source: mainline/uspace/drv/bus/usb/ohci/hc.c@ 1c1b577

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 1c1b577 was 57e06ef, checked in by Jan Vesely <jano.vesely@…>, 14 years ago

ohci: Minor improvements.

Remove unused member.
Fix comments.
Add const qualifiers and asserts.
  • Property mode set to 100644
File size: 19.0 KB
Line 
1/*
2 * Copyright (c) 2011 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 drvusbohcihc
29 * @{
30 */
31/** @file
32 * @brief OHCI Host controller driver routines
33 */
34#include <errno.h>
35#include <str_error.h>
36#include <adt/list.h>
37#include <libarch/ddi.h>
38
39#include <usb/debug.h>
40#include <usb/usb.h>
41#include <usb/ddfiface.h>
42
43#include "hc.h"
44#include "ohci_endpoint.h"
45
46#define OHCI_USED_INTERRUPTS \
47 (I_SO | I_WDH | I_UE | I_RHSC)
48
49static const irq_cmd_t ohci_irq_commands[] =
50{
51 { .cmd = CMD_MEM_READ_32, .dstarg = 1, .addr = NULL /*filled later*/ },
52 { .cmd = CMD_BTEST, .srcarg = 1, .dstarg = 2, .value = OHCI_USED_INTERRUPTS },
53 { .cmd = CMD_PREDICATE, .srcarg = 2, .value = 2 },
54 { .cmd = CMD_MEM_WRITE_A_32, .srcarg = 1, .addr = NULL /*filled later*/ },
55 { .cmd = CMD_ACCEPT },
56};
57
58static void hc_gain_control(hc_t *instance);
59static void hc_start(hc_t *instance);
60static int hc_init_transfer_lists(hc_t *instance);
61static int hc_init_memory(hc_t *instance);
62static int interrupt_emulator(hc_t *instance);
63static int hc_schedule(hcd_t *hcd, usb_transfer_batch_t *batch);
64/*----------------------------------------------------------------------------*/
65/** Get number of commands used in IRQ code.
66 * @return Number of commands.
67 */
68size_t hc_irq_cmd_count(void)
69{
70 return sizeof(ohci_irq_commands) / sizeof(irq_cmd_t);
71}
72/*----------------------------------------------------------------------------*/
73/** Generate IRQ code commands.
74 * @param[out] cmds Place to store the commands.
75 * @param[in] cmd_size Size of the place (bytes).
76 * @param[in] regs Physical address of device's registers.
77 * @param[in] reg_size Size of the register area (bytes).
78 *
79 * @return Error code.
80 */
81int hc_get_irq_commands(
82 irq_cmd_t cmds[], size_t cmd_size, uintptr_t regs, size_t reg_size)
83{
84 if (cmd_size < sizeof(ohci_irq_commands)
85 || reg_size < sizeof(ohci_regs_t))
86 return EOVERFLOW;
87
88 /* Create register mapping to use in IRQ handler.
89 * This mapping should be present in kernel only.
90 * Remove it from here when kernel knows how to create mappings
91 * and accepts physical addresses in IRQ code.
92 * TODO: remove */
93 ohci_regs_t *registers;
94 const int ret = pio_enable((void*)regs, reg_size, (void**)&registers);
95 if (ret != EOK)
96 return ret;
97
98 /* Some bogus access to force create mapping. DO NOT remove,
99 * unless whole virtual addresses in irq is replaced
100 * NOTE: Compiler won't remove this as ohci_regs_t members
101 * are declared volatile.
102 *
103 * Introducing CMD_MEM set of IRQ code commands broke
104 * assumption that IRQ code does not cause page faults.
105 * If this happens during idling (THREAD == NULL)
106 * it causes kernel panic.
