1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Clean ups from Moschip version and a few ioctl implementations by: 4 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 5 * 6 * Originally based on drivers/usb/serial/io_edgeport.c which is: 7 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 8 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 9 * 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/errno.h> 14 #include <linux/slab.h> 15 #include <linux/tty.h> 16 #include <linux/tty_flip.h> 17 #include <linux/module.h> 18 #include <linux/serial.h> 19 #include <linux/usb.h> 20 #include <linux/usb/serial.h> 21 #include <linux/uaccess.h> 22 23 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 24 25 /* 26 * 16C50 UART register defines 27 */ 28 29 #define LCR_BITS_5 0x00 /* 5 bits/char */ 30 #define LCR_BITS_6 0x01 /* 6 bits/char */ 31 #define LCR_BITS_7 0x02 /* 7 bits/char */ 32 #define LCR_BITS_8 0x03 /* 8 bits/char */ 33 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 34 35 #define LCR_STOP_1 0x00 /* 1 stop bit */ 36 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 37 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 38 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 39 40 #define LCR_PAR_NONE 0x00 /* No parity */ 41 #define LCR_PAR_ODD 0x08 /* Odd parity */ 42 #define LCR_PAR_EVEN 0x18 /* Even parity */ 43 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 44 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 45 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 46 47 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 48 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 49 50 #define MCR_DTR 0x01 /* Assert DTR */ 51 #define MCR_RTS 0x02 /* Assert RTS */ 52 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 53 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 54 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 55 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 56 57 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 58 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 59 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 60 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 61 62 /* 63 * Defines used for sending commands to port 64 */ 65 66 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ 67 68 /* Requests */ 69 #define MCS_RD_RTYPE 0xC0 70 #define MCS_WR_RTYPE 0x40 71 #define MCS_RDREQ 0x0D 72 #define MCS_WRREQ 0x0E 73 #define VENDOR_READ_LENGTH (0x01) 74 75 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 76 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 77 78 /* 79 * Vendor id and device id defines 80 * 81 * NOTE: Do not add new defines, add entries directly to the id_table instead. 82 */ 83 #define USB_VENDOR_ID_BANDB 0x0856 84 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 85 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 86 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 87 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 88 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 89 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 90 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 91 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 92 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 93 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 94 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 95 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 96 97 /* Interrupt Routine Defines */ 98 99 #define SERIAL_IIR_RLS 0x06 100 #define SERIAL_IIR_MS 0x00 101 102 /* 103 * Emulation of the bit mask on the LINE STATUS REGISTER. 104 */ 105 #define SERIAL_LSR_DR 0x0001 106 #define SERIAL_LSR_OE 0x0002 107 #define SERIAL_LSR_PE 0x0004 108 #define SERIAL_LSR_FE 0x0008 109 #define SERIAL_LSR_BI 0x0010 110 111 #define MOS_MSR_DELTA_CTS 0x10 112 #define MOS_MSR_DELTA_DSR 0x20 113 #define MOS_MSR_DELTA_RI 0x40 114 #define MOS_MSR_DELTA_CD 0x80 115 116 /* Serial Port register Address */ 117 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 118 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 119 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 120 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 121 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 122 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 123 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 124 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 125 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 126 127 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 128 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 129 #define GPIO_REGISTER ((__u16)(0x07)) 130 131 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 132 133 /* 134 * URB POOL related defines 135 */ 136 #define NUM_URBS 16 /* URB Count */ 137 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 138 139 /* LED on/off milliseconds*/ 140 #define LED_ON_MS 500 141 #define LED_OFF_MS 500 142 143 enum mos7840_flag { 144 MOS7840_FLAG_LED_BUSY, 145 }; 146 147 #define MCS_PORT_MASK GENMASK(2, 0) 148 #define MCS_PORTS(nr) ((nr) & MCS_PORT_MASK) 149 #define MCS_LED BIT(3) 150 151 #define MCS_DEVICE(vid, pid, flags) \ 152 USB_DEVICE((vid), (pid)), .driver_info = (flags) 153 154 static const struct usb_device_id id_table[] = { 155 { MCS_DEVICE(0x0557, 0x2011, MCS_PORTS(4)) }, /* ATEN UC2324 */ 156 { MCS_DEVICE(0x0557, 0x7820, MCS_PORTS(2)) }, /* ATEN UC2322 */ 157 { MCS_DEVICE(0x110a, 0x2210, MCS_PORTS(2)) }, /* Moxa UPort 2210 */ 158 { MCS_DEVICE(0x9710, 0x7810, MCS_PORTS(1) | MCS_LED) }, /* ASIX MCS7810 */ 159 { MCS_DEVICE(0x9710, 0x7820, MCS_PORTS(2)) }, /* MosChip MCS7820 */ 160 { MCS_DEVICE(0x9710, 0x7840, MCS_PORTS(4)) }, /* MosChip MCS7840 */ 161 { MCS_DEVICE(0x9710, 0x7843, MCS_PORTS(3)) }, /* ASIX MCS7840 3 port */ 162 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2) }, 163 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P) }, 164 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4) }, 165 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P) }, 166 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2) }, 167 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4) }, 168 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2) }, 169 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4) }, 170 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2) }, 171 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P) }, 172 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4) }, 173 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P) }, 174 {} /* terminating entry */ 175 }; 176 MODULE_DEVICE_TABLE(usb, id_table); 177 178 /* This structure holds all of the local port information */ 179 180 struct moschip_port { 181 int port_num; /*Actual port number in the device(1,2,etc) */ 182 struct urb *read_urb; /* read URB for this port */ 183 __u8 shadowLCR; /* last LCR value received */ 184 __u8 shadowMCR; /* last MCR value received */ 185 struct usb_serial_port *port; /* loop back to the owner of this object */ 186 187 /* Offsets */ 188 __u8 SpRegOffset; 189 __u8 ControlRegOffset; 190 __u8 DcrRegOffset; 191 192 spinlock_t pool_lock; 193 struct urb *write_urb_pool[NUM_URBS]; 194 char busy[NUM_URBS]; 195 bool read_urb_busy; 196 197 /* For device(s) with LED indicator */ 198 bool has_led; 199 struct timer_list led_timer1; /* Timer for LED on */ 200 struct timer_list led_timer2; /* Timer for LED off */ 201 struct urb *led_urb; 202 struct usb_ctrlrequest *led_dr; 203 204 unsigned long flags; 205 }; 206 207 /* 208 * mos7840_set_reg_sync 209 * To set the Control register by calling usb_fill_control_urb function 210 * by passing usb_sndctrlpipe function as parameter. 