1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * mos7720.c 4 * Controls the Moschip 7720 usb to dual port serial converter 5 * 6 * Copyright 2006 Moschip Semiconductor Tech. Ltd. 7 * 8 * Developed by: 9 * Vijaya Kumar <vijaykumar.gn@gmail.com> 10 * Ajay Kumar <naanuajay@yahoo.com> 11 * Gurudeva <ngurudeva@yahoo.com> 12 * 13 * Cleaned up from the original by: 14 * Greg Kroah-Hartman <gregkh@suse.de> 15 * 16 * Originally based on drivers/usb/serial/io_edgeport.c which is: 17 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 18 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 19 */ 20 #include <linux/kernel.h> 21 #include <linux/errno.h> 22 #include <linux/slab.h> 23 #include <linux/tty.h> 24 #include <linux/tty_driver.h> 25 #include <linux/tty_flip.h> 26 #include <linux/module.h> 27 #include <linux/spinlock.h> 28 #include <linux/serial.h> 29 #include <linux/serial_reg.h> 30 #include <linux/usb.h> 31 #include <linux/usb/serial.h> 32 #include <linux/uaccess.h> 33 #include <linux/parport.h> 34 35 #define DRIVER_AUTHOR "Aspire Communications pvt Ltd." 36 #define DRIVER_DESC "Moschip USB Serial Driver" 37 38 /* default urb timeout */ 39 #define MOS_WDR_TIMEOUT 5000 40 41 #define MOS_MAX_PORT 0x02 42 #define MOS_WRITE 0x0E 43 #define MOS_READ 0x0D 44 45 /* Interrupt Routines Defines */ 46 #define SERIAL_IIR_RLS 0x06 47 #define SERIAL_IIR_RDA 0x04 48 #define SERIAL_IIR_CTI 0x0c 49 #define SERIAL_IIR_THR 0x02 50 #define SERIAL_IIR_MS 0x00 51 52 #define NUM_URBS 16 /* URB Count */ 53 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 54 55 /* This structure holds all of the local serial port information */ 56 struct moschip_port { 57 __u8 shadowLCR; /* last LCR value received */ 58 __u8 shadowMCR; /* last MCR value received */ 59 __u8 shadowMSR; /* last MSR value received */ 60 char open; 61 struct usb_serial_port *port; /* loop back to the owner */ 62 struct urb *write_urb_pool[NUM_URBS]; 63 }; 64 65 #define USB_VENDOR_ID_MOSCHIP 0x9710 66 #define MOSCHIP_DEVICE_ID_7720 0x7720 67 #define MOSCHIP_DEVICE_ID_7715 0x7715 68 69 static const struct usb_device_id id_table[] = { 70 { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) }, 71 { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) }, 72 { } /* terminating entry */ 73 }; 74 MODULE_DEVICE_TABLE(usb, id_table); 75 76 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT 77 78 /* initial values for parport regs */ 79 #define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */ 80 #define ECR_INIT_VAL 0x00 /* SPP mode */ 81 82 struct urbtracker { 83 struct mos7715_parport *mos_parport; 84 struct list_head urblist_entry; 85 struct kref ref_count; 86 struct urb *urb; 87 struct usb_ctrlrequest *setup; 88 }; 89 90 enum mos7715_pp_modes { 91 SPP = 0<<5, 92 PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */ 93 PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */ 94 }; 95 96 struct mos7715_parport { 97 struct parport *pp; /* back to containing struct */ 98 struct kref ref_count; /* to instance of this struct */ 99 struct list_head deferred_urbs; /* list deferred async urbs */ 100 struct list_head active_urbs; /* list async urbs in flight */ 101 spinlock_t listlock; /* protects list access */ 102 bool msg_pending; /* usb sync call pending */ 103 struct completion syncmsg_compl; /* usb sync call completed */ 104 struct tasklet_struct urb_tasklet; /* for sending deferred urbs */ 105 struct usb_serial *serial; /* back to containing struct */ 106 __u8 shadowECR; /* parallel port regs... */ 107 __u8 shadowDCR; 108 atomic_t shadowDSR; /* updated in int-in callback */ 109 }; 110 111 /* lock guards against dereferencing NULL ptr in parport ops callbacks */ 112 static DEFINE_SPINLOCK(release_lock); 113 114 #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ 115 116 static const unsigned int dummy; /* for clarity in register access fns */ 117 118 enum mos_regs { 119 MOS7720_THR, /* serial port regs */ 120 MOS7720_RHR, 121 MOS7720_IER, 122 MOS7720_FCR, 123 MOS7720_ISR, 124 MOS7720_LCR, 125 MOS7720_MCR, 126 MOS7720_LSR, 127 MOS7720_MSR, 128 MOS7720_SPR, 129 MOS7720_DLL, 130 MOS7720_DLM, 131 MOS7720_DPR, /* parallel port regs */ 132 MOS7720_DSR, 133 MOS7720_DCR, 134 MOS7720_ECR, 135 MOS7720_SP1_REG, /* device control regs */ 136 MOS7720_SP2_REG, /* serial port 2 (7720 only) */ 137 MOS7720_PP_REG, 138 MOS7720_SP_CONTROL_REG, 139 }; 140 141 /* 142 * Return the correct value for the Windex field of the setup packet 143 * for a control endpoint message. See the 7715 datasheet. 144 */ 145 static inline __u16 get_reg_index(enum mos_regs reg) 146 { 147 static const __u16 mos7715_index_lookup_table[] = { 148 0x00, /* MOS7720_THR */ 149 0x00, /* MOS7720_RHR */ 150 0x01, /* MOS7720_IER */ 151 0x02, /* MOS7720_FCR */ 152 0x02, /* MOS7720_ISR */ 153 0x03, /* MOS7720_LCR */ 154 0x04, /* MOS7720_MCR */ 155 0x05, /* MOS7720_LSR */ 156 0x06, /* MOS7720_MSR */ 157 0x07, /* MOS7720_SPR */ 158 0x00, /* MOS7720_DLL */ 159 0x01, /* MOS7720_DLM */ 160 0x00, /* MOS7720_DPR */ 161 0x01, /* MOS7720_DSR */ 162 0x02, /* MOS7720_DCR */ 163 0x0a, /* MOS7720_ECR */ 164 0x01, /* MOS7720_SP1_REG */ 165 0x02, /* MOS7720_SP2_REG (7720 only) */ 166 0x04, /* MOS7720_PP_REG (7715 only) */ 167 0x08, /* MOS7720_SP_CONTROL_REG */ 168 }; 169 return mos7715_index_lookup_table[reg]; 170 } 171 172 /* 173 * Return the correct value for the upper byte of the Wvalue field of 174 * the setup packet for a control endpoint message. 175 */ 176 static inline __u16 get_reg_value(enum mos_regs reg, 177 unsigned int serial_portnum) 178 { 179 if (reg >= MOS7720_SP1_REG) /* control reg */ 180 return 0x0000; 181 182 else if (reg >= MOS7720_DPR) /* parallel port reg (7715 only) */ 183 return 0x0100; 184 185 else /* serial port reg */ 186 return (serial_portnum + 2) << 8; 187 } 188 189 /* 190 * Write data byte to the specified device register. The data is embedded in 191 * the value field of the setup packet. serial_portnum is ignored for registers 192 * not specific to a particular serial port. 193 */ 194 static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, 195 enum mos_regs reg, __u8 data) 196 { 197 struct usb_device *usbdev = serial->dev; 198 unsigned int pipe = usb_sndctrlpipe(usbdev, 0); 199 __u8 request = (__u8)0x0e; 200 __u8 requesttype = (__u8)0x40; 201 __u16 index = get_reg_index(reg); 202 __u16 value = get_reg_value(reg, serial_portnum) + data; 203 int status = usb_control_msg(usbdev, pipe, request, requesttype, value, 204 index, NULL, 0, MOS_WDR_TIMEOUT); 205 if (status < 0) 206 dev_err(&usbdev->dev, 207 "mos7720: usb_control_msg() failed: %d\n", status); 208 return status; 209 } 210 211 /* 212 * Read data byte from the specified device register. The data returned by the 213 * device is embedded in the value field of the setup packet. serial_portnum is 214 * ignored for registers that are not specific to a particular serial port. 215 */ 216 static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum, 217 enum mos_regs reg, __u8 *data) 218 { 219 struct usb_device *usbdev = serial->dev; 220 unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); 221 __u8 request = (__u8)0x0d; 222 __u8 requesttype = (__u8)0xc0; 223 __u16 index = get_reg_index(reg); 224 __u16 value = get_reg_value(reg, serial_portnum); 225 u8 *buf; 226 int status; 227 228 buf = kmalloc(1, GFP_KERNEL); 229 if (!buf) 230 return -ENOMEM; 231 232 status = usb_control_msg(usbdev, pipe, request, requesttype, value, 233 index, buf, 1, MOS_WDR_TIMEOUT); 234 if (status == 1) { 235 *data = *buf; 236 } else { 237 dev_err(&usbdev->dev, 