1831 *divisor = custom; 1832 1833 dbg(" Baud %d = %d", baudrate, custom); 1834 return 0; 1835 } 1836 1837 dbg("%s", " Baud calculation Failed..."); 1838 return -1; 1839 #endif 1840 } 1841 1842 /***************************************************************************** 1843 * mos7840_send_cmd_write_baud_rate 1844 * this function sends the proper command to change the baud rate of the 1845 * specified port. 1846 *****************************************************************************/ 1847 1848 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1849 int baudRate) 1850 { 1851 int divisor = 0; 1852 int status; 1853 __u16 Data; 1854 unsigned char number; 1855 __u16 clk_sel_val; 1856 struct usb_serial_port *port; 1857 1858 if (mos7840_port == NULL) 1859 return -1; 1860 1861 port = (struct usb_serial_port *)mos7840_port->port; 1862 if (mos7840_port_paranoia_check(port, __func__)) { 1863 dbg("%s", "Invalid port"); 1864 return -1; 1865 } 1866 1867 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1868 dbg("%s", "Invalid Serial"); 1869 return -1; 1870 } 1871 1872 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1873 1874 dbg("%s - port = %d, baud = %d", __func__, 1875 mos7840_port->port->number, baudRate); 1876 /* reset clk_uart_sel in spregOffset */ 1877 if (baudRate > 115200) { 1878 #ifdef HW_flow_control 1879 /* NOTE: need to see the pther register to modify */ 1880 /* setting h/w flow control bit to 1 */ 1881 Data = 0x2b; 1882 mos7840_port->shadowMCR = Data; 1883 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1884 Data); 1885 if (status < 0) { 1886 dbg("Writing spreg failed in set_serial_baud"); 1887 return -1; 1888 } 1889 #endif 1890 1891 } else { 1892 #ifdef HW_flow_control 1893 /* setting h/w flow control bit to 0 */ 1894 Data = 0xb; 1895 mos7840_port->shadowMCR = Data; 1896 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1897 Data); 1898 if (status < 0) { 1899 dbg("Writing spreg failed in set_serial_baud"); 1900 return -1; 1901 } 1902 #endif 1903 1904 } 1905 1906 if (1) { /* baudRate <= 115200) */ 1907 clk_sel_val = 0x0; 1908 Data = 0x0; 1909 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, 1910 &clk_sel_val); 1911 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1912 &Data); 1913 if (status < 0) { 1914 dbg("reading spreg failed in set_serial_baud"); 1915 return -1; 1916 } 1917 Data = (Data & 0x8f) | clk_sel_val; 1918 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1919 Data); 1920 if (status < 0) { 1921 dbg("Writing spreg failed in set_serial_baud"); 1922 return -1; 1923 } 1924 /* Calculate the Divisor */ 1925 1926 if (status) { 1927 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1928 return status; 1929 } 1930 /* Enable access to divisor latch */ 1931 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1932 mos7840_port->shadowLCR = Data; 1933 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1934 1935 /* Write the divisor */ 1936 Data = (unsigned char)(divisor & 0xff); 1937 dbg("set_serial_baud Value to write DLL is %x", Data); 1938 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1939 1940 Data = (unsigned char)((divisor & 0xff00) >> 8); 1941 dbg("set_serial_baud Value to write DLM is %x", Data); 1942 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1943 1944 /* Disable access to divisor latch */ 1945 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1946 mos7840_port->shadowLCR = Data; 1947 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1948 1949 } 1950 return status; 1951 } 1952 1953 /***************************************************************************** 1954 * mos7840_change_port_settings 1955 * This routine is called to set the UART on the device to match 1956 * the specified new settings. 