211 */ 212 213 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 214 __u16 val) 215 { 216 struct usb_device *dev = port->serial->dev; 217 val = val & 0x00ff; 218 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 219 220 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 221 MCS_WR_RTYPE, val, reg, NULL, 0, 222 MOS_WDR_TIMEOUT); 223 } 224 225 /* 226 * mos7840_get_reg_sync 227 * To set the Uart register by calling usb_fill_control_urb function by 228 * passing usb_rcvctrlpipe function as parameter. 229 */ 230 231 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 232 __u16 *val) 233 { 234 struct usb_device *dev = port->serial->dev; 235 int ret = 0; 236 u8 *buf; 237 238 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 239 if (!buf) 240 return -ENOMEM; 241 242 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 243 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 244 MOS_WDR_TIMEOUT); 245 if (ret < VENDOR_READ_LENGTH) { 246 if (ret >= 0) 247 ret = -EIO; 248 goto out; 249 } 250 251 *val = buf[0]; 252 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 253 out: 254 kfree(buf); 255 return ret; 256 } 257 258 /* 259 * mos7840_set_uart_reg 260 * To set the Uart register by calling usb_fill_control_urb function by 261 * passing usb_sndctrlpipe function as parameter. 262 */ 263 264 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 265 __u16 val) 266 { 267 268 struct usb_device *dev = port->serial->dev; 269 val = val & 0x00ff; 270 /* For the UART control registers, the application number need 271 to be Or'ed */ 272 if (port->serial->num_ports == 2 && port->port_number != 0) 273 val |= ((__u16)port->port_number + 2) << 8; 274 else 275 val |= ((__u16)port->port_number + 1) << 8; 276 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 277 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 278 MCS_WR_RTYPE, val, reg, NULL, 0, 279 MOS_WDR_TIMEOUT); 280 281 } 282 283 /* 284 * mos7840_get_uart_reg 285 * To set the Control register by calling usb_fill_control_urb function 286 * by passing usb_rcvctrlpipe function as parameter. 287 */ 288 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 289 __u16 *val) 290 { 291 struct usb_device *dev = port->serial->dev; 292 int ret = 0; 293 __u16 Wval; 294 u8 *buf; 295 296 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 297 if (!buf) 298 return -ENOMEM; 299 300 /* Wval is same as application number */ 301 if (port->serial->num_ports == 2 && port->port_number != 0) 302 Wval = ((__u16)port->port_number + 2) << 8; 303 else 304 Wval = ((__u16)port->port_number + 1) << 8; 305 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 306 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 307 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 308 MOS_WDR_TIMEOUT); 309 if (ret < VENDOR_READ_LENGTH) { 310 if (ret >= 0) 311 ret = -EIO; 312 goto out; 313 } 314 *val = buf[0]; 315 out: 316 kfree(buf); 317 return ret; 318 } 319 320 static void mos7840_dump_serial_port(struct usb_serial_port *port, 321 struct moschip_port *mos7840_port) 322 { 323 324 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 325 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 326 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 327 328 } 329 330 /************************************************************************/ 331 /************************************************************************/ 332 /* U S B C A L L B A C K F U N C T I O N S */ 333 /* U S B C A L L B A C K F U N C T I O N S */ 334 /************************************************************************/ 335 /************************************************************************/ 336 337 static void mos7840_set_led_callback(struct urb *urb) 338 { 339 switch (urb->status) { 340 case 0: 341 /* Success */ 342 break; 343 case -ECONNRESET: 344 case -ENOENT: 345 case -ESHUTDOWN: 346 /* This urb is terminated, clean up */ 347 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n", 348 __func__, urb->status); 349 break; 350 default: 351 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", 352 __func__, urb->status); 353 } 354 } 355 356 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 357 __u16 reg) 358 { 359 struct usb_device *dev = mcs->port->serial->dev; 360 struct usb_ctrlrequest *dr = mcs->led_dr; 361 362 dr->bRequestType = MCS_WR_RTYPE; 363 dr->bRequest = MCS_WRREQ; 364 dr->wValue = cpu_to_le16(wval); 365 dr->wIndex = cpu_to_le16(reg); 366 dr->wLength = cpu_to_le16(0); 367 368 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), 369 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 370 371 usb_submit_urb(mcs->led_urb, GFP_ATOMIC); 372 } 373 374 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 375 __u16 val) 376 { 377 struct usb_device *dev = port->serial->dev; 378 379 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 380 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 381 } 382 383 static void mos7840_led_off(struct timer_list *t) 384 { 385 struct moschip_port *mcs = timer_container_of(mcs, t, led_timer1); 386 387 /* Turn off LED */ 388 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 389 mod_timer(&mcs->led_timer2, 390 jiffies + msecs_to_jiffies(LED_OFF_MS)); 391 } 392 393 static void mos7840_led_flag_off(struct timer_list *t) 394 { 395 struct moschip_port *mcs = timer_container_of(mcs, t, led_timer2); 396 397 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags); 398 } 399 400 static void mos7840_led_activity(struct usb_serial_port *port) 401 { 402 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 403 404 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags)) 405 return; 406 407 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER); 408 mod_timer(&mos7840_port->led_timer1, 409 jiffies + msecs_to_jiffies(LED_ON_MS)); 410 } 411 412 /***************************************************************************** 413 * mos7840_bulk_in_callback 414 * this is the callback function for when we have received data on the 415 * bulk in endpoint. 