238 "mos7720: usb_control_msg() failed: %d\n", status); 239 if (status >= 0) 240 status = -EIO; 241 *data = 0; 242 } 243 244 kfree(buf); 245 246 return status; 247 } 248 249 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT 250 251 static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, 252 enum mos7715_pp_modes mode) 253 { 254 mos_parport->shadowECR = mode; 255 write_mos_reg(mos_parport->serial, dummy, MOS7720_ECR, 256 mos_parport->shadowECR); 257 return 0; 258 } 259 260 static void destroy_mos_parport(struct kref *kref) 261 { 262 struct mos7715_parport *mos_parport = 263 container_of(kref, struct mos7715_parport, ref_count); 264 265 kfree(mos_parport); 266 } 267 268 static void destroy_urbtracker(struct kref *kref) 269 { 270 struct urbtracker *urbtrack = 271 container_of(kref, struct urbtracker, ref_count); 272 struct mos7715_parport *mos_parport = urbtrack->mos_parport; 273 274 usb_free_urb(urbtrack->urb); 275 kfree(urbtrack->setup); 276 kfree(urbtrack); 277 kref_put(&mos_parport->ref_count, destroy_mos_parport); 278 } 279 280 /* 281 * This runs as a tasklet when sending an urb in a non-blocking parallel 282 * port callback had to be deferred because the disconnect mutex could not be 283 * obtained at the time. 284 */ 285 static void send_deferred_urbs(unsigned long _mos_parport) 286 { 287 int ret_val; 288 unsigned long flags; 289 struct mos7715_parport *mos_parport = (void *)_mos_parport; 290 struct urbtracker *urbtrack, *tmp; 291 struct list_head *cursor, *next; 292 struct device *dev; 293 294 /* if release function ran, game over */ 295 if (unlikely(mos_parport->serial == NULL)) 296 return; 297 298 dev = &mos_parport->serial->dev->dev; 299 300 /* try again to get the mutex */ 301 if (!mutex_trylock(&mos_parport->serial->disc_mutex)) { 302 dev_dbg(dev, "%s: rescheduling tasklet\n", __func__); 303 tasklet_schedule(&mos_parport->urb_tasklet); 304 return; 305 } 306 307 /* if device disconnected, game over */ 308 if (unlikely(mos_parport->serial->disconnected)) { 309 mutex_unlock(&mos_parport->serial->disc_mutex); 310 return; 311 } 312 313 spin_lock_irqsave(&mos_parport->listlock, flags); 314 if (list_empty(&mos_parport->deferred_urbs)) { 315 spin_unlock_irqrestore(&mos_parport->listlock, flags); 316 mutex_unlock(&mos_parport->serial->disc_mutex); 317 dev_dbg(dev, "%s: deferred_urbs list empty\n", __func__); 318 return; 319 } 320 321 /* move contents of deferred_urbs list to active_urbs list and submit */ 322 list_for_each_safe(cursor, next, &mos_parport->deferred_urbs) 323 list_move_tail(cursor, &mos_parport->active_urbs); 324 list_for_each_entry_safe(urbtrack, tmp, &mos_parport->active_urbs, 325 urblist_entry) { 326 ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); 327 dev_dbg(dev, "%s: urb submitted\n", __func__); 328 if (ret_val) { 329 dev_err(dev, "usb_submit_urb() failed: %d\n", ret_val); 330 list_del(&urbtrack->urblist_entry); 331 kref_put(&urbtrack->ref_count, destroy_urbtracker); 332 } 333 } 334 spin_unlock_irqrestore(&mos_parport->listlock, flags); 335 mutex_unlock(&mos_parport->serial->disc_mutex); 336 } 337 338 /* callback for parallel port control urbs submitted asynchronously */ 339 static void async_complete(struct urb *urb) 340 { 341 struct urbtracker *urbtrack = urb->context; 342 int status = urb->status; 343 unsigned long flags; 344 345 if (unlikely(status)) 346 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); 347 348 /* remove the urbtracker from the active_urbs list */ 349 spin_lock_irqsave(&urbtrack->mos_parport->listlock, flags); 350 list_del(&urbtrack->urblist_entry); 351 spin_unlock_irqrestore(&urbtrack->mos_parport->listlock, flags); 352 kref_put(&urbtrack->ref_count, destroy_urbtracker); 353 } 354 355 static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport, 356 enum mos_regs reg, __u8 data) 357 { 358 struct urbtracker *urbtrack; 359 int ret_val; 360 unsigned long flags; 361 struct usb_serial *serial = mos_parport->serial; 362 struct usb_device *usbdev = serial->dev; 363 364 /* create and initialize the control urb and containing urbtracker */ 365 urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC); 366 if (!urbtrack) 367 return -ENOMEM; 368 369 urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC); 370 if (!urbtrack->urb) { 371 kfree(urbtrack); 372 return -ENOMEM; 373 } 374 urbtrack->setup = kmalloc(sizeof(*urbtrack->setup), GFP_ATOMIC); 375 if (!urbtrack->setup) { 376 usb_free_urb(urbtrack->urb); 377 kfree(urbtrack); 378 return -ENOMEM; 379 } 380 urbtrack->setup->bRequestType = (__u8)0x40; 381 urbtrack->setup->bRequest = (__u8)0x0e; 382 urbtrack->setup->wValue = cpu_to_le16(get_reg_value(reg, dummy)); 383 urbtrack->setup->wIndex = cpu_to_le16(get_reg_index(reg)); 384 urbtrack->setup->wLength = 0; 385 usb_fill_control_urb(urbtrack->urb, usbdev, 386 usb_sndctrlpipe(usbdev, 0), 387 (unsigned char *)urbtrack->setup, 388 NULL, 0, async_complete, urbtrack); 389 kref_get(&mos_parport->ref_count); 390 urbtrack->mos_parport = mos_parport; 391 kref_init(&urbtrack->ref_count); 392 INIT_LIST_HEAD(&urbtrack->urblist_entry); 393 394 /* 395 * get the disconnect mutex, or add tracker to the deferred_urbs list 396 * and schedule a tasklet to try again later 397 */ 398 if (!mutex_trylock(&serial->disc_mutex)) { 399 spin_lock_irqsave(&mos_parport->listlock, flags); 400 list_add_tail(&urbtrack->urblist_entry, 401 &mos_parport->deferred_urbs); 402 spin_unlock_irqrestore(&mos_parport->listlock, flags); 403 tasklet_schedule(&mos_parport->urb_tasklet); 404 dev_dbg(&usbdev->dev, "tasklet scheduled\n"); 405 return 0; 406 } 407 408 /* bail if device disconnected */ 409 if (serial->disconnected) { 410 kref_put(&urbtrack->ref_count, destroy_urbtracker); 411 mutex_unlock(&serial->disc_mutex); 412 return -ENODEV; 413 } 414 415 /* add the tracker to the active_urbs list and submit */ 416 spin_lock_irqsave(&mos_parport->listlock, flags); 417 list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs); 418 spin_unlock_irqrestore(&mos_parport->listlock, flags); 419 ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC); 420 mutex_unlock(&serial->disc_mutex); 421 if (ret_val) { 422 dev_err(&usbdev->dev, 423 "%s: submit_urb() failed: %d\n", __func__, ret_val); 424 spin_lock_irqsave(&mos_parport->listlock, flags); 425 list_del(&urbtrack->urblist_entry); 426 spin_unlock_irqrestore(&mos_parport->listlock, flags); 427 kref_put(&urbtrack->ref_count, destroy_urbtracker); 428 return ret_val; 429 } 430 return 0; 431 } 432 433 /* 434 * This is the the common top part of all parallel port callback operations that 435 * send synchronous messages to the device. This implements convoluted locking 436 * that avoids two scenarios: (1) a port operation is called after usbserial 437 * has called our release function, at which point struct mos7715_parport has 438 * been destroyed, and (2) the device has been disconnected, but usbserial has 439 * not called the release function yet because someone has a serial port open. 440 * The shared release_lock prevents the first, and the mutex and disconnected 441 * flag maintained by usbserial covers the second. We also use the msg_pending 442 * flag to ensure that all synchronous usb message calls have completed before 443 * our release function can return. 