1957 *****************************************************************************/ 1958 1959 static void mos7840_change_port_settings(struct tty_struct *tty, 1960 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1961 { 1962 int baud; 1963 unsigned cflag; 1964 unsigned iflag; 1965 __u8 lData; 1966 __u8 lParity; 1967 __u8 lStop; 1968 int status; 1969 __u16 Data; 1970 struct usb_serial_port *port; 1971 struct usb_serial *serial; 1972 1973 if (mos7840_port == NULL) 1974 return; 1975 1976 port = (struct usb_serial_port *)mos7840_port->port; 1977 1978 if (mos7840_port_paranoia_check(port, __func__)) { 1979 dbg("%s", "Invalid port"); 1980 return; 1981 } 1982 1983 if (mos7840_serial_paranoia_check(port->serial, __func__)) { 1984 dbg("%s", "Invalid Serial"); 1985 return; 1986 } 1987 1988 serial = port->serial; 1989 1990 dbg("%s - port %d", __func__, mos7840_port->port->number); 1991 1992 if (!mos7840_port->open) { 1993 dbg("%s - port not opened", __func__); 1994 return; 1995 } 1996 1997 lData = LCR_BITS_8; 1998 lStop = LCR_STOP_1; 1999 lParity = LCR_PAR_NONE; 2000 2001 cflag = tty->termios->c_cflag; 2002 iflag = tty->termios->c_iflag; 2003 2004 /* Change the number of bits */ 2005 if (cflag & CSIZE) { 2006 switch (cflag & CSIZE) { 2007 case CS5: 2008 lData = LCR_BITS_5; 2009 break; 2010 2011 case CS6: 2012 lData = LCR_BITS_6; 2013 break; 2014 2015 case CS7: 2016 lData = LCR_BITS_7; 2017 break; 2018 default: 2019 case CS8: 2020 lData = LCR_BITS_8; 2021 break; 2022 } 2023 } 2024 /* Change the Parity bit */ 2025 if (cflag & PARENB) { 2026 if (cflag & PARODD) { 2027 lParity = LCR_PAR_ODD; 2028 dbg("%s - parity = odd", __func__); 2029 } else { 2030 lParity = LCR_PAR_EVEN; 2031 dbg("%s - parity = even", __func__); 2032 } 2033 2034 } else { 2035 dbg("%s - parity = none", __func__); 2036 } 2037 2038 if (cflag & CMSPAR) 2039 lParity = lParity | 0x20; 2040 2041 /* Change the Stop bit */ 2042 if (cflag & CSTOPB) { 2043 lStop = LCR_STOP_2; 2044 dbg("%s - stop bits = 2", __func__); 2045 } else { 2046 lStop = LCR_STOP_1; 2047 dbg("%s - stop bits = 1", __func__); 2048 } 2049 2050 /* Update the LCR with the correct value */ 2051 mos7840_port->shadowLCR &= 2052 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 2053 mos7840_port->shadowLCR |= (lData | lParity | lStop); 2054 2055 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x", 2056 mos7840_port->shadowLCR); 2057 /* Disable Interrupts */ 2058 Data = 0x00; 2059 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2060 2061 Data = 0x00; 2062 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2063 2064 Data = 0xcf; 2065 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 2066 2067 /* Send the updated LCR value to the mos7840 */ 2068 Data = mos7840_port->shadowLCR; 2069 2070 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 2071 2072 Data = 0x00b; 2073 mos7840_port->shadowMCR = Data; 2074 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2075 Data = 0x00b; 2076 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2077 2078 /* set up the MCR register and send it to the mos7840 */ 2079 2080 mos7840_port->shadowMCR = MCR_MASTER_IE; 2081 if (cflag & CBAUD) 2082 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2083 2084 if (cflag & CRTSCTS) 2085 mos7840_port->shadowMCR |= (MCR_XON_ANY); 2086 else 2087 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2088 2089 Data = mos7840_port->shadowMCR; 2090 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2091 2092 /* Determine divisor based on baud rate */ 2093 baud = tty_get_baud_rate(tty); 2094 2095 if (!baud) { 2096 /* pick a default, any default... */ 2097 dbg("%s", "Picked default baud..."); 2098 baud = 9600; 2099 } 2100 2101 dbg("%s - baud rate = %d", __func__, baud); 2102 