416 *****************************************************************************/ 417 418 static void mos7840_bulk_in_callback(struct urb *urb) 419 { 420 struct moschip_port *mos7840_port = urb->context; 421 struct usb_serial_port *port = mos7840_port->port; 422 int retval; 423 unsigned char *data; 424 int status = urb->status; 425 426 if (status) { 427 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 428 mos7840_port->read_urb_busy = false; 429 return; 430 } 431 432 data = urb->transfer_buffer; 433 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 434 435 if (urb->actual_length) { 436 struct tty_port *tport = &mos7840_port->port->port; 437 tty_insert_flip_string(tport, data, urb->actual_length); 438 tty_flip_buffer_push(tport); 439 port->icount.rx += urb->actual_length; 440 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); 441 } 442 443 if (mos7840_port->has_led) 444 mos7840_led_activity(port); 445 446 mos7840_port->read_urb_busy = true; 447 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 448 449 if (retval) { 450 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 451 mos7840_port->read_urb_busy = false; 452 } 453 } 454 455 /***************************************************************************** 456 * mos7840_bulk_out_data_callback 457 * this is the callback function for when we have finished sending 458 * serial data on the bulk out endpoint. 459 *****************************************************************************/ 460 461 static void mos7840_bulk_out_data_callback(struct urb *urb) 462 { 463 struct moschip_port *mos7840_port = urb->context; 464 struct usb_serial_port *port = mos7840_port->port; 465 int status = urb->status; 466 unsigned long flags; 467 int i; 468 469 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 470 for (i = 0; i < NUM_URBS; i++) { 471 if (urb == mos7840_port->write_urb_pool[i]) { 472 mos7840_port->busy[i] = 0; 473 break; 474 } 475 } 476 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 477 478 if (status) { 479 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 480 return; 481 } 482 483 tty_port_tty_wakeup(&port->port); 484 485 } 486 487 /************************************************************************/ 488 /* 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 */ 489 /************************************************************************/ 490 491 /***************************************************************************** 492 * mos7840_open 493 * this function is called by the tty driver when a port is opened 494 * If successful, we return 0 495 * Otherwise we return a negative error number. 496 *****************************************************************************/ 497 498 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 499 { 500 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 501 struct usb_serial *serial = port->serial; 502 int response; 503 int j; 504 struct urb *urb; 505 __u16 Data; 506 int status; 507 508 usb_clear_halt(serial->dev, port->write_urb->pipe); 509 usb_clear_halt(serial->dev, port->read_urb->pipe); 510 511 /* Initialising the write urb pool */ 512 for (j = 0; j < NUM_URBS; ++j) { 513 urb = usb_alloc_urb(0, GFP_KERNEL); 514 mos7840_port->write_urb_pool[j] = urb; 515 if (!urb) 516 continue; 517 518 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 519 GFP_KERNEL); 520 if (!urb->transfer_buffer) { 521 usb_free_urb(urb); 522 mos7840_port->write_urb_pool[j] = NULL; 523 continue; 524 } 525 } 526 527 /***************************************************************************** 528 * Initialize MCS7840 -- Write Init values to corresponding Registers 529 * 530 * Register Index 531 * 1 : IER 532 * 2 : FCR 533 * 3 : LCR 534 * 4 : MCR 535 * 536 * 0x08 : SP1/2 Control Reg 537 *****************************************************************************/ 538 539 /* NEED to check the following Block */ 540 541 Data = 0x0; 542 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 543 if (status < 0) { 544 dev_dbg(&port->dev, "Reading Spreg failed\n"); 545 goto err; 546 } 547 Data |= 0x80; 548 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 549 if (status < 0) { 550 dev_dbg(&port->dev, "writing Spreg failed\n"); 551 goto err; 552 } 553 554 Data &= ~0x80; 555 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 556 if (status < 0) { 557 dev_dbg(&port->dev, "writing Spreg failed\n"); 558 goto err; 559 } 560 /* End of block to be checked */ 561 562 Data = 0x0; 563 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 564 &Data); 565 if (status < 0) { 566 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 567 goto err; 568 } 569 Data |= 0x08; /* Driver done bit */ 570 Data |= 0x20; /* rx_disable */ 571 status = mos7840_set_reg_sync(port, 572 mos7840_port->ControlRegOffset, Data); 573 if (status < 0) { 574 dev_dbg(&port->dev, "writing Controlreg failed\n"); 575 goto err; 576 } 577 /* do register settings here */ 578 /* Set all regs to the device default values. */ 579 /*********************************** 580 * First Disable all interrupts. 581 ***********************************/ 582 Data = 0x00; 583 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 584 if (status < 0) { 585 dev_dbg(&port->dev, "disabling interrupts failed\n"); 586 goto err; 587 } 588 /* Set FIFO_CONTROL_REGISTER to the default value */ 589 Data = 0x00; 590 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 591 if (status < 0) { 592 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 593 goto err; 594 } 595 596 Data = 0xcf; 597 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 598 if (status < 0) { 599 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 600 goto err; 601 } 602 603 Data = 0x03; 604 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 605 mos7840_port->shadowLCR = Data; 606 607 Data = 0x0b; 608 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 609 mos7840_port->shadowMCR = Data; 610 611 Data = 0x00; 612 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 613 mos7840_port->shadowLCR = Data; 614 615 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 616 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 617 618 Data = 0x0c; 619 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 620 621 Data = 0x0; 622 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 623 624 Data = 0x00; 625 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 626 627 Data = Data & ~SERIAL_LCR_DLAB; 628 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 629 mos7840_port->shadowLCR = Data; 630 631 /* clearing Bulkin and Bulkout Fifo */ 632 Data = 0x0; 633 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 634 635 Data = Data | 0x0c; 636 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 637 638 Data = Data & ~0x0c; 639 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 640 /* Finally enable all interrupts */ 641 Data = 0x0c; 642 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 643 644 /* clearing rx_disable */ 645 Data = 0x0; 646 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 647 &Data); 648 Data = Data & ~0x20; 649 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 650 Data); 651 652 /* rx_negate */ 653 Data = 0x0; 654 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 655 &Data); 656 Data = Data | 0x10; 657 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 658 Data); 659 660 dev_dbg(&port->dev, "port number is %d\n", port->port_number); 661 dev_dbg(&port->dev, "minor number is %d\n", port->minor); 662 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 663 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 664 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 665 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 666 mos7840_port->read_urb = port->read_urb; 