107 */
108 registers->revision;
109
110 memcpy(cmds, ohci_irq_commands, sizeof(ohci_irq_commands));
111
112 void *address = (void*)&registers->interrupt_status;
113 cmds[0].addr = address;
114 cmds[3].addr = address;
115 return EOK;
116}
117/*----------------------------------------------------------------------------*/
118/** Announce OHCI root hub to the DDF
119 *
120 * @param[in] instance OHCI driver intance
121 * @param[in] hub_fun DDF fuction representing OHCI root hub
122 * @return Error code
123 */
124int hc_register_hub(hc_t *instance, ddf_fun_t *hub_fun)
125{
126 assert(instance);
127 assert(hub_fun);
128
129 const usb_address_t hub_address =
130 usb_device_manager_get_free_address(
131 &instance->generic.dev_manager, USB_SPEED_FULL);
132 if (hub_address <= 0) {
133 usb_log_error("Failed to get OHCI root hub address: %s\n",
134 str_error(hub_address));
135 return hub_address;
136 }
137 instance->rh.address = hub_address;
138 usb_device_manager_bind(
139 &instance->generic.dev_manager, hub_address, hub_fun->handle);
140
141#define CHECK_RET_UNREG_RETURN(ret, message...) \
142if (ret != EOK) { \
143 usb_log_error(message); \
144 usb_endpoint_manager_remove_ep( \
145 &instance->generic.ep_manager, hub_address, 0, USB_DIRECTION_BOTH, \
146 NULL, NULL);\
147 usb_device_manager_release( \
148 &instance->generic.dev_manager, hub_address); \
149 return ret; \
150} else (void)0
151 int ret = usb_endpoint_manager_add_ep(
152 &instance->generic.ep_manager, hub_address, 0, USB_DIRECTION_BOTH,
153 USB_TRANSFER_CONTROL, USB_SPEED_FULL, 64, 0, NULL, NULL);
154 CHECK_RET_UNREG_RETURN(ret,
155 "Failed to register root hub control endpoint: %s.\n",
156 str_error(ret));
157
158 ret = ddf_fun_add_match_id(hub_fun, "usb&class=hub", 100);
159 CHECK_RET_UNREG_RETURN(ret,
160 "Failed to add root hub match-id: %s.\n", str_error(ret));
161
162 ret = ddf_fun_bind(hub_fun);
163 CHECK_RET_UNREG_RETURN(ret,
164 "Failed to bind root hub function: %s.\n", str_error(ret));
165
166 return EOK;
167#undef CHECK_RET_RELEASE
168}
169/*----------------------------------------------------------------------------*/
170/** Initialize OHCI hc driver structure
171 *
172 * @param[in] instance Memory place for the structure.
173 * @param[in] regs Address of the memory mapped I/O registers.
174 * @param[in] reg_size Size of the memory mapped area.
175 * @param[in] interrupts True if w interrupts should be used
176 * @return Error code
177 */
178int hc_init(hc_t *instance, uintptr_t regs, size_t reg_size, bool interrupts)
179{
180 assert(instance);
181
182#define CHECK_RET_RETURN(ret, message...) \
183if (ret != EOK) { \
184 usb_log_error(message); \
185 return ret; \
186} else (void)0
187
188 int ret =
189 pio_enable((void*)regs, reg_size, (void**)&instance->registers);
190 CHECK_RET_RETURN(ret,
191 "Failed to gain access to device registers: %s.\n", str_error(ret));
192
193 list_initialize(&instance->pending_batches);
194
195 hcd_init(&instance->generic, BANDWIDTH_AVAILABLE_USB11,
196 bandwidth_count_usb11);
197 instance->generic.private_data = instance;
