source: mainline/uspace/drv/usbhub/usbhub.c@ 92d6868

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 92d6868 was 8123695a, checked in by Matus Dekanek <smekideki@…>, 14 years ago

ohci root hub set/clear feature requests redesigned
hub: fix for non-removable devices 3.0
  • Property mode set to 100644
File size: 22.6 KB
Line 
1/*
2 * Copyright (c) 2010 Matus Dekanek
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28/** @addtogroup drvusbhub
29 * @{
30 */
31/** @file
32 * @brief usb hub main functionality
33 */
34
35#include <ddf/driver.h>
36#include <bool.h>
37#include <errno.h>
38#include <str_error.h>
39
40#include <usb_iface.h>
41#include <usb/ddfiface.h>
42#include <usb/descriptor.h>
43#include <usb/recognise.h>
44#include <usb/request.h>
45#include <usb/classes/hub.h>
46#include <stdio.h>
47
48#include "usbhub.h"
49#include "usbhub_private.h"
50#include "port_status.h"
51#include "usb/usb.h"
52#include "usb/pipes.h"
53#include "usb/classes/classes.h"
54
55
56static void usb_hub_init_add_device(usb_hub_info_t * hub, uint16_t port,
57 usb_speed_t speed);
58
59static int usb_hub_trigger_connecting_non_removable_devices(
60 usb_hub_info_t * hub, usb_hub_descriptor_t * descriptor);
61
62/**
63 * control loop running in hub`s fibril
64 *
65 * Hub`s fibril periodically asks for changes on hub and if needded calls
66 * change handling routine.
67 * @warning currently hub driver asks for changes once a second
68 * @param hub_info_param hub representation pointer
69 * @return zero
70 */
71int usb_hub_control_loop(void * hub_info_param){
72 usb_hub_info_t * hub_info = (usb_hub_info_t*)hub_info_param;
73 int errorCode = EOK;
74
75 while(errorCode == EOK){
76 async_usleep(1000 * 1000 * 10 );/// \TODO proper number once
77 errorCode = usb_hub_check_hub_changes(hub_info);
78 }
79 usb_log_error("something in ctrl loop went wrong, errno %d\n",errorCode);
80
81 return 0;
82}
83
84
85//*********************************************
86//
87// hub driver code, initialization
88//
89//*********************************************
90
91/**
92 * create usb_hub_info_t structure
93 *
94 * Does only basic copying of known information into new structure.
95 * @param usb_dev usb device structure
96 * @return basic usb_hub_info_t structure
97 */
98static usb_hub_info_t * usb_hub_info_create(usb_device_t * usb_dev) {
99 usb_hub_info_t * result = usb_new(usb_hub_info_t);
100 if(!result) return NULL;
101 result->usb_device = usb_dev;
102 result->status_change_pipe = usb_dev->pipes[0].pipe;
103 result->control_pipe = &usb_dev->ctrl_pipe;
104 result->is_default_address_used = false;
105 return result;
106}
107
108/**
109 * Load hub-specific information into hub_info structure and process if needed
110 *
111 * Particularly read port count and initialize structure holding port
112 * information. If there are non-removable devices, start initializing them.
113 * This function is hub-specific and should be run only after the hub is
114 * configured using usb_hub_set_configuration function.