667 668 /* set up our bulk in urb */ 669 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 670 usb_fill_bulk_urb(mos7840_port->read_urb, 671 serial->dev, 672 usb_rcvbulkpipe(serial->dev, 673 (port->bulk_in_endpointAddress) + 2), 674 port->bulk_in_buffer, 675 mos7840_port->read_urb->transfer_buffer_length, 676 mos7840_bulk_in_callback, mos7840_port); 677 } else { 678 usb_fill_bulk_urb(mos7840_port->read_urb, 679 serial->dev, 680 usb_rcvbulkpipe(serial->dev, 681 port->bulk_in_endpointAddress), 682 port->bulk_in_buffer, 683 mos7840_port->read_urb->transfer_buffer_length, 684 mos7840_bulk_in_callback, mos7840_port); 685 } 686 687 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 688 mos7840_port->read_urb_busy = true; 689 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 690 if (response) { 691 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 692 __func__, response); 693 mos7840_port->read_urb_busy = false; 694 } 695 696 /* initialize our port settings */ 697 /* Must set to enable ints! */ 698 mos7840_port->shadowMCR = MCR_MASTER_IE; 699 700 return 0; 701 err: 702 for (j = 0; j < NUM_URBS; ++j) { 703 urb = mos7840_port->write_urb_pool[j]; 704 if (!urb) 705 continue; 706 kfree(urb->transfer_buffer); 707 usb_free_urb(urb); 708 } 709 return status; 710 } 711 712 /***************************************************************************** 713 * mos7840_chars_in_buffer 714 * this function is called by the tty driver when it wants to know how many 715 * bytes of data we currently have outstanding in the port (data that has 716 * been written, but hasn't made it out the port yet) 717 *****************************************************************************/ 718 719 static unsigned int mos7840_chars_in_buffer(struct tty_struct *tty) 720 { 721 struct usb_serial_port *port = tty->driver_data; 722 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 723 int i; 724 unsigned int chars = 0; 725 unsigned long flags; 726 727 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 728 for (i = 0; i < NUM_URBS; ++i) { 729 if (mos7840_port->busy[i]) { 730 struct urb *urb = mos7840_port->write_urb_pool[i]; 731 chars += urb->transfer_buffer_length; 732 } 733 } 734 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 735 dev_dbg(&port->dev, "%s - returns %u\n", __func__, chars); 736 return chars; 737 738 } 739 740 /***************************************************************************** 741 * mos7840_close 742 * this function is called by the tty driver when a port is closed 743 *****************************************************************************/ 744 745 static void mos7840_close(struct usb_serial_port *port) 746 { 747 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 748 int j; 749 __u16 Data; 750 751 for (j = 0; j < NUM_URBS; ++j) 752 usb_kill_urb(mos7840_port->write_urb_pool[j]); 753 754 /* Freeing Write URBs */ 755 for (j = 0; j < NUM_URBS; ++j) { 756 if (mos7840_port->write_urb_pool[j]) { 757 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer); 758 usb_free_urb(mos7840_port->write_urb_pool[j]); 759 } 760 } 761 762 usb_kill_urb(mos7840_port->read_urb); 763 mos7840_port->read_urb_busy = false; 764 765 Data = 0x0; 766 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 767 768 Data = 0x00; 769 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 770 } 771 772 /***************************************************************************** 773 * mos7840_break 774 * this function sends a break to the port 775 *****************************************************************************/ 776 static int mos7840_break(struct tty_struct *tty, int break_state) 777 { 778 struct usb_serial_port *port = tty->driver_data; 779 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 780 unsigned char data; 781 782 if (break_state == -1) 783 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 784 else 785 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 786 787 /* FIXME: no locking on shadowLCR anywhere in driver */ 788 mos7840_port->shadowLCR = data; 789 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 790 791 return mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 792 mos7840_port->shadowLCR); 793 } 794 795 /***************************************************************************** 796 * mos7840_write_room 797 * this function is called by the tty driver when it wants to know how many 798 * bytes of data we can accept for a specific port. 799 *****************************************************************************/ 800 801 static unsigned int mos7840_write_room(struct tty_struct *tty) 802 { 803 struct usb_serial_port *port = tty->driver_data; 804 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 805 int i; 806 unsigned int room = 0; 807 unsigned long flags; 808 809 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 810 for (i = 0; i < NUM_URBS; ++i) { 811 if (!mos7840_port->busy[i]) 812 room += URB_TRANSFER_BUFFER_SIZE; 813 } 814 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 815 816 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 817 dev_dbg(&mos7840_port->port->dev, "%s - returns %u\n", __func__, room); 818 return room; 819 820 } 821 822 /***************************************************************************** 823 * mos7840_write 824 * this function is called by the tty driver when data should be written to 825 * the port. 826 * If successful, we return the number of bytes written, otherwise we 827 * return a negative error number. 828 *****************************************************************************/ 829 830 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 831 const unsigned char *data, int count) 832 { 833 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 834 struct usb_serial *serial = port->serial; 835 int status; 836 int i; 837 int bytes_sent = 0; 838 int transfer_size; 839 unsigned long flags; 840 struct urb *urb; 841 /* __u16 Data; */ 842 const unsigned char *current_position = data; 843 844 /* try to find a free urb in the list */ 845 urb = NULL; 846 847 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 848 for (i = 0; i < NUM_URBS; ++i) { 849 if (!mos7840_port->busy[i]) { 850 mos7840_port->busy[i] = 1; 851 urb = mos7840_port->write_urb_pool[i]; 852 dev_dbg(&port->dev, "URB:%d\n", i); 853 break; 854 } 855 } 856 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 857 858 if (urb == NULL) { 859 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 860 goto exit; 861 } 862 863 if (urb->transfer_buffer == NULL) { 864 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 865 GFP_ATOMIC); 866 if (!urb->transfer_buffer) { 867 bytes_sent = -ENOMEM; 868 goto exit; 869 } 870 } 871 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 872 873 memcpy(urb->transfer_buffer, current_position, transfer_size); 874 875 /* fill urb with data and submit */ 876 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 877 usb_fill_bulk_urb(urb, 878 serial->dev, 879 usb_sndbulkpipe(serial->dev, 880 (port->bulk_out_endpointAddress) + 2), 881 urb->transfer_buffer, 882 transfer_size, 883 mos7840_bulk_out_data_callback, mos7840_port); 884 } else { 