198 instance->generic.schedule = hc_schedule;
199 instance->generic.ep_add_hook = ohci_endpoint_init;
200 instance->generic.ep_remove_hook = ohci_endpoint_fini;
201
202 ret = hc_init_memory(instance);
203 CHECK_RET_RETURN(ret, "Failed to create OHCI memory structures: %s.\n",
204 str_error(ret));
205#undef CHECK_RET_RETURN
206
207 fibril_mutex_initialize(&instance->guard);
208
209 hc_gain_control(instance);
210
211 if (!interrupts) {
212 instance->interrupt_emulator =
213 fibril_create((int(*)(void*))interrupt_emulator, instance);
214 fibril_add_ready(instance->interrupt_emulator);
215 }
216
217 rh_init(&instance->rh, instance->registers);
218 hc_start(instance);
219
220 return EOK;
221}
222/*----------------------------------------------------------------------------*/
223void hc_enqueue_endpoint(hc_t *instance, const endpoint_t *ep)
224{
225 assert(instance);
226 assert(ep);
227
228 endpoint_list_t *list = &instance->lists[ep->transfer_type];
229 ohci_endpoint_t *ohci_ep = ohci_endpoint_get(ep);
230 assert(list);
231 assert(ohci_ep);
232
233 /* Enqueue ep */
234 switch (ep->transfer_type) {
235 case USB_TRANSFER_CONTROL:
236 instance->registers->control &= ~C_CLE;
237 endpoint_list_add_ep(list, ohci_ep);
238 instance->registers->control_current = 0;
239 instance->registers->control |= C_CLE;
240 break;
241 case USB_TRANSFER_BULK:
242 instance->registers->control &= ~C_BLE;
243 endpoint_list_add_ep(list, ohci_ep);
244 instance->registers->control |= C_BLE;
245 break;
246 case USB_TRANSFER_ISOCHRONOUS:
247 case USB_TRANSFER_INTERRUPT:
248 instance->registers->control &= (~C_PLE & ~C_IE);
249 endpoint_list_add_ep(list, ohci_ep);
250 instance->registers->control |= C_PLE | C_IE;
251 break;
252 }
253}
254/*----------------------------------------------------------------------------*/
255void hc_dequeue_endpoint(hc_t *instance, const endpoint_t *ep)
256{
257 assert(instance);
258 assert(ep);
259
260 /* Dequeue ep */
261 endpoint_list_t *list = &instance->lists[ep->transfer_type];
262 ohci_endpoint_t *ohci_ep = ohci_endpoint_get(ep);
263
264 assert(list);
265 assert(ohci_ep);
266 switch (ep->transfer_type) {
267 case USB_TRANSFER_CONTROL:
268 instance->registers->control &= ~C_CLE;
269 endpoint_list_remove_ep(list, ohci_ep);
270 instance->registers->control_current = 0;
271 instance->registers->control |= C_CLE;
272 break;
273 case USB_TRANSFER_BULK:
274 instance->registers->control &= ~C_BLE;
275 endpoint_list_remove_ep(list, ohci_ep);
276 instance->registers->control |= C_BLE;
277 break;
278 case USB_TRANSFER_ISOCHRONOUS:
279 case USB_TRANSFER_INTERRUPT:
280 instance->registers->control &= (~C_PLE & ~C_IE);
281 endpoint_list_remove_ep(list, ohci_ep);
282 instance->registers->control |= C_PLE | C_IE;
283 break;
284 default:
285 break;
286 }
287}
288/*----------------------------------------------------------------------------*/
289/** Add USB transfer to the schedule.
290 *
291 * @param[in] instance OHCI hc driver structure.
292 * @param[in] batch Batch representing the transfer.
293 * @return Error code.
