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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 | #include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/usb.h>
#include <asm/atomic.h>
#include <linux/blk.h>
#include "../../scsi/scsi.h"
#include "../../scsi/hosts.h"
#include "hpusbscsi.h"
#define DEBUG(x...) \
printk( KERN_DEBUG x )
static char *states[]={"FREE", "BEGINNING", "WORKING", "ERROR", "WAIT", "PREMATURE"};
#define TRACE_STATE printk(KERN_DEBUG"hpusbscsi->state = %s at line %d\n", states[hpusbscsi->state], __LINE__)
/* global variables */
struct list_head hpusbscsi_devices;
//LIST_HEAD(hpusbscsi_devices);
/* USB related parts */
static int
hpusbscsi_usb_probe (struct usb_interface *intf,
const struct usb_device_id *id)
{
struct hpusbscsi *new;
struct usb_device *dev = interface_to_usbdev (intf);
struct usb_host_interface *altsetting =
&(intf->altsetting[0]);
int i, result;
/* basic check */
if (altsetting->desc.bNumEndpoints != 3) {
printk (KERN_ERR "Wrong number of endpoints\n");
return -ENODEV;
}
/* descriptor allocation */
new =
(struct hpusbscsi *) kmalloc (sizeof (struct hpusbscsi),
GFP_KERNEL);
if (new == NULL)
return -ENOMEM;
DEBUG ("Allocated memory\n");
memset (new, 0, sizeof (struct hpusbscsi));
new->dataurb = usb_alloc_urb(0, GFP_KERNEL);
if (!new->dataurb) {
kfree (new);
return -ENOMEM;
}
new->controlurb = usb_alloc_urb(0, GFP_KERNEL);
if (!new->controlurb) {
usb_free_urb (new->dataurb);
kfree (new);
return -ENOMEM;
}
new->dev = dev;
init_waitqueue_head (&new->pending);
init_waitqueue_head (&new->deathrow);
INIT_LIST_HEAD (&new->lh);
/* finding endpoints */
for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
if (
(altsetting->endpoint[i].desc.
bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
USB_ENDPOINT_XFER_BULK) {
if (altsetting->endpoint[i].desc.
bEndpointAddress & USB_DIR_IN) {
new->ep_in =
altsetting->endpoint[i].desc.
bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
} else {
new->ep_out =
altsetting->endpoint[i].desc.
bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
}
} else {
new->ep_int =
altsetting->endpoint[i].desc.
bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
new->interrupt_interval= altsetting->endpoint[i].desc.bInterval;
}
}
/* USB initialisation magic for the simple case */
result = usb_set_interface (dev, altsetting->desc.bInterfaceNumber, 0);
switch (result) {
case 0: /* no error */
break;
default:
printk (KERN_ERR "unknown error %d from usb_set_interface\n",
result);
goto err_out;
}
/* making a template for the scsi layer to fake detection of a scsi device */
memcpy (&(new->ctempl), &hpusbscsi_scsi_host_template,
sizeof (hpusbscsi_scsi_host_template));
(struct hpusbscsi *) new->ctempl.proc_dir = new;
new->ctempl.module = THIS_MODULE;
if (scsi_register_host(&new->ctempl))
goto err_out;
new->sense_command[0] = REQUEST_SENSE;
new->sense_command[4] = HPUSBSCSI_SENSE_LENGTH;
/* adding to list for module unload */
list_add (&hpusbscsi_devices, &new->lh);
usb_set_intfdata(intf, new);
return 0;
err_out:
usb_free_urb (new->controlurb);
usb_free_urb (new->dataurb);
kfree (new);
return -ENODEV;
}
static void
hpusbscsi_usb_disconnect (struct usb_interface *intf)
{
struct hpusbscsi *desc = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
if (desc)
usb_unlink_urb(desc->controlurb);
}
static struct usb_device_id hpusbscsi_usb_ids[] = {
{USB_DEVICE (0x03f0, 0x0701)}, /* HP 53xx */
{USB_DEVICE (0x03f0, 0x0801)}, /* HP 7400 */
{USB_DEVICE (0x0638, 0x0268)}, /*iVina 1200U */
{USB_DEVICE (0x0638, 0x026a)}, /*Scan Dual II */