885 usb_fill_bulk_urb(urb, 886 serial->dev, 887 usb_sndbulkpipe(serial->dev, 888 port->bulk_out_endpointAddress), 889 urb->transfer_buffer, 890 transfer_size, 891 mos7840_bulk_out_data_callback, mos7840_port); 892 } 893 894 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 895 896 if (mos7840_port->has_led) 897 mos7840_led_activity(port); 898 899 /* send it down the pipe */ 900 status = usb_submit_urb(urb, GFP_ATOMIC); 901 902 if (status) { 903 mos7840_port->busy[i] = 0; 904 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 905 "with status = %d\n", __func__, status); 906 bytes_sent = status; 907 goto exit; 908 } 909 bytes_sent = transfer_size; 910 port->icount.tx += transfer_size; 911 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 912 exit: 913 return bytes_sent; 914 915 } 916 917 /***************************************************************************** 918 * mos7840_throttle 919 * this function is called by the tty driver when it wants to stop the data 920 * being read from the port. 921 *****************************************************************************/ 922 923 static void mos7840_throttle(struct tty_struct *tty) 924 { 925 struct usb_serial_port *port = tty->driver_data; 926 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 927 int status; 928 929 /* if we are implementing XON/XOFF, send the stop character */ 930 if (I_IXOFF(tty)) { 931 unsigned char stop_char = STOP_CHAR(tty); 932 status = mos7840_write(tty, port, &stop_char, 1); 933 if (status <= 0) 934 return; 935 } 936 /* if we are implementing RTS/CTS, toggle that line */ 937 if (C_CRTSCTS(tty)) { 938 mos7840_port->shadowMCR &= ~MCR_RTS; 939 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 940 mos7840_port->shadowMCR); 941 if (status < 0) 942 return; 943 } 944 } 945 946 /***************************************************************************** 947 * mos7840_unthrottle 948 * this function is called by the tty driver when it wants to resume 949 * the data being read from the port (called after mos7840_throttle is 950 * called) 951 *****************************************************************************/ 952 static void mos7840_unthrottle(struct tty_struct *tty) 953 { 954 struct usb_serial_port *port = tty->driver_data; 955 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 956 int status; 957 958 /* if we are implementing XON/XOFF, send the start character */ 959 if (I_IXOFF(tty)) { 960 unsigned char start_char = START_CHAR(tty); 961 status = mos7840_write(tty, port, &start_char, 1); 962 if (status <= 0) 963 return; 964 } 965 966 /* if we are implementing RTS/CTS, toggle that line */ 967 if (C_CRTSCTS(tty)) { 968 mos7840_port->shadowMCR |= MCR_RTS; 969 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 970 mos7840_port->shadowMCR); 971 if (status < 0) 972 return; 973 } 974 } 975 976 static int mos7840_tiocmget(struct tty_struct *tty) 977 { 978 struct usb_serial_port *port = tty->driver_data; 979 unsigned int result; 980 __u16 msr; 981 __u16 mcr; 982 int status; 983 984 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 985 if (status < 0) 986 return -EIO; 987 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 988 if (status < 0) 989 return -EIO; 990 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 991 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 992 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 993 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 994 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 995 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 996 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 997 998 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 999 1000 return result; 1001 } 1002 1003 static int mos7840_tiocmset(struct tty_struct *tty, 1004 unsigned int set, unsigned int clear) 1005 { 1006 struct usb_serial_port *port = tty->driver_data; 1007 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 1008 unsigned int mcr; 1009 int status; 1010 1011 /* FIXME: What locks the port registers ? */ 1012 mcr = mos7840_port->shadowMCR; 1013 if (clear & TIOCM_RTS) 1014 mcr &= ~MCR_RTS; 1015 if (clear & TIOCM_DTR) 1016 mcr &= ~MCR_DTR; 1017 if (clear & TIOCM_LOOP) 1018 mcr &= ~MCR_LOOPBACK; 1019 1020 if (set & TIOCM_RTS) 1021 mcr |= MCR_RTS; 1022 if (set & TIOCM_DTR) 1023 mcr |= MCR_DTR; 1024 if (set & TIOCM_LOOP) 1025 mcr |= MCR_LOOPBACK; 1026 1027 mos7840_port->shadowMCR = mcr; 1028 1029 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1030 if (status < 0) { 1031 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1032 return status; 1033 } 1034 1035 return 0; 1036 } 1037 1038 /***************************************************************************** 1039 * mos7840_calc_baud_rate_divisor 1040 * this function calculates the proper baud rate divisor for the specified 1041 * baud rate. 1042 *****************************************************************************/ 1043 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1044 int baudRate, int *divisor, 1045 __u16 *clk_sel_val) 1046 { 1047 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1048 1049 if (baudRate <= 115200) { 1050 *divisor = 115200 / baudRate; 1051 *clk_sel_val = 0x0; 1052 } 1053 if ((baudRate > 115200) && (baudRate <= 230400)) { 1054 *divisor = 230400 / baudRate; 1055 *clk_sel_val = 0x10; 1056 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1057 *divisor = 403200 / baudRate; 1058 *clk_sel_val = 0x20; 1059 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1060 *divisor = 460800 / baudRate; 1061 *clk_sel_val = 0x30; 1062 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1063 *divisor = 806400 / baudRate; 1064 *clk_sel_val = 0x40; 1065 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1066 *divisor = 921600 / baudRate; 1067 *clk_sel_val = 0x50; 1068 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1069 *divisor = 1572864 / baudRate; 1070 *clk_sel_val = 0x60; 1071 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1072 *divisor = 3145728 / baudRate; 1073 *clk_sel_val = 0x70; 1074 } 1075 return 0; 1076 } 1077 1078 /***************************************************************************** 1079 * mos7840_send_cmd_write_baud_rate 1080 * this function sends the proper command to change the baud rate of the 1081 * specified port. 1082 *****************************************************************************/ 1083 1084 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1085 int baudRate) 1086 { 1087 struct usb_serial_port *port = mos7840_port->port; 1088 int divisor = 0; 1089 int status; 1090 __u16 Data; 1091 __u16 clk_sel_val; 1092 1093 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1094 /* reset clk_uart_sel in spregOffset */ 1095 if (baudRate > 115200) { 1096 #ifdef HW_flow_control 1097 /* NOTE: need to see the pther register to modify */ 1098 /* setting h/w flow control bit to 1 */ 1099 Data = 0x2b; 1100 mos7840_port->shadowMCR = Data; 1101 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1102 Data); 1103 if (status < 0) { 1104 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1105 return -1; 1106 } 1107 #endif 1108 1109 } else { 1110 #ifdef