294 */
295int hc_schedule(hcd_t *hcd, usb_transfer_batch_t *batch)
296{
297 assert(hcd);
298 hc_t *instance = hcd->private_data;
299 assert(instance);
300
301 /* Check for root hub communication */
302 if (batch->ep->address == instance->rh.address) {
303 rh_request(&instance->rh, batch);
304 return EOK;
305 }
306 ohci_transfer_batch_t *ohci_batch = ohci_transfer_batch_get(batch);
307 if (!ohci_batch)
308 return ENOMEM;
309
310 fibril_mutex_lock(&instance->guard);
311 list_append(&ohci_batch->link, &instance->pending_batches);
312 ohci_transfer_batch_commit(ohci_batch);
313
314 /* Control and bulk schedules need a kick to start working */
315 switch (batch->ep->transfer_type)
316 {
317 case USB_TRANSFER_CONTROL:
318 instance->registers->command_status |= CS_CLF;
319 break;
320 case USB_TRANSFER_BULK:
321 instance->registers->command_status |= CS_BLF;
322 break;
323 default:
324 break;
325 }
326 fibril_mutex_unlock(&instance->guard);
327 return EOK;
328}
329/*----------------------------------------------------------------------------*/
330/** Interrupt handling routine
331 *
332 * @param[in] instance OHCI hc driver structure.
333 * @param[in] status Value of the status register at the time of interrupt.
334 */
335void hc_interrupt(hc_t *instance, uint32_t status)
336{
337 assert(instance);
338 if ((status & ~I_SF) == 0) /* ignore sof status */
339 return;
340 usb_log_debug2("OHCI(%p) interrupt: %x.\n", instance, status);
341 if (status & I_RHSC)
342 rh_interrupt(&instance->rh);
343
344 if (status & I_WDH) {
345 fibril_mutex_lock(&instance->guard);
346 usb_log_debug2("HCCA: %p-%#" PRIx32 " (%p).\n", instance->hcca,
347 instance->registers->hcca,
348 (void *) addr_to_phys(instance->hcca));
349 usb_log_debug2("Periodic current: %#" PRIx32 ".\n",
350 instance->registers->periodic_current);
351
352 link_t *current = list_first(&instance->pending_batches);
353 while (current && current != &instance->pending_batches.head) {
354 link_t *next = current->next;
355 ohci_transfer_batch_t *batch =
356 ohci_transfer_batch_from_link(current);
357
358 if (ohci_transfer_batch_is_complete(batch)) {
359 list_remove(current);
360 ohci_transfer_batch_finish_dispose(batch);
361 }
362
363 current = next;
364 }
365 fibril_mutex_unlock(&instance->guard);
366 }
367
368 if (status & I_UE) {
369 usb_log_fatal("Error like no other!\n");
370 hc_start(instance);
371 }
372
373}
374/*----------------------------------------------------------------------------*/
375/** Check status register regularly
376 *
377 * @param[in] instance OHCI hc driver structure.
378 * @return Error code
379 */
380int interrupt_emulator(hc_t *instance)
381{
382 assert(instance);
383 usb_log_info("Started interrupt emulator.\n");
384 while (1) {
385 const uint32_t status = instance->registers->interrupt_status;
386 instance->registers->interrupt_status = status;
387 hc_interrupt(instance, status);
388 async_usleep(10000);
389 }
390 return EOK;
391}
392/*----------------------------------------------------------------------------*/
393/** Turn off any (BIOS)driver that might be in control of the device.
394 *
395 * This function implements routines described in chapter 5.1.1.3 of the OHCI
396 * specification (page 40, pdf page 54).
397 *
398 * @param[in] instance OHCI hc driver structure.
399 */
400void hc_gain_control(hc_t *instance)
401{
402 assert(instance);
403
404 usb_log_debug("Requesting OHCI control.\n");
405 if (instance->registers->revision & R_LEGACY_FLAG) {
406 /* Turn off legacy emulation, it should be enough to zero
407 * the lowest bit, but it caused problems. Thus clear all
408 * except GateA20 (causes restart on some hw).
409 * See page 145 of the specs for details.