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2103 2104 /* Enable Interrupts */ 2105 Data = 0x0c; 2106 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2107 2108 if (mos7840_port->read_urb_busy == false) { 2109 mos7840_port->read_urb_busy = true; 2110 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2111 if (status) { 2112 dbg("usb_submit_urb(read bulk) failed, status = %d", 2113 status); 2114 mos7840_port->read_urb_busy = false; 2115 } 2116 } 2117 wake_up(&mos7840_port->delta_msr_wait); 2118 mos7840_port->delta_msr_cond = 1; 2119 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x", 2120 mos7840_port->shadowLCR); 2121 } 2122 2123 /***************************************************************************** 2124 * mos7840_set_termios 2125 * this function is called by the tty driver when it wants to change 2126 * the termios structure 2127 *****************************************************************************/ 2128 2129 static void mos7840_set_termios(struct tty_struct *tty, 2130 struct usb_serial_port *port, 2131 struct ktermios *old_termios) 2132 { 2133 int status; 2134 unsigned int cflag; 2135 struct usb_serial *serial; 2136 struct moschip_port *mos7840_port; 2137 2138 if (mos7840_port_paranoia_check(port, __func__)) { 2139 dbg("%s", "Invalid port"); 2140 return; 2141 } 2142 2143 serial = port->serial; 2144 2145 if (mos7840_serial_paranoia_check(serial, __func__)) { 2146 dbg("%s", "Invalid Serial"); 2147 return; 2148 } 2149 2150 mos7840_port = mos7840_get_port_private(port); 2151 2152 if (mos7840_port == NULL) 2153 return; 2154 2155 if (!mos7840_port->open) { 2156 dbg("%s - port not opened", __func__); 2157 return; 2158 } 2159 2160 dbg("%s", "setting termios - "); 2161 2162 cflag = tty->termios->c_cflag; 2163 2164 dbg("%s - clfag %08x iflag %08x", __func__, 2165 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); 2166 dbg("%s - old clfag %08x old iflag %08x", __func__, 2167 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2168 dbg("%s - port %d", __func__, port->number); 2169 2170 /* change the port settings to the new ones specified */ 2171 2172 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2173 2174 if (!mos7840_port->read_urb) { 2175 dbg("%s", "URB KILLED !!!!!"); 2176 return; 2177 } 2178 2179 if (mos7840_port->read_urb_busy == false) { 2180 mos7840_port->read_urb_busy = true; 2181 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2182 if (status) { 2183 dbg("usb_submit_urb(read bulk) failed, status = %d", 2184 status); 2185 mos7840_port->read_urb_busy = false; 2186 } 2187 } 2188 } 2189 2190 /***************************************************************************** 2191 * mos7840_get_lsr_info - get line status register info 2192 * 2193 * Purpose: Let user call ioctl() to get info when the UART physically 2194 * is emptied. On bus types like RS485, the transmitter must 2195 * release the bus after transmitting. This must be done when 2196 * the transmit shift register is empty, not be done when the 2197 * transmit holding register is empty. This functionality 2198 * allows an RS485 driver to be written in user space. 2199 *****************************************************************************/ 2200 2201 static int mos7840_get_lsr_info(struct tty_struct *tty, 2202 unsigned int __user *value) 2203 { 2204 int count; 2205 unsigned int result = 0; 2206 2207 count = mos7840_chars_in_buffer(tty); 2208 if (count == 0) { 2209 dbg("%s -- Empty", __func__); 2210 result = TIOCSER_TEMT; 2211 } 2212 2213 if (copy_to_user(value, &result, sizeof(int))) 2214 return -EFAULT; 2215 return 0; 2216 } 2217 2218 /***************************************************************************** 2219 * mos7840_get_serial_info 2220 * function to get