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 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 39 40 /* 41 * 16C50 UART register defines 42 */ 43 44 #define LCR_BITS_5 0x00 /* 5 bits/char */ 45 #define LCR_BITS_6 0x01 /* 6 bits/char */ 46 #define LCR_BITS_7 0x02 /* 7 bits/char */ 47 #define LCR_BITS_8 0x03 /* 8 bits/char */ 48 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 49 50 #define LCR_STOP_1 0x00 /* 1 stop bit */ 51 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 52 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 53 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 54 55 #define LCR_PAR_NONE 0x00 /* No parity */ 56 #define LCR_PAR_ODD 0x08 /* Odd parity */ 57 #define LCR_PAR_EVEN 0x18 /* Even parity */ 58 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 59 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 60 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 61 62 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 63 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 64 65 #define MCR_DTR 0x01 /* Assert DTR */ 66 #define MCR_RTS 0x02 /* Assert RTS */ 67 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 68 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 69 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 70 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 71 72 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 73 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 74 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 75 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 76 77 /* 78 * Defines used for sending commands to port 79 */ 80 81 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ 82 83 #define MOS_PORT1 0x0200 84 #define MOS_PORT2 0x0300 85 #define MOS_VENREG 0x0000 86 #define MOS_MAX_PORT 0x02 87 #define MOS_WRITE 0x0E 88 #define MOS_READ 0x0D 89 90 /* Requests */ 91 #define MCS_RD_RTYPE 0xC0 92 #define MCS_WR_RTYPE 0x40 93 #define MCS_RDREQ 0x0D 94 #define MCS_WRREQ 0x0E 95 #define MCS_CTRL_TIMEOUT 500 96 #define VENDOR_READ_LENGTH (0x01) 97 98 #define MAX_NAME_LEN 64 99 100 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 101 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 102 103 /* For higher baud Rates use TIOCEXBAUD */ 104 #define TIOCEXBAUD 0x5462 105 106 /* vendor id and device id defines */ 107 108 /* The native mos7840/7820 component */ 109 #define USB_VENDOR_ID_MOSCHIP 0x9710 110 #define MOSCHIP_DEVICE_ID_7840 0x7840 111 #define MOSCHIP_DEVICE_ID_7820 0x7820 112 #define MOSCHIP_DEVICE_ID_7810 0x7810 113 /* The native component can have its vendor/device id's overridden 114 * in vendor-specific implementations. Such devices can be handled 115 * by making a change here, in id_table. 116 */ 117 #define USB_VENDOR_ID_BANDB 0x0856 118 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 119 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 120 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 121 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 122 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 123 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 124 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 125 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 126 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 127 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 128 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 129 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 130 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 131 132 /* This driver also supports 133 * ATEN UC2324 device using Moschip MCS7840 134 * ATEN UC2322 device using Moschip MCS7820 135 */ 136 #define USB_VENDOR_ID_ATENINTL 0x0557 137 #define ATENINTL_DEVICE_ID_UC2324 0x2011 138 #define ATENINTL_DEVICE_ID_UC2322 0x7820 139 140 /* Interrupt Routine Defines */ 141 142 #define SERIAL_IIR_RLS 0x06 143 #define SERIAL_IIR_MS 0x00 144 145 /* 146 * Emulation of the bit mask on the LINE STATUS REGISTER. 147 */ 148 #define SERIAL_LSR_DR 0x0001 149 #define SERIAL_LSR_OE 0x0002 150 #define SERIAL_LSR_PE 0x0004 151 #define SERIAL_LSR_FE 0x0008 152 #define SERIAL_LSR_BI 0x0010 153 154 #define MOS_MSR_DELTA_CTS 0x10 155 #define MOS_MSR_DELTA_DSR 0x20 156 #define MOS_MSR_DELTA_RI 0x40 157 #define MOS_MSR_DELTA_CD 0x80 158 159 /* Serial Port register Address */ 160 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 161 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 162 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 163 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 164 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 165 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 166 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 167 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 168 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 169 170 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 171 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 172 #define GPIO_REGISTER ((__u16)(0x07)) 173 174 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 175 176 /* 177 * URB POOL related defines 178 */ 179 #define NUM_URBS 16 /* URB Count */ 180 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 181 182 /* LED on/off milliseconds*/ 183 #define LED_ON_MS 500 184 #define LED_OFF_MS 500 185 186 static int device_type; 187 188 static const struct usb_device_id id_table[] = { 189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 190 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 206 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 207 {} /* terminating entry */ 208 }; 209 MODULE_DEVICE_TABLE(usb, id_table); 210 211 /* This structure holds all of the local port information */ 212 213 struct moschip_port { 214 int port_num; /*Actual port number in the device(1,2,etc) */ 215 struct urb *write_urb; /* write URB for this port */ 216 struct urb *read_urb; /* read URB for this port */ 217 __u8 shadowLCR; /* last LCR value received */ 218 __u8 shadowMCR; /* last MCR value received */ 219 char open; 220 char open_ports; 221 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 222 struct usb_serial_port *port; /* loop back to the owner of this object */ 223 224 /* Offsets */ 225 __u8 SpRegOffset; 226 __u8 ControlRegOffset; 227 __u8 DcrRegOffset; 228 /* for processing control URBS in interrupt context */ 229 struct urb *control_urb; 230 struct usb_ctrlrequest *dr; 231 char *ctrl_buf; 232 int MsrLsr; 233 234 spinlock_t pool_lock; 235 struct urb *write_urb_pool[NUM_URBS]; 236 char busy[NUM_URBS]; 237 bool read_urb_busy; 238 239 /* For device(s) with LED indicator */ 240 bool has_led; 241 bool led_flag; 242 struct timer_list led_timer1; /* Timer for LED on */ 243 struct timer_list led_timer2; /* Timer for LED off */ 244 }; 245 246 /* 247 * mos7840_set_reg_sync 248 * To set the Control register by calling usb_fill_control_urb function 249 * by passing usb_sndctrlpipe function as parameter. 250 */ 251 252 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 253 __u16 val) 254 { 255 struct usb_device *dev = port->serial->dev; 256 val = val & 0x00ff; 257 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 258 259 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 260 MCS_WR_RTYPE, val, reg, NULL, 0, 261 MOS_WDR_TIMEOUT); 262 } 263 264 /* 265 * mos7840_get_reg_sync 266 * To set the Uart register by calling usb_fill_control_urb function by 267 * passing usb_rcvctrlpipe function as parameter. 268 */ 269 270 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 271 __u16 *val) 272 { 273 struct usb_device *dev = port->serial->dev; 274 int ret = 0; 275 u8 *buf; 276 277 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 278 if (!buf) 279 return -ENOMEM; 280 281 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 282 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 283 MOS_WDR_TIMEOUT); 284 *val = buf[0]; 285 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 286 287 kfree(buf); 288 return ret; 289 } 290 291 /* 292 * mos7840_set_uart_reg 293 * To set the Uart register by calling usb_fill_control_urb function by 294 * passing usb_sndctrlpipe function as parameter. 295 */ 296 297 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 298 __u16 val) 299 { 300 301 struct usb_device *dev = port->serial->dev; 302 val = val & 0x00ff; 303 /* For the UART control registers, the application number need 304 to be Or'ed */ 305 if (port->serial->num_ports == 4) { 306 val |= (((__u16) port->number - 307 (__u16) (port->serial->minor)) + 1) << 8; 308 } else { 309 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 310 val |= (((__u16) port->number - 311 (__u16) (port->serial->minor)) + 1) << 8; 312 } else { 313 val |= (((__u16) port->number - 314 (__u16) (port->serial->minor)) + 2) << 8; 315 } 316 } 317 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 318 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 319 MCS_WR_RTYPE, val, reg, NULL, 0, 320 MOS_WDR_TIMEOUT); 321 322 } 323 324 /* 325 * mos7840_get_uart_reg 326 * To set the Control register by calling usb_fill_control_urb function 327 * by passing usb_rcvctrlpipe function as parameter. 