{USB_DEVICE (0x0638, 0x0A13)}, /*Avision AV600U */
{USB_DEVICE (0x0638, 0x0A16)}, /*Avision DS610CU Scancopier */
{USB_DEVICE (0x0638, 0x0A18)}, /*Avision AV600U Plus */
{USB_DEVICE (0x0638, 0x0A23)}, /*Avision AV220 */
{USB_DEVICE (0x0638, 0x0A24)}, /*Avision AV210 */
{USB_DEVICE (0x0686, 0x4004)}, /*Minolta Elite II */
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, hpusbscsi_usb_ids);
MODULE_LICENSE("GPL");
static struct usb_driver hpusbscsi_usb_driver = {
.name ="hpusbscsi",
.probe =hpusbscsi_usb_probe,
.disconnect =hpusbscsi_usb_disconnect,
.id_table =hpusbscsi_usb_ids,
};
/* module initialisation */
int __init
hpusbscsi_init (void)
{
int result;
INIT_LIST_HEAD (&hpusbscsi_devices);
DEBUG ("Driver loaded\n");
if ((result = usb_register (&hpusbscsi_usb_driver)) < 0) {
printk (KERN_ERR "hpusbscsi: driver registration failed\n");
return -1;
} else {
return 0;
}
}
void __exit
hpusbscsi_exit (void)
{
struct list_head *tmp;
struct list_head *old;
struct hpusbscsi * o;
for (tmp = hpusbscsi_devices.next; tmp != &hpusbscsi_devices;/*nothing */) {
old = tmp;
tmp = tmp->next;
o = (struct hpusbscsi *)old;
usb_unlink_urb(o->controlurb);
scsi_unregister_host(&o->ctempl);
usb_free_urb(o->controlurb);
usb_free_urb(o->dataurb);
kfree(old);
}
usb_deregister (&hpusbscsi_usb_driver);
}
module_init (hpusbscsi_init);
module_exit (hpusbscsi_exit);
/* interface to the scsi layer */
static int
hpusbscsi_scsi_detect (struct SHT *sht)
{
/* Whole function stolen from usb-storage */
struct hpusbscsi *desc = (struct hpusbscsi *) sht->proc_dir;
/* What a hideous hack! */
char local_name[48];
/* set up the name of our subdirectory under /proc/scsi/ */
sprintf (local_name, "hpusbscsi-%d", desc->number);
sht->proc_name = kmalloc (strlen (local_name) + 1, GFP_KERNEL);
/* FIXME: where is this freed ? */
if (!sht->proc_name) {
return 0;
}
strcpy (sht->proc_name, local_name);
sht->proc_dir = NULL;
/* build and submit an interrupt URB for status byte handling */
usb_fill_int_urb(desc->controlurb,
desc->dev,
usb_rcvintpipe(desc->dev,desc->ep_int),
&desc->scsi_state_byte,
1,
control_interrupt_callback,
desc,
desc->interrupt_interval
);
if ( 0 > usb_submit_urb(desc->controlurb, GFP_KERNEL)) {
kfree(sht->proc_name);
return 0;
}
/* In host->hostdata we store a pointer to desc */
desc->host = scsi_register (sht, sizeof (desc));
if (desc->host == NULL) {
kfree (sht->proc_name);
usb_unlink_urb(desc->controlurb);
return 0;
}
desc->host->hostdata[0] = (unsigned long) desc;
return 1;
}
static int hpusbscsi_scsi_queuecommand (Scsi_Cmnd *srb, scsi_callback callback)
{
struct hpusbscsi* hpusbscsi = (struct hpusbscsi*)(srb->device->host->hostdata[0]);
usb_complete_t usb_callback;
int res;
/* we don't answer for anything but our single device on any faked host controller */
if ( srb->device->lun || srb->device->id || srb->device->channel ) {
if (callback) {
srb->result = DID_BAD_TARGET;
callback(srb);
}
goto out;
}
/* Now we need to decide which callback to give to the urb we send the command with */
if (!srb->bufflen) {
if (srb->cmnd[0] == REQUEST_SENSE){
hpusbscsi->current_data_pipe = usb_rcvbulkpipe(hpusbscsi->dev, hpusbscsi->ep_in);
usb_callback = request_sense_callback;
} else {
usb_callback = simple_command_callback;
}
} else {
if (likely(srb->use_sg)) {
usb_callback = scatter_gather_callback;
hpusbscsi->fragment = 0;
} else {
usb_callback = simple_payload_callback;
}
/* Now we find out which direction data is to be transfered in */
hpusbscsi->current_data_pipe = DIRECTION_IS_IN(srb->cmnd[0]) ?
