source: mainline/uspace/drv/bus/usb/ehci/ehci_rh.c@ 5f5321ee

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 5f5321ee was 07b8877, checked in by Jan Vesely <jano.vesely@…>, 12 years ago

ehci,rh: Consider software flags for port changes
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File size: 17.4 KB
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1/*
2 * Copyright (c) 2013 Jan Vesely
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 drvusbehci
29 * @{
30 */
31/** @file
32 * @brief EHCI driver
33 */
34
35#include <assert.h>
36#include <errno.h>
37#include <mem.h>
38#include <sys/types.h>
39
40#include <usb/classes/hub.h>
41#include <usb/debug.h>
42#include <usb/descriptor.h>
43#include <usb/request.h>
44#include <usb/usb.h>
45
46#include <usb/host/endpoint.h>
47#include <usbvirt/device.h>
48
49#include "ehci_rh.h"
50
51enum {
52 HUB_STATUS_CHANGE_PIPE = 1,
53};
54
55static usbvirt_device_ops_t ops;
56
57/** Initialize internal USB HUB class descriptor.
58 * @param instance EHCI root hub.
59 * Use register based info to create accurate descriptor.
60 */
61static void ehci_rh_hub_desc_init(ehci_rh_t *instance, unsigned hcs)
62{
63 assert(instance);
64 const unsigned dsize = sizeof(usb_hub_descriptor_header_t) +
65 STATUS_BYTES(instance->port_count) * 2;
66 assert(dsize <= sizeof(instance->hub_descriptor));
67
68 instance->hub_descriptor.header.length = dsize;
69 instance->hub_descriptor.header.descriptor_type = USB_DESCTYPE_HUB;
70 instance->hub_descriptor.header.port_count = instance->port_count;
71 /* Bits 0,1 indicate power switching mode
72 * Bit 2 indicates device type (compound device)
73 * Bits 3,4 indicate over-current protection mode */
74 instance->hub_descriptor.header.characteristics = 0 |
75 ((hcs & EHCI_CAPS_HCS_PPC_FLAG) ? 0x09 : 0x12) |
76 ((hcs & EHCI_CAPS_HCS_INDICATORS_FLAG) ? 0x80 : 0) |
77 (0x3 << 5); /* Need 32 FS bit times */ // TODO Implement
78 instance->hub_descriptor.header.characteristics_reserved = 0;
79 instance->hub_descriptor.header.power_good_time = 50;
80 /* bHubContrCurrent, root hubs don't need no power. */
81 instance->hub_descriptor.header.max_current = 0;
82
83 /* Device removable and some legacy 1.0 stuff*/
84 instance->hub_descriptor.rempow[0] = 0xff;
85 instance->hub_descriptor.rempow[1] = 0xff;
86 instance->hub_descriptor.rempow[2] = 0xff;
87 instance->hub_descriptor.rempow[3] = 0xff;
88
89}
90/** Initialize EHCI root hub.
91 * @param instance Place to initialize.
92 * @param regs EHCI device registers.
93 * @param name Device name.
94 * return Error code, EOK on success.
95 *
96 * Selects preconfigured port powering mode, sets up descriptor, and
97 * initializes internal virtual hub.
98 */
99int ehci_rh_init(ehci_rh_t *instance, ehci_caps_regs_t *caps, ehci_regs_t *regs,
100const char *name)
101{
102 assert(instance);
103 instance->registers = regs;
104 instance->port_count =
105 (EHCI_RD(caps->hcsparams) >> EHCI_CAPS_HCS_N_PORTS_SHIFT) &
106 EHCI_CAPS_HCS_N_PORTS_MASK;
107 usb_log_debug2("hcsparams: %x.\n", EHCI_RD(caps->hcsparams));
108 usb_log_info("%s: Found %u ports.\n", name, instance->port_count);
109
110 if (EHCI_RD(caps->hcsparams) & EHCI_CAPS_HCS_PPC_FLAG) {
111 usb_log_info("%s: Per-port power switching.\n", name);
112 } else {
113 usb_log_info("%s: No power switching.\n", name);
114 }
115
116 for (unsigned i = 0; i < EHCI_MAX_PORTS; ++i) {
117 instance->reset_flag[i] = false;
118 instance->resume_flag[i] = false;
119 }
120
121 ehci_rh_hub_desc_init(instance, EHCI_RD(caps->hcsparams));
122 instance->unfinished_interrupt_transfer = NULL;
123
124 return virthub_base_init(&instance->base, name, &ops, instance,
125 NULL, &instance->hub_descriptor.header, HUB_STATUS_CHANGE_PIPE);
126}
127
128/** Schedule USB request.