328 */ 329 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 330 __u16 *val) 331 { 332 struct usb_device *dev = port->serial->dev; 333 int ret = 0; 334 __u16 Wval; 335 u8 *buf; 336 337 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 338 if (!buf) 339 return -ENOMEM; 340 341 /* Wval is same as application number */ 342 if (port->serial->num_ports == 4) { 343 Wval = 344 (((__u16) port->number - (__u16) (port->serial->minor)) + 345 1) << 8; 346 } else { 347 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 348 Wval = (((__u16) port->number - 349 (__u16) (port->serial->minor)) + 1) << 8; 350 } else { 351 Wval = (((__u16) port->number - 352 (__u16) (port->serial->minor)) + 2) << 8; 353 } 354 } 355 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 356 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 357 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 358 MOS_WDR_TIMEOUT); 359 *val = buf[0]; 360 361 kfree(buf); 362 return ret; 363 } 364 365 static void mos7840_dump_serial_port(struct usb_serial_port *port, 366 struct moschip_port *mos7840_port) 367 { 368 369 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 370 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 371 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 372 373 } 374 375 /************************************************************************/ 376 /************************************************************************/ 377 /* I N T E R F A C E F U N C T I O N S */ 378 /* I N T E R F A C E F U N C T I O N S */ 379 /************************************************************************/ 380 /************************************************************************/ 381 382 static inline void mos7840_set_port_private(struct usb_serial_port *port, 383 struct moschip_port *data) 384 { 385 usb_set_serial_port_data(port, (void *)data); 386 } 387 388 static inline struct moschip_port *mos7840_get_port_private(struct 389 usb_serial_port 390 *port) 391 { 392 return (struct moschip_port *)usb_get_serial_port_data(port); 393 } 394 395 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 396 { 397 struct moschip_port *mos7840_port; 398 struct async_icount *icount; 399 mos7840_port = port; 400 if (new_msr & 401 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 402 MOS_MSR_DELTA_CD)) { 403 icount = &mos7840_port->port->icount; 404 405 /* update input line counters */ 406 if (new_msr & MOS_MSR_DELTA_CTS) 407 icount->cts++; 408 if (new_msr & MOS_MSR_DELTA_DSR) 409 icount->dsr++; 410 if (new_msr & MOS_MSR_DELTA_CD) 411 icount->dcd++; 412 if (new_msr & MOS_MSR_DELTA_RI) 413 icount->rng++; 414 415 wake_up_interruptible(&port->port->port.delta_msr_wait); 416 } 417 } 418 419 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 420 { 421 struct async_icount *icount; 422 423 if (new_lsr & SERIAL_LSR_BI) { 424 /* 425 * Parity and Framing errors only count if they 426 * occur exclusive of a break being 427 * received. 428 */ 429 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 430 } 431 432 /* update input line counters */ 433 icount = &port->port->icount; 434 if (new_lsr & SERIAL_LSR_BI) 435 icount->brk++; 436 if (new_lsr & SERIAL_LSR_OE) 437 icount->overrun++; 438 if (new_lsr & SERIAL_LSR_PE) 439 icount->parity++; 440 if (new_lsr & SERIAL_LSR_FE) 441 icount->frame++; 442 } 443 444 /************************************************************************/ 445 /************************************************************************/ 446 /* U S B C A L L B A C K F U N C T I O N S */ 447 /* U S B C A L L B A C K F U N C T I O N S */ 448 /************************************************************************/ 449 /************************************************************************/ 450 451 static void mos7840_control_callback(struct urb *urb) 452 { 453 unsigned char *data; 454 struct moschip_port *mos7840_port; 455 struct device *dev = &urb->dev->dev; 456 __u8 regval = 0x0; 457 int status = urb->status; 458 459 mos7840_port = urb->context; 460 461 switch (status) { 462 case 0: 463 /* success */ 464 break; 465 case -ECONNRESET: 466 case -ENOENT: 467 case -ESHUTDOWN: 468 /* this urb is terminated, clean up */ 469 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 470 return; 471 default: 472 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 473 return; 474 } 475 476 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 477 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 478 mos7840_port->MsrLsr, mos7840_port->port_num); 479 data = urb->transfer_buffer; 480 regval = (__u8) data[0]; 481 dev_dbg(dev, "%s data is %x\n", __func__, regval); 482 if (mos7840_port->MsrLsr == 0) 483 mos7840_handle_new_msr(mos7840_port, regval); 484 else if (mos7840_port->MsrLsr == 1) 485 mos7840_handle_new_lsr(mos7840_port, regval); 486 } 487 488 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 489 __u16 *val) 490 { 491 struct usb_device *dev = mcs->port->serial->dev; 492 struct usb_ctrlrequest *dr = mcs->dr; 493 unsigned char *buffer = mcs->ctrl_buf; 494 int ret; 495 496 dr->bRequestType = MCS_RD_RTYPE; 497 dr->bRequest = MCS_RDREQ; 498 dr->wValue = cpu_to_le16(Wval); /* 0 */ 499 dr->wIndex = cpu_to_le16(reg); 500 dr->wLength = cpu_to_le16(2); 501 502 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 503 (unsigned char *)dr, buffer, 2, 504 mos7840_control_callback, mcs); 505 mcs->control_urb->transfer_buffer_length = 2; 506 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 507 return ret; 508 } 509 510 static void mos7840_set_led_callback(struct urb *urb) 511 { 512 switch (urb->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 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d", 521 __func__, urb->status); 522 break; 523 default: 524 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d", 525 __func__, urb->status); 526 } 527 } 528 529 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 530 __u16 reg) 531 { 532 struct usb_device *dev = mcs->port->serial->dev; 533 struct usb_ctrlrequest *dr = mcs->dr; 534 535 dr->bRequestType = MCS_WR_RTYPE; 536 dr->bRequest = MCS_WRREQ; 537 dr->wValue = cpu_to_le16(wval); 538 dr->wIndex = cpu_to_le16(reg); 539 dr->wLength = cpu_to_le16(0); 540 541 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0), 542 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 543 544 usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 545 } 546 547 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 548 __u16 val) 549 { 550 struct usb_device *dev = port->serial->dev; 551 552 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 553 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 554 } 555 556 static void mos7840_led_off(unsigned long arg) 557 { 558 struct moschip_port *mcs = (struct moschip_port *) arg; 559 560 /* Turn off LED */ 561 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 562 mod_timer(&mcs->led_timer2, 563 jiffies + msecs_to_jiffies(LED_OFF_MS)); 564 } 565 566 static void mos7840_led_flag_off(unsigned long arg) 567 { 568 struct moschip_port *mcs = (struct moschip_port *) arg; 569 570 mcs->led_flag = false; 571 } 572 573 /***************************************************************************** 574 * mos7840_interrupt_callback 575 * this is the callback function for when we have received data on the 576 * interrupt endpoint. 577 *****************************************************************************/ 578 579 static void mos7840_interrupt_callback(struct urb *urb) 580 { 581 int result; 582 int length; 583 struct moschip_port *mos7840_port; 584 struct usb_serial *serial; 585 __u16 Data; 586 unsigned char *data; 587 __u8 sp[5], st; 588 int i, rv = 0; 589 __u16 wval, wreg = 0; 590 int status = urb->status; 591 592 switch (status) { 593 case 0: 594 /* success */ 595 break; 596 case -ECONNRESET: 597 case -ENOENT: 598 case -ESHUTDOWN: 599 /* this urb is terminated, clean up */ 600 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 601 __func__, status); 602 return; 603 default: 604 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 605 __func__, status); 606 goto exit; 607 } 608 609 length = urb->actual_length; 610 data = urb->transfer_buffer; 611 612 serial = urb->context; 613 614 /* Moschip get 5 bytes 615 * Byte 1 IIR Port 1 (port.number is 0) 616 * Byte 2 IIR Port 2 (port.number is 1) 617 * Byte 3 IIR Port 3 (port.number is 2) 618 * Byte 4 IIR Port 4 (port.number is 3) 619 * Byte 5 FIFO status for both */ 620 621 if (length && length > 5) { 622 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 623 return; 624 } 625 626 sp[0] = (__u8) data[0]; 627 sp[1] = (__u8) data[1]; 628 sp[2] = (__u8) data[2]; 629 sp[3] = (__u8) data[3]; 630 st = (__u8) data[4]; 631 632 for (i = 0; i < serial->num_ports; i++) { 633 mos7840_port = mos7840_get_port_private(serial->port[i]); 634 wval = 635 (((__u16) serial->port[i]->number - 636 (__u16) (serial->minor)) + 1) << 8; 637 if (mos7840_port->open) { 638 if (sp[i] & 0x01) { 639 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 640 } else { 641 switch (sp[i] & 0x0f) { 642 case SERIAL_IIR_RLS: 643 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 644 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 645 mos7840_port->MsrLsr = 1; 646 wreg = LINE_STATUS_REGISTER; 647 break; 648 case SERIAL_IIR_MS: 649 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 650 mos7840_port->MsrLsr = 0; 651 wreg = MODEM_STATUS_REGISTER; 652 break; 653 } 654 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 655 } 656 } 657 } 658 if (!