115 * @param hub_info hub representation
116 * @return error code
117 */
118static int usb_hub_process_hub_specific_info(usb_hub_info_t * hub_info){
119 // get hub descriptor
120 usb_log_debug("creating serialized descriptor\n");
121 void * serialized_descriptor = malloc(USB_HUB_MAX_DESCRIPTOR_SIZE);
122 usb_hub_descriptor_t * descriptor;
123
124 /* this was one fix of some bug, should not be needed anymore
125 * these lines allow to reset hub once more, it can be used as
126 * brute-force initialization for non-removable devices
127 int opResult = usb_request_set_configuration(&result->endpoints.control, 1);
128 if(opResult!=EOK){
129 usb_log_error("could not set default configuration, errno %d",opResult);
130 return opResult;
131 }
132 */
133 size_t received_size;
134 int opResult = usb_request_get_descriptor(&hub_info->usb_device->ctrl_pipe,
135 USB_REQUEST_TYPE_CLASS, USB_REQUEST_RECIPIENT_DEVICE,
136 USB_DESCTYPE_HUB,
137 0, 0, serialized_descriptor,
138 USB_HUB_MAX_DESCRIPTOR_SIZE, &received_size);
139
140 if (opResult != EOK) {
141 usb_log_error("failed when receiving hub descriptor, badcode = %d\n",
142 opResult);
143 free(serialized_descriptor);
144 return opResult;
145 }
146 usb_log_debug2("deserializing descriptor\n");
147 descriptor = usb_deserialize_hub_desriptor(serialized_descriptor);
148 if(descriptor==NULL){
149 usb_log_warning("could not deserialize descriptor \n");
150 return opResult;
151 }
152 usb_log_debug("setting port count to %d\n",descriptor->ports_count);
153 hub_info->port_count = descriptor->ports_count;
154 hub_info->attached_devs = (usb_hc_attached_device_t*)
155 malloc((hub_info->port_count+1) * sizeof(usb_hc_attached_device_t));
156 int i;
157 for(i=0;i<hub_info->port_count+1;++i){
158 hub_info->attached_devs[i].handle=0;
159 hub_info->attached_devs[i].address=0;
160 }
161 //handle non-removable devices
162 usb_hub_trigger_connecting_non_removable_devices(hub_info, descriptor);
163 usb_log_debug2("freeing data\n");
164 free(serialized_descriptor);
165 free(descriptor->devices_removable);
166 free(descriptor);
167 return EOK;
168}
169/**
170 * Set configuration of hub
171 *
172 * Check whether there is at least one configuration and sets the first one.
173 * This function should be run prior to running any hub-specific action.
174 * @param hub_info hub representation
175 * @return error code
176 */
177static int usb_hub_set_configuration(usb_hub_info_t * hub_info){
178 //device descriptor
179 usb_standard_device_descriptor_t *std_descriptor
180 = &hub_info->usb_device->descriptors.device;
181 usb_log_debug("hub has %d configurations\n",
182 std_descriptor->configuration_count);
183 if(std_descriptor->configuration_count<1){
184 usb_log_error("there are no configurations available\n");
185 return EINVAL;
186 }
187
188 usb_standard_configuration_descriptor_t *config_descriptor
189 = (usb_standard_configuration_descriptor_t *)
190 hub_info->usb_device->descriptors.configuration;
191
192 /* Set configuration. */
193 int opResult = usb_request_set_configuration(
194 &hub_info->usb_device->ctrl_pipe,
195 config_descriptor->configuration_number);
196
197 if (opResult != EOK) {
198 usb_log_error("Failed to set hub configuration: %s.\n",
199 str_error(opResult));
200 return opResult;
201 }
202 usb_log_debug("\tused configuration %d\n",
203 config_descriptor->configuration_number);
204
205 return EOK;
206}
207
208/**
209 * Initialize hub device driver fibril
210 *
211 * Creates hub representation and fibril that periodically checks hub`s status.
212 * Hub representation is passed to the fibril.
213 * @param usb_dev generic usb device information
214 * @return error code
215 */
216int usb_hub_add_device(usb_device_t * usb_dev){
217 if(!usb_dev) return EINVAL;
218 usb_hub_info_t * hub_info = usb_hub_info_create(usb_dev);
219 //create hc connection
220 usb_log_debug("Initializing USB wire abstraction.\n");
221 int opResult = usb_hc_connection_initialize_from_device(
222 &hub_info->connection,
223 hub_info->usb_device->ddf_dev);
224 if(opResult != EOK){
225 usb_log_error("could not initialize connection to device, errno %d\n",
226 opResult);
227 free(hub_info);
228 return opResult;
229 }
230
231 usb_pipe_start_session(hub_info->control_pipe);
232 //set hub configuration
233 opResult = usb_hub_set_configuration(hub_info);
234 if(opResult!=EOK){
235 usb_log_error("could not set hub configuration, errno %d\n",opResult);
236 free(hub_info);
237 return opResult;
238 }
239 //get port count and create attached_devs
240 opResult = usb_hub_process_hub_specific_info(hub_info);
241 if(opResult!=EOK){
242 usb_log_error("could not set hub configuration, errno %d\n",opResult);
243 free(hub_info);
244 return opResult;
245 }
246 usb_pipe_end_session(hub_info->control_pipe);
247
248
249 /// \TODO what is this?