129 * @param instance OCHI root hub instance.
130 * @param batch USB requst batch to schedule.
131 * @return Always EOK.
132 * Most requests complete even before this function returns,
133 * status change requests might be postponed until there is something to report.
134 */
135int ehci_rh_schedule(ehci_rh_t *instance, usb_transfer_batch_t *batch)
136{
137 assert(instance);
138 assert(batch);
139 const usb_target_t target = {{
140 .address = batch->ep->address,
141 .endpoint = batch->ep->endpoint,
142 }};
143 batch->error = virthub_base_request(&instance->base, target,
144 usb_transfer_batch_direction(batch), (void*)batch->setup_buffer,
145 batch->buffer, batch->buffer_size, &batch->transfered_size);
146 if (batch->error == ENAK) {
147 /* This is safe because only status change interrupt transfers
148 * return NAK. The assertion holds true because the batch
149 * existence prevents communication with that ep */
150 assert(instance->unfinished_interrupt_transfer == NULL);
151 instance->unfinished_interrupt_transfer = batch;
152 } else {
153 usb_transfer_batch_finish(batch, NULL);
154 usb_transfer_batch_destroy(batch);
155 }
156 return EOK;
157}
158
159/** Handle EHCI RHSC interrupt.
160 * @param instance EHCI root hub isntance.
161 * @return Always EOK.
162 *
163 * Interrupt means there is a change of status to report. It may trigger
164 * processing of a postponed request.
165 */
166int ehci_rh_interrupt(ehci_rh_t *instance)
167{
168 //TODO atomic swap needed
169 usb_transfer_batch_t *batch = instance->unfinished_interrupt_transfer;
170 instance->unfinished_interrupt_transfer = NULL;
171 if (batch) {
172 const usb_target_t target = {{
173 .address = batch->ep->address,
174 .endpoint = batch->ep->endpoint,
175 }};
176 batch->error = virthub_base_request(&instance->base, target,
177 usb_transfer_batch_direction(batch),
178 (void*)batch->setup_buffer,
179 batch->buffer, batch->buffer_size, &batch->transfered_size);
180 usb_transfer_batch_finish(batch, NULL);
181 usb_transfer_batch_destroy(batch);
182 }
183 return EOK;
184}
185
186/* HUB ROUTINES IMPLEMENTATION */
187#define TEST_SIZE_INIT(size, port, hub) \
188do { \
189 hub = virthub_get_data(device); \
190 assert(hub);\
191 if (uint16_usb2host(setup_packet->length) != size) \
192 return ESTALL; \
193 port = uint16_usb2host(setup_packet->index) - 1; \
194 if (port > hub->port_count) \
195 return EINVAL; \
196} while (0)
197
198/** Hub status request handler.
199 * @param device Virtual hub device
200 * @param setup_packet USB setup stage data.
201 * @param[out] data destination data buffer, size must be at least
202 * setup_packet->length bytes
203 * @param[out] act_size Sized of the valid response part of the buffer.
204 * @return Error code.
205 */
206static int req_get_status(usbvirt_device_t *device,
207 const usb_device_request_setup_packet_t *setup_packet,
208 uint8_t *data, size_t *act_size)
209{
210 ehci_rh_t *hub = virthub_get_data(device);
211 assert(hub);
212 if (uint16_usb2host(setup_packet->length) != 4)
213 return ESTALL;
214 /* ECHI RH does not report global OC, and local power is always good */
215 const uint32_t val = 0;
216 memcpy(data, &val, sizeof(val));
217 *act_size = sizeof(val);
218 return EOK;
219}
220
221/** Hub set feature request handler.
222 * @param device Virtual hub device
223 * @param setup_packet USB setup stage data.
224 * @param[out] data destination data buffer, size must be at least
225 * setup_packet->length bytes
226 * @param[out] act_size Sized of the valid response part of the buffer.
227 * @return Error code.
228 */
229static int req_clear_hub_feature(usbvirt_device_t *device,
230 const usb_device_request_setup_packet_t *setup_packet,
231 uint8_t *data, size_t *act_size)
232{
233 ehci_rh_t *hub = virthub_get_data(device);
234 assert(hub);
235
236 /*
237 * Chapter 11.16.2 specifies that only C_HUB_LOCAL_POWER and
238 * C_HUB_OVER_CURRENT are supported.
