source: mainline/uspace/drv/uhci-hcd/uhci.c@ 67352d2

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 67352d2 was 67352d2, checked in by Jan Vesely <jano.vesely@…>, 14 years ago

Debug output fixes and refactoring (less spam, more readability)
  • Property mode set to 100644
File size: 15.7 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 usb
29 * @{
30 */
31/** @file
32 * @brief UHCI driver
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#include <usb_iface.h>
43
44#include "uhci.h"
45#include "iface.h"
46
47static irq_cmd_t uhci_cmds[] = {
48 {
49 .cmd = CMD_PIO_READ_16,
50 .addr = NULL, /* patched for every instance */
51 .dstarg = 1
52 },
53 {
54 .cmd = CMD_PIO_WRITE_16,
55 .addr = NULL, /* pathed for every instance */
56 .value = 0x1f
57 },
58 {
59 .cmd = CMD_ACCEPT
60 }
61};
62
63/** Gets USB address of the calling device.
64 *
65 * @param[in] fun UHCI hc function.
66 * @param[in] handle Handle of the device seeking address.
67 * @param[out] address Place to store found address.
68 * @return Error code.
69 */
70static int usb_iface_get_address(
71 ddf_fun_t *fun, devman_handle_t handle, usb_address_t *address)
72{
73 assert(fun);
74 uhci_t *hc = fun_to_uhci(fun);
75 assert(hc);
76
77 usb_address_t addr = device_keeper_find(&hc->device_manager,
78 handle);
79 if (addr < 0) {
80 return addr;
81 }
82
83 if (address != NULL) {
84 *address = addr;
85 }
86
87 return EOK;
88}
89/*----------------------------------------------------------------------------*/
90static usb_iface_t hc_usb_iface = {
91 .get_hc_handle = usb_iface_get_hc_handle_hc_impl,
92 .get_address = usb_iface_get_address
93};
94/*----------------------------------------------------------------------------*/
95static ddf_dev_ops_t uhci_ops = {
96 .interfaces[USB_DEV_IFACE] = &hc_usb_iface,
97 .interfaces[USBHC_DEV_IFACE] = &uhci_iface,
98};
99/*----------------------------------------------------------------------------*/
100static int uhci_init_transfer_lists(uhci_t *instance);
101static int uhci_init_mem_structures(uhci_t *instance);
102static void uhci_init_hw(uhci_t *instance);
103
104static int uhci_interrupt_emulator(void *arg);
105static int uhci_debug_checker(void *arg);
106
107static bool allowed_usb_packet(
108 bool low_speed, usb_transfer_type_t transfer, size_t size);
109/*----------------------------------------------------------------------------*/
110/** Initializes UHCI hcd driver structure
111 *
112 * @param[in] instance Memory place to initialize.
113 * @param[in] dev DDF device.
114 * @param[in] regs Address of I/O control registers.
115 * @param[in] size Size of I/O control registers.
116 * @return Error code.
117 * @note Should be called only once on any structure.
118 */
119int uhci_init(uhci_t *instance, ddf_dev_t *dev, void *regs, size_t reg_size)
120{
121 assert(reg_size >= sizeof(regs_t));
122 int ret;
123
124#define CHECK_RET_DEST_FUN_RETURN(ret, message...) \
125 if (ret != EOK) { \
126 usb_log_error(message); \
127 if (instance->ddf_instance) \
128 ddf_fun_destroy(instance->ddf_instance); \
129 return ret; \
130 } else (void) 0
131
132 /* Create UHCI function. */
133 instance->ddf_instance = ddf_fun_create(dev, fun_exposed, "uhci");
134 ret = (instance->ddf_instance == NULL) ? ENOMEM : EOK;
135 CHECK_RET_DEST_FUN_RETURN(ret,
136 "Failed to create UHCI device function.\n");
137
138 instance->ddf_instance->ops = &uhci_ops;
139 instance->ddf_instance->driver_data = instance;
140
141 ret = ddf_fun_bind(instance->ddf_instance);
142 CHECK_RET_DEST_FUN_RETURN(ret,
143 "Failed(%d) to bind UHCI device function: %s.\n",
144 ret, str_error(ret));
145
146 /* allow access to hc control registers */
147 regs_t *io;
148 ret = pio_enable(regs, reg_size, (void**)&io);
149 CHECK_RET_DEST_FUN_RETURN(ret,
150 "Failed(%d) to gain access to registers at %p: %s.\n",
151 ret, str_error(ret), io);
152 instance->registers = io;
153 usb_log_debug("Device registers at %p(%u) accessible.\n",
154 io, reg_size);
155
156 ret = uhci_init_mem_structures(instance);
157 CHECK_RET_DEST_FUN_RETURN(ret,
158 "Failed to initialize UHCI memory structures.\n");
159
160 uhci_init_hw(instance);
161 instance->cleaner =
162 fibril_create(uhci_interrupt_emulator, instance);
163 fibril_add_ready(instance->cleaner);
164
165 instance->debug_checker = fibril_create(uhci_debug_checker, instance);
166 fibril_add_ready(instance->debug_checker);
167
168 usb_log_info("Started UHCI driver.\n");
169 return EOK;
170#undef CHECK_RET_DEST_FUN_RETURN
171}
172/*----------------------------------------------------------------------------*/
173/** Initializes UHCI hcd hw resources.