250 usb_log_debug("Creating `hub' function.\n");
251 ddf_fun_t *hub_fun = ddf_fun_create(hub_info->usb_device->ddf_dev,
252 fun_exposed, "hub");
253 assert(hub_fun != NULL);
254 hub_fun->ops = NULL;
255
256 int rc = ddf_fun_bind(hub_fun);
257 assert(rc == EOK);
258 rc = ddf_fun_add_to_class(hub_fun, "hub");
259 assert(rc == EOK);
260
261 //create fibril for the hub control loop
262 fid_t fid = fibril_create(usb_hub_control_loop, hub_info);
263 if (fid == 0) {
264 usb_log_error("failed to start monitoring fibril for new hub.\n");
265 return ENOMEM;
266 }
267 fibril_add_ready(fid);
268 usb_log_debug("Hub fibril created.\n");
269
270 usb_log_info("Controlling hub `%s' (%d ports).\n",
271 hub_info->usb_device->ddf_dev->name, hub_info->port_count);
272 return EOK;
273}
274
275
276//*********************************************
277//
278// hub driver code, main loop and port handling
279//
280//*********************************************
281
282/**
283 * triggers actions to connect non0removable devices
284 *
285 * This will trigger operations leading to activated non-removable device.
286 * Control pipe of the hub must be open fo communication.
287 * @param hub hub representation
288 * @param descriptor usb hub descriptor
289 * @return error code
290 */
291static int usb_hub_trigger_connecting_non_removable_devices(usb_hub_info_t * hub,
292 usb_hub_descriptor_t * descriptor)
293{
294 usb_log_info("attaching non-removable devices(if any)\n");
295 usb_device_request_setup_packet_t request;
296 int opResult;
297 size_t rcvd_size;
298 usb_port_status_t status;
299 uint8_t * non_removable_dev_bitmap = descriptor->devices_removable;
300 int port;
301 for(port=1;port<=descriptor->ports_count;++port){
302 bool is_non_removable =
303 ((non_removable_dev_bitmap[port/8]) >> (port%8)) %2;
304 if(is_non_removable){
305 usb_log_debug("non-removable device on port %d\n",port);
306 usb_hub_set_port_status_request(&request, port);
307 opResult = usb_pipe_control_read(
308 hub->control_pipe,
309 &request, sizeof(usb_device_request_setup_packet_t),
310 &status, 4, &rcvd_size
311 );
312 if (opResult != EOK) {
313 usb_log_error("could not get port status of port %d errno:%d\n",
314 port, opResult);
315 return opResult;
316 }
317 //set the status change bit, so it will be noticed in driver loop
318 if(usb_port_dev_connected(&status)){
319 usb_hub_set_disable_port_feature_request(&request, port,
320 USB_HUB_FEATURE_PORT_CONNECTION);
321 opResult = usb_pipe_control_read(
322 hub->control_pipe,
323 &request, sizeof(usb_device_request_setup_packet_t),
324 &status, 4, &rcvd_size
325 );
326 if (opResult != EOK) {
327 usb_log_warning(
328 "could not clear port connection on port %d errno:%d\n",
329 port, opResult);
330 }
331 usb_log_debug("cleared port connection\n");
332 usb_hub_set_enable_port_feature_request(&request, port,
333 USB_HUB_FEATURE_PORT_ENABLE);
334 opResult = usb_pipe_control_read(
335 hub->control_pipe,
336 &request, sizeof(usb_device_request_setup_packet_t),
337 &status, 4, &rcvd_size
338 );
339 if (opResult != EOK) {
340 usb_log_warning(
341 "could not set port enabled on port %d errno:%d\n",
342 port, opResult);
343 }
344 usb_log_debug("port set to enabled - should lead to connection change\n");
345 }
346 }
347 }
348 /// \TODO this is just a debug code
349 for(port=1;port<=descriptor->ports_count;++port){
350 bool is_non_removable =
351 ((non_removable_dev_bitmap[port/8]) >> (port%8)) %2;
352 if(is_non_removable){
353 usb_log_debug("port %d is non-removable\n",port);
354 usb_port_status_t status;
355 size_t rcvd_size;
356 usb_device_request_setup_packet_t request;
357 //int opResult;
358 usb_hub_set_port_status_request(&request, port);
359 //endpoint 0
360 opResult = usb_pipe_control_read(
361 hub->control_pipe,
362 &request, sizeof(usb_device_request_setup_packet_t),
363 &status, 4, &rcvd_size
364 );
365 if (opResult != EOK) {
366 usb_log_error("could not get port status %d\n",opResult);
367 }
368 if (rcvd_size != sizeof (usb_port_status_t)) {
369 usb_log_error("received status has incorrect size\n");
370 }
371 //something connected/disconnected
372 if (usb_port_connect_change(&status)) {
373 usb_log_debug("some connection changed\n");
374 }
375 usb_log_debug("status: %s\n",usb_debug_str_buffer(
376 (uint8_t *)&status,4,4));
377 }
378 }
379 return EOK;
380}
381
382
383/**
384 * release default address used by given hub
385 *
386 * Also unsets hub->is_default_address_used. Convenience wrapper function.