239 * C_HUB_LOCAL_POWER is not supported because root hubs do not support
240 * local power status feature.
241 * EHCI RH does not report global OC condition either
242 */
243 return ESTALL;
244}
245
246#define BIT_VAL(val, bit) ((val & bit) ? 1 : 0)
247#define EHCI2USB(val, bit, feat) (BIT_VAL(val, bit) << feat)
248
249/** Port status request handler.
250 * @param device Virtual hub device
251 * @param setup_packet USB setup stage data.
252 * @param[out] data destination data buffer, size must be at least
253 * setup_packet->length bytes
254 * @param[out] act_size Sized of the valid response part of the buffer.
255 * @return Error code.
256 */
257static int req_get_port_status(usbvirt_device_t *device,
258 const usb_device_request_setup_packet_t *setup_packet,
259 uint8_t *data, size_t *act_size)
260{
261 ehci_rh_t *hub;
262 unsigned port;
263 TEST_SIZE_INIT(4, port, hub);
264 if (setup_packet->value != 0)
265 return EINVAL;
266
267 const uint32_t reg = EHCI_RD(hub->registers->portsc[port]);
268 const uint32_t status = uint32_host2usb(
269 EHCI2USB(reg, USB_PORTSC_CONNECT_FLAG, USB_HUB_FEATURE_PORT_CONNECTION) |
270 EHCI2USB(reg, USB_PORTSC_ENABLED_FLAG, USB_HUB_FEATURE_PORT_ENABLE) |
271 EHCI2USB(reg, USB_PORTSC_SUSPEND_FLAG, USB_HUB_FEATURE_PORT_SUSPEND) |
272 EHCI2USB(reg, USB_PORTSC_OC_ACTIVE_FLAG, USB_HUB_FEATURE_PORT_OVER_CURRENT) |
273 EHCI2USB(reg, USB_PORTSC_PORT_RESET_FLAG, USB_HUB_FEATURE_PORT_RESET) |
274 EHCI2USB(reg, USB_PORTSC_PORT_POWER_FLAG, USB_HUB_FEATURE_PORT_POWER) |
275 (((reg & USB_PORTSC_LINE_STATUS_MASK) == USB_PORTSC_LINE_STATUS_K) ?
276 (1 << USB_HUB_FEATURE_PORT_LOW_SPEED) : 0) |
277 ((reg & USB_PORTSC_PORT_OWNER_FLAG) ? 0 : (1 << USB_HUB_FEATURE_PORT_HIGH_SPEED)) |
278 EHCI2USB(reg, USB_PORTSC_PORT_TEST_MASK, 11) |
279 EHCI2USB(reg, USB_PORTSC_INDICATOR_MASK, 12) |
280 EHCI2USB(reg, USB_PORTSC_CONNECT_CH_FLAG, USB_HUB_FEATURE_C_PORT_CONNECTION) |
281 EHCI2USB(reg, USB_PORTSC_EN_CHANGE_FLAG, USB_HUB_FEATURE_C_PORT_ENABLE) |
282 (hub->resume_flag[port] ? (1 << USB_HUB_FEATURE_C_PORT_SUSPEND) : 0) |
283 EHCI2USB(reg, USB_PORTSC_OC_CHANGE_FLAG, USB_HUB_FEATURE_C_PORT_OVER_CURRENT) |
284 (hub->reset_flag[port] ? (1 << USB_HUB_FEATURE_C_PORT_RESET): 0)
285 );
286 /* Note feature numbers for test and indicator feature do not
287 * corespond to the port status bit locations */
288 memcpy(data, &status, sizeof(status));
289 *act_size = sizeof(status);
290 return EOK;
291}
292
293/** Port clear feature request handler.
294 * @param device Virtual hub device
295 * @param setup_packet USB setup stage data.
296 * @param[out] data destination data buffer, size must be at least
297 * setup_packet->length bytes
298 * @param[out] act_size Sized of the valid response part of the buffer.
299 * @return Error code.