HW_flow_control 1111 /* setting h/w flow control bit to 0 */ 1112 Data = 0xb; 1113 mos7840_port->shadowMCR = Data; 1114 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1115 Data); 1116 if (status < 0) { 1117 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1118 return -1; 1119 } 1120 #endif 1121 1122 } 1123 1124 if (1) { /* baudRate <= 115200) */ 1125 clk_sel_val = 0x0; 1126 Data = 0x0; 1127 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1128 &clk_sel_val); 1129 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1130 &Data); 1131 if (status < 0) { 1132 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1133 return -1; 1134 } 1135 Data = (Data & 0x8f) | clk_sel_val; 1136 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1137 Data); 1138 if (status < 0) { 1139 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1140 return -1; 1141 } 1142 /* Calculate the Divisor */ 1143 1144 if (status) { 1145 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1146 return status; 1147 } 1148 /* Enable access to divisor latch */ 1149 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1150 mos7840_port->shadowLCR = Data; 1151 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1152 1153 /* Write the divisor */ 1154 Data = (unsigned char)(divisor & 0xff); 1155 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1156 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1157 1158 Data = (unsigned char)((divisor & 0xff00) >> 8); 1159 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1160 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1161 1162 /* Disable access to divisor latch */ 1163 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1164 mos7840_port->shadowLCR = Data; 1165 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1166 1167 } 1168 return status; 1169 } 1170 1171 /***************************************************************************** 1172 * mos7840_change_port_settings 1173 * This routine is called to set the UART on the device to match 1174 * the specified new settings. 1175 *****************************************************************************/ 1176 1177 static void mos7840_change_port_settings(struct tty_struct *tty, 1178 struct moschip_port *mos7840_port, 1179 const struct ktermios *old_termios) 1180 { 1181 struct usb_serial_port *port = mos7840_port->port; 1182 int baud; 1183 unsigned cflag; 1184 __u8 lData; 1185 __u8 lParity; 1186 __u8 lStop; 1187 int status; 1188 __u16 Data; 1189 1190 lData = LCR_BITS_8; 1191 lStop = LCR_STOP_1; 1192 lParity = LCR_PAR_NONE; 1193 1194 cflag = tty->termios.c_cflag; 1195 1196 /* Change the number of bits */ 1197 switch (cflag & CSIZE) { 1198 case CS5: 1199 lData = LCR_BITS_5; 1200 break; 1201 1202 case CS6: 1203 lData = LCR_BITS_6; 1204 break; 1205 1206 case CS7: 1207 lData = LCR_BITS_7; 1208 break; 1209 1210 default: 1211 case CS8: 1212 lData = LCR_BITS_8; 1213 break; 1214 } 1215 1216 /* Change the Parity bit */ 1217 if (cflag & PARENB) { 1218 if (cflag & PARODD) { 1219 lParity = LCR_PAR_ODD; 1220 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1221 } else { 1222 lParity = LCR_PAR_EVEN; 1223 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1224 } 1225 1226 } else { 1227 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1228 } 1229 1230 if (cflag & CMSPAR) 1231 lParity = lParity | 0x20; 1232 1233 /* Change the Stop bit */ 1234 if (cflag & CSTOPB) { 1235 lStop = LCR_STOP_2; 1236 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1237 } else { 1238 lStop = LCR_STOP_1; 1239 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1240 } 1241 1242 /* Update the LCR with the correct value */ 1243 mos7840_port->shadowLCR &= 1244 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1245 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1246 1247 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1248 mos7840_port->shadowLCR); 1249 /* Disable Interrupts */ 1250 Data = 0x00; 1251 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1252 1253 Data = 0x00; 1254 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1255 1256 Data = 0xcf; 1257 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1258 1259 /* Send the updated LCR value to the mos7840 */ 1260 Data = mos7840_port->shadowLCR; 1261 1262 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1263 1264 Data = 0x00b; 1265 mos7840_port->shadowMCR = Data; 1266 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1267 Data = 0x00b; 1268 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1269 1270 /* set up the MCR register and send it to the mos7840 */ 1271 1272 mos7840_port->shadowMCR = MCR_MASTER_IE; 1273 if (cflag & CBAUD) 1274 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1275 1276 if (cflag & CRTSCTS) 1277 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1278 else 1279 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1280 1281 Data = mos7840_port->shadowMCR; 1282 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1283 1284 /* Determine divisor based on baud rate */ 1285 baud = tty_get_baud_rate(tty); 1286 1287 if (!baud) { 1288 /* pick a default, any default... */ 1289 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1290 baud = 9600; 1291 } 1292 1293 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1294 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1295 1296 /* Enable Interrupts */ 1297 Data = 0x0c; 1298 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1299 1300 if (!mos7840_port->read_urb_busy) { 1301 mos7840_port->read_urb_busy = true; 1302 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1303 if (status) { 1304 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1305 status); 1306 mos7840_port->read_urb_busy = false; 1307 } 1308 } 1309 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1310 mos7840_port->shadowLCR); 1311 } 1312 1313 /***************************************************************************** 1314 * mos7840_set_termios 1315 * this function is called by the tty driver when it wants to change 1316 * the termios structure 1317 *****************************************************************************/ 1318 1319 static void mos7840_set_termios(struct tty_struct *tty, 1320 struct usb_serial_port *port, 1321 const struct ktermios *old_termios) 1322 { 1323 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 1324 int status; 1325 1326 /* change the port settings to the new ones specified */ 1327 1328 mos7840_change_port_settings(tty, mos7840_port, old_termios); 1329 1330 if (!mos7840_port->read_urb_busy) { 1331 mos7840_port->read_urb_busy = true; 1332 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1333 if (status) { 1334 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1335 status); 1336 mos7840_port->read_urb_busy = false; 1337 } 1338 } 1339 } 1340 1341 /***************************************************************************** 1342 * mos7840_get_lsr_info - get line status register info 1343 * 1344 * Purpose: Let user call ioctl() to get info when the UART physically 1345 * is emptied. On bus types like RS485, the transmitter must 1346 * release the bus after transmitting. This must be done when 1347 * the transmit shift register is empty, not be done when the 1348 * transmit holding register is empty. This functionality 1349 * allows an RS485 driver to be written in user space. 