information about serial port 2221 *****************************************************************************/ 2222 2223 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2224 struct serial_struct __user *retinfo) 2225 { 2226 struct serial_struct tmp; 2227 2228 if (mos7840_port == NULL) 2229 return -1; 2230 2231 if (!retinfo) 2232 return -EFAULT; 2233 2234 memset(&tmp, 0, sizeof(tmp)); 2235 2236 tmp.type = PORT_16550A; 2237 tmp.line = mos7840_port->port->serial->minor; 2238 tmp.port = mos7840_port->port->number; 2239 tmp.irq = 0; 2240 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2241 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2242 tmp.baud_base = 9600; 2243 tmp.close_delay = 5 * HZ; 2244 tmp.closing_wait = 30 * HZ; 2245 2246 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2247 return -EFAULT; 2248 return 0; 2249 } 2250 2251 static int mos7840_get_icount(struct tty_struct *tty, 2252 struct serial_icounter_struct *icount) 2253 { 2254 struct usb_serial_port *port = tty->driver_data; 2255 struct moschip_port *mos7840_port; 2256 struct async_icount cnow; 2257 2258 mos7840_port = mos7840_get_port_private(port); 2259 cnow = mos7840_port->icount; 2260 2261 smp_rmb(); 2262 icount->cts = cnow.cts; 2263 icount->dsr = cnow.dsr; 2264 icount->rng = cnow.rng; 2265 icount->dcd = cnow.dcd; 2266 icount->rx = cnow.rx; 2267 icount->tx = cnow.tx; 2268 icount->frame = cnow.frame; 2269 icount->overrun = cnow.overrun; 2270 icount->parity = cnow.parity; 2271 icount->brk = cnow.brk; 2272 icount->buf_overrun = cnow.buf_overrun; 2273 2274 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2275 port->number, icount->rx, icount->tx); 2276 return 0; 2277 } 2278 2279 /***************************************************************************** 2280 * SerialIoctl 2281 * this function handles any ioctl calls to the driver 2282 *****************************************************************************/ 2283 2284 static int mos7840_ioctl(struct tty_struct *tty, 2285 unsigned int cmd, unsigned long arg) 2286 { 2287 struct usb_serial_port *port = tty->driver_data; 2288 void __user *argp = (void __user *)arg; 2289 struct moschip_port *mos7840_port; 2290 2291 struct async_icount cnow; 2292 struct async_icount cprev; 2293 2294 if (mos7840_port_paranoia_check(port, __func__)) { 2295 dbg("%s", "Invalid port"); 2296 return -1; 2297 } 2298 2299 mos7840_port = mos7840_get_port_private(port); 2300 2301 if (mos7840_port == NULL) 2302 return -1; 2303 2304 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2305 2306 switch (cmd) { 2307 /* return number of bytes available */ 2308 2309 case TIOCSERGETLSR: 2310 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); 2311 return mos7840_get_lsr_info(tty, argp); 2312 2313 case TIOCGSERIAL: 2314 dbg("%s (%d) TIOCGSERIAL", __func__, port->number); 2315 return mos7840_get_serial_info(mos7840_port, argp); 2316 2317 case TIOCSSERIAL: 2318 dbg("%s (%d) TIOCSSERIAL", __func__, port->number); 2319 break; 2320 2321 case TIOCMIWAIT: 2322 dbg("%s (%d) TIOCMIWAIT", __func__, port->number); 2323 cprev = mos7840_port->icount; 2324 while (1) { 2325 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2326 mos7840_port->delta_msr_cond = 0; 2327 wait_event_interruptible(mos7840_port->delta_msr_wait, 2328 (mos7840_port-> 2329 delta_msr_cond == 1)); 2330 2331 /* see if a signal did it */ 2332 if (signal_pending(current)) 2333 return -ERESTARTSYS; 2334 cnow = mos7840_port->icount; 2335 smp_rmb(); 2336 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2337 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2338 return -EIO; /* no change => error */ 2339 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2340 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2341 