usb_rcvbulkpipe(hpusbscsi->dev, hpusbscsi->ep_in)
:
usb_sndbulkpipe(hpusbscsi->dev, hpusbscsi->ep_out)
;
}
TRACE_STATE;
/* We zero the sense buffer to avoid confusing user space */
memset(srb->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
hpusbscsi->state = HP_STATE_BEGINNING;
TRACE_STATE;
/* We prepare the urb for writing out the scsi command */
usb_fill_bulk_urb(
hpusbscsi->dataurb,
hpusbscsi->dev,
usb_sndbulkpipe(hpusbscsi->dev,hpusbscsi->ep_out),
srb->cmnd,
srb->cmd_len,
usb_callback,
hpusbscsi
);
hpusbscsi->scallback = callback;
hpusbscsi->srb = srb;
res = usb_submit_urb(hpusbscsi->dataurb, GFP_ATOMIC);
if (unlikely(res)) {
hpusbscsi->state = HP_STATE_FREE;
TRACE_STATE;
if (likely(callback != NULL)) {
srb->result = DID_ERROR;
callback(srb);
}
}
out:
return 0;
}
static int hpusbscsi_scsi_host_reset (Scsi_Cmnd *srb)
{
struct hpusbscsi* hpusbscsi = (struct hpusbscsi*)(srb->device->host->hostdata[0]);
printk(KERN_DEBUG"SCSI reset requested.\n");
//usb_reset_device(hpusbscsi->dev);
//printk(KERN_DEBUG"SCSI reset completed.\n");
hpusbscsi->state = HP_STATE_FREE;
return 0;
}
static int hpusbscsi_scsi_abort (Scsi_Cmnd *srb)
{
struct hpusbscsi* hpusbscsi = (struct hpusbscsi*)(srb->device->host->hostdata[0]);
printk(KERN_DEBUG"Requested is canceled.\n");
usb_unlink_urb(hpusbscsi->dataurb);
usb_unlink_urb(hpusbscsi->controlurb);
hpusbscsi->state = HP_STATE_FREE;
return SCSI_ABORT_PENDING;
}
/* usb interrupt handlers - they are all running IN INTERRUPT ! */
static void handle_usb_error (struct hpusbscsi *hpusbscsi)
{
if (likely(hpusbscsi->scallback != NULL)) {
hpusbscsi->srb->result = DID_ERROR;
hpusbscsi->scallback(hpusbscsi->srb);
}
hpusbscsi->state = HP_STATE_FREE;
}
static void control_interrupt_callback (struct urb *u, struct pt_regs *regs)
{
struct hpusbscsi * hpusbscsi = (struct hpusbscsi *)u->context;
u8 scsi_state;
DEBUG("Getting status byte %d \n",hpusbscsi->scsi_state_byte);
if(unlikely(u->status < 0)) {
if (likely(hpusbscsi->state != HP_STATE_FREE))
handle_usb_error(hpusbscsi);
return;
}
scsi_state = hpusbscsi->scsi_state_byte;
if (hpusbscsi->state != HP_STATE_ERROR) {
hpusbscsi->srb->result &= SCSI_ERR_MASK;
hpusbscsi->srb->result |= scsi_state;
}
if (scsi_state == CHECK_CONDITION << 1) {
if (hpusbscsi->state == HP_STATE_WAIT) {
issue_request_sense(hpusbscsi);
} else {
/* we request sense after an eventual data transfer */
hpusbscsi->state = HP_STATE_ERROR;
}
}
if (hpusbscsi->scallback != NULL && hpusbscsi->state == HP_STATE_WAIT && scsi_state != CHECK_CONDITION <<1 )
/* we do a callback to the scsi layer if and only if all data has been transfered */
hpusbscsi->scallback(hpusbscsi->srb);
TRACE_STATE;
switch (hpusbscsi->state) {
case HP_STATE_WAIT:
hpusbscsi->state = HP_STATE_FREE;
TRACE_STATE;
break;
case HP_STATE_WORKING:
case HP_STATE_BEGINNING:
hpusbscsi->state = HP_STATE_PREMATURE;
TRACE_STATE;
break;
case HP_STATE_ERROR:
break;
default:
printk(KERN_ERR"hpusbscsi: Unexpected status report.\n");
TRACE_STATE;
hpusbscsi->state = HP_STATE_FREE;
TRACE_STATE;
break;
}
}
static void simple_command_callback(struct urb *u, struct pt_regs *regs)
{
struct hpusbscsi * hpusbscsi = (struct hpusbscsi *)u->context;
if (unlikely(u->status<0)) {
handle_usb_error(hpusbscsi);
return;
}
TRACE_STATE;