(rv < 0)) 659 /* the completion handler for the control urb will resubmit */ 660 return; 661 exit: 662 result = usb_submit_urb(urb, GFP_ATOMIC); 663 if (result) { 664 dev_err(&urb->dev->dev, 665 "%s - Error %d submitting interrupt urb\n", 666 __func__, result); 667 } 668 } 669 670 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 671 const char *function) 672 { 673 if (!port) { 674 pr_debug("%s - port == NULL\n", function); 675 return -1; 676 } 677 if (!port->serial) { 678 pr_debug("%s - port->serial == NULL\n", function); 679 return -1; 680 } 681 682 return 0; 683 } 684 685 /* Inline functions to check the sanity of a pointer that is passed to us */ 686 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 687 const char *function) 688 { 689 if (!serial) { 690 pr_debug("%s - serial == NULL\n", function); 691 return -1; 692 } 693 if (!serial->type) { 694 pr_debug("%s - serial->type == NULL!\n", function); 695 return -1; 696 } 697 698 return 0; 699 } 700 701 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 702 const char *function) 703 { 704 /* if no port was specified, or it fails a paranoia check */ 705 if (!port || 706 mos7840_port_paranoia_check(port, function) || 707 mos7840_serial_paranoia_check(port->serial, function)) { 708 /* then say that we don't have a valid usb_serial thing, 709 * which will end up genrating -ENODEV return values */ 710 return NULL; 711 } 712 713 return port->serial; 714 } 715 716 /***************************************************************************** 717 * mos7840_bulk_in_callback 718 * this is the callback function for when we have received data on the 719 * bulk in endpoint. 720 *****************************************************************************/ 721 722 static void mos7840_bulk_in_callback(struct urb *urb) 723 { 724 int retval; 725 unsigned char *data; 726 struct usb_serial *serial; 727 struct usb_serial_port *port; 728 struct moschip_port *mos7840_port; 729 int status = urb->status; 730 731 mos7840_port = urb->context; 732 if (!mos7840_port) 733 return; 734 735 if (status) { 736 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 737 mos7840_port->read_urb_busy = false; 738 return; 739 } 740 741 port = mos7840_port->port; 742 if (mos7840_port_paranoia_check(port, __func__)) { 743 mos7840_port->read_urb_busy = false; 744 return; 745 } 746 747 serial = mos7840_get_usb_serial(port, __func__); 748 if (!serial) { 749 mos7840_port->read_urb_busy = false; 750 return; 751 } 752 753 data = urb->transfer_buffer; 754 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 755 756 if (urb->actual_length) { 757 struct tty_port *tport = &mos7840_port->port->port; 758 tty_insert_flip_string(tport, data, urb->actual_length); 759 tty_flip_buffer_push(tport); 760 port->icount.rx += urb->actual_length; 761 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); 762 } 763 764 if (!mos7840_port->read_urb) { 765 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 766 mos7840_port->read_urb_busy = false; 767 return; 768 } 769 770 /* Turn on LED */ 771 if (mos7840_port->has_led && !mos7840_port->led_flag) { 772 mos7840_port->led_flag = true; 773 mos7840_set_led_async(mos7840_port, 0x0301, 774 MODEM_CONTROL_REGISTER); 775 mod_timer(&mos7840_port->led_timer1, 776 jiffies + msecs_to_jiffies(LED_ON_MS)); 777 } 778 779 mos7840_port->read_urb_busy = true; 780 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 781 782 if (retval) { 783 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 784 mos7840_port->read_urb_busy = false; 785 } 786 } 787 788 /***************************************************************************** 789 * mos7840_bulk_out_data_callback 790 * this is the callback function for when we have finished sending 791 * serial data on the bulk out endpoint. 792 *****************************************************************************/ 793 794 static void mos7840_bulk_out_data_callback(struct urb *urb) 795 { 796 struct moschip_port *mos7840_port; 797 struct usb_serial_port *port; 798 int status = urb->status; 799 int i; 800 801 mos7840_port = urb->context; 802 port = mos7840_port->port; 803 spin_lock(&mos7840_port->pool_lock); 804 for (i = 0; i < NUM_URBS; i++) { 805 if (urb == mos7840_port->write_urb_pool[i]) { 806 mos7840_port->busy[i] = 0; 807 break; 808 } 809 } 810 spin_unlock(&mos7840_port->pool_lock); 811 812 if (status) { 813 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 814 return; 815 } 816 817 if (mos7840_port_paranoia_check(port, __func__)) 818 return; 819 820 if (mos7840_port->open) 821 tty_port_tty_wakeup(&port->port); 822 823 } 824 825 /************************************************************************/ 826 /* 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 */ 827 /************************************************************************/ 828 #ifdef MCSSerialProbe 829 static int mos7840_serial_probe(struct usb_serial *serial, 830 const struct usb_device_id *id) 831 { 832 833 /*need to implement the mode_reg reading and updating\ 834 structures usb_serial_ device_type\ 835 (i.e num_ports, num_bulkin,bulkout etc) */ 836 /* Also we can update the changes attach */ 837 return 1; 838 } 839 #endif 840 841 /***************************************************************************** 842 * mos7840_open 843 * this function is called by the tty driver when a port is opened 844 * If successful, we return 0 845 * Otherwise we return a negative error number. 846 *****************************************************************************/ 847 848 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 849 { 850 int response; 851 int j; 852 struct usb_serial *serial; 853 struct urb *urb; 854 __u16 Data; 855 int status; 856 struct moschip_port *mos7840_port; 857 struct moschip_port *port0; 858 859 if (mos7840_port_paranoia_check(port, __func__)) 860 return -ENODEV; 861 862 serial = port->serial; 863 864 if (mos7840_serial_paranoia_check(serial, __func__)) 865 return -ENODEV; 866 867 mos7840_port = mos7840_get_port_private(port); 868 port0 = mos7840_get_port_private(serial->port[0]); 869 870 if (mos7840_port == NULL || port0 == NULL) 871 return -ENODEV; 872 873 usb_clear_halt(serial->dev, port->write_urb->pipe); 874 usb_clear_halt(serial->dev, port->read_urb->pipe); 875 port0->open_ports++; 876 877 /* Initialising the write urb pool */ 878 for (j = 0; j < NUM_URBS; ++j) { 879 urb = usb_alloc_urb(0, GFP_KERNEL); 880 mos7840_port->write_urb_pool[j] = urb; 881 882 if (urb == NULL) { 883 dev_err(&port->dev, "No more urbs???\n"); 884 continue; 885 } 886 887 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 888 GFP_KERNEL); 889 if (!urb->transfer_buffer) { 890 usb_free_urb(urb); 891 mos7840_port->write_urb_pool[j] = NULL; 892 dev_err(&port->dev, 893 "%s-out of memory for urb buffers.\n", 894 __func__); 895 continue; 896 } 897 } 898 899 /***************************************************************************** 900 * Initialize MCS7840 -- Write Init values to corresponding Registers 901 * 902 * Register Index 903 * 1 : IER 904 * 2 : FCR 905 * 3 : LCR 906 * 4 : MCR 907 * 908 * 0x08 : SP1/2 Control Reg 909 *****************************************************************************/ 910 911 /* NEED to check the following Block */ 912 913 Data = 0x0; 914 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 915 if (status < 0) { 916 dev_dbg(&port->dev, "Reading Spreg failed\n"); 917 return -1; 918 } 919 Data |= 0x80; 920 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 921 if (status < 0) { 922 dev_dbg(&port->dev, "writing Spreg failed\n"); 923 return -1; 924 } 925 926 Data &= ~0x80; 927 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 928 if (status < 0) { 929 dev_dbg(&port->dev, "writing Spreg failed\n"); 930 return -1; 931 } 932 /* End of block to be checked */ 933 934 Data = 0x0; 935 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 936 &Data); 937 if (status < 0) { 938 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 939 return -1; 940 } 941 Data |= 0x08; /* Driver done bit */ 942 Data |= 0x20; /* rx_disable */ 943 status = mos7840_set_reg_sync(port, 944 mos7840_port->ControlRegOffset, Data); 945 if (status < 0) { 946 dev_dbg(&port->dev, "writing Controlreg failed\n"); 947 return -1; 948 } 949 /* do register settings here */ 950 /* Set all regs to the device default values. */ 951 /*********************************** 952 * First Disable all interrupts. 953 ***********************************/ 954 Data = 0x00; 955 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 956 if (status < 0) { 957 dev_dbg(&port->dev, "disabling interrupts failed\n"); 958 return -1; 959 } 960 /* Set FIFO_CONTROL_REGISTER to the default value */ 961 Data = 0x00; 962 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 963 if (status < 0) { 964 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 965 return -1; 966 } 967 968 Data = 0xcf; 969 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 970 if (status < 0) { 971 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 972 return -1; 973 } 974 975 Data = 0x03; 976 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 977 mos7840_port->shadowLCR = Data; 978 979 Data = 0x0b; 980 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 981 mos7840_port->shadowMCR = Data; 982 983 Data = 0x00; 984 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 985 mos7840_port->shadowLCR = Data; 986 987 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 988 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 989 990 Data = 0x0c; 991 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 992 993 Data = 0x0; 994 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 995 996 Data = 0x00; 997 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 998 999 Data = Data & ~SERIAL_LCR_DLAB; 1000 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1001 mos7840_port->shadowLCR = Data; 1002 1003 /* clearing Bulkin and Bulkout Fifo */ 1004 