410 */
411 volatile uint32_t *ohci_emulation_reg =
412 (uint32_t*)((char*)instance->registers + LEGACY_REGS_OFFSET);
413 usb_log_debug("OHCI legacy register %p: %x.\n",
414 ohci_emulation_reg, *ohci_emulation_reg);
415 /* Zero everything but A20State */
416 *ohci_emulation_reg &= 0x100;
417 usb_log_debug(
418 "OHCI legacy register (should be 0 or 0x100) %p: %x.\n",
419 ohci_emulation_reg, *ohci_emulation_reg);
420 }
421
422 /* Interrupt routing enabled => smm driver is active */
423 if (instance->registers->control & C_IR) {
424 usb_log_debug("SMM driver: request ownership change.\n");
425 instance->registers->command_status |= CS_OCR;
426 /* Hope that SMM actually knows its stuff or we can hang here */
427 while (instance->registers->control & C_IR) {
428 async_usleep(1000);
429 }
430 usb_log_info("SMM driver: Ownership taken.\n");
431 C_HCFS_SET(instance->registers->control, C_HCFS_RESET);
432 async_usleep(50000);
433 return;
434 }
435
436 const unsigned hc_status = C_HCFS_GET(instance->registers->control);
437 /* Interrupt routing disabled && status != USB_RESET => BIOS active */
438 if (hc_status != C_HCFS_RESET) {
439 usb_log_debug("BIOS driver found.\n");
440 if (hc_status == C_HCFS_OPERATIONAL) {
441 usb_log_info("BIOS driver: HC operational.\n");
442 return;
443 }
444 /* HC is suspended assert resume for 20ms, */
445 C_HCFS_SET(instance->registers->control, C_HCFS_RESUME);
446 async_usleep(20000);
447 usb_log_info("BIOS driver: HC resumed.\n");
448 return;
449 }
450
451 /* HC is in reset (hw startup) => no other driver
452 * maintain reset for at least the time specified in USB spec (50 ms)*/
453 usb_log_debug("Host controller found in reset state.\n");
454 async_usleep(50000);
455}
456/*----------------------------------------------------------------------------*/
457/** OHCI hw initialization routine.
458 *
459 * @param[in] instance OHCI hc driver structure.
460 */
461void hc_start(hc_t *instance)
462{
463 /* OHCI guide page 42 */
464 assert(instance);
465 usb_log_debug2("Started hc initialization routine.\n");
466
467 /* Save contents of fm_interval register */
468 const uint32_t fm_interval = instance->registers->fm_interval;
469 usb_log_debug2("Old value of HcFmInterval: %x.\n", fm_interval);
470
471 /* Reset hc */
472 usb_log_debug2("HC reset.\n");
473 size_t time = 0;
474 instance->registers->command_status = CS_HCR;
475 while (instance->registers->command_status & CS_HCR) {
476 async_usleep(10);
477 time += 10;
478 }
479 usb_log_debug2("HC reset complete in %zu us.\n", time);
480
481 /* Restore fm_interval */
482 instance->registers->fm_interval = fm_interval;
483 assert((instance->registers->command_status & CS_HCR) == 0);
484
485 /* hc is now in suspend state */
486 usb_log_debug2("HC should be in suspend state(%x).\n",
487 instance->registers->control);
488
489 /* Use HCCA */
490 instance->registers->hcca = addr_to_phys(instance->hcca);
491
492 /* Use queues */
493 instance->registers->bulk_head =
494 instance->lists[USB_TRANSFER_BULK].list_head_pa;
495 usb_log_debug2("Bulk HEAD set to: %p (%#" PRIx32 ").\n",
496 instance->lists[USB_TRANSFER_BULK].list_head,
497 instance->lists[USB_TRANSFER_BULK].list_head_pa);
498
499 instance->registers->control_head =
500 instance->lists[USB_TRANSFER_CONTROL].list_head_pa;
501 usb_log_debug2("Control HEAD set to: %p (%#" PRIx32 ").\n",
502 instance->lists[USB_TRANSFER_CONTROL].list_head,