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2342 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2343 return 0; 2344 } 2345 cprev = cnow; 2346 } 2347 /* NOTREACHED */ 2348 break; 2349 2350 default: 2351 break; 2352 } 2353 return -ENOIOCTLCMD; 2354 } 2355 2356 static int mos7810_check(struct usb_serial *serial) 2357 { 2358 int i, pass_count = 0; 2359 __u16 data = 0, mcr_data = 0; 2360 __u16 test_pattern = 0x55AA; 2361 2362 /* Store MCR setting */ 2363 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2364 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2365 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2366 2367 for (i = 0; i < 16; i++) { 2368 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2369 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2370 MCS_WRREQ, MCS_WR_RTYPE, 2371 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2372 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2373 2374 /* Read the test pattern back */ 2375 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2376 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, 2377 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2378 2379 /* If this is a MCS7810 device, both test patterns must match */ 2380 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2381 break; 2382 2383 pass_count++; 2384 } 2385 2386 /* Restore MCR setting */ 2387 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2388 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2389 0, MOS_WDR_TIMEOUT); 2390 2391 if (pass_count == 16) 2392 return 1; 2393 2394 return 0; 2395 } 2396 2397 static int mos7840_calc_num_ports(struct usb_serial *serial) 2398 { 2399 __u16 data = 0x00; 2400 int mos7840_num_ports; 2401 2402 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2403 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, 2404 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2405 2406 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 || 2407 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) { 2408 device_type = serial->dev->descriptor.idProduct; 2409 } else { 2410 /* For a MCS7840 device GPIO0 must be set to 1 */ 2411 if ((data & 0x01) == 1) 2412 device_type = MOSCHIP_DEVICE_ID_7840; 2413 else if (mos7810_check(serial)) 2414 device_type = MOSCHIP_DEVICE_ID_7810; 2415 else 2416 device_type = MOSCHIP_DEVICE_ID_7820; 2417 } 2418 2419 mos7840_num_ports = (device_type >> 4) & 0x000F; 2420 serial->num_bulk_in = mos7840_num_ports; 2421 serial->num_bulk_out = mos7840_num_ports; 2422 serial->num_ports = mos7840_num_ports; 2423 2424 return mos7840_num_ports; 2425 } 2426 2427 /**************************************************************************** 2428 * mos7840_startup 2429 ****************************************************************************/ 2430 2431 static int mos7840_startup(struct usb_serial *serial) 2432 { 2433 struct moschip_port *mos7840_port; 2434 struct usb_device *dev; 2435 int i, status; 2436 __u16 Data; 2437 2438 if (!serial) { 2439 dbg("%s", "Invalid Handler"); 2440 return -1; 2441 } 2442 2443 dev = serial->dev; 2444 2445 /* we set up the pointers to the endpoints in the mos7840_open * 2446 * function, as the structures aren't created yet. */ 2447 2448 /* set up port private structures */ 2449 for (i = 0; i < serial->num_ports; ++i) { 2450 dbg ("mos7840_startup: configuring port %d............", i); 2451 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2452 if (mos7840_port == NULL) { 2453 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2454 status = -ENOMEM; 2455 i--; /* don't follow NULL pointer cleaning up */ 2456 goto error; 2457 } 2458 2459 /* Initialize all port interrupt end point to port 0 int 2460 * endpoint. Our device has only one interrupt