444 */ 445 static int parport_prologue(struct parport *pp) 446 { 447 struct mos7715_parport *mos_parport; 448 449 spin_lock(&release_lock); 450 mos_parport = pp->private_data; 451 if (unlikely(mos_parport == NULL)) { 452 /* release fn called, port struct destroyed */ 453 spin_unlock(&release_lock); 454 return -1; 455 } 456 mos_parport->msg_pending = true; /* synch usb call pending */ 457 reinit_completion(&mos_parport->syncmsg_compl); 458 spin_unlock(&release_lock); 459 460 mutex_lock(&mos_parport->serial->disc_mutex); 461 if (mos_parport->serial->disconnected) { 462 /* device disconnected */ 463 mutex_unlock(&mos_parport->serial->disc_mutex); 464 mos_parport->msg_pending = false; 465 complete(&mos_parport->syncmsg_compl); 466 return -1; 467 } 468 469 return 0; 470 } 471 472 /* 473 * This is the common bottom part of all parallel port functions that send 474 * synchronous messages to the device. 475 */ 476 static inline void parport_epilogue(struct parport *pp) 477 { 478 struct mos7715_parport *mos_parport = pp->private_data; 479 mutex_unlock(&mos_parport->serial->disc_mutex); 480 mos_parport->msg_pending = false; 481 complete(&mos_parport->syncmsg_compl); 482 } 483 484 static void parport_mos7715_write_data(struct parport *pp, unsigned char d) 485 { 486 struct mos7715_parport *mos_parport = pp->private_data; 487 488 if (parport_prologue(pp) < 0) 489 return; 490 mos7715_change_mode(mos_parport, SPP); 491 write_mos_reg(mos_parport->serial, dummy, MOS7720_DPR, (__u8)d); 492 parport_epilogue(pp); 493 } 494 495 static unsigned char parport_mos7715_read_data(struct parport *pp) 496 { 497 struct mos7715_parport *mos_parport = pp->private_data; 498 unsigned char d; 499 500 if (parport_prologue(pp) < 0) 501 return 0; 502 read_mos_reg(mos_parport->serial, dummy, MOS7720_DPR, &d); 503 parport_epilogue(pp); 504 return d; 505 } 506 507 static void parport_mos7715_write_control(struct parport *pp, unsigned char d) 508 { 509 struct mos7715_parport *mos_parport = pp->private_data; 510 __u8 data; 511 512 if (parport_prologue(pp) < 0) 513 return; 514 data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); 515 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, data); 516 mos_parport->shadowDCR = data; 517 parport_epilogue(pp); 518 } 519 520 static unsigned char parport_mos7715_read_control(struct parport *pp) 521 { 522 struct mos7715_parport *mos_parport; 523 __u8 dcr; 524 525 spin_lock(&release_lock); 526 mos_parport = pp->private_data; 527 if (unlikely(mos_parport == NULL)) { 528 spin_unlock(&release_lock); 529 return 0; 530 } 531 dcr = mos_parport->shadowDCR & 0x0f; 532 spin_unlock(&release_lock); 533 return dcr; 534 } 535 536 static unsigned char parport_mos7715_frob_control(struct parport *pp, 537 unsigned char mask, 538 unsigned char val) 539 { 540 struct mos7715_parport *mos_parport = pp->private_data; 541 __u8 dcr; 542 543 mask &= 0x0f; 544 val &= 0x0f; 545 if (parport_prologue(pp) < 0) 546 return 0; 547 mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; 548 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, 549 mos_parport->shadowDCR); 550 dcr = mos_parport->shadowDCR & 0x0f; 551 parport_epilogue(pp); 552 return dcr; 553 } 554 555 static unsigned char parport_mos7715_read_status(struct parport *pp) 556 { 557 unsigned char status; 558 struct mos7715_parport *mos_parport; 559 560 spin_lock(&release_lock); 561 mos_parport = pp->private_data; 562 if (unlikely(mos_parport == NULL)) { /* release called */ 563 spin_unlock(&release_lock); 564 return 0; 565 } 566 status = atomic_read(&mos_parport->shadowDSR) & 0xf8; 567 spin_unlock(&release_lock); 568 return status; 569 } 570 571 static void parport_mos7715_enable_irq(struct parport *pp) 572 { 573 } 574 575 static void parport_mos7715_disable_irq(struct parport *pp) 576 { 577 } 578 579 static void parport_mos7715_data_forward(struct parport *pp) 580 { 581 struct mos7715_parport *mos_parport = pp->private_data; 582 583 if (parport_prologue(pp) < 0) 584 return; 585 mos7715_change_mode(mos_parport, PS2); 586 mos_parport->shadowDCR &= ~0x20; 587 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, 588 mos_parport->shadowDCR); 589 parport_epilogue(pp); 590 } 591 592 static void parport_mos7715_data_reverse(struct parport *pp) 593 { 594 struct mos7715_parport *mos_parport = pp->private_data; 595 596 if (parport_prologue(pp) < 0) 597 return; 598 mos7715_change_mode(mos_parport, PS2); 599 mos_parport->shadowDCR |= 0x20; 600 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, 601 mos_parport->shadowDCR); 602 parport_epilogue(pp); 603 } 604 605 static void parport_mos7715_init_state(struct pardevice *dev, 606 struct parport_state *s) 607 { 608 s->u.pc.ctr = DCR_INIT_VAL; 609 s->u.pc.ecr = ECR_INIT_VAL; 610 } 611 612 /* N.B. Parport core code requires that this function not block */ 613 static void parport_mos7715_save_state(struct parport *pp, 614 struct parport_state *s) 615 { 616 struct mos7715_parport *mos_parport; 617 618 spin_lock(&release_lock); 619 mos_parport = pp->private_data; 620 if (unlikely(mos_parport == NULL)) { /* release called */ 621 spin_unlock(&release_lock); 622 return; 623 } 624 s->u.pc.ctr = mos_parport->shadowDCR; 625 s->u.pc.ecr = mos_parport->shadowECR; 626 spin_unlock(&release_lock); 627 } 628 629 /* N.B. Parport core code requires that this function not block */ 630 static void parport_mos7715_restore_state(struct parport *pp, 631 struct parport_state *s) 632 { 633 struct mos7715_parport *mos_parport; 634 635 spin_lock(&release_lock); 636 mos_parport = pp->private_data; 637 if (unlikely(mos_parport == NULL)) { /* release called */ 638 spin_unlock(&release_lock); 639 return; 640 } 641 write_parport_reg_nonblock(mos_parport, MOS7720_DCR, 642 mos_parport->shadowDCR); 643 write_parport_reg_nonblock(mos_parport, MOS7720_ECR, 644 mos_parport->shadowECR); 645 spin_unlock(&release_lock); 646 } 647 648 static size_t parport_mos7715_write_compat(struct parport *pp, 649 const void *buffer, 650 size_t len, int flags) 651 { 652 int retval; 653 struct mos7715_parport *mos_parport = pp->private_data; 654 int actual_len; 655 656 if (parport_prologue(pp) < 0) 657 return 0; 658 mos7715_change_mode(mos_parport, PPF); 659 retval = usb_bulk_msg(mos_parport->serial->dev, 660 usb_sndbulkpipe(mos_parport->serial->dev, 2), 661 (void *)buffer, len, &actual_len, 662 MOS_WDR_TIMEOUT); 663 parport_epilogue(pp); 664 if (retval) { 665 dev_err(&mos_parport->serial->dev->dev, 666 "mos7720: usb_bulk_msg() failed: %d\n", retval); 667 return 0; 668 } 669 return actual_len; 670 } 671 672 static struct parport_operations parport_mos7715_ops = { 673 .owner = THIS_MODULE, 674 .write_data = parport_mos7715_write_data, 675 .read_data = parport_mos7715_read_data, 676 677 .write_control = parport_mos7715_write_control, 678 .read_control = parport_mos7715_read_control, 679 .frob_control = parport_mos7715_frob_control, 680 681 .read_status = parport_mos7715_read_status, 682 683 .enable_irq = parport_mos7715_enable_irq, 684 .disable_irq = parport_mos7715_disable_irq, 685 686 .data_forward = parport_mos7715_data_forward, 687 .data_reverse = parport_mos7715_data_reverse, 688 689 .init_state = parport_mos7715_init_state, 690 .save_state = parport_mos7715_save_state, 691 .restore_state = parport_mos7715_restore_state, 692 693 .compat_write_data = parport_mos7715_write_compat, 694 695 .nibble_read_data = parport_ieee1284_read_nibble, 696 .byte_read_data = parport_ieee1284_read_byte, 697 }; 698 699 /* 700 * Allocate and initialize parallel port control struct, initialize 701 * the parallel port hardware device, and register with the parport subsystem. 