1350 *****************************************************************************/ 1351 1352 static int mos7840_get_lsr_info(struct tty_struct *tty, 1353 unsigned int __user *value) 1354 { 1355 int count; 1356 unsigned int result = 0; 1357 1358 count = mos7840_chars_in_buffer(tty); 1359 if (count == 0) 1360 result = TIOCSER_TEMT; 1361 1362 if (copy_to_user(value, &result, sizeof(int))) 1363 return -EFAULT; 1364 return 0; 1365 } 1366 1367 /***************************************************************************** 1368 * SerialIoctl 1369 * this function handles any ioctl calls to the driver 1370 *****************************************************************************/ 1371 1372 static int mos7840_ioctl(struct tty_struct *tty, 1373 unsigned int cmd, unsigned long arg) 1374 { 1375 struct usb_serial_port *port = tty->driver_data; 1376 void __user *argp = (void __user *)arg; 1377 1378 switch (cmd) { 1379 /* return number of bytes available */ 1380 1381 case TIOCSERGETLSR: 1382 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 1383 return mos7840_get_lsr_info(tty, argp); 1384 1385 default: 1386 break; 1387 } 1388 return -ENOIOCTLCMD; 1389 } 1390 1391 /* 1392 * Check if GPO (pin 42) is connected to GPI (pin 33) as recommended by ASIX 1393 * for MCS7810 by bit-banging a 16-bit word. 1394 * 1395 * Note that GPO is really RTS of the third port so this will toggle RTS of 1396 * port two or three on two- and four-port devices. 1397 */ 1398 static int mos7810_check(struct usb_serial *serial) 1399 { 1400 int i, pass_count = 0; 1401 u8 *buf; 1402 __u16 data = 0, mcr_data = 0; 1403 __u16 test_pattern = 0x55AA; 1404 int res; 1405 1406 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 1407 if (!buf) 1408 return 0; /* failed to identify 7810 */ 1409 1410 /* Store MCR setting */ 1411 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 1412 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 1413 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 1414 if (res == VENDOR_READ_LENGTH) 1415 mcr_data = *buf; 1416 1417 for (i = 0; i < 16; i++) { 1418 /* Send the 1-bit test pattern out to MCS7810 test pin */ 1419 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1420 MCS_WRREQ, MCS_WR_RTYPE, 1421 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 1422 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 1423 1424 /* Read the test pattern back */ 1425 res = usb_control_msg(serial->dev, 1426 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 1427 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 1428 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 1429 if (res == VENDOR_READ_LENGTH) 1430 data = *buf; 1431 1432 /* If this is a MCS7810 device, both test patterns must match */ 1433 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 1434 break; 1435 1436 pass_count++; 1437 } 1438 1439 /* Restore MCR setting */ 1440 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 1441 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 1442 0, MOS_WDR_TIMEOUT); 1443 1444 kfree(buf); 1445 1446 if (pass_count == 16) 1447 return 1; 1448 1449 return 0; 1450 } 1451 1452 static int mos7840_probe(struct usb_serial *serial, 1453 const struct usb_device_id *id) 1454 { 1455 unsigned long device_flags = id->driver_info; 1456 u8 *buf; 1457 1458 /* Skip device-type detection if we already have device flags. */ 1459 if (device_flags) 1460 goto out; 1461 1462 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 1463 if (!buf) 1464 return -ENOMEM; 1465 1466 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 1467 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 1468 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 1469 1470 /* For a MCS7840 device GPIO0 must be set to 1 */ 1471 if (buf[0] & 0x01) 1472 device_flags = MCS_PORTS(4); 1473 else if (mos7810_check(serial)) 1474 device_flags = MCS_PORTS(1) | MCS_LED; 1475 else 1476 device_flags = MCS_PORTS(2); 1477 1478 kfree(buf); 1479 out: 1480 usb_set_serial_data(serial, (void *)device_flags); 1481 1482 return 0; 1483 } 1484 1485 static int mos7840_calc_num_ports(struct usb_serial *serial, 1486 struct usb_serial_endpoints *epds) 1487 { 1488 unsigned long device_flags = (unsigned long)usb_get_serial_data(serial); 1489 int num_ports = MCS_PORTS(device_flags); 1490 1491 if (num_ports == 0 || num_ports > 4) 1492 return -ENODEV; 1493 1494 if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) { 1495 dev_err(&serial->interface->dev, "missing endpoints\n"); 1496 return -ENODEV; 1497 } 1498 1499 return num_ports; 1500 } 1501 1502 static int mos7840_attach(struct usb_serial *serial) 1503 { 1504 struct device *dev = &serial->interface->dev; 1505 int status; 1506 u16 val; 1507 1508 /* Zero Length flag enable */ 1509 val = 0x0f; 1510 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, val); 1511 if (status < 0) 1512 dev_dbg(dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 1513 else 1514 dev_dbg(dev, "ZLP_REG5 Writing success status%d\n", status); 1515 1516 return status; 1517 } 1518 1519 static int mos7840_port_probe(struct usb_serial_port *port) 1520 { 1521 struct usb_serial *serial = port->serial; 1522 unsigned long device_flags = (unsigned long)usb_get_serial_data(serial); 1523 struct moschip_port *mos7840_port; 1524 int status; 1525 int pnum; 1526 __u16 Data; 1527 1528 /* we set up the pointers to the endpoints in the mos7840_open * 1529 * function, as the structures aren't created yet. */ 1530 1531 pnum = port->port_number; 1532 1533 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 1534 mos7840_port = kzalloc_obj(struct moschip_port); 1535 if (!mos7840_port) 1536 return -ENOMEM; 1537 1538 /* Initialize all port interrupt end point to port 0 int 1539 * endpoint. Our device has only one interrupt end point 1540 * common to all port */ 1541 1542 mos7840_port->port = port; 1543 spin_lock_init(&mos7840_port->pool_lock); 1544 1545 /* minor is not initialised until later by 1546 * usb-serial.c:get_free_serial() and cannot therefore be used 1547 * to index device instances */ 1548 mos7840_port->port_num = pnum + 1; 1549 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 1550 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 1551 1552 if (mos7840_port->port_num == 1) { 1553 mos7840_port->SpRegOffset = 0x0; 1554 mos7840_port->ControlRegOffset = 0x1; 1555 mos7840_port->DcrRegOffset = 0x4; 1556 } else { 1557 u8 phy_num = mos7840_port->port_num; 1558 1559 /* Port 2 in the 2-port case uses registers of port 3 */ 1560 if (serial->num_ports == 2) 1561 phy_num = 3; 1562 1563 mos7840_port->SpRegOffset = 0x8 + 2 * (phy_num - 2); 1564 mos7840_port->ControlRegOffset = 0x9 + 2 * (phy_num - 2); 1565 mos7840_port->DcrRegOffset = 0x16 + 3 * (phy_num - 2); 1566 } 1567 mos7840_dump_serial_port(port, mos7840_port); 1568 usb_set_serial_port_data(port, mos7840_port); 1569 1570 /* enable rx_disable bit in control register */ 1571 status = mos7840_get_reg_sync(port, 1572 mos7840_port->ControlRegOffset, &Data); 1573 