174 *
175 * @param[in] instance UHCI structure to use.
176 */
177void uhci_init_hw(uhci_t *instance)
178{
179 assert(instance);
180 regs_t *registers = instance->registers;
181
182 /* Reset everything, who knows what touched it before us */
183 pio_write_16(&registers->usbcmd, UHCI_CMD_GLOBAL_RESET);
184 async_usleep(10000); /* 10ms according to USB spec */
185 pio_write_16(&registers->usbcmd, 0);
186
187 /* Reset hc, all states and counters */
188 pio_write_16(&registers->usbcmd, UHCI_CMD_HCRESET);
189 do { async_usleep(10); }
190 while ((pio_read_16(&registers->usbcmd) & UHCI_CMD_HCRESET) != 0);
191
192 /* Set framelist pointer */
193 const uint32_t pa = addr_to_phys(instance->frame_list);
194 pio_write_32(&registers->flbaseadd, pa);
195
196 /* Enable all interrupts, but resume interrupt */
197// pio_write_16(&instance->registers->usbintr,
198// UHCI_INTR_CRC | UHCI_INTR_COMPLETE | UHCI_INTR_SHORT_PACKET);
199
200 uint16_t status = pio_read_16(&registers->usbcmd);
201 if (status != 0)
202 usb_log_warning("Previous command value: %x.\n", status);
203
204 /* Start the hc with large(64B) packet FSBR */
205 pio_write_16(&registers->usbcmd,
206 UHCI_CMD_RUN_STOP | UHCI_CMD_MAX_PACKET | UHCI_CMD_CONFIGURE);
207}
208/*----------------------------------------------------------------------------*/
209/** Initializes UHCI hcd memory structures.
210 *
211 * @param[in] instance UHCI structure to use.
212 * @return Error code
213 * @note Should be called only once on any structure.
214 */
215int uhci_init_mem_structures(uhci_t *instance)
216{
217 assert(instance);
218#define CHECK_RET_DEST_CMDS_RETURN(ret, message...) \
219 if (ret != EOK) { \
220 usb_log_error(message); \
221 if (instance->interrupt_code.cmds != NULL) \
222 free(instance->interrupt_code.cmds); \
223 return ret; \
224 } else (void) 0
225
226 /* Init interrupt code */
227 instance->interrupt_code.cmds = malloc(sizeof(uhci_cmds));
228 int ret = (instance->interrupt_code.cmds == NULL) ? ENOMEM : EOK;
229 CHECK_RET_DEST_CMDS_RETURN(ret,
230 "Failed to allocate interrupt cmds space.\n");
231
232 {
233 irq_cmd_t *interrupt_commands = instance->interrupt_code.cmds;
234 memcpy(interrupt_commands, uhci_cmds, sizeof(uhci_cmds));
235 interrupt_commands[0].addr =
236 (void*)&instance->registers->usbsts;
237 interrupt_commands[1].addr =
238 (void*)&instance->registers->usbsts;
239 instance->interrupt_code.cmdcount =
240 sizeof(uhci_cmds) / sizeof(irq_cmd_t);
241 }
242
243 /* Init transfer lists */
244 ret = uhci_init_transfer_lists(instance);
245 CHECK_RET_DEST_CMDS_RETURN(ret, "Failed to init transfer lists.\n");
246 usb_log_debug("Initialized transfer lists.\n");
247
248 /* Init USB frame list page*/
249 instance->frame_list = get_page();
250 ret = instance ? EOK : ENOMEM;
251 CHECK_RET_DEST_CMDS_RETURN(ret, "Failed to get frame list page.\n");
252 usb_log_debug("Initialized frame list.\n");
253
254 /* Set all frames to point to the first queue head */
255 const uint32_t queue =
256 instance->transfers_interrupt.queue_head_pa
257 | LINK_POINTER_QUEUE_HEAD_FLAG;
258
259 unsigned i = 0;
260 for(; i < UHCI_FRAME_LIST_COUNT; ++i) {
261 instance->frame_list[i] = queue;
262 }
263
264 /* Init device keeper*/
265 device_keeper_init(&instance->device_manager);
266 usb_log_debug("Initialized device manager.\n");
267
268 return EOK;
269#undef CHECK_RET_DEST_CMDS_RETURN
270}
271/*----------------------------------------------------------------------------*/
272/** Initializes UHCI hcd transfer lists.