702 */ 703 static int mos7715_parport_init(struct usb_serial *serial) 704 { 705 struct mos7715_parport *mos_parport; 706 707 /* allocate and initialize parallel port control struct */ 708 mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL); 709 if (!mos_parport) 710 return -ENOMEM; 711 712 mos_parport->msg_pending = false; 713 kref_init(&mos_parport->ref_count); 714 spin_lock_init(&mos_parport->listlock); 715 INIT_LIST_HEAD(&mos_parport->active_urbs); 716 INIT_LIST_HEAD(&mos_parport->deferred_urbs); 717 usb_set_serial_data(serial, mos_parport); /* hijack private pointer */ 718 mos_parport->serial = serial; 719 tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs, 720 (unsigned long) mos_parport); 721 init_completion(&mos_parport->syncmsg_compl); 722 723 /* cycle parallel port reset bit */ 724 write_mos_reg(mos_parport->serial, dummy, MOS7720_PP_REG, (__u8)0x80); 725 write_mos_reg(mos_parport->serial, dummy, MOS7720_PP_REG, (__u8)0x00); 726 727 /* initialize device registers */ 728 mos_parport->shadowDCR = DCR_INIT_VAL; 729 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, 730 mos_parport->shadowDCR); 731 mos_parport->shadowECR = ECR_INIT_VAL; 732 write_mos_reg(mos_parport->serial, dummy, MOS7720_ECR, 733 mos_parport->shadowECR); 734 735 /* register with parport core */ 736 mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, 737 PARPORT_DMA_NONE, 738 &parport_mos7715_ops); 739 if (mos_parport->pp == NULL) { 740 dev_err(&serial->interface->dev, 741 "Could not register parport\n"); 742 kref_put(&mos_parport->ref_count, destroy_mos_parport); 743 return -EIO; 744 } 745 mos_parport->pp->private_data = mos_parport; 746 mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP; 747 mos_parport->pp->dev = &serial->interface->dev; 748 parport_announce_port(mos_parport->pp); 749 750 return 0; 751 } 752 #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */ 753 754 /* 755 * mos7720_interrupt_callback 756 * this is the callback function for when we have received data on the 757 * interrupt endpoint. 758 */ 759 static void mos7720_interrupt_callback(struct urb *urb) 760 { 761 int result; 762 int length; 763 int status = urb->status; 764 struct device *dev = &urb->dev->dev; 765 __u8 *data; 766 __u8 sp1; 767 __u8 sp2; 768 769 switch (status) { 770 case 0: 771 /* success */ 772 break; 773 case -ECONNRESET: 774 case -ENOENT: 775 case -ESHUTDOWN: 776 /* this urb is terminated, clean up */ 777 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 778 return; 779 default: 780 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 781 goto exit; 782 } 783 784 length = urb->actual_length; 785 data = urb->transfer_buffer; 786 787 /* Moschip get 4 bytes 788 * Byte 1 IIR Port 1 (port.number is 0) 789 * Byte 2 IIR Port 2 (port.number is 1) 790 * Byte 3 -------------- 791 * Byte 4 FIFO status for both */ 792 793 /* the above description is inverted 794 * oneukum 2007-03-14 */ 795 796 if (unlikely(length != 4)) { 797 dev_dbg(dev, "Wrong data !!!\n"); 798 return; 799 } 800 801 sp1 = data[3]; 802 sp2 = data[2]; 803 804 if ((sp1 | sp2) & 0x01) { 805 /* No Interrupt Pending in both the ports */ 806 dev_dbg(dev, "No Interrupt !!!\n"); 807 } else { 808 switch (sp1 & 0x0f) { 809 case SERIAL_IIR_RLS: 810 dev_dbg(dev, "Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n"); 811 break; 812 case SERIAL_IIR_CTI: 813 dev_dbg(dev, "Serial Port 1: Receiver time out\n"); 814 break; 815 case SERIAL_IIR_MS: 816 /* dev_dbg(dev, "Serial Port 1: Modem status change\n"); */ 817 break; 818 } 819 820 switch (sp2 & 0x0f) { 821 case SERIAL_IIR_RLS: 822 dev_dbg(dev, "Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n"); 823 break; 824 case SERIAL_IIR_CTI: 825 dev_dbg(dev, "Serial Port 2: Receiver time out\n"); 826 break; 827 case SERIAL_IIR_MS: 828 /* dev_dbg(dev, "Serial Port 2: Modem status change\n"); */ 829 break; 830 } 831 } 832 833 exit: 834 result = usb_submit_urb(urb, GFP_ATOMIC); 835 if (result) 836 dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); 837 } 838 839 /* 840 * mos7715_interrupt_callback 841 * this is the 7715's callback function for when we have received data on 842 * the interrupt endpoint. 843 */ 844 static void mos7715_interrupt_callback(struct urb *urb) 845 { 846 int result; 847 int length; 848 int status = urb->status; 849 struct device *dev = &urb->dev->dev; 850 __u8 *data; 851 __u8 iir; 852 853 switch (status) { 854 case 0: 855 /* success */ 856 break; 857 case -ECONNRESET: 858 case -ENOENT: 859 case -ESHUTDOWN: 860 case -ENODEV: 861 /* this urb is terminated, clean up */ 862 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 863 return; 864 default: 865 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 866 goto exit; 867 } 868 869 length = urb->actual_length; 870 data = urb->transfer_buffer; 871 872 /* Structure of data from 7715 device: 873 * Byte 1: IIR serial Port 874 * Byte 2: unused 875 * Byte 2: DSR parallel port 876 * Byte 4: FIFO status for both */ 877 878 if (unlikely(length != 4)) { 879 dev_dbg(dev, "Wrong data !!!\n"); 880 return; 881 } 882 883 iir = data[0]; 884 if (!(iir & 0x01)) { /* serial port interrupt pending */ 885 switch (iir & 0x0f) { 886 case SERIAL_IIR_RLS: 887 dev_dbg(dev, "Serial Port: Receiver status error or address bit detected in 9-bit mode\n"); 888 break; 889 case SERIAL_IIR_CTI: 890 dev_dbg(dev, "Serial Port: Receiver time out\n"); 891 break; 892 case SERIAL_IIR_MS: 893 /* dev_dbg(dev, "Serial Port: Modem status change\n"); */ 894 break; 895 } 896 } 897 898 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT 899 { /* update local copy of DSR reg */ 900 struct usb_serial_port *port = urb->context; 901 struct mos7715_parport *mos_parport = port->serial->private; 902 if (unlikely(mos_parport == NULL)) 903 return; 904 atomic_set(&mos_parport->shadowDSR, data[2]); 905 } 906 #endif 907 908 exit: 909 result = usb_submit_urb(urb, GFP_ATOMIC); 910 if (result) 911 dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result); 912 } 913 914 /* 915 * mos7720_bulk_in_callback 916 * this is the callback function for when we have received data on the 917 * bulk in endpoint. 918 */ 919 static void mos7720_bulk_in_callback(struct urb *urb) 920 { 921 int retval; 922 unsigned char *data ; 923 struct usb_serial_port *port; 924 int status = urb->status; 925 926 if (status) { 927 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 928 return; 929 } 930 931 port = urb->context; 932 933 dev_dbg(&port->dev, "Entering...%s\n", __func__); 934 935 data = urb->transfer_buffer; 936 937 if (urb->actual_length) { 938 tty_insert_flip_string(&port->port, data, urb->actual_length); 939 tty_flip_buffer_push(&port->port); 940 } 941 942 if (port->read_urb->status != -EINPROGRESS) { 943 retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); 944 if (retval) 945 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 946 } 947 } 948 949 /* 950 * mos7720_bulk_out_data_callback 951 * this is the callback function for when we have finished sending serial 952 * data on the bulk out endpoint. 953 */ 954 static void mos7720_bulk_out_data_callback(struct urb *urb) 955 { 956 struct moschip_port *mos7720_port; 957 int status = urb->status; 958 959 if (status) { 960 dev_dbg(&urb->dev->dev, "nonzero write bulk status received:%d\n", status); 961 return; 962 } 963 964 mos7720_port = urb->context; 965 if (!mos7720_port) { 966 dev_dbg(&urb->dev->dev, "NULL mos7720_port pointer\n"); 967 return ; 968 } 969 970 if (mos7720_port->open) 971 tty_port_tty_wakeup(&mos7720_port->port->port); 972 } 973 974 static int mos77xx_calc_num_ports(struct usb_serial *serial, 975 struct usb_serial_endpoints *epds) 976 { 977 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); 978 979 if (product == MOSCHIP_DEVICE_ID_7715) { 980 /* 981 * The 7715 uses the first bulk in/out endpoint pair for the 982 * parallel port, and the second for the serial port. We swap 983 * the endpoint descriptors here so that the the first and 984 * only registered port structure uses the serial-port 985 * endpoints. 