if (status < 0) { 1574 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 1575 goto error; 1576 } else 1577 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 1578 Data |= 0x08; /* setting driver done bit */ 1579 Data |= 0x04; /* sp1_bit to have cts change reflect in 1580 modem status reg */ 1581 1582 /* Data |= 0x20; //rx_disable bit */ 1583 status = mos7840_set_reg_sync(port, 1584 mos7840_port->ControlRegOffset, Data); 1585 if (status < 0) { 1586 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 1587 goto error; 1588 } else 1589 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 1590 1591 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 1592 and 0x24 in DCR3 */ 1593 Data = 0x01; 1594 status = mos7840_set_reg_sync(port, 1595 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 1596 if (status < 0) { 1597 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 1598 goto error; 1599 } else 1600 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 1601 1602 Data = 0x05; 1603 status = mos7840_set_reg_sync(port, 1604 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 1605 if (status < 0) { 1606 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 1607 goto error; 1608 } else 1609 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 1610 1611 Data = 0x24; 1612 status = mos7840_set_reg_sync(port, 1613 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 1614 if (status < 0) { 1615 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 1616 goto error; 1617 } else 1618 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 1619 1620 /* write values in clkstart0x0 and clkmulti 0x20 */ 1621 Data = 0x0; 1622 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 1623 if (status < 0) { 1624 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 1625 goto error; 1626 } else 1627 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 1628 1629 Data = 0x20; 1630 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 1631 if (status < 0) { 1632 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 1633 goto error; 1634 } else 1635 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 1636 1637 /* write value 0x0 to scratchpad register */ 1638 Data = 0x00; 1639 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 1640 if (status < 0) { 1641 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 1642 goto error; 1643 } else 1644 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 1645 1646 /* Zero Length flag register */ 1647 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 1648 Data = 0xff; 1649 status = mos7840_set_reg_sync(port, 1650 (__u16) (ZLP_REG1 + 1651 ((__u16)mos7840_port->port_num)), Data); 1652 dev_dbg(&port->dev, "ZLIP offset %x\n", 1653 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 1654 if (status < 0) { 1655 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 1656 goto error; 1657 } else 1658 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 1659 } else { 1660 Data = 0xff; 1661 status = mos7840_set_reg_sync(port, 1662 (__u16) (ZLP_REG1 + 1663 ((__u16)mos7840_port->port_num) - 0x1), Data); 1664 dev_dbg(&port->dev, "ZLIP offset %x\n", 1665 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 1666 if (status < 0) { 1667 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 1668 goto error; 1669 } else 1670 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 1671 1672 } 1673 1674 mos7840_port->has_led = device_flags & MCS_LED; 1675 1676 /* Initialize LED timers */ 1677 if (mos7840_port->has_led) { 1678 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); 1679 mos7840_port->led_dr = kmalloc_obj(*mos7840_port->led_dr); 1680 if (!mos7840_port->led_urb || !mos7840_port->led_dr) { 1681 status = -ENOMEM; 1682 goto error; 1683 } 1684 1685 timer_setup(&mos7840_port->led_timer1, mos7840_led_off, 0); 1686 mos7840_port->led_timer1.expires = 1687 jiffies + msecs_to_jiffies(LED_ON_MS); 1688 timer_setup(&mos7840_port->led_timer2, mos7840_led_flag_off, 1689 0); 1690 mos7840_port->led_timer2.expires = 1691 jiffies + msecs_to_jiffies(LED_OFF_MS); 1692 1693 /* Turn off LED */ 1694 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 1695 } 1696 1697 return 0; 1698 error: 1699 kfree(mos7840_port->led_dr); 1700 usb_free_urb(mos7840_port->led_urb); 1701 kfree(mos7840_port); 1702 1703 return status; 1704 } 1705 1706 static void mos7840_port_remove(struct usb_serial_port *port) 1707 { 1708 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 1709 1710 if (mos7840_port->has_led) { 1711 /* Turn off LED */ 1712 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 1713 1714 timer_shutdown_sync(&mos7840_port->led_timer1); 1715 timer_shutdown_sync(&mos7840_port->led_timer2); 1716 1717 usb_kill_urb(mos7840_port->led_urb); 1718 usb_free_urb(mos7840_port->led_urb); 1719 kfree(mos7840_port->led_dr); 1720 } 1721 1722 kfree(mos7840_port); 1723 } 1724 1725 static int mos7840_suspend(struct usb_serial *serial, pm_message_t message) 1726 { 1727 struct moschip_port *mos7840_port; 1728 struct usb_serial_port *port; 1729 int i; 1730 1731 for (i = 0; i < serial->num_ports; ++i) { 1732 port = serial->port[i]; 1733 if (!tty_port_initialized(&port->port)) 1734 continue; 1735 1736 mos7840_port = usb_get_serial_port_data(port); 1737 1738 usb_kill_urb(mos7840_port->read_urb); 1739 mos7840_port->read_urb_busy = false; 1740 } 1741 1742 return 0; 1743 } 1744 1745 static int mos7840_resume(struct usb_serial *serial) 1746 { 1747 struct moschip_port *mos7840_port; 1748 struct usb_serial_port *port; 1749 int res; 1750 int i; 1751 1752 for (i = 0; i < serial->num_ports; ++i) { 1753 port = serial->port[i]; 1754 if (!tty_port_initialized(&port->port)) 1755 continue; 1756 1757 mos7840_port = usb_get_serial_port_data(port); 1758 1759 mos7840_port->read_urb_busy = true; 1760 res = usb_submit_urb(mos7840_port->read_urb, GFP_NOIO); 1761 if (res) 1762 mos7840_port->read_urb_busy = false; 1763 } 1764 1765 return 0; 1766 } 1767 1768 static struct usb_serial_driver moschip7840_4port_device = { 1769 .driver = { 1770 .name = "mos7840", 1771 }, 1772 .description = DRIVER_DESC, 1773 .id_table = id_table, 1774 .num_interrupt_in = 1, 1775 .open = mos7840_open, 1776 .close = mos7840_close, 1777 .write = mos7840_write, 1778 .write_room = mos7840_write_room, 1779 .chars_in_buffer = mos7840_chars_in_buffer, 1780 .throttle = mos7840_throttle, 1781 .unthrottle = mos7840_unthrottle, 1782 .calc_num_ports = mos7840_calc_num_ports, 1783 .probe = mos7840_probe, 1784 .attach = mos7840_attach, 1785 .ioctl = mos7840_ioctl, 1786 .set_termios = mos7840_set_termios, 1787 .break_ctl = mos7840_break, 1788 .tiocmget = mos7840_tiocmget, 1789 .tiocmset = mos7840_tiocmset, 1790 .get_icount = usb_serial_generic_get_icount, 1791 .port_probe = mos7840_port_probe, 1792 .port_remove = mos7840_port_remove, 1793 .read_bulk_callback = mos7840_bulk_in_callback, 1794 .suspend = mos7840_suspend, 1795 .resume = mos7840_resume, 1796 }; 1797 1798 static struct usb_serial_driver * const serial_drivers[] = { 1799 &moschip7840_4port_device, NULL 1800 }; 1801 1802 module_usb_serial_driver(serial_drivers, id_table); 1803 1804 MODULE_DESCRIPTION(DRIVER_DESC); 1805 MODULE_LICENSE("GPL"); 1806