273 *
274 * @param[in] instance UHCI structure to use.
275 * @return Error code
276 * @note Should be called only once on any structure.
277 */
278int uhci_init_transfer_lists(uhci_t *instance)
279{
280 assert(instance);
281#define CHECK_RET_CLEAR_RETURN(ret, message...) \
282 if (ret != EOK) { \
283 usb_log_error(message); \
284 transfer_list_fini(&instance->transfers_bulk_full); \
285 transfer_list_fini(&instance->transfers_control_full); \
286 transfer_list_fini(&instance->transfers_control_slow); \
287 transfer_list_fini(&instance->transfers_interrupt); \
288 return ret; \
289 } else (void) 0
290
291 /* initialize TODO: check errors */
292 int ret;
293 ret = transfer_list_init(&instance->transfers_bulk_full, "BULK_FULL");
294 CHECK_RET_CLEAR_RETURN(ret, "Failed to init BULK list.");
295
296 ret = transfer_list_init(
297 &instance->transfers_control_full, "CONTROL_FULL");
298 CHECK_RET_CLEAR_RETURN(ret, "Failed to init CONTROL FULL list.");
299
300 ret = transfer_list_init(
301 &instance->transfers_control_slow, "CONTROL_SLOW");
302 CHECK_RET_CLEAR_RETURN(ret, "Failed to init CONTROL SLOW list.");
303
304 ret = transfer_list_init(&instance->transfers_interrupt, "INTERRUPT");
305 CHECK_RET_CLEAR_RETURN(ret, "Failed to init INTERRUPT list.");
306
307 transfer_list_set_next(&instance->transfers_control_full,
308 &instance->transfers_bulk_full);
309 transfer_list_set_next(&instance->transfers_control_slow,
310 &instance->transfers_control_full);
311 transfer_list_set_next(&instance->transfers_interrupt,
312 &instance->transfers_control_slow);
313
314 /*FSBR*/
315#ifdef FSBR
316 transfer_list_set_next(&instance->transfers_bulk_full,
317 &instance->transfers_control_full);
318#endif
319
320 /* Assign pointers to be used during scheduling */
321 instance->transfers[USB_SPEED_FULL][USB_TRANSFER_INTERRUPT] =
322 &instance->transfers_interrupt;
323 instance->transfers[USB_SPEED_LOW][USB_TRANSFER_INTERRUPT] =
324 &instance->transfers_interrupt;
325 instance->transfers[USB_SPEED_FULL][USB_TRANSFER_CONTROL] =
326 &instance->transfers_control_full;
327 instance->transfers[USB_SPEED_LOW][USB_TRANSFER_CONTROL] =
328 &instance->transfers_control_slow;
329 instance->transfers[USB_SPEED_FULL][USB_TRANSFER_BULK] =
330 &instance->transfers_bulk_full;
331
332 return EOK;
333#undef CHECK_RET_CLEAR_RETURN
334}
335/*----------------------------------------------------------------------------*/
336/** Schedules batch for execution.
337 *
338 * @param[in] instance UHCI structure to use.
339 * @param[in] batch Transfer batch to schedule.
340 * @return Error code
341 */
342int uhci_schedule(uhci_t *instance, batch_t *batch)
343{
344 assert(instance);
345 assert(batch);
346 const int low_speed = (batch->speed == USB_SPEED_LOW);
347 if (!allowed_usb_packet(
348 low_speed, batch->transfer_type, batch->max_packet_size)) {
349 usb_log_