986 */ 987 swap(epds->bulk_in[0], epds->bulk_in[1]); 988 swap(epds->bulk_out[0], epds->bulk_out[1]); 989 990 return 1; 991 } 992 993 return 2; 994 } 995 996 static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port) 997 { 998 struct usb_serial *serial; 999 struct urb *urb; 1000 struct moschip_port *mos7720_port; 1001 int response; 1002 int port_number; 1003 __u8 data; 1004 int allocated_urbs = 0; 1005 int j; 1006 1007 serial = port->serial; 1008 1009 mos7720_port = usb_get_serial_port_data(port); 1010 if (mos7720_port == NULL) 1011 return -ENODEV; 1012 1013 usb_clear_halt(serial->dev, port->write_urb->pipe); 1014 usb_clear_halt(serial->dev, port->read_urb->pipe); 1015 1016 /* Initialising the write urb pool */ 1017 for (j = 0; j < NUM_URBS; ++j) { 1018 urb = usb_alloc_urb(0, GFP_KERNEL); 1019 mos7720_port->write_urb_pool[j] = urb; 1020 if (!urb) 1021 continue; 1022 1023 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 1024 GFP_KERNEL); 1025 if (!urb->transfer_buffer) { 1026 usb_free_urb(mos7720_port->write_urb_pool[j]); 1027 mos7720_port->write_urb_pool[j] = NULL; 1028 continue; 1029 } 1030 allocated_urbs++; 1031 } 1032 1033 if (!allocated_urbs) 1034 return -ENOMEM; 1035 1036 /* Initialize MCS7720 -- Write Init values to corresponding Registers 1037 * 1038 * Register Index 1039 * 0 : MOS7720_THR/MOS7720_RHR 1040 * 1 : MOS7720_IER 1041 * 2 : MOS7720_FCR 1042 * 3 : MOS7720_LCR 1043 * 4 : MOS7720_MCR 1044 * 5 : MOS7720_LSR 1045 * 6 : MOS7720_MSR 1046 * 7 : MOS7720_SPR 1047 * 1048 * 0x08 : SP1/2 Control Reg 1049 */ 1050 port_number = port->port_number; 1051 read_mos_reg(serial, port_number, MOS7720_LSR, &data); 1052 1053 dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data); 1054 1055 write_mos_reg(serial, dummy, MOS7720_SP1_REG, 0x02); 1056 write_mos_reg(serial, dummy, MOS7720_SP2_REG, 0x02); 1057 1058 write_mos_reg(serial, port_number, MOS7720_IER, 0x00); 1059 write_mos_reg(serial, port_number, MOS7720_FCR, 0x00); 1060 1061 write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf); 1062 mos7720_port->shadowLCR = 0x03; 1063 write_mos_reg(serial, port_number, MOS7720_LCR, 1064 mos7720_port->shadowLCR); 1065 mos7720_port->shadowMCR = 0x0b; 1066 write_mos_reg(serial, port_number, MOS7720_MCR, 1067 mos7720_port->shadowMCR); 1068 1069 write_mos_reg(serial, port_number, MOS7720_SP_CONTROL_REG, 0x00); 1070 read_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, &data); 1071 data = data | (port->port_number + 1); 1072 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, data); 1073 mos7720_port->shadowLCR = 0x83; 1074 write_mos_reg(serial, port_number, MOS7720_LCR, 1075 mos7720_port->shadowLCR); 1076 write_mos_reg(serial, port_number, MOS7720_THR, 0x0c); 1077 write_mos_reg(serial, port_number, MOS7720_IER, 0x00); 1078 mos7720_port->shadowLCR = 0x03; 1079 write_mos_reg(serial, port_number, MOS7720_LCR, 1080 mos7720_port->shadowLCR); 1081 write_mos_reg(serial, port_number, MOS7720_IER, 0x0c); 1082 1083 response = usb_submit_urb(port->read_urb, GFP_KERNEL); 1084 if (response) 1085 dev_err(&port->dev, "%s - Error %d submitting read urb\n", 1086 __func__, response); 1087 1088 /* initialize our port settings */ 1089 mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ 1090 1091 /* send a open port command */ 1092 mos7720_port->open = 1; 1093 1094 return 0; 1095 } 1096 1097 /* 1098 * mos7720_chars_in_buffer 1099 * this function is called by the tty driver when it wants to know how many 1100 * bytes of data we currently have outstanding in the port (data that has 1101 * been written, but hasn't made it out the port yet) 1102 * If successful, we return the number of bytes left to be written in the 1103 * system, 1104 * Otherwise we return a negative error number. 1105 */ 1106 static int mos7720_chars_in_buffer(struct tty_struct *tty) 1107 { 1108 struct usb_serial_port *port = tty->driver_data; 1109 int i; 1110 int chars = 0; 1111 struct moschip_port *mos7720_port; 1112 1113 mos7720_port = usb_get_serial_port_data(port); 1114 if (mos7720_port == NULL) 1115 return 0; 1116 1117 for (i = 0; i < NUM_URBS; ++i) { 1118 if (mos7720_port->write_urb_pool[i] && 1119 mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) 1120 chars += URB_TRANSFER_BUFFER_SIZE; 1121 } 1122 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1123 return chars; 1124 } 1125 1126 static void mos7720_close(struct usb_serial_port *port) 1127 { 1128 struct usb_serial *serial; 1129 struct moschip_port *mos7720_port; 1130 int j; 1131 1132 serial = port->serial; 1133 1134 mos7720_port = usb_get_serial_port_data(port); 1135 if (mos7720_port == NULL) 1136 return; 1137 1138 for (j = 0; j < NUM_URBS; ++j) 1139 usb_kill_urb(mos7720_port->write_urb_pool[j]); 1140 1141 /* Freeing Write URBs */ 1142 for (j = 0; j < NUM_URBS; ++j) { 1143 if (mos7720_port->write_urb_pool[j]) { 1144 kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); 1145 usb_free_urb(mos7720_port->write_urb_pool[j]); 1146 } 1147 } 1148 1149 /* While closing port, shutdown all bulk read, write * 1150 * and interrupt read if they exists, otherwise nop */ 1151 usb_kill_urb(port->write_urb); 1152 usb_kill_urb(port->read_urb); 1153 1154 write_mos_reg(serial, port->port_number, MOS7720_MCR, 0x00); 1155 write_mos_reg(serial, port->port_number, MOS7720_IER, 0x00); 1156 1157 mos7720_port->open = 0; 1158 } 1159 1160 static void mos7720_break(struct tty_struct *tty, int break_state) 1161 { 1162 struct usb_serial_port *port = tty->driver_data; 1163 unsigned char data; 1164 struct usb_serial *serial; 1165 struct moschip_port *mos7720_port; 1166 1167 serial = port->serial; 1168 1169 mos7720_port = usb_get_serial_port_data(port); 1170 if (mos7720_port == NULL) 1171 return; 1172 1173 if (break_state == -1) 1174 data = mos7720_port->shadowLCR | UART_LCR_SBC; 1175 else 1176 data = mos7720_port->shadowLCR & ~UART_LCR_SBC; 1177 1178 mos7720_port->shadowLCR = data; 1179 write_mos_reg(serial, port->port_number, MOS7720_LCR, 1180 mos7720_port->shadowLCR); 1181 } 1182 1183 /* 1184 * mos7720_write_room 1185 * this function is called by the tty driver when it wants to know how many 1186 * bytes of data we can accept for a specific port. 1187 * If successful, we return the amount of room that we have for this port 1188 * Otherwise we return a negative error number. 