387 * @note hub->connection MUST be open for communication
388 * @param hub hub representation
389 * @return error code
390 */
391static int usb_hub_release_default_address(usb_hub_info_t * hub){
392 int opResult = usb_hc_release_default_address(&hub->connection);
393 if(opResult!=EOK){
394 usb_log_error("could not release default address, errno %d\n",opResult);
395 return opResult;
396 }
397 hub->is_default_address_used = false;
398 return EOK;
399}
400
401/**
402 * Reset the port with new device and reserve the default address.
403 * @param hub hub representation
404 * @param port port number, starting from 1
405 * @param speed transfer speed of attached device, one of low, full or high
406 */
407static void usb_hub_init_add_device(usb_hub_info_t * hub, uint16_t port,
408 usb_speed_t speed) {
409 //if this hub already uses default address, it cannot request it once more
410 if(hub->is_default_address_used) return;
411 usb_log_debug("some connection changed\n");
412 assert(hub->control_pipe->hc_phone);
413 int opResult = usb_hub_clear_port_feature(hub->control_pipe,
414 port, USB_HUB_FEATURE_C_PORT_CONNECTION);
415 if(opResult != EOK){
416 usb_log_warning("could not clear port-change-connection flag\n");
417 }
418 usb_device_request_setup_packet_t request;
419
420 //get default address
421 opResult = usb_hc_reserve_default_address(&hub->connection, speed);
422
423 if (opResult != EOK) {
424 usb_log_warning("cannot assign default address, it is probably used %d\n",
425 opResult);
426 return;
427 }
428 hub->is_default_address_used = true;
429 //reset port
430 usb_hub_set_reset_port_request(&request, port);
431 opResult = usb_pipe_control_write(
432 hub->control_pipe,
433 &request,sizeof(usb_device_request_setup_packet_t),
434 NULL, 0
435 );
436 if (opResult != EOK) {
437 usb_log_error("something went wrong when reseting a port %d\n",opResult);
438 usb_hub_release_default_address(hub);
439 }
440 return;
441}
442
443/**
444 * Finalize adding new device after port reset
445 *
446 * Set device`s address and start it`s driver.
447 * @param hub hub representation
448 * @param port port number, starting from 1
449 * @param speed transfer speed of attached device, one of low, full or high
450 */
451static void usb_hub_finalize_add_device( usb_hub_info_t * hub,
452 uint16_t port, usb_speed_t speed) {
453
454 int opResult;
455 usb_log_debug("finalizing add device\n");
456 opResult = usb_hub_clear_port_feature(hub->control_pipe,
457 port, USB_HUB_FEATURE_C_PORT_RESET);
458
459 if (opResult != EOK) {
460 usb_log_error("failed to clear port reset feature\n");
461 usb_hub_release_default_address(hub);
462 return;
463 }
464 //create connection to device
465 usb_pipe_t new_device_pipe;
466 usb_device_connection_t new_device_connection;
467 usb_device_connection_initialize_on_default_address(
468 &new_device_connection,
469 &hub->connection
470 );
471 usb_pipe_initialize_default_control(
472 &new_device_pipe,
473 &new_device_connection);
474 usb_pipe_probe_default_control(&new_device_pipe);
475
476 /* Request address from host controller. */
477 usb_address_t new_device_address = usb_hc_request_address(
478 &hub->connection,
479 speed
480 );
481 if (new_device_address < 0) {
482 usb_log_error("failed to get free USB address\n");
483 opResult = new_device_address;
484 usb_hub_release_default_address(hub);
485 return;
486 }
487 usb_log_debug("setting new address %d\n",new_device_address);
488 //opResult = usb_drv_req_set_address(hc, USB_ADDRESS_DEFAULT,
489 // new_device_address);
490 usb_pipe_start_session(&new_device_pipe);
491 opResult = usb_request_set_address(&new_device_pipe,new_device_address);
492 usb_pipe_end_session(&new_device_pipe);
493 if (opResult != EOK) {
494 usb_log_error("could not set address for new device %d\n",opResult);
495 usb_hub_release_default_address(hub);
496 return;
497 }
498
499 //opResult = usb_hub_release_default_address(hc);
500 opResult = usb_hub_release_default_address(hub);
501 if(opResult!=EOK){
502 return;
503 }
504
505 devman_handle_t child_handle;
506 //??