300 */
301static int req_clear_port_feature(usbvirt_device_t *device,
302 const usb_device_request_setup_packet_t *setup_packet,
303 uint8_t *data, size_t *act_size)
304{
305 ehci_rh_t *hub;
306 unsigned port;
307 TEST_SIZE_INIT(0, port, hub);
308 const unsigned feature = uint16_usb2host(setup_packet->value);
309 /* Enabled features to clear: see page 269 of USB specs */
310 switch (feature)
311 {
312 case USB_HUB_FEATURE_PORT_POWER: /*8*/
313 EHCI_CLR(hub->registers->portsc[port],
314 USB_PORTSC_PORT_POWER_FLAG);
315 return EOK;
316
317 case USB_HUB_FEATURE_PORT_ENABLE: /*1*/
318 EHCI_CLR(hub->registers->portsc[port],
319 USB_PORTSC_ENABLED_FLAG);
320 return EOK;
321
322 case USB_HUB_FEATURE_PORT_SUSPEND: /*2*/
323 /* If not in suspend it's noop */
324 if ((EHCI_RD(hub->registers->portsc[port]) &
325 USB_PORTSC_SUSPEND_FLAG) == 0)
326 return EOK;
327 /* Host driven resume */
328 EHCI_SET(hub->registers->portsc[port],
329 USB_PORTSC_RESUME_FLAG);
330 async_usleep(20000);
331 EHCI_CLR(hub->registers->portsc[port],
332 USB_PORTSC_RESUME_FLAG);
333 hub->resume_flag[port] = true;
334 return EOK;
335
336 case USB_HUB_FEATURE_C_PORT_CONNECTION: /*16*/
337 EHCI_SET(hub->registers->portsc[port],
338 USB_PORTSC_CONNECT_CH_FLAG);
339 return EOK;
340 case USB_HUB_FEATURE_C_PORT_ENABLE: /*17*/
341 EHCI_SET(hub->registers->portsc[port],
342 USB_PORTSC_CONNECT_CH_FLAG);
343 return EOK;
344 case USB_HUB_FEATURE_C_PORT_OVER_CURRENT: /*19*/
345 EHCI_SET(hub->registers->portsc[port],
346 USB_PORTSC_OC_CHANGE_FLAG);
347 return EOK;
348 case USB_HUB_FEATURE_C_PORT_SUSPEND: /*18*/
349 hub->resume_flag[port] = false;
350 return EOK;
351 case USB_HUB_FEATURE_C_PORT_RESET: /*20*/
352 hub->reset_flag[port] = false;
353 return EOK;
354
355 default:
356 return ENOTSUP;
357 }
358}
359
360/** Port set feature request handler.
361 * @param device Virtual hub device
362 * @param setup_packet USB setup stage data.
363 * @param[out] data destination data buffer, size must be at least
364 * setup_packet->length bytes
365 * @param[out] act_size Sized of the valid response part of the buffer.
366 * @return Error code.
367 */
368static int req_set_port_feature(usbvirt_device_t *device,
369 const usb_device_request_setup_packet_t *setup_packet,
370 uint8_t *data, size_t *act_size)
371{
372 ehci_rh_t *hub;
373 unsigned port;
374 TEST_SIZE_INIT(0, port, hub);
375 const unsigned feature = uint16_usb2host(setup_packet->value);
376 switch (feature) {
377 case USB_HUB_FEATURE_PORT_ENABLE: /*1*/
378 EHCI_SET(hub->registers->portsc[port],
379 USB_PORTSC_ENABLED_FLAG);
380 return EOK;
381 case USB_HUB_FEATURE_PORT_SUSPEND: /*2*/
382 EHCI_SET(hub->registers->portsc[port],
383 USB_PORTSC_SUSPEND_FLAG);
384 return EOK;
385 case USB_HUB_FEATURE_PORT_RESET: /*4*/
386 EHCI_SET(hub->registers->portsc[port],
387 USB_PORTSC_PORT_RESET_FLAG);
388 async_usleep(50000);
389 EHCI_CLR(hub->registers->portsc[port],
390 USB_PORTSC_PORT_RESET_FLAG);
391 /* wait for reset to complete */
392 while (EHCI_RD(hub->registers->portsc[port]) &
393 USB_PORTSC_PORT_RESET_FLAG);
394 /* Handle port ownership, if the port is not enabled
395 * after reset it's a full speed device */
396 if (!(EHCI_RD(hub->registers->portsc[port]) &
397 USB_PORTSC_ENABLED_FLAG)) {
398 EHCI_SET(hub->registers->portsc[port],
399 USB_PORTSC_PORT_OWNER_FLAG);
400 } else {
401 hub->reset_flag[port] = true;
402 }
403
404 return EOK;
405 case USB_HUB_FEATURE_PORT_POWER: /*8*/
406 EHCI_SET(hub->registers->portsc[port],
407 USB_PORTSC_PORT_POWER_FLAG);
408 return EOK;
409 default:
410 return ENOTSUP;
411 }
412}
413
414/** Status change handler.