1189 */ 1190 static int mos7720_write_room(struct tty_struct *tty) 1191 { 1192 struct usb_serial_port *port = tty->driver_data; 1193 struct moschip_port *mos7720_port; 1194 int room = 0; 1195 int i; 1196 1197 mos7720_port = usb_get_serial_port_data(port); 1198 if (mos7720_port == NULL) 1199 return -ENODEV; 1200 1201 /* FIXME: Locking */ 1202 for (i = 0; i < NUM_URBS; ++i) { 1203 if (mos7720_port->write_urb_pool[i] && 1204 mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) 1205 room += URB_TRANSFER_BUFFER_SIZE; 1206 } 1207 1208 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); 1209 return room; 1210 } 1211 1212 static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port, 1213 const unsigned char *data, int count) 1214 { 1215 int status; 1216 int i; 1217 int bytes_sent = 0; 1218 int transfer_size; 1219 1220 struct moschip_port *mos7720_port; 1221 struct usb_serial *serial; 1222 struct urb *urb; 1223 const unsigned char *current_position = data; 1224 1225 serial = port->serial; 1226 1227 mos7720_port = usb_get_serial_port_data(port); 1228 if (mos7720_port == NULL) 1229 return -ENODEV; 1230 1231 /* try to find a free urb in the list */ 1232 urb = NULL; 1233 1234 for (i = 0; i < NUM_URBS; ++i) { 1235 if (mos7720_port->write_urb_pool[i] && 1236 mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { 1237 urb = mos7720_port->write_urb_pool[i]; 1238 dev_dbg(&port->dev, "URB:%d\n", i); 1239 break; 1240 } 1241 } 1242 1243 if (urb == NULL) { 1244 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1245 goto exit; 1246 } 1247 1248 if (urb->transfer_buffer == NULL) { 1249 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 1250 GFP_ATOMIC); 1251 if (!urb->transfer_buffer) 1252 goto exit; 1253 } 1254 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1255 1256 memcpy(urb->transfer_buffer, current_position, transfer_size); 1257 usb_serial_debug_data(&port->dev, __func__, transfer_size, 1258 urb->transfer_buffer); 1259 1260 /* fill urb with data and submit */ 1261 usb_fill_bulk_urb(urb, serial->dev, 1262 usb_sndbulkpipe(serial->dev, 1263 port->bulk_out_endpointAddress), 1264 urb->transfer_buffer, transfer_size, 1265 mos7720_bulk_out_data_callback, mos7720_port); 1266 1267 /* send it down the pipe */ 1268 status = usb_submit_urb(urb, GFP_ATOMIC); 1269 if (status) { 1270 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1271 "with status = %d\n", __func__, status); 1272 bytes_sent = status; 1273 goto exit; 1274 } 1275 bytes_sent = transfer_size; 1276 1277 exit: 1278 return bytes_sent; 1279 } 1280 1281 static void mos7720_throttle(struct tty_struct *tty) 1282 { 1283 struct usb_serial_port *port = tty->driver_data; 1284 struct moschip_port *mos7720_port; 1285 int status; 1286 1287 mos7720_port = usb_get_serial_port_data(port); 1288 1289 if (mos7720_port == NULL) 1290 return; 1291 1292 if (!mos7720_port->open) { 1293 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1294 return; 1295 } 1296 1297 /* if we are implementing XON/XOFF, send the stop character */ 1298 if (I_IXOFF(tty)) { 1299 unsigned char stop_char = STOP_CHAR(tty); 1300 status = mos7720_write(tty, port, &stop_char, 1); 1301 if (status <= 0) 1302 return; 1303 } 1304 1305 /* if we are implementing RTS/CTS, toggle that line */ 1306 if (C_CRTSCTS(tty)) { 1307 mos7720_port->shadowMCR &= ~UART_MCR_RTS; 1308 write_mos_reg(port->serial, port->port_number, MOS7720_MCR, 1309 mos7720_port->shadowMCR); 1310 } 1311 } 1312 1313 static void mos7720_unthrottle(struct tty_struct *tty) 1314 { 1315 struct usb_serial_port *port = tty->driver_data; 1316 struct moschip_port *mos7720_port = usb_get_serial_port_data(port); 1317 int status; 1318 1319 if (mos7720_port == NULL) 1320 return; 1321 1322 if (!mos7720_port->open) { 1323 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1324 return; 1325 } 1326 1327 /* if we are implementing XON/XOFF, send the start character */ 1328 if (I_IXOFF(tty)) { 1329 unsigned char start_char = START_CHAR(tty); 1330 status = mos7720_write(tty, port, &start_char, 1); 1331 if (status <= 0) 1332 return; 1333 } 1334 1335 /* if we are implementing RTS/CTS, toggle that line */ 1336 if (C_CRTSCTS(tty)) { 1337 mos7720_port->shadowMCR |= UART_MCR_RTS; 1338 write_mos_reg(port->serial, port->port_number, MOS7720_MCR, 1339 mos7720_port->shadowMCR); 1340 } 1341 } 1342 1343 /* FIXME: this function does not work */ 1344 static int set_higher_rates(struct moschip_port *mos7720_port, 1345 unsigned int baud) 1346 { 1347 struct usb_serial_port *port; 1348 struct usb_serial *serial; 1349 int port_number; 1350 enum mos_regs sp_reg; 1351 if (mos7720_port == NULL) 1352 return -EINVAL; 1353 1354 port = mos7720_port->port; 1355 serial = port->serial; 1356 1357 /*********************************************** 1358 * Init Sequence for higher rates 1359 ***********************************************/ 1360 dev_dbg(&port->dev, "Sending Setting Commands ..........\n"); 1361 port_number = port->port_number; 1362 1363 write_mos_reg(serial, port_number, MOS7720_IER, 0x00); 1364 write_mos_reg(serial, port_number, MOS7720_FCR, 0x00); 1365 write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf); 1366 mos7720_port->shadowMCR = 0x0b; 1367 write_mos_reg(serial, port_number, MOS7720_MCR, 1368 mos7720_port->shadowMCR); 1369 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 0x00); 1370 1371 /*********************************************** 1372 * Set for higher rates * 1373 ***********************************************/ 1374 /* writing baud rate verbatum into uart clock field clearly not right */ 1375 if (port_number == 0) 1376 sp_reg = MOS7720_SP1_REG; 1377 else 1378 sp_reg = MOS7720_SP2_REG; 1379 write_mos_reg(serial, dummy, sp_reg, baud * 0x10); 1380 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 0x03); 1381 mos7720_port->shadowMCR = 0x2b; 1382 write_mos_reg(serial, port_number, MOS7720_MCR, 1383 mos7720_port->shadowMCR); 1384 1385 /*********************************************** 1386 * Set DLL/DLM 1387 ***********************************************/ 1388 mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; 1389 write_mos_reg(serial, port_number, MOS7720_LCR, 1390 mos7720_port->shadowLCR); 1391 write_mos_reg(serial, port_number, MOS7720_DLL, 0x01); 1392 write_mos_reg(serial, port_number, MOS7720_DLM, 0x00); 1393 mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; 1394 write_mos_reg(serial, port_number, MOS7720_LCR, 1395 mos7720_port->shadowLCR); 1396 1397 return 0; 1398 } 1399 1400 /* baud rate information */ 1401 struct divisor_table_entry { 1402 __u32 baudrate; 1403 __u16 divisor; 1404 }; 1405 1406 /* Define table of divisors for moschip 7720 hardware * 1407 * These assume a 3.6864MHz crystal, the standard /16, and * 1408 * MCR.7 = 0. */ 1409 static const struct divisor_table_entry divisor_table[] = { 1410 { 50, 2304}, 1411 { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ 1412 { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ 1413 { 150, 768}, 1414 { 300, 384}, 1415 { 600, 192}, 1416 { 1200, 96}, 1417 { 1800, 64}, 1418 { 2400, 48}, 1419 { 4800, 24}, 1420 { 7200, 16}, 1421 { 9600, 12}, 1422 { 19200, 6}, 1423 { 38400, 3}, 1424 { 57600, 2}, 1425 { 115200, 1}, 1426 }; 1427 1428 /***************************************************************************** 1429 * calc_baud_rate_divisor 1430 * this function calculates the proper baud rate divisor for the specified 1431 * baud rate. 1432 *****************************************************************************/ 1433 static int calc_baud_rate_divisor(struct usb_serial_port *port, int baudrate, int *divisor) 1434 { 1435 int i; 1436 __u16 custom; 1437 __u16 round1; 1438 __u16 round; 1439 1440 1441 dev_dbg(&port->dev, "%s - %d\n", __func__, baudrate); 1442 1443 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { 1444 if (divisor_table[i].baudrate == baudrate) { 1445 *divisor = divisor_table[i].divisor; 1446 return 0; 1447 } 1448 } 1449 1450 /* After trying for all the standard baud rates * 1451 * Try calculating the divisor for this baud rate */ 1452 if (baudrate > 75 && baudrate < 230400) { 1453 /* get the divisor */ 1454 custom = (__u16)(230400L / baudrate); 1455 1456 /* Check for round off */ 1457 round1 = (__u16)(2304000L / baudrate); 1458 round = (__u16)(round1 - (custom * 10)); 1459 if (round > 4) 1460 custom++; 1461 *divisor = custom; 1462 1463 dev_dbg(&port->dev, "Baud %d = %d\n", baudrate, custom); 1464 return 0; 1465 } 1466 1467 dev_dbg(&port->dev, "Baud calculation Failed...