end point 2461 * common to all port */ 2462 2463 mos7840_port->port = serial->port[i]; 2464 mos7840_set_port_private(serial->port[i], mos7840_port); 2465 spin_lock_init(&mos7840_port->pool_lock); 2466 2467 /* minor is not initialised until later by 2468 * usb-serial.c:get_free_serial() and cannot therefore be used 2469 * to index device instances */ 2470 mos7840_port->port_num = i + 1; 2471 dbg ("serial->port[i]->number = %d", serial->port[i]->number); 2472 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor); 2473 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num); 2474 dbg ("serial->minor = %d", serial->minor); 2475 2476 if (mos7840_port->port_num == 1) { 2477 mos7840_port->SpRegOffset = 0x0; 2478 mos7840_port->ControlRegOffset = 0x1; 2479 mos7840_port->DcrRegOffset = 0x4; 2480 } else if ((mos7840_port->port_num == 2) 2481 && (serial->num_ports == 4)) { 2482 mos7840_port->SpRegOffset = 0x8; 2483 mos7840_port->ControlRegOffset = 0x9; 2484 mos7840_port->DcrRegOffset = 0x16; 2485 } else if ((mos7840_port->port_num == 2) 2486 && (serial->num_ports == 2)) { 2487 mos7840_port->SpRegOffset = 0xa; 2488 mos7840_port->ControlRegOffset = 0xb; 2489 mos7840_port->DcrRegOffset = 0x19; 2490 } else if ((mos7840_port->port_num == 3) 2491 && (serial->num_ports == 4)) { 2492 mos7840_port->SpRegOffset = 0xa; 2493 mos7840_port->ControlRegOffset = 0xb; 2494 mos7840_port->DcrRegOffset = 0x19; 2495 } else if ((mos7840_port->port_num == 4) 2496 && (serial->num_ports == 4)) { 2497 mos7840_port->SpRegOffset = 0xc; 2498 mos7840_port->ControlRegOffset = 0xd; 2499 mos7840_port->DcrRegOffset = 0x1c; 2500 } 2501 mos7840_dump_serial_port(mos7840_port); 2502 mos7840_set_port_private(serial->port[i], mos7840_port); 2503 2504 /* enable rx_disable bit in control register */ 2505 status = mos7840_get_reg_sync(serial->port[i], 2506 mos7840_port->ControlRegOffset, &Data); 2507 if (status < 0) { 2508 dbg("Reading ControlReg failed status-0x%x", status); 2509 break; 2510 } else 2511 dbg("ControlReg Reading success val is %x, status%d", 2512 Data, status); 2513 Data |= 0x08; /* setting driver done bit */ 2514 Data |= 0x04; /* sp1_bit to have cts change reflect in 2515 modem status reg */ 2516 2517 /* Data |= 0x20; //rx_disable bit */ 2518 status = mos7840_set_reg_sync(serial->port[i], 2519 mos7840_port->ControlRegOffset, Data); 2520 if (status < 0) { 2521 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status); 2522 break; 2523 } else 2524 dbg("ControlReg Writing success(rx_disable) status%d", 2525 status); 2526 2527 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2528 and 0x24 in DCR3 */ 2529 Data = 0x01; 2530 status = mos7840_set_reg_sync(serial->port[i], 2531 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2532 if (status < 0) { 2533 dbg("Writing DCR0 failed status-0x%x", status); 2534 break; 2535 } else 2536 dbg("DCR0 Writing success status%d", status); 2537 2538 Data = 0x05; 2539 status = mos7840_set_reg_sync(serial->port[i], 2540 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2541 if (status < 0) { 2542 dbg("Writing DCR1 failed status-0x%x", status); 2543 break; 2544 } else 2545 dbg("DCR1 Writing success status%d", status); 2546 2547 Data = 0x24; 2548 status = mos7840_set_reg_sync(serial->port[i], 2549 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2550 if (status < 0) { 2551 dbg("Writing DCR2 failed status-0x%x", status); 2552 break; 2553 } else 2554 dbg("DCR2 Writing success status%d", status); 2555 2556 /* write values in clkstart0x0 and clkmulti 0x20 */ 2557 Data = 0x0; 2558 status = mos7840_set_reg_sync(serial->port[i], 2559 CLK_START_VALUE_REGISTER, Data); 2560 if (status < 0) { 2561 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status); 2562 break; 2563 } else 2564 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status); 2565 2566 Data = 0x20; 2567 status = mos7840_set_reg_sync(serial->port[i], 2568 CLK_MULTI_REGISTER, Data); 2569 if (status < 0) { 2570 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x", 2571 status); 2572 goto error; 2573 } else 2574 dbg("CLK_MULTI_REGISTER Writing success status%d", 2575 status); 2576 2577 /* write value 0x0 to scratchpad register */ 2578 Data = 0x00; 2579 status = mos7840_set_uart_reg(serial->port[i], 2580 SCRATCH_PAD_REGISTER, Data); 2581 if (status < 0) { 2582 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x", 2583 status); 2584 break; 2585 } else 2586 dbg("SCRATCH_PAD_REGISTER Writing success status%d", 2587 status); 2588 2589 /* Zero Length flag register */ 2590 if ((mos7840_port->port_num != 1) 2591 && (serial->num_ports == 2)) { 2592 2593 Data = 0xff; 2594 status = mos7840_set_reg_sync(serial->port[i], 2595 (__u16) (ZLP_REG1 + 2596 ((__u16)mos7840_port->port_num)), Data); 2597 dbg("ZLIP offset %x", 2598 (__u16) (ZLP_REG1 + 2599 ((__u16) mos7840_port->port_num))); 2600 if (status < 0) { 2601 dbg("Writing ZLP_REG%d failed status-0x%x", 2602 i + 2, status); 2603 break; 2604 } else 2605 dbg("ZLP_REG%d Writing success status%d", 2606 i + 2, status); 2607 } else { 2608 Data = 0xff; 2609 status = mos7840_set_reg_sync(serial->port[i], 2610 (__u16) (ZLP_REG1 + 2611 ((__u16)mos7840_port->port_num) - 0x1), Data); 2612 dbg("ZLIP offset %x", 2613 (__u16) (ZLP_REG1 + 2614 ((__u16) mos7840_port->port_num) - 0x1)); 2615 if (status < 0) { 2616 dbg("Writing ZLP_REG%d failed status-0x%x", 2617 i + 1, status); 2618 break; 2619 } else 2620 dbg("ZLP_REG%d Writing success status%d", 2621 i + 1, status); 2622 2623 } 2624 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2625 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2626 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2627 GFP_KERNEL); 2628 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2629 !mos7840_port->dr) { 2630 status = -ENOMEM; 2631 goto error; 2632 } 2633 2634 mos7840_port->has_led = false; 2635 2636 /* Initialize LED timers */ 2637 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2638 mos7840_port->has_led = true; 2639 2640 init_timer(&mos7840_port->led_timer1); 2641 mos7840_port->led_timer1.function = mos7840_led_off; 2642 mos7840_port->led_timer1.expires = 2643 jiffies + msecs_to_jiffies(LED_ON_MS); 2644 mos7840_port->led_timer1.data = 2645 (unsigned long)mos7840_port; 2646 2647 init_timer(&mos7840_port->led_timer2); 2648 mos7840_port->led_timer2.function = 2649 mos7840_led_flag_off; 2650 mos7840_port->led_timer2.expires = 2651 jiffies + msecs_to_jiffies(LED_OFF_MS); 2652 mos7840_port->led_timer2.data = 2653 (unsigned long)mos7840_port; 2654 2655 mos7840_port->led_flag = false; 2656 2657 /* Turn off LED */ 2658 mos7840_set_led_sync(serial->port[i], 2659 MODEM_CONTROL_REGISTER, 0x0300); 2660 } 2661 } 2662 dbg ("mos7840_startup: all ports configured..........."); 2663 2664 /* Zero Length flag enable */ 2665 Data = 0x0f; 2666 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2667 if (status < 0) { 2668 dbg("Writing ZLP_REG5 failed status-0x%x", status); 2669 goto error; 2670 } else 2671 dbg("ZLP_REG5 Writing success status%d", status); 2672 2673 /* setting configuration feature to one */ 2674 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2675 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); 2676 return 0; 2677 error: 2678 for (/* nothing */; i >= 0; i--) { 2679 mos7840_port = mos7840_get_port_private(serial->port[i]); 2680 2681 kfree(mos7840_port->dr); 2682 kfree(mos7840_port->ctrl_buf); 2683 usb_free_urb(mos7840_port->control_urb); 2684 kfree(mos7840_port); 2685 serial->port[i] = NULL; 