Data = 0x0; 1005 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1006 1007 Data = Data | 0x0c; 1008 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1009 1010 Data = Data & ~0x0c; 1011 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1012 /* Finally enable all interrupts */ 1013 Data = 0x0c; 1014 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1015 1016 /* clearing rx_disable */ 1017 Data = 0x0; 1018 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1019 &Data); 1020 Data = Data & ~0x20; 1021 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1022 Data); 1023 1024 /* rx_negate */ 1025 Data = 0x0; 1026 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1027 &Data); 1028 Data = Data | 0x10; 1029 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1030 Data); 1031 1032 /* Check to see if we've set up our endpoint info yet * 1033 * (can't set it up in mos7840_startup as the structures * 1034 * were not set up at that time.) */ 1035 if (port0->open_ports == 1) { 1036 if (serial->port[0]->interrupt_in_buffer == NULL) { 1037 /* set up interrupt urb */ 1038 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1039 serial->dev, 1040 usb_rcvintpipe(serial->dev, 1041 serial->port[0]->interrupt_in_endpointAddress), 1042 serial->port[0]->interrupt_in_buffer, 1043 serial->port[0]->interrupt_in_urb-> 1044 transfer_buffer_length, 1045 mos7840_interrupt_callback, 1046 serial, 1047 serial->port[0]->interrupt_in_urb->interval); 1048 1049 /* start interrupt read for mos7840 * 1050 * will continue as long as mos7840 is connected */ 1051 1052 response = 1053 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1054 GFP_KERNEL); 1055 if (response) { 1056 dev_err(&port->dev, "%s - Error %d submitting " 1057 "interrupt urb\n", __func__, response); 1058 } 1059 1060 } 1061 1062 } 1063 1064 /* see if we've set up our endpoint info yet * 1065 * (can't set it up in mos7840_startup as the * 1066 * structures were not set up at that time.) */ 1067 1068 dev_dbg(&port->dev, "port number is %d\n", port->number); 1069 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor); 1070 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1071 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1072 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1073 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1074 mos7840_port->read_urb = port->read_urb; 1075 1076 /* set up our bulk in urb */ 1077 if ((serial->num_ports == 2) 1078 && ((((__u16)port->number - 1079 (__u16)(port->serial->minor)) % 2) != 0)) { 1080 usb_fill_bulk_urb(mos7840_port->read_urb, 1081 serial->dev, 1082 usb_rcvbulkpipe(serial->dev, 1083 (port->bulk_in_endpointAddress) + 2), 1084 port->bulk_in_buffer, 1085 mos7840_port->read_urb->transfer_buffer_length, 1086 mos7840_bulk_in_callback, mos7840_port); 1087 } else { 1088 usb_fill_bulk_urb(mos7840_port->read_urb, 1089 serial->dev, 1090 usb_rcvbulkpipe(serial->dev, 1091 port->bulk_in_endpointAddress), 1092 port->bulk_in_buffer, 1093 mos7840_port->read_urb->transfer_buffer_length, 1094 mos7840_bulk_in_callback, mos7840_port); 1095 } 1096 1097 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1098 mos7840_port->read_urb_busy = true; 1099 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1100 if (response) { 1101 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1102 __func__, response); 1103 mos7840_port->read_urb_busy = false; 1104 } 1105 1106 /* initialize our wait queues */ 1107 init_waitqueue_head(&mos7840_port->wait_chase); 1108 1109 /* initialize our port settings */ 1110 /* Must set to enable ints! */ 1111 mos7840_port->shadowMCR = MCR_MASTER_IE; 1112 /* send a open port command */ 1113 mos7840_port->open = 1; 1114 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1115 1116 return 0; 1117 } 1118 1119 /***************************************************************************** 1120 * mos7840_chars_in_buffer 1121 * this function is called by the tty driver when it wants to know how many 1122 * bytes of data we currently have outstanding in the port (data that has 1123 * been written, but hasn't made it out the port yet) 1124 * If successful, we return the number of bytes left to be written in the 1125 * system, 1126 * Otherwise we return zero. 1127 *****************************************************************************/ 1128 1129 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1130 { 1131 struct usb_serial_port *port = tty->driver_data; 1132 int i; 1133 int chars = 0; 1134 unsigned long flags; 1135 struct moschip_port *mos7840_port; 1136 1137 if (mos7840_port_paranoia_check(port, __func__)) 1138 return 0; 1139 1140 mos7840_port = mos7840_get_port_private(port); 1141 if (mos7840_port == NULL) 1142 return 0; 1143 1144 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1145 for (i = 0; i < NUM_URBS; ++i) { 1146 if (mos7840_port->busy[i]) { 1147 struct urb *urb = mos7840_port->write_urb_pool[i]; 1148 chars += urb->transfer_buffer_length; 1149 } 1150 } 1151 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1152 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1153 return chars; 1154 1155 } 1156 1157 /***************************************************************************** 1158 * mos7840_close 1159 * this function is called by the tty driver when a port is closed 1160 *****************************************************************************/ 1161 1162 static void mos7840_close(struct usb_serial_port *port) 1163 { 1164 struct usb_serial *serial; 1165 struct moschip_port *mos7840_port; 1166 struct moschip_port *port0; 1167 int j; 1168 __u16 Data; 1169 1170 if (mos7840_port_paranoia_check(port, __func__)) 1171 return; 1172 1173 serial = mos7840_get_usb_serial(port, __func__); 1174 if (!serial) 1175 return; 1176 1177 mos7840_port = mos7840_get_port_private(port); 1178 port0 = mos7840_get_port_private(serial->port[0]); 1179 1180 if (mos7840_port == NULL || port0 == NULL) 1181 return; 1182 1183 for (j = 0; j < NUM_URBS; ++j) 1184 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1185 1186 /* Freeing Write URBs */ 1187 for (j = 0; j < NUM_URBS; ++j) { 1188 if (mos7840_port->write_urb_pool[j]) { 1189 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1190 kfree(mos7840_port->write_urb_pool[j]-> 1191 transfer_buffer); 1192 1193 usb_free_urb(mos7840_port->write_urb_pool[j]); 1194 } 1195 } 1196 1197 usb_kill_urb(mos7840_port->write_urb); 1198 usb_kill_urb(mos7840_port->read_urb); 1199 mos7840_port->read_urb_busy = false; 1200 1201 port0->open_ports--; 1202 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number); 1203 if (port0->open_ports == 0) { 1204 if (serial->port[0]->interrupt_in_urb) { 1205 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1206 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1207 } 1208 } 1209 1210 if (mos7840_port->write_urb) { 1211 /* if this urb had a transfer buffer already (old tx) free it */ 1212 kfree(mos7840_port->write_urb->transfer_buffer); 1213 usb_free_urb(mos7840_port->write_urb); 1214 } 1215 1216 Data = 0x0; 1217 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1218 1219 Data = 0x00; 1220 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1221 1222 mos7840_port->open = 0; 1223 } 1224 1225 /************************************************************************ 1226 * 1227 * mos7840_block_until_chase_response 1228 * 1229 * This function will block the close until one of the following: 1230 * 1. Response to our Chase comes from mos7840 1231 * 2. A timeout of 10 seconds without activity has expired 1232 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1233 * 1234 ************************************************************************/ 1235 1236 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1237 struct moschip_port *mos7840_port) 1238 { 1239 int timeout = msecs_to_jiffies(1000); 1240 int wait = 10; 1241 int count; 1242 1243 while (1) { 1244 count = mos7840_chars_in_buffer(tty); 1245 1246 /* Check for Buffer status */ 1247 if (count <= 0) 1248 return; 1249 1250 /* Block the thread for a while */ 1251 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1252 timeout); 1253 /* No activity.. count down section */ 1254 wait--; 1255 if (wait == 0) { 1256 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__); 1257 return; 1258 } else { 1259 /* Reset timeout value back to seconds */ 1260 wait = 10; 1261 } 1262 } 1263 1264 } 1265 1266 /***************************************************************************** 1267 * mos7840_break 1268 * this function sends a break to the port 1269 *****************************************************************************/ 1270 static void mos7840_break(struct tty_struct *tty, int break_state) 1271 { 1272 struct usb_serial_port *port = tty->driver_data; 1273 unsigned char data; 1274 struct usb_serial *serial; 1275 struct moschip_port *mos7840_port; 1276 1277 if (mos7840_port_paranoia_check(port, __func__)) 1278 return; 1279 1280 serial = mos7840_get_usb_serial(port, __func__); 1281 if (!serial) 1282 return; 1283 1284 mos7840_port = mos7840_get_port_private(port); 1285 1286 if (mos7840_port == NULL) 1287 return; 1288 1289 /* flush and block until tx is empty */ 1290 mos7840_block_until_chase_response(tty, mos7840_port); 1291 1292 if (break_state == -1) 1293 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1294 else 1295 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1296 1297 /* FIXME: no locking on shadowLCR anywhere in driver */ 1298 mos7840_port->shadowLCR = data; 1299 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1300 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1301 mos7840_port->shadowLCR); 1302 } 1303 1304 /***************************************************************************** 1305 * mos7840_write_room 1306 * this function is called by the tty driver when it wants to know how many 1307 * bytes of data we can accept for a specific port. 1308 * If successful, we return the amount of room that we have for this port 1309 * Otherwise we return a negative error number. 