415 * @param device Virtual hub device
416 * @param endpoint Endpoint number
417 * @param tr_type Transfer type
418 * @param buffer Response destination
419 * @param buffer_size Bytes available in buffer
420 * @param actual_size Size us the used part of the dest buffer.
421 *
422 * Produces status mask. Bit 0 indicates hub status change the other bits
423 * represent port status change. Endian does not matter as UHCI root hubs
424 * only need 1 byte.
425 */
426static int req_status_change_handler(usbvirt_device_t *device,
427 usb_endpoint_t endpoint, usb_transfer_type_t tr_type,
428 void *buffer, size_t buffer_size, size_t *actual_size)
429{
430 ehci_rh_t *hub = virthub_get_data(device);
431 assert(hub);
432
433 if (buffer_size < STATUS_BYTES(hub->port_count))
434 return ESTALL;
435
436 uint16_t mask = 0;
437 for (unsigned port = 0; port < hub->port_count; ++port) {
438 /* Write-clean bits are those that indicate change */
439 uint32_t status = EHCI_RD(hub->registers->portsc[port]);
440 if ((status & USB_PORTSC_WC_MASK)
441 || hub->reset_flag[port] || hub->reset_flag[port]) {
442 /* Ignore new LS device */
443 if ((status & USB_PORTSC_CONNECT_CH_FLAG) &&
444 (status & USB_PORTSC_LINE_STATUS_MASK) ==
445 USB_PORTSC_LINE_STATUS_K)
446 EHCI_SET(hub->registers->portsc[port],
447 USB_PORTSC_PORT_OWNER_FLAG);
448 else
449 mask |= (2 << port);
450 }
451 }
452
453 usb_log_debug2("EHCI root hub interrupt mask: %hx.\n", mask);
454
455 if (mask == 0)
456 return ENAK;
457 mask = uint16_host2usb(mask);
458 memcpy(buffer, &mask, STATUS_BYTES(hub->port_count));
459 *actual_size = STATUS_BYTES(hub->port_count);
460 return EOK;
461}
462
463/** EHCI root hub request handlers */
464static const usbvirt_control_request_handler_t control_transfer_handlers[] = {
465 {
466 STD_REQ_IN(USB_REQUEST_RECIPIENT_DEVICE, USB_DEVREQ_GET_DESCRIPTOR),
467 .name = "GetDescriptor",
468 .callback = virthub_base_get_hub_descriptor,
469 },
470 {
471 CLASS_REQ_IN(USB_REQUEST_RECIPIENT_DEVICE, USB_DEVREQ_GET_DESCRIPTOR),
472 .name = "GetDescriptor",
473 .callback = virthub_base_get_hub_descriptor,
474 },
475 {
476 CLASS_REQ_IN(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_GET_DESCRIPTOR),
477 .name = "GetHubDescriptor",
478 .callback = virthub_base_get_hub_descriptor,
479 },
480 {
481 CLASS_REQ_IN(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_GET_STATUS),
482 .name = "GetPortStatus",
483 .callback = req_get_port_status,
484 },
485 {
486 CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_CLEAR_FEATURE),
487 .name = "ClearHubFeature",
488 .callback = req_clear_hub_feature,
489 },
490 {
491 CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_CLEAR_FEATURE),
492 .name = "ClearPortFeature",
493 .callback = req_clear_port_feature,
494 },
495 {
496 CLASS_REQ_IN(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_GET_STATUS),
497 .name = "GetHubStatus",
498 .callback = req_get_status,
499 },
500 {
501 CLASS_REQ_IN(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_GET_STATUS),
502 .name = "GetPortStatus",
503 .callback = req_get_port_status,
504 },
505 {
506 CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_DEVICE, USB_HUB_REQUEST_SET_FEATURE),
507 .name = "SetHubFeature",
508 .callback = req_nop,
509 },
510 {
511 CLASS_REQ_OUT(USB_REQUEST_RECIPIENT_OTHER, USB_HUB_REQUEST_SET_FEATURE),
512 .name = "SetPortFeature",
513 .callback = req_set_port_feature,
514 },
515 {
516 .callback = NULL
517 }
518};
519
520/** Virtual EHCI root hub ops */
521static usbvirt_device_ops_t ops = {
522 .control = control_transfer_handlers,
523 .data_in[HUB_STATUS_CHANGE_PIPE] = req_status_change_handler,
524};
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