\n"); 1468 return -EINVAL; 1469 } 1470 1471 /* 1472 * send_cmd_write_baud_rate 1473 * this function sends the proper command to change the baud rate of the 1474 * specified port. 1475 */ 1476 static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, 1477 int baudrate) 1478 { 1479 struct usb_serial_port *port; 1480 struct usb_serial *serial; 1481 int divisor; 1482 int status; 1483 unsigned char number; 1484 1485 if (mos7720_port == NULL) 1486 return -1; 1487 1488 port = mos7720_port->port; 1489 serial = port->serial; 1490 1491 number = port->port_number; 1492 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate); 1493 1494 /* Calculate the Divisor */ 1495 status = calc_baud_rate_divisor(port, baudrate, &divisor); 1496 if (status) { 1497 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1498 return status; 1499 } 1500 1501 /* Enable access to divisor latch */ 1502 mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB; 1503 write_mos_reg(serial, number, MOS7720_LCR, mos7720_port->shadowLCR); 1504 1505 /* Write the divisor */ 1506 write_mos_reg(serial, number, MOS7720_DLL, (__u8)(divisor & 0xff)); 1507 write_mos_reg(serial, number, MOS7720_DLM, 1508 (__u8)((divisor & 0xff00) >> 8)); 1509 1510 /* Disable access to divisor latch */ 1511 mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB; 1512 write_mos_reg(serial, number, MOS7720_LCR, mos7720_port->shadowLCR); 1513 1514 return status; 1515 } 1516 1517 /* 1518 * change_port_settings 1519 * This routine is called to set the UART on the device to match 1520 * the specified new settings. 1521 */ 1522 static void change_port_settings(struct tty_struct *tty, 1523 struct moschip_port *mos7720_port, 1524 struct ktermios *old_termios) 1525 { 1526 struct usb_serial_port *port; 1527 struct usb_serial *serial; 1528 int baud; 1529 unsigned cflag; 1530 __u8 lData; 1531 __u8 lParity; 1532 __u8 lStop; 1533 int status; 1534 int port_number; 1535 1536 if (mos7720_port == NULL) 1537 return ; 1538 1539 port = mos7720_port->port; 1540 serial = port->serial; 1541 port_number = port->port_number; 1542 1543 if (!mos7720_port->open) { 1544 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1545 return; 1546 } 1547 1548 lData = UART_LCR_WLEN8; 1549 lStop = 0x00; /* 1 stop bit */ 1550 lParity = 0x00; /* No parity */ 1551 1552 cflag = tty->termios.c_cflag; 1553 1554 /* Change the number of bits */ 1555 switch (cflag & CSIZE) { 1556 case CS5: 1557 lData = UART_LCR_WLEN5; 1558 break; 1559 1560 case CS6: 1561 lData = UART_LCR_WLEN6; 1562 break; 1563 1564 case CS7: 1565 lData = UART_LCR_WLEN7; 1566 break; 1567 default: 1568 case CS8: 1569 lData = UART_LCR_WLEN8; 1570 break; 1571 } 1572 1573 /* Change the Parity bit */ 1574 if (cflag & PARENB) { 1575 if (cflag & PARODD) { 1576 lParity = UART_LCR_PARITY; 1577 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1578 } else { 1579 lParity = (UART_LCR_EPAR | UART_LCR_PARITY); 1580 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1581 } 1582 1583 } else { 1584 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1585 } 1586 1587 if (cflag & CMSPAR) 1588 lParity = lParity | 0x20; 1589 1590 /* Change the Stop bit */ 1591 if (cflag & CSTOPB) { 1592 lStop = UART_LCR_STOP; 1593 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1594 } else { 1595 lStop = 0x00; 1596 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1597 } 1598 1599 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 1600 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 1601 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 1602 1603 /* Update the LCR with the correct value */ 1604 mos7720_port->shadowLCR &= 1605 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1606 mos7720_port->shadowLCR |= (lData | lParity | lStop); 1607 1608 1609 /* Disable Interrupts */ 1610 write_mos_reg(serial, port_number, MOS7720_IER, 0x00); 1611 write_mos_reg(serial, port_number, MOS7720_FCR, 0x00); 1612 write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf); 1613 1614 /* Send the updated LCR value to the mos7720 */ 1615 write_mos_reg(serial, port_number, MOS7720_LCR, 1616 mos7720_port->shadowLCR); 1617 mos7720_port->shadowMCR = 0x0b; 1618 write_mos_reg(serial, port_number, MOS7720_MCR, 1619 mos7720_port->shadowMCR); 1620 1621 /* set up the MCR register and send it to the mos7720 */ 1622 mos7720_port->shadowMCR = UART_MCR_OUT2; 1623 if (cflag & CBAUD) 1624 mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); 1625 1626 if (cflag & CRTSCTS) { 1627 mos7720_port->shadowMCR |= (UART_MCR_XONANY); 1628 /* To set hardware flow control to the specified * 1629 * serial port, in SP1/2_CONTROL_REG */ 1630 if (port_number) 1631 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 1632 0x01); 1633 else 1634 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 1635 0x02); 1636 1637 } else 1638 mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); 1639 1640 write_mos_reg(serial, port_number, MOS7720_MCR, 1641 mos7720_port->shadowMCR); 1642 1643 /* Determine divisor based on baud rate */ 1644 baud = tty_get_baud_rate(tty); 1645 if (!baud) { 1646 /* pick a default, any default... */ 1647 dev_dbg(&port->dev, "Picked default baud...\n"); 1648 baud = 9600; 1649 } 1650 1651 if (baud >= 230400) { 1652 set_higher_rates(mos7720_port, baud); 1653 /* Enable Interrupts */ 1654 write_mos_reg(serial, port_number, MOS7720_IER, 0x0c); 1655 return; 1656 } 1657 1658 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1659 status = send_cmd_write_baud_rate(mos7720_port, baud); 1660 /* FIXME: needs to write actual resulting baud back not just 1661 blindly do so */ 1662 if (cflag & CBAUD) 1663 tty_encode_baud_rate(tty, baud, baud); 1664 /* Enable Interrupts */ 1665 write_mos_reg(serial, port_number, MOS7720_IER, 0x0c); 1666 1667 if (port->read_urb->status != -EINPROGRESS) { 1668 status = usb_submit_urb(port->read_urb, GFP_KERNEL); 1669 if (status) 1670 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); 1671 } 1672 } 1673 1674 /* 1675 * mos7720_set_termios 1676 * this function is called by the tty driver when it wants to change the 1677 * termios structure. 1678 */ 1679 static void mos7720_set_termios(struct tty_struct *tty, 1680 struct usb_serial_port *port, struct ktermios *old_termios) 1681 { 1682 int status; 1683 struct moschip_port *mos7720_port; 1684 1685 mos7720_port = usb_get_serial_port_data(port); 1686 1687 if (mos7720_port == NULL) 1688 return; 1689 1690 if (!mos7720_port->open) { 1691 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1692 return; 1693 } 1694 1695 /* change the port settings to the new ones specified */ 1696 change_port_settings(tty, mos7720_port, old_termios); 1697 1698 if (port->read_urb->status != -EINPROGRESS) { 1699 status = usb_submit_urb(port->read_urb, GFP_KERNEL); 1700 if (status) 1701 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); 1702 } 1703 } 1704 1705 /* 1706 * get_lsr_info - get line status register info 1707 * 1708 * Purpose: Let user call ioctl() to get info when the UART physically 1709 * is emptied. On bus types like RS485, the transmitter must 1710 * release the bus after transmitting. This must be done when 1711 * the transmit shift register is empty, not be done when the 1712 * transmit holding register is empty. This functionality 1713 * allows an RS485 driver to be written in user space. 