503 instance->lists[USB_TRANSFER_CONTROL].list_head_pa);
504
505 /* Enable queues */
506 instance->registers->control |= (C_PLE | C_IE | C_CLE | C_BLE);
507 usb_log_debug2("All queues enabled(%x).\n",
508 instance->registers->control);
509
510 /* Enable interrupts */
511 instance->registers->interrupt_enable = OHCI_USED_INTERRUPTS;
512 usb_log_debug2("Enabled interrupts: %x.\n",
513 instance->registers->interrupt_enable);
514 instance->registers->interrupt_enable = I_MI;
515
516 /* Set periodic start to 90% */
517 uint32_t frame_length = ((fm_interval >> FMI_FI_SHIFT) & FMI_FI_MASK);
518 instance->registers->periodic_start = (frame_length / 10) * 9;
519 usb_log_debug2("All periodic start set to: %x(%u - 90%% of %d).\n",
520 instance->registers->periodic_start,
521 instance->registers->periodic_start, frame_length);
522
523 C_HCFS_SET(instance->registers->control, C_HCFS_OPERATIONAL);
524 usb_log_debug("OHCI HC up and running (ctl_reg=0x%x).\n",
525 instance->registers->control);
526}
527/*----------------------------------------------------------------------------*/
528/** Initialize schedule queues
529 *
530 * @param[in] instance OHCI hc driver structure
531 * @return Error code
532 */
533int hc_init_transfer_lists(hc_t *instance)
534{
535 assert(instance);
536#define SETUP_ENDPOINT_LIST(type) \
537do { \
538 const char *name = usb_str_transfer_type(type); \
539 int ret = endpoint_list_init(&instance->lists[type], name); \
540 if (ret != EOK) { \
541 usb_log_error("Failed to setup %s endpoint list: %s.\n", \
542 name, str_error(ret)); \
543 endpoint_list_fini(&instance->lists[USB_TRANSFER_ISOCHRONOUS]);\
544 endpoint_list_fini(&instance->lists[USB_TRANSFER_INTERRUPT]); \
545 endpoint_list_fini(&instance->lists[USB_TRANSFER_CONTROL]); \
546 endpoint_list_fini(&instance->lists[USB_TRANSFER_BULK]); \
547 return ret; \
548 } \
549} while (0)
550
551 SETUP_ENDPOINT_LIST(USB_TRANSFER_ISOCHRONOUS);
552 SETUP_ENDPOINT_LIST(USB_TRANSFER_INTERRUPT);
553 SETUP_ENDPOINT_LIST(USB_TRANSFER_CONTROL);
554 SETUP_ENDPOINT_LIST(USB_TRANSFER_BULK);
555#undef SETUP_ENDPOINT_LIST
556 endpoint_list_set_next(&instance->lists[USB_TRANSFER_INTERRUPT],
557 &instance->lists[USB_TRANSFER_ISOCHRONOUS]);
558
559 return EOK;
560}
561/*----------------------------------------------------------------------------*/
562/** Initialize memory structures used by the OHCI hcd.
563 *
564 * @param[in] instance OHCI hc driver structure.
565 * @return Error code.
566 */
567int hc_init_memory(hc_t *instance)
568{
569 assert(instance);
570
571 bzero(&instance->rh, sizeof(instance->rh));
572 /* Init queues */
573 const int ret = hc_init_transfer_lists(instance);
574 if (ret != EOK) {
575 return ret;
576 }
577
578 /*Init HCCA */
579 instance->hcca = hcca_get();
580 if (instance->hcca == NULL)
581 return ENOMEM;
582 bzero(instance->hcca, sizeof(hcca_t));
583 usb_log_debug2("OHCI HCCA initialized at %p.\n", instance->hcca);
584
585 for (unsigned i = 0; i < 32; ++i) {
586 instance->hcca->int_ep[i] =
587 instance->lists[USB_TRANSFER_INTERRUPT].list_head_pa;
588 }
589 usb_log_debug2("Interrupt HEADs set to: %p (%#" PRIx32 ").\n",
590 instance->lists[USB_TRANSFER_INTERRUPT].list_head,
591 instance->lists[USB_TRANSFER_INTERRUPT].list_head_pa);
592
593 return EOK;
594}
595
596/**
597 * @}
598 */
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