2686 } 2687 return status; 2688 } 2689 2690 /**************************************************************************** 2691 * mos7840_disconnect 2692 * This function is called whenever the device is removed from the usb bus. 2693 ****************************************************************************/ 2694 2695 static void mos7840_disconnect(struct usb_serial *serial) 2696 { 2697 int i; 2698 unsigned long flags; 2699 struct moschip_port *mos7840_port; 2700 2701 if (!serial) { 2702 dbg("%s", "Invalid Handler"); 2703 return; 2704 } 2705 2706 /* check for the ports to be closed,close the ports and disconnect */ 2707 2708 /* free private structure allocated for serial port * 2709 * stop reads and writes on all ports */ 2710 2711 for (i = 0; i < serial->num_ports; ++i) { 2712 mos7840_port = mos7840_get_port_private(serial->port[i]); 2713 dbg ("mos7840_port %d = %p", i, mos7840_port); 2714 if (mos7840_port) { 2715 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2716 mos7840_port->zombie = 1; 2717 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2718 usb_kill_urb(mos7840_port->control_urb); 2719 } 2720 } 2721 } 2722 2723 /**************************************************************************** 2724 * mos7840_release 2725 * This function is called when the usb_serial structure is freed. 2726 ****************************************************************************/ 2727 2728 static void mos7840_release(struct usb_serial *serial) 2729 { 2730 int i; 2731 struct moschip_port *mos7840_port; 2732 2733 if (!serial) { 2734 dbg("%s", "Invalid Handler"); 2735 return; 2736 } 2737 2738 /* check for the ports to be closed,close the ports and disconnect */ 2739 2740 /* free private structure allocated for serial port * 2741 * stop reads and writes on all ports */ 2742 2743 for (i = 0; i < serial->num_ports; ++i) { 2744 mos7840_port = mos7840_get_port_private(serial->port[i]); 2745 dbg("mos7840_port %d = %p", i, mos7840_port); 2746 if (mos7840_port) { 2747 if (mos7840_port->has_led) { 2748 /* Turn off LED */ 2749 mos7840_set_led_sync(mos7840_port->port, 2750 MODEM_CONTROL_REGISTER, 0x0300); 2751 2752 del_timer_sync(&mos7840_port->led_timer1); 2753 del_timer_sync(&mos7840_port->led_timer2); 2754 } 2755 kfree(mos7840_port->ctrl_buf); 2756 kfree(mos7840_port->dr); 2757 kfree(mos7840_port); 2758 } 2759 } 2760 } 2761 2762 static struct usb_serial_driver moschip7840_4port_device = { 2763 .driver = { 2764 .owner = THIS_MODULE, 2765 .name = "mos7840", 2766 }, 2767 .description = DRIVER_DESC, 2768 .id_table = id_table, 2769 .num_ports = 4, 2770 .open = mos7840_open, 2771 .close = mos7840_close, 2772 .write = mos7840_write, 2773 .write_room = mos7840_write_room, 2774 .chars_in_buffer = mos7840_chars_in_buffer, 2775 .throttle = mos7840_throttle, 2776 .unthrottle = mos7840_unthrottle, 2777 .calc_num_ports = mos7840_calc_num_ports, 2778 #ifdef MCSSerialProbe 2779 .probe = mos7840_serial_probe, 2780 #endif 2781 .ioctl = mos7840_ioctl, 2782 .set_termios = mos7840_set_termios, 2783 .break_ctl = mos7840_break, 2784 .tiocmget = mos7840_tiocmget, 2785 .tiocmset = mos7840_tiocmset, 2786 .get_icount = mos7840_get_icount, 2787 .attach = mos7840_startup, 2788 .disconnect = mos7840_disconnect, 2789 .release = mos7840_release, 2790 .read_bulk_callback = mos7840_bulk_in_callback, 2791 .read_int_callback = mos7840_interrupt_callback, 2792 }; 2793 2794 static struct usb_serial_driver * const serial_drivers[] = { 2795 &moschip7840_4port_device, NULL 2796 }; 2797 2798 module_usb_serial_driver(serial_drivers, id_table); 2799 2800 MODULE_DESCRIPTION(DRIVER_DESC); 2801 MODULE_LICENSE("GPL"); 2802 2803 module_param(debug, bool, S_IRUGO | S_IWUSR); 2804 MODULE_PARM_DESC(debug, "Debug enabled or not"); 2805