1310 *****************************************************************************/ 1311 1312 static int mos7840_write_room(struct tty_struct *tty) 1313 { 1314 struct usb_serial_port *port = tty->driver_data; 1315 int i; 1316 int room = 0; 1317 unsigned long flags; 1318 struct moschip_port *mos7840_port; 1319 1320 if (mos7840_port_paranoia_check(port, __func__)) 1321 return -1; 1322 1323 mos7840_port = mos7840_get_port_private(port); 1324 if (mos7840_port == NULL) 1325 return -1; 1326 1327 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1328 for (i = 0; i < NUM_URBS; ++i) { 1329 if (!mos7840_port->busy[i]) 1330 room += URB_TRANSFER_BUFFER_SIZE; 1331 } 1332 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1333 1334 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1335 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1336 return room; 1337 1338 } 1339 1340 /***************************************************************************** 1341 * mos7840_write 1342 * this function is called by the tty driver when data should be written to 1343 * the port. 1344 * If successful, we return the number of bytes written, otherwise we 1345 * return a negative error number. 1346 *****************************************************************************/ 1347 1348 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1349 const unsigned char *data, int count) 1350 { 1351 int status; 1352 int i; 1353 int bytes_sent = 0; 1354 int transfer_size; 1355 unsigned long flags; 1356 1357 struct moschip_port *mos7840_port; 1358 struct usb_serial *serial; 1359 struct urb *urb; 1360 /* __u16 Data; */ 1361 const unsigned char *current_position = data; 1362 unsigned char *data1; 1363 1364 #ifdef NOTMOS7840 1365 Data = 0x00; 1366 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1367 mos7840_port->shadowLCR = Data; 1368 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1369 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1370 1371 /* Data = 0x03; */ 1372 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1373 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1374 1375 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1376 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1377 1378 /* Data = 0x0c; */ 1379 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1380 Data = 0x00; 1381 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1382 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1383 1384 Data = 0x0; 1385 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1386 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1387 1388 Data = Data & ~SERIAL_LCR_DLAB; 1389 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1390 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1391 #endif 1392 1393 if (mos7840_port_paranoia_check(port, __func__)) 1394 return -1; 1395 1396 serial = port->serial; 1397 if (mos7840_serial_paranoia_check(serial, __func__)) 1398 return -1; 1399 1400 mos7840_port = mos7840_get_port_private(port); 1401 if (mos7840_port == NULL) 1402 return -1; 1403 1404 /* try to find a free urb in the list */ 1405 urb = NULL; 1406 1407 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1408 for (i = 0; i < NUM_URBS; ++i) { 1409 if (!mos7840_port->busy[i]) { 1410 mos7840_port->busy[i] = 1; 1411 urb = mos7840_port->write_urb_pool[i]; 1412 dev_dbg(&port->dev, "URB:%d\n", i); 1413 break; 1414 } 1415 } 1416 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1417 1418 if (urb == NULL) { 1419 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1420 goto exit; 1421 } 1422 1423 if (urb->transfer_buffer == NULL) { 1424 urb->transfer_buffer = 1425 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1426 1427 if (urb->transfer_buffer == NULL) { 1428 dev_err_console(port, "%s no more kernel memory...\n", 1429 __func__); 1430 goto exit; 1431 } 1432 } 1433 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1434 1435 memcpy(urb->transfer_buffer, current_position, transfer_size); 1436 1437 /* fill urb with data and submit */ 1438 if ((serial->num_ports == 2) 1439 && ((((__u16)port->number - 1440 (__u16)(port->serial->minor)) % 2) != 0)) { 1441 usb_fill_bulk_urb(urb, 1442 serial->dev, 1443 usb_sndbulkpipe(serial->dev, 1444 (port->bulk_out_endpointAddress) + 2), 1445 urb->transfer_buffer, 1446 transfer_size, 1447 mos7840_bulk_out_data_callback, mos7840_port); 1448 } else { 1449 usb_fill_bulk_urb(urb, 1450 serial->dev, 1451 usb_sndbulkpipe(serial->dev, 1452 port->bulk_out_endpointAddress), 1453 urb->transfer_buffer, 1454 transfer_size, 1455 mos7840_bulk_out_data_callback, mos7840_port); 1456 } 1457 1458 data1 = urb->transfer_buffer; 1459 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1460 1461 /* Turn on LED */ 1462 if (mos7840_port->has_led && !mos7840_port->led_flag) { 1463 mos7840_port->led_flag = true; 1464 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301); 1465 mod_timer(&mos7840_port->led_timer1, 1466 jiffies + msecs_to_jiffies(LED_ON_MS)); 1467 } 1468 1469 /* send it down the pipe */ 1470 status = usb_submit_urb(urb, GFP_ATOMIC); 1471 1472 if (status) { 1473 mos7840_port->busy[i] = 0; 1474 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1475 "with status = %d\n", __func__, status); 1476 bytes_sent = status; 1477 goto exit; 1478 } 1479 bytes_sent = transfer_size; 1480 port->icount.tx += transfer_size; 1481 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1482 exit: 1483 return bytes_sent; 1484 1485 } 1486 1487 /***************************************************************************** 1488 * mos7840_throttle 1489 * this function is called by the tty driver when it wants to stop the data 1490 * being read from the port. 1491 *****************************************************************************/ 1492 1493 static void mos7840_throttle(struct tty_struct *tty) 1494 { 1495 struct usb_serial_port *port = tty->driver_data; 1496 struct moschip_port *mos7840_port; 1497 int status; 1498 1499 if (mos7840_port_paranoia_check(port, __func__)) 1500 return; 1501 1502 mos7840_port = mos7840_get_port_private(port); 1503 1504 if (mos7840_port == NULL) 1505 return; 1506 1507 if (!mos7840_port->open) { 1508 dev_dbg(&port->dev, "%s", "port not opened\n"); 1509 return; 1510 } 1511 1512 /* if we are implementing XON/XOFF, send the stop character */ 1513 if (I_IXOFF(tty)) { 1514 unsigned char stop_char = STOP_CHAR(tty); 1515 status = mos7840_write(tty, port, &stop_char, 1); 1516 if (status <= 0) 1517 return; 1518 } 1519 /* if we are implementing RTS/CTS, toggle that line */ 1520 if (tty->termios.c_cflag & CRTSCTS) { 1521 mos7840_port->shadowMCR &= ~MCR_RTS; 1522 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1523 mos7840_port->shadowMCR); 1524 if (status < 0) 1525 return; 1526 } 1527 } 1528 1529 /***************************************************************************** 1530 * mos7840_unthrottle 1531 * this function is called by the tty driver when it wants to resume 1532 * the data being read from the port (called after mos7840_throttle is 1533 * called) 1534 *****************************************************************************/ 1535 static void mos7840_unthrottle(struct tty_struct *tty) 1536 { 1537 struct usb_serial_port *port = tty->driver_data; 1538 int status; 1539 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1540 1541 if (mos7840_port_paranoia_check(port, __func__)) 1542 return; 1543 1544 if (mos7840_port == NULL) 1545 return; 1546 1547 if (!mos7840_port->open) { 1548 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1549 return; 1550 } 1551 1552 /* if we are implementing XON/XOFF, send the start character */ 1553 if (I_IXOFF(tty)) { 1554 unsigned char start_char = START_CHAR(tty); 1555 status = mos7840_write(tty, port, &start_char, 1); 1556 if (status <= 0) 1557 return; 1558 } 1559 1560 /* if we are implementing RTS/CTS, toggle that line */ 1561 if (tty->termios.c_cflag & CRTSCTS) { 1562 mos7840_port->shadowMCR |= MCR_RTS; 1563 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1564 mos7840_port->shadowMCR); 1565 if (status < 0) 1566 return; 1567 } 1568 } 1569 1570 static int mos7840_tiocmget(struct tty_struct *tty) 1571 { 1572 struct usb_serial_port *port = tty->driver_data; 1573 struct moschip_port *mos7840_port; 1574 unsigned int result; 1575 __u16 msr; 1576 __u16 mcr; 1577 int status; 1578 mos7840_port = mos7840_get_port_private(port); 1579 1580 if (mos7840_port == NULL) 1581 return -ENODEV; 1582 1583 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1584 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1585 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1586 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1587 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1588 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1589 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1590 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1591 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1592 1593 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1594 1595 return result; 1596 } 1597 1598 static int mos7840_tiocmset(struct tty_struct *tty, 1599 unsigned int set, unsigned int clear) 1600 { 1601 struct usb_serial_port *port = tty->driver_data; 1602 struct moschip_port *mos7840_port; 1603 unsigned int mcr; 1604 int status; 1605 1606 mos7840_port = mos7840_get_port_private(port); 1607 1608 if (mos7840_port == NULL) 1609 return -ENODEV; 1610 1611 /* FIXME: What locks the port registers ? */ 1612 mcr = mos7840_port->shadowMCR; 1613 if (clear & TIOCM_RTS) 1614 mcr &= ~MCR_RTS; 1615 if (clear & TIOCM_DTR) 1616 mcr &= ~MCR_DTR; 1617 if (clear & TIOCM_LOOP) 1618 mcr &= ~MCR_LOOPBACK; 1619 1620 if (set & TIOCM_RTS) 1621 mcr |= MCR_RTS; 1622 if (set & TIOCM_DTR) 1623 mcr |= MCR_DTR; 1624 if (set & TIOCM_LOOP) 1625 mcr |= MCR_LOOPBACK; 1626 1627 mos7840_port->shadowMCR = mcr; 1628 1629 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1630 if (status < 0) { 1631 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1632 return status; 1633 } 1634 1635 return 0; 1636 } 1637 1638 /***************************************************************************** 1639 * mos7840_calc_baud_rate_divisor 1640 * this function calculates the proper baud rate divisor for the specified 1641 * baud rate. 1642 *****************************************************************************/ 1643 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1644 int baudRate, int *divisor, 1645 __u16 *clk_sel_val) 1646 { 1647 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1648 1649 if (baudRate <= 115200) { 1650 *divisor = 115200 / baudRate; 1651 *clk_sel_val = 0x0; 1652 } 1653 if ((baudRate > 115200) && (baudRate <= 230400)) { 1654 *divisor = 230400 / baudRate; 1655 *clk_sel_val = 0x10; 1656 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1657 *divisor = 403200 / baudRate; 1658 *clk_sel_val = 0x20; 1659 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1660 *divisor = 460800 / baudRate; 1661 *clk_sel_val = 0x30; 1662 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1663 *divisor = 806400 / baudRate; 1664 *clk_sel_val = 0x40; 1665 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1666 *divisor = 921600 / baudRate; 1667 *clk_sel_val = 0x50; 1668 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1669 *divisor = 1572864 / baudRate; 1670 *clk_sel_val = 0x60; 1671 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1672 *divisor = 3145728 / baudRate; 1673 *clk_sel_val = 0x70; 1674 } 1675 return 0; 1676 1677 #ifdef NOTMCS7840 1678 1679 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1680 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1681 *divisor = mos7840_divisor_table[i].Divisor; 1682 return 0; 1683 } 1684 } 1685 1686 /* After trying for all the standard baud rates * 1687 * Try calculating the divisor for this baud rate */ 1688 1689 if (baudrate > 75 && baudrate < 230400) { 1690 /* get the divisor */ 1691 custom = (__u16) (230400L / baudrate); 1692 1693 /* Check for round off */ 1694 round1 = (__u16) (2304000L / baudrate); 1695 round = (__u16) (round1 - (custom * 10)); 1696 if (round > 4) 1697 custom++; 1698 *divisor = custom; 1699 1700 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1701 return 0; 1702 } 1703 1704 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1705 return -1; 1706 #endif 1707 } 1708 1709 /***************************************************************************** 1710 * mos7840_send_cmd_write_baud_rate 1711 * this function sends the proper command to change the baud rate of the 1712 * specified port. 1713 *****************************************************************************/ 1714 1715 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1716 int baudRate) 1717 { 1718 int divisor = 0; 1719 int status; 1720 __u16 Data; 1721 unsigned char number; 1722 __u16 clk_sel_val; 1723 struct usb_serial_port *port; 1724 1725 if (mos7840_port == NULL) 1726 return -1; 1727 1728 port = mos7840_port->port; 1729 if (mos7840_port_paranoia_check(port, __func__)) 1730 return -1; 1731 1732 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1733 return -1; 1734 1735 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1736 1737 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__, 1738 mos7840_port->port->number, baudRate); 1739 /* reset clk_uart_sel in spregOffset */ 1740 if (baudRate > 115200) { 1741 #ifdef HW_flow_control 1742 /* NOTE: need to see the pther register to modify */ 1743 /* setting h/w flow control bit to 1 */ 1744 Data = 0x2b; 1745 mos7840_port->shadowMCR = Data; 1746 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1747 Data); 1748 if (status < 0) { 1749 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1750 return -1; 1751 } 1752 #endif 1753 1754 } else { 1755 #ifdef HW_flow_control 1756 /* setting h/w flow control bit to 0 */ 1757 Data = 0xb; 1758 mos7840_port->shadowMCR = Data; 1759 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1760 Data); 1761 if (status < 0) { 1762 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1763 return -1; 1764 } 1765 #endif 1766 1767 } 1768 1769 if (1) { /* baudRate <= 115200) */ 1770 clk_sel_val = 0x0; 1771 Data = 0x0; 1772 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1773 &clk_sel_val); 1774 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1775 &Data); 1776 if (status < 0) { 1777 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1778 return -1; 1779 } 1780 Data = (Data & 0x8f) | clk_sel_val; 1781 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1782 Data); 1783 if (status < 0) { 1784 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1785 return -1; 1786 } 1787 /* Calculate the Divisor */ 1788 1789 if (status) { 1790 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1791 return status; 1792 } 1793 /* Enable access to divisor latch */ 1794 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1795 mos7840_port->shadowLCR = Data; 1796 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1797 1798 /* Write the divisor */ 1799 Data = (unsigned char)(divisor & 0xff); 1800 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1801 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1802 1803 Data = (unsigned char)((divisor & 0xff00) >> 8); 1804 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1805 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1806 1807 /* Disable access to divisor latch */ 1808 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1809 mos7840_port->shadowLCR = Data; 1810 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1811 1812 } 1813 return status; 1814 } 1815 1816 /***************************************************************************** 1817 * mos7840_change_port_settings 1818 * This routine is called to set the UART on the device to match 1819 * the specified new settings. 1820 *****************************************************************************/ 1821 1822 static void mos7840_change_port_settings(struct tty_struct *tty, 1823 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1824 { 1825 int baud; 1826 unsigned cflag; 1827 unsigned iflag; 1828 __u8 lData; 1829 __u8 lParity; 1830 __u8 lStop; 1831 int status; 1832 __u16 Data; 1833 struct usb_serial_port *port; 1834 struct usb_serial *serial; 1835 1836 if (mos7840_port == NULL) 1837 return; 1838 1839 port = mos7840_port->port; 1840 1841 if (mos7840_port_paranoia_check(port, __func__)) 1842 return; 1843 1844 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1845 return; 1846 1847 serial = port->serial; 1848 1849 if (!mos7840_port->open) { 1850 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1851 return; 1852 } 1853 1854 lData = LCR_BITS_8; 1855 lStop = LCR_STOP_1; 1856 lParity = LCR_PAR_NONE; 1857 1858 cflag = tty->termios.c_cflag; 1859 iflag = tty->termios.c_iflag; 1860 1861 /* Change the number of bits */ 1862 if (cflag & CSIZE) { 1863 switch (cflag & CSIZE) { 1864 case CS5: 1865 lData = LCR_BITS_5; 1866 break; 1867 1868 case CS6: 1869 lData = LCR_BITS_6; 1870 break; 1871 1872 case CS7: 1873 lData = LCR_BITS_7; 1874 break; 1875 default: 1876 case CS8: 1877 lData = LCR_BITS_8; 1878 break; 1879 } 1880 } 1881 /* Change the Parity bit */ 1882 if (cflag & PARENB) { 1883 if (cflag & PARODD) { 1884 lParity = LCR_PAR_ODD; 1885 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1886 } else { 1887 lParity = LCR_PAR_EVEN; 1888 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1889 } 1890 1891 } else { 1892 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1893 } 1894 1895 if (cflag & CMSPAR) 1896 lParity = lParity | 0x20; 1897 1898 /* Change the Stop bit */ 1899 if (cflag & CSTOPB) { 1900 lStop = LCR_STOP_2; 1901 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1902 } else { 1903 lStop = LCR_STOP_1; 1904 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1905 } 1906 1907 /* Update the LCR with the correct value */ 1908 mos7840_port->shadowLCR &= 1909 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1910 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1911 1912 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1913 mos7840_port->shadowLCR); 1914 /* Disable Interrupts */ 1915 Data = 0x00; 1916 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1917 1918 Data = 0x00; 1919 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1920 1921 Data = 0xcf; 1922 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1923 1924 /* Send the updated LCR value to the mos7840 */ 1925 Data = mos7840_port->shadowLCR; 1926 1927 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1928 1929 Data = 0x00b; 1930 mos7840_port->shadowMCR = Data; 1931 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1932 Data = 0x00b; 1933 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1934 1935 /* set up the MCR register and send it to the mos7840 */ 1936 1937 mos7840_port->shadowMCR = MCR_MASTER_IE; 1938 if (cflag & CBAUD) 1939 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1940 1941 if (cflag & CRTSCTS) 1942 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1943 else 1944 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1945 1946 Data = mos7840_port->shadowMCR; 1947 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1948 1949 /* Determine divisor based on baud rate */ 1950 baud = tty_get_baud_rate(tty); 1951 1952 if (!baud) { 1953 /* pick a default, any default... */ 1954 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1955 baud = 9600; 1956 } 1957 1958 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1959 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1960 1961 /* Enable Interrupts */ 1962 Data = 0x0c; 1963 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1964 1965 if (mos7840_port->read_urb_busy == false) { 1966 mos7840_port->read_urb_busy = true; 1967 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1968 if (status) { 1969 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1970 status); 1971 mos7840_port->read_urb_busy = false; 1972 } 1973 } 1974 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1975 mos7840_port->shadowLCR); 1976 } 1977 1978 /***************************************************************************** 1979 * mos7840_set_termios 1980 * this function is called by the tty driver when it wants to change 1981 * the termios structure 1982 *****************************************************************************/ 1983 1984 static void mos7840_set_termios(struct tty_struct *tty, 1985 struct usb_serial_port *port, 1986 struct ktermios *old_termios) 1987 { 1988 int status; 1989 unsigned int cflag; 1990 struct usb_serial *serial; 1991 struct moschip_port *mos7840_port; 1992 1993 if (mos7840_port_paranoia_check(port, __func__)) 1994 return; 1995 1996 serial = port->serial; 1997 1998 if (mos7840_serial_paranoia_check(serial, __func__)) 1999 return; 2000 2001 mos7840_port = mos7840_get_port_private(port); 2002 2003 if (mos7840_port == NULL) 2004 return; 2005 2006 if (!mos7840_port->open) { 2007 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 2008 return; 2009 } 2010 2011 dev_dbg(&port->dev, "%s", "setting termios - \n"); 2012 2013 cflag = tty->termios.c_cflag; 2014 2015 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 2016 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 2017 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 2018 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2019 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); 2020 2021 /* change the port settings to the new ones specified */ 2022 2023 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2024 2025 if (!mos7840_port->read_urb) { 2026 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 2027 return; 2028 } 2029 2030 if (mos7840_port->read_urb_busy == false) { 2031 mos7840_port->read_urb_busy = true; 2032 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2033 if (status) { 2034 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2035 status); 2036 mos7840_port->read_urb_busy = false; 2037 } 2038 } 2039 } 2040 2041 /***************************************************************************** 2042 * mos7840_get_lsr_info - get line status register info 2043 * 2044 * Purpose: Let user call ioctl() to get info when the UART physically 2045 * is emptied. On bus types like RS485, the transmitter must 2046 * release the bus after transmitting. This must be done when 2047 * the transmit shift register is empty, not be done when the 2048 * transmit holding register is empty. This functionality 2049 * allows an RS485 driver to be written in user space. 2050 *****************************************************************************/ 2051 2052 static int mos7840_get_lsr_info(struct tty_struct *tty, 2053 unsigned int __user *value) 2054 { 2055 int count; 2056 unsigned int result = 0; 2057 2058 count = mos7840_chars_in_buffer(tty); 2059 if (count == 0) 2060 result = TIOCSER_TEMT; 2061 2062 if (copy_to_user(value, &result, sizeof(int))) 2063 return -EFAULT; 2064 return 0; 2065 } 2066 2067 /***************************************************************************** 2068 * mos7840_get_serial_info 2069 * function to get information about serial port 2070 *****************************************************************************/ 2071 2072 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2073 struct serial_struct __user *retinfo) 2074 { 2075 struct serial_struct tmp; 2076 2077 if (mos7840_port == NULL) 2078 return -1; 2079 2080 if (!retinfo) 2081 return -EFAULT; 2082 2083 memset(&tmp, 0, sizeof(tmp)); 2084 2085 tmp.type = PORT_16550A; 2086 tmp.line = mos7840_port->port->serial->minor; 2087 tmp.port = mos7840_port->port->number; 2088 tmp.irq = 0; 2089 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2090 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2091 tmp.baud_base = 9600; 2092 tmp.close_delay = 5 * HZ; 2093 tmp.closing_wait = 30 * HZ; 2094 2095 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2096 return -EFAULT; 2097 return 0; 2098 } 2099 2100 /***************************************************************************** 2101 * SerialIoctl 2102 * this function handles any ioctl calls to the driver 2103 *****************************************************************************/ 2104 2105 static int mos7840_ioctl(struct tty_struct *tty, 2106 unsigned int cmd, unsigned long arg) 2107 { 2108 struct usb_serial_port *port = tty->driver_data; 2109 void __user *argp = (void __user *)arg; 2110 struct moschip_port *mos7840_port; 2111 2112 if (mos7840_port_paranoia_check(port, __func__)) 2113 return -1; 2114 2115 mos7840_port = mos7840_get_port_private(port); 2116 2117 if (mos7840_port == NULL) 2118 return -1; 2119 2120 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); 2121 2122 switch (cmd) { 2123 /* return number of bytes available */ 2124 2125 case TIOCSERGETLSR: 2126 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2127 return mos7840_get_lsr_info(tty, argp); 2128 2129 case TIOCGSERIAL: 2130 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2131 return mos7840_get_serial_info(mos7840_port, argp); 2132 2133 case TIOCSSERIAL: 2134 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2135 break; 2136 default: 2137 break; 2138 } 2139 return -ENOIOCTLCMD; 2140 } 2141 2142 static int mos7810_check(struct usb_serial *serial) 2143 { 2144 int i, pass_count = 0; 2145 u8 *buf; 2146 __u16 data = 0, mcr_data = 0; 2147 __u16 test_pattern = 0x55AA; 2148 int res; 2149 2150 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2151 if (!buf) 2152 return 0; /* failed to identify 7810 */ 2153 2154 /* Store MCR setting */ 2155 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2156 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2157 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2158 if (res == VENDOR_READ_LENGTH) 2159 mcr_data = *buf; 2160 2161 for (i = 0; i < 16; i++) { 2162 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2163 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2164 MCS_WRREQ, MCS_WR_RTYPE, 2165 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2166 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2167 2168 /* Read the test pattern back */ 2169 res = usb_control_msg(serial->dev, 2170 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2171 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2172 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2173 if (res == VENDOR_READ_LENGTH) 2174 data = *buf; 2175 2176 /* If this is a MCS7810 device, both test patterns must match */ 2177 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2178 break; 2179 2180 pass_count++; 2181 } 2182 2183 /* Restore MCR setting */ 2184 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2185 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2186 0, MOS_WDR_TIMEOUT); 2187 2188 kfree(buf); 2189 2190 if (pass_count == 16) 2191 return 1; 2192 2193 return 0; 2194 } 2195 2196 static int mos7840_calc_num_ports(struct usb_serial *serial) 2197 { 2198 __u16 data = 0x00; 2199 u8 *buf; 2200 int mos7840_num_ports; 2201 2202 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2203 if (buf) { 2204 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2205 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2206 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2207 data = *buf; 2208 kfree(buf); 2209 } 2210 2211 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 || 2212 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) { 2213 device_type = serial->dev->descriptor.idProduct; 2214 } else { 2215 /* For a MCS7840 device GPIO0 must be set to 1 */ 2216 if ((data & 0x01) == 1) 2217 device_type = MOSCHIP_DEVICE_ID_7840; 2218 else if (mos7810_check(serial)) 2219 device_type = MOSCHIP_DEVICE_ID_7810; 2220 else 2221 device_type = MOSCHIP_DEVICE_ID_7820; 2222 } 2223 2224 mos7840_num_ports = (device_type >> 4) & 0x000F; 2225 serial->num_bulk_in = mos7840_num_ports; 2226 serial->num_bulk_out = mos7840_num_ports; 2227 serial->num_ports = mos7840_num_ports; 2228 2229 return mos7840_num_ports; 2230 } 2231 2232 static int mos7840_port_probe(struct usb_serial_port *port) 2233 { 2234 struct usb_serial *serial = port->serial; 2235 struct moschip_port *mos7840_port; 2236 int status; 2237 int pnum; 2238 __u16 Data; 2239 2240 /* we set up the pointers to the endpoints in the mos7840_open * 2241 * function, as the structures aren't created yet. */ 2242 2243 pnum = port->number - serial->minor; 2244 2245 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2246 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2247 if (mos7840_port == NULL) { 2248 dev_err(&port->dev, "%s - Out of memory\n", __func__); 2249 return -ENOMEM; 2250 } 2251 2252 /* Initialize all port interrupt end point to port 0 int 2253 * endpoint. Our device has only one interrupt end point 2254 * common to all port */ 2255 2256 mos7840_port->port = port; 2257 mos7840_set_port_private(port, mos7840_port); 2258 spin_lock_init(&mos7840_port->pool_lock); 2259 2260 /* minor is not initialised until later by 2261 * usb-serial.c:get_free_serial() and cannot therefore be used 2262 * to index device instances */ 2263 mos7840_port->port_num = pnum + 1; 2264 dev_dbg(&port->dev, "port->number = %d\n", port->number); 2265 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor); 2266 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2267 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor); 2268 2269 if (mos7840_port->port_num == 1) { 2270 mos7840_port->SpRegOffset = 0x0; 2271 mos7840_port->ControlRegOffset = 0x1; 2272 mos7840_port->DcrRegOffset = 0x4; 2273 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2274 mos7840_port->SpRegOffset = 0x8; 2275 mos7840_port->ControlRegOffset = 0x9; 2276 mos7840_port->DcrRegOffset = 0x16; 2277 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2278 mos7840_port->SpRegOffset = 0xa; 2279 mos7840_port->ControlRegOffset = 0xb; 2280 mos7840_port->DcrRegOffset = 0x19; 2281 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2282 mos7840_port->SpRegOffset = 0xa; 2283 mos7840_port->ControlRegOffset = 0xb; 2284 mos7840_port->DcrRegOffset = 0x19; 2285 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2286 mos7840_port->SpRegOffset = 0xc; 2287 mos7840_port->ControlRegOffset = 0xd; 2288 mos7840_port->DcrRegOffset = 0x1c; 2289 } 2290 mos7840_dump_serial_port(port, mos7840_port); 2291 mos7840_set_port_private(port, mos7840_port); 2292 2293 /* enable rx_disable bit in control register */ 2294 status = mos7840_get_reg_sync(port, 2295 mos7840_port->ControlRegOffset, &Data); 2296 if (status < 0) { 2297 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2298 goto out; 2299 } else 2300 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2301 Data |= 0x08; /* setting driver done bit */ 2302 Data |= 0x04; /* sp1_bit to have cts change reflect in 2303 modem status reg */ 2304 2305 /* Data |= 0x20; //rx_disable bit */ 2306 status = mos7840_set_reg_sync(port, 2307 mos7840_port->ControlRegOffset, Data); 2308 if (status < 0) { 2309 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2310 goto out; 2311 } else 2312 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2313 2314 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2315 and 0x24 in DCR3 */ 2316 Data = 0x01; 2317 status = mos7840_set_reg_sync(port, 2318 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2319 if (status < 0) { 2320 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2321 goto out; 2322 } else 2323 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2324 2325 Data = 0x05; 2326 status = mos7840_set_reg_sync(port, 2327 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2328 if (status < 0) { 2329 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2330 goto out; 2331 } else 2332 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2333 2334 Data = 0x24; 2335 status = mos7840_set_reg_sync(port, 2336 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2337 if (status < 0) { 2338 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2339 goto out; 2340 } else 2341 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2342 2343 /* write values in clkstart0x0 and clkmulti 0x20 */ 2344 Data = 0x0; 2345 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2346 if (status < 0) { 2347 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2348 goto out; 2349 } else 2350 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2351 2352 Data = 0x20; 2353 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2354 if (status < 0) { 2355 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2356 goto error; 2357 } else 2358 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2359 2360 /* write value 0x0 to scratchpad register */ 2361 Data = 0x00; 2362 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2363 if (status < 0) { 2364 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2365 goto out; 2366 } else 2367 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2368 2369 /* Zero Length flag register */ 2370 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2371 Data = 0xff; 2372 status = mos7840_set_reg_sync(port, 2373 (__u16) (ZLP_REG1 + 2374 ((__u16)mos7840_port->port_num)), Data); 2375 dev_dbg(&port->dev, "ZLIP offset %x\n", 2376 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2377 if (status < 0) { 2378 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2379 goto out; 2380 } else 2381 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2382 } else { 2383 Data = 0xff; 2384 status = mos7840_set_reg_sync(port, 2385 (__u16) (ZLP_REG1 + 2386 ((__u16)mos7840_port->port_num) - 0x1), Data); 2387 dev_dbg(&port->dev, "ZLIP offset %x\n", 2388 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2389 if (status < 0) { 2390 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2391 goto out; 2392 } else 2393 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2394 2395 } 2396 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2397 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2398 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2399 GFP_KERNEL); 2400 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2401 !mos7840_port->dr) { 2402 status = -ENOMEM; 2403 goto error; 2404 } 2405 2406 mos7840_port->has_led = false; 2407 2408 /* Initialize LED timers */ 2409 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2410 mos7840_port->has_led = true; 2411 2412 init_timer(&mos7840_port->led_timer1); 2413 mos7840_port->led_timer1.function = mos7840_led_off; 2414 mos7840_port->led_timer1.expires = 2415 jiffies + msecs_to_jiffies(LED_ON_MS); 2416 mos7840_port->led_timer1.data = (unsigned long)mos7840_port; 2417 2418 init_timer(&mos7840_port->led_timer2); 2419 mos7840_port->led_timer2.function = mos7840_led_flag_off; 2420 mos7840_port->led_timer2.expires = 2421 jiffies + msecs_to_jiffies(LED_OFF_MS); 2422 mos7840_port->led_timer2.data = (unsigned long)mos7840_port; 2423 2424 mos7840_port->led_flag = false; 2425 2426 /* Turn off LED */ 2427 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2428 } 2429 out: 2430 if (pnum == serial->num_ports - 1) { 2431 /* Zero Length flag enable */ 2432 Data = 0x0f; 2433 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2434 if (status < 0) { 2435 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2436 goto error; 2437 } else 2438 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2439 2440 /* setting configuration feature to one */ 2441 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2442 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2443 MOS_WDR_TIMEOUT); 2444 } 2445 return 0; 2446 error: 2447 kfree(mos7840_port->dr); 2448 kfree(mos7840_port->ctrl_buf); 2449 usb_free_urb(mos7840_port->control_urb); 2450 kfree(mos7840_port); 2451 2452 return status; 2453 } 2454 2455 static int mos7840_port_remove(struct usb_serial_port *port) 2456 { 2457 struct moschip_port *mos7840_port; 2458 2459 mos7840_port = mos7840_get_port_private(port); 2460 2461 if (mos7840_port->has_led) { 2462 /* Turn off LED */ 2463 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2464 2465 del_timer_sync(&mos7840_port->led_timer1); 2466 del_timer_sync(&mos7840_port->led_timer2); 2467 } 2468 usb_kill_urb(mos7840_port->control_urb); 2469 usb_free_urb(mos7840_port->control_urb); 2470 kfree(mos7840_port->ctrl_buf); 2471 kfree(mos7840_port->dr); 2472 kfree(mos7840_port); 2473 2474 return 0; 2475 } 2476 2477 static struct usb_serial_driver moschip7840_4port_device = { 2478 .driver = { 2479 .owner = THIS_MODULE, 2480 .name = "mos7840", 2481 }, 2482 .description = DRIVER_DESC, 2483 .id_table = id_table, 2484 .num_ports = 4, 2485 .open = mos7840_open, 2486 .close = mos7840_close, 2487 .write = mos7840_write, 2488 .write_room = mos7840_write_room, 2489 .chars_in_buffer = mos7840_chars_in_buffer, 2490 .throttle = mos7840_throttle, 2491 .unthrottle = mos7840_unthrottle, 2492 .calc_num_ports = mos7840_calc_num_ports, 2493 #ifdef MCSSerialProbe 2494 .probe = mos7840_serial_probe, 2495 #endif 2496 .ioctl = mos7840_ioctl, 2497 .set_termios = mos7840_set_termios, 2498 .break_ctl = mos7840_break, 2499 .tiocmget = mos7840_tiocmget, 2500 .tiocmset = mos7840_tiocmset, 2501 .tiocmiwait = usb_serial_generic_tiocmiwait, 2502 .get_icount = usb_serial_generic_get_icount, 2503 .port_probe = mos7840_port_probe, 2504 .port_remove = mos7840_port_remove, 2505 .read_bulk_callback = mos7840_bulk_in_callback, 2506 .read_int_callback = mos7840_interrupt_callback, 2507 }; 2508 2509 static struct usb_serial_driver * const serial_drivers[] = { 2510 &moschip7840_4port_device, NULL 2511 }; 2512 2513 module_usb_serial_driver(serial_drivers, id_table); 2514 2515 MODULE_DESCRIPTION(DRIVER_DESC); 2516 MODULE_LICENSE("GPL"); 2517