1714 */ 1715 static int get_lsr_info(struct tty_struct *tty, 1716 struct moschip_port *mos7720_port, unsigned int __user *value) 1717 { 1718 struct usb_serial_port *port = tty->driver_data; 1719 unsigned int result = 0; 1720 unsigned char data = 0; 1721 int port_number = port->port_number; 1722 int count; 1723 1724 count = mos7720_chars_in_buffer(tty); 1725 if (count == 0) { 1726 read_mos_reg(port->serial, port_number, MOS7720_LSR, &data); 1727 if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) 1728 == (UART_LSR_TEMT | UART_LSR_THRE)) { 1729 dev_dbg(&port->dev, "%s -- Empty\n", __func__); 1730 result = TIOCSER_TEMT; 1731 } 1732 } 1733 if (copy_to_user(value, &result, sizeof(int))) 1734 return -EFAULT; 1735 return 0; 1736 } 1737 1738 static int mos7720_tiocmget(struct tty_struct *tty) 1739 { 1740 struct usb_serial_port *port = tty->driver_data; 1741 struct moschip_port *mos7720_port = usb_get_serial_port_data(port); 1742 unsigned int result = 0; 1743 unsigned int mcr ; 1744 unsigned int msr ; 1745 1746 mcr = mos7720_port->shadowMCR; 1747 msr = mos7720_port->shadowMSR; 1748 1749 result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ 1750 | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ 1751 | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ 1752 | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */ 1753 | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ 1754 | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ 1755 1756 return result; 1757 } 1758 1759 static int mos7720_tiocmset(struct tty_struct *tty, 1760 unsigned int set, unsigned int clear) 1761 { 1762 struct usb_serial_port *port = tty->driver_data; 1763 struct moschip_port *mos7720_port = usb_get_serial_port_data(port); 1764 unsigned int mcr ; 1765 1766 mcr = mos7720_port->shadowMCR; 1767 1768 if (set & TIOCM_RTS) 1769 mcr |= UART_MCR_RTS; 1770 if (set & TIOCM_DTR) 1771 mcr |= UART_MCR_DTR; 1772 if (set & TIOCM_LOOP) 1773 mcr |= UART_MCR_LOOP; 1774 1775 if (clear & TIOCM_RTS) 1776 mcr &= ~UART_MCR_RTS; 1777 if (clear & TIOCM_DTR) 1778 mcr &= ~UART_MCR_DTR; 1779 if (clear & TIOCM_LOOP) 1780 mcr &= ~UART_MCR_LOOP; 1781 1782 mos7720_port->shadowMCR = mcr; 1783 write_mos_reg(port->serial, port->port_number, MOS7720_MCR, 1784 mos7720_port->shadowMCR); 1785 1786 return 0; 1787 } 1788 1789 static int get_serial_info(struct tty_struct *tty, 1790 struct serial_struct *ss) 1791 { 1792 struct usb_serial_port *port = tty->driver_data; 1793 struct moschip_port *mos7720_port = usb_get_serial_port_data(port); 1794 1795 ss->type = PORT_16550A; 1796 ss->line = mos7720_port->port->minor; 1797 ss->port = mos7720_port->port->port_number; 1798 ss->irq = 0; 1799 ss->xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 1800 ss->baud_base = 9600; 1801 ss->close_delay = 5*HZ; 1802 ss->closing_wait = 30*HZ; 1803 return 0; 1804 } 1805 1806 static int mos7720_ioctl(struct tty_struct *tty, 1807 unsigned int cmd, unsigned long arg) 1808 { 1809 struct usb_serial_port *port = tty->driver_data; 1810 struct moschip_port *mos7720_port; 1811 1812 mos7720_port = usb_get_serial_port_data(port); 1813 if (mos7720_port == NULL) 1814 return -ENODEV; 1815 1816 switch (cmd) { 1817 case TIOCSERGETLSR: 1818 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 1819 return get_lsr_info(tty, mos7720_port, 1820 (unsigned int __user *)arg); 1821 } 1822 1823 return -ENOIOCTLCMD; 1824 } 1825 1826 static int mos7720_startup(struct usb_serial *serial) 1827 { 1828 struct usb_device *dev; 1829 char data; 1830 u16 product; 1831 int ret_val; 1832 1833 product = le16_to_cpu(serial->dev->descriptor.idProduct); 1834 dev = serial->dev; 1835 1836 /* setting configuration feature to one */ 1837 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1838 (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000); 1839 1840 if (product == MOSCHIP_DEVICE_ID_7715) { 1841 struct urb *urb = serial->port[0]->interrupt_in_urb; 1842 1843 urb->complete = mos7715_interrupt_callback; 1844 1845 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT 1846 ret_val = mos7715_parport_init(serial); 1847 if (ret_val < 0) 1848 return ret_val; 1849 #endif 1850 } 1851 /* start the interrupt urb */ 1852 ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL); 1853 if (ret_val) { 1854 dev_err(&dev->dev, "failed to submit interrupt urb: %d\n", 1855 ret_val); 1856 } 1857 1858 /* LSR For Port 1 */ 1859 read_mos_reg(serial, 0, MOS7720_LSR, &data); 1860 dev_dbg(&dev->dev, "LSR:%x\n", data); 1861 1862 return 0; 1863 } 1864 1865 static void mos7720_release(struct usb_serial *serial) 1866 { 1867 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1868 1869 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT 1870 /* close the parallel port */ 1871 1872 if (le16_to_cpu(serial->dev->descriptor.idProduct) 1873 == MOSCHIP_DEVICE_ID_7715) { 1874 struct urbtracker *urbtrack; 1875 unsigned long flags; 1876 struct mos7715_parport *mos_parport = 1877 usb_get_serial_data(serial); 1878 1879 /* prevent NULL ptr dereference in port callbacks */ 1880 spin_lock(&release_lock); 1881 mos_parport->pp->private_data = NULL; 1882 spin_unlock(&release_lock); 1883 1884 /* wait for synchronous usb calls to return */ 1885 if (mos_parport->msg_pending) 1886 wait_for_completion_timeout(&mos_parport->syncmsg_compl, 1887 msecs_to_jiffies(MOS_WDR_TIMEOUT)); 1888 1889 parport_remove_port(mos_parport->pp); 1890 usb_set_serial_data(serial, NULL); 1891 mos_parport->serial = NULL; 1892 1893 /* if tasklet currently scheduled, wait for it to complete */ 1894 tasklet_kill(&mos_parport->urb_tasklet); 1895 1896 /* unlink any urbs sent by the tasklet */ 1897 spin_lock_irqsave(&mos_parport->listlock, flags); 1898 list_for_each_entry(urbtrack, 1899 &mos_parport->active_urbs, 1900 urblist_entry) 1901 usb_unlink_urb(urbtrack->urb); 1902 spin_unlock_irqrestore(&mos_parport->listlock, flags); 1903 parport_del_port(mos_parport->pp); 1904 1905 kref_put(&mos_parport->ref_count, destroy_mos_parport); 1906 } 1907 #endif 1908 } 1909 1910 static int mos7720_port_probe(struct usb_serial_port *port) 1911 { 1912 struct moschip_port *mos7720_port; 1913 1914 mos7720_port = kzalloc(sizeof(*mos7720_port), GFP_KERNEL); 1915 if (!mos7720_port) 1916 return -ENOMEM; 1917 1918 mos7720_port->port = port; 1919 1920 usb_set_serial_port_data(port, mos7720_port); 1921 1922 return 0; 1923 } 1924 1925 static int mos7720_port_remove(struct usb_serial_port *port) 1926 { 1927 struct moschip_port *mos7720_port; 1928 1929 mos7720_port = usb_get_serial_port_data(port); 1930 kfree(mos7720_port); 1931 1932 return 0; 1933 } 1934 1935 static struct usb_serial_driver moschip7720_2port_driver = { 1936 .driver = { 1937 .owner = THIS_MODULE, 1938 .name = "moschip7720", 1939 }, 1940 .description = "Moschip 2 port adapter", 1941 .id_table = id_table, 1942 .num_bulk_in = 2, 1943 .num_bulk_out = 2, 1944 .num_interrupt_in = 1, 1945 .calc_num_ports = mos77xx_calc_num_ports, 1946 .open = mos7720_open, 1947 .close = mos7720_close, 1948 .throttle = mos7720_throttle, 1949 .unthrottle = mos7720_unthrottle, 1950 .attach = mos7720_startup, 1951 .release = mos7720_release, 1952 .port_probe = mos7720_port_probe, 1953 .port_remove = mos7720_port_remove, 1954 .ioctl = mos7720_ioctl, 1955 .tiocmget = mos7720_tiocmget, 1956 .tiocmset = mos7720_tiocmset, 1957 .get_serial = get_serial_info, 1958 .set_termios = mos7720_set_termios, 1959 .write = mos7720_write, 1960 .write_room = mos7720_write_room, 1961 .chars_in_buffer = mos7720_chars_in_buffer, 1962 .break_ctl = mos7720_break, 1963 .read_bulk_callback = mos7720_bulk_in_callback, 1964 .read_int_callback = mos7720_interrupt_callback, 1965 }; 1966 1967 static struct usb_serial_driver * const serial_drivers[] = { 1968 &moschip7720_2port_driver, NULL 1969 }; 1970 1971 module_usb_serial_driver(serial_drivers, id_table); 1972 1973 MODULE_AUTHOR(DRIVER_AUTHOR); 1974 MODULE_DESCRIPTION(DRIVER_DESC); 1975 MODULE_LICENSE("GPL v2"); 1976