if (hpusbscsi->state != HP_STATE_PREMATURE) {
TRACE_STATE;
hpusbscsi->state = HP_STATE_WAIT;
} else {
if (likely(hpusbscsi->scallback != NULL))
hpusbscsi->scallback(hpusbscsi->srb);
hpusbscsi->state = HP_STATE_FREE;
TRACE_STATE;
}
}
static void scatter_gather_callback(struct urb *u, struct pt_regs *regs)
{
struct hpusbscsi * hpusbscsi = (struct hpusbscsi *)u->context;
struct scatterlist *sg = hpusbscsi->srb->buffer;
usb_complete_t callback;
int res;
DEBUG("Going through scatter/gather\n");
if (unlikely(u->status < 0)) {
handle_usb_error(hpusbscsi);
return;
}
if (hpusbscsi->fragment + 1 != hpusbscsi->srb->use_sg)
callback = scatter_gather_callback;
else
callback = simple_done;
TRACE_STATE;
if (hpusbscsi->state != HP_STATE_PREMATURE)
hpusbscsi->state = HP_STATE_WORKING;
TRACE_STATE;
usb_fill_bulk_urb(
u,
hpusbscsi->dev,
hpusbscsi->current_data_pipe,
page_address(sg[hpusbscsi->fragment].page) +
sg[hpusbscsi->fragment].offset,
sg[hpusbscsi->fragment++].length,
callback,
hpusbscsi
);
res = usb_submit_urb(u, GFP_ATOMIC);
if (unlikely(res))
handle_usb_error(hpusbscsi);
TRACE_STATE;
}
static void simple_done (struct urb *u, struct pt_regs *regs)
{
struct hpusbscsi * hpusbscsi = (struct hpusbscsi *)u->context;
if (unlikely(u->status < 0)) {
handle_usb_error(hpusbscsi);
return;
}
DEBUG("Data transfer done\n");
TRACE_STATE;
if (hpusbscsi->state != HP_STATE_PREMATURE) {
if (unlikely(u->status < 0)) {
handle_usb_error(hpusbscsi);
} else {
if (hpusbscsi->state != HP_STATE_ERROR) {
hpusbscsi->state = HP_STATE_WAIT;
} else {
issue_request_sense(hpusbscsi);
}
}
} else {
if (likely(hpusbscsi->scallback != NULL))
hpusbscsi->scallback(hpusbscsi->srb);
hpusbscsi->state = HP_STATE_FREE;
}
}
static void simple_payload_callback (struct urb *u, struct pt_regs *regs)
{
struct hpusbscsi * hpusbscsi = (struct hpusbscsi *)u->context;
int res;
if (unlikely(u->status<0)) {
handle_usb_error(hpusbscsi);
return;
}
usb_fill_bulk_urb(
u,
hpusbscsi->dev,
hpusbscsi->current_data_pipe,
hpusbscsi->srb->buffer,
hpusbscsi->srb->bufflen,
simple_done,
hpusbscsi
);
res = usb_submit_urb(u, GFP_ATOMIC);
if (unlikely(res)) {
handle_usb_error(hpusbscsi);
return;
}
TRACE_STATE;
if (hpusbscsi->state != HP_STATE_PREMATURE) {
hpusbscsi->state = HP_STATE_WORKING;
TRACE_STATE;
}
}
static void request_sense_callback (struct urb *u, struct pt_regs *regs)
{
struct hpusbscsi * hpusbscsi = (struct hpusbscsi *)u->context;
if (u->status<0) {
handle_usb_error(hpusbscsi);
return;
}
usb_fill_bulk_urb(
u,
hpusbscsi->dev,
hpusbscsi->current_data_pipe,
hpusbscsi->srb->sense_buffer,
SCSI_SENSE_BUFFERSIZE,
simple_done,
hpusbscsi
);
if (0 > usb_submit_urb(u, GFP_ATOMIC)) {
handle_usb_error(hpusbscsi);
return;
}
if (hpusbscsi->state != HP_STATE_PREMATURE && hpusbscsi->state != HP_STATE_ERROR)
hpusbscsi->state = HP_STATE_WORKING;
}
static void issue_request_sense (struct hpusbscsi *hpusbscsi)
{
usb_fill_bulk_urb(
hpusbscsi->dataurb,
hpusbscsi->dev,
usb_sndbulkpipe(hpusbscsi->dev, hpusbscsi->ep_out),
&hpusbscsi->sense_command,
SENSE_COMMAND_SIZE,
request_sense_callback,
hpusbscsi
);
hpusbscsi->current_data_pipe = usb_rcvbulkpipe(hpusbscsi->dev, hpusbscsi->ep_in);
if (0 > usb_submit_urb(hpusbscsi->dataurb, GFP_ATOMIC)) {
handle_usb_error(hpusbscsi);
}
}
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