507 opResult = usb_device_register_child_in_devman(new_device_address,
508 hub->connection.hc_handle, hub->usb_device->ddf_dev, &child_handle,
509 NULL, NULL, NULL);
510
511 if (opResult != EOK) {
512 usb_log_error("could not start driver for new device %d\n",opResult);
513 return;
514 }
515 hub->attached_devs[port].handle = child_handle;
516 hub->attached_devs[port].address = new_device_address;
517
518 //opResult = usb_drv_bind_address(hc, new_device_address, child_handle);
519 opResult = usb_hc_register_device(
520 &hub->connection,
521 &hub->attached_devs[port]);
522 if (opResult != EOK) {
523 usb_log_error("could not assign address of device in hcd %d\n",opResult);
524 return;
525 }
526 usb_log_info("Detected new device on `%s' (port %d), " \
527 "address %d (handle %llu).\n",
528 hub->usb_device->ddf_dev->name, (int) port,
529 new_device_address, child_handle);
530}
531
532/**
533 * routine called when a device on port has been removed
534 *
535 * If the device on port had default address, it releases default address.
536 * Otherwise does not do anything, because DDF does not allow to remove device
537 * from it`s device tree.
538 * @param hub hub representation
539 * @param port port number, starting from 1
540 */
541static void usb_hub_removed_device(
542 usb_hub_info_t * hub,uint16_t port) {
543
544 int opResult = usb_hub_clear_port_feature(hub->control_pipe,
545 port, USB_HUB_FEATURE_C_PORT_CONNECTION);
546 if(opResult != EOK){
547 usb_log_warning("could not clear port-change-connection flag\n");
548 }
549 /** \TODO remove device from device manager - not yet implemented in
550 * devide manager
551 */
552
553 //close address
554 if(hub->attached_devs[port].address!=0){
555 /*uncomment this code to use it when DDF allows device removal
556 opResult = usb_hc_unregister_device(
557 &hub->connection, hub->attached_devs[port].address);
558 if(opResult != EOK) {
559 dprintf(USB_LOG_LEVEL_WARNING, "could not release address of " \
560 "removed device: %d", opResult);
561 }
562 hub->attached_devs[port].address = 0;
563 hub->attached_devs[port].handle = 0;
564 */
565 }else{
566 usb_log_warning("this is strange, disconnected device had no address\n");
567 //device was disconnected before it`s port was reset - return default address
568 usb_hub_release_default_address(hub);
569 }
570}
571
572
573/**
574 * Process over current condition on port.
575 *
576 * Turn off the power on the port.
577 *
578 * @param hub hub representation
579 * @param port port number, starting from 1
580 */
581static void usb_hub_over_current( usb_hub_info_t * hub,
582 uint16_t port){
583 int opResult;
584 opResult = usb_hub_clear_port_feature(hub->control_pipe,
585 port, USB_HUB_FEATURE_PORT_POWER);
586 if(opResult!=EOK){
587 usb_log_error("cannot power off port %d; %d\n",
588 port, opResult);
589 }
590}
591
592/**
593 * Process interrupts on given hub port
594 *
595 * Accepts connection, over current and port reset change.
596 * @param hub hub representation
597 * @param port port number, starting from 1
598 */
599static void usb_hub_process_interrupt(usb_hub_info_t * hub,
600 uint16_t port) {
601 usb_log_debug("interrupt at port %d\n", port);
602 //determine type of change
603 usb_pipe_t *pipe = hub->control_pipe;
604
605 int opResult;
606
607 usb_port_status_t status;
608 size_t rcvd_size;
609 usb_device_request_setup_packet_t request;
610 //int opResult;
611 usb_hub_set_port_status_request(&request, port);
612 //endpoint 0
613
614 opResult = usb_pipe_control_read(
615 pipe,
616 &request, sizeof(usb_device_request_setup_packet_t),
617 &status, 4, &rcvd_size
618 );
619 if (opResult != EOK) {
620 usb_log_error("could not get port status\n");
621 return;
622 }
623 if (rcvd_size != sizeof (usb_port_status_t)) {
624 usb_log_error("received status has incorrect size\n");
625 return;
626 }
627 //something connected/disconnected
628 if (usb_port_connect_change(&status)) {
629 usb_log_debug("connection change on port\n");
630 if (usb_port_dev_connected(&status)) {
631 usb_log_debug("some connection changed\n");
632 usb_hub_init_add_device(hub, port, usb_port_speed(&status));
633 } else {
634 usb_hub_removed_device(hub, port);
635 }
636 }
637 //over current
638 if (usb_port_overcurrent_change(&status)) {
639 //check if it was not auto-resolved
640 usb_log_debug("overcurrent change on port\n");
641 if(usb_port_over_current(&status)){
642 usb_hub_over_current(hub,port);
643 }else{
644 usb_log_debug("over current condition was auto-resolved on port %d\n",
645 port);
646 }
647 }
648 //port reset
649 if (usb_port_reset_completed(&status)) {
650 usb_log_debug("port reset complete\n");
651 if (usb_port_enabled(&status)) {
652 usb_hub_finalize_add_device(hub, port, usb_port_speed(&status));
653 } else {
654 usb_log_warning("port reset, but port still not enabled\n");
655 }
656 }
657 usb_log_debug("status %x\n ",status);
658
659 usb_port_set_connect_change(&status, false);
660 usb_port_set_reset(&status, false);
661 usb_port_set_reset_completed(&status, false);
662 usb_port_set_dev_connected(&status, false);
663 if (status>>16) {
664 usb_log_info("there was some unsupported change on port %d: %X\n",
665 port,status);
666
667 }
668}
669
670/**
671 * check changes on hub
672 *
673 * Handles changes on each port with a status change.
674 * @param hub_info hub representation
675 * @return error code
676 */
677int usb_hub_check_hub_changes(usb_hub_info_t * hub_info){
678 int opResult;
679 opResult = usb_pipe_start_session(
680 hub_info->status_change_pipe);
681 if(opResult != EOK){
682 usb_log_error("could not initialize communication for hub; %d\n",
683 opResult);
684 return opResult;
685 }
686
687 size_t port_count = hub_info->port_count;
688
689 /// FIXME: count properly
690 size_t byte_length = ((port_count+1) / 8) + 1;
691 void *change_bitmap = malloc(byte_length);
692 size_t actual_size;
693
694 /*
695 * Send the request.
696 */
697 opResult = usb_pipe_read(
698 hub_info->status_change_pipe,
699 change_bitmap, byte_length, &actual_size
700 );
701
702 if (opResult != EOK) {
703 free(change_bitmap);
704 usb_log_warning("something went wrong while getting status of hub\n");
705 usb_pipe_end_session(hub_info->status_change_pipe);
706 return opResult;
707 }
708 unsigned int port;
709 opResult = usb_pipe_start_session(hub_info->control_pipe);
710 if(opResult!=EOK){
711 usb_log_error("could not start control pipe session %d\n", opResult);
712 usb_pipe_end_session(hub_info->status_change_pipe);
713 return opResult;
714 }
715 opResult = usb_hc_connection_open(&hub_info->connection);
716 if(opResult!=EOK){
717 usb_log_error("could not start host controller session %d\n",
718 opResult);
719 usb_pipe_end_session(hub_info->control_pipe);
720 usb_pipe_end_session(hub_info->status_change_pipe);
721 return opResult;
722 }
723
724 ///todo, opresult check, pre obe konekce
725 for (port = 1; port < port_count+1; ++port) {
726 bool interrupt =
727 (((uint8_t*) change_bitmap)[port / 8] >> (port % 8)) % 2;
728 if (interrupt) {
729 usb_hub_process_interrupt(
730 hub_info, port);
731 }
732 }
733 usb_hc_connection_close(&hub_info->connection);
734 usb_pipe_end_session(hub_info->control_pipe);
735 usb_pipe_end_session(hub_info->status_change_pipe);
736 free(change_bitmap);
737 return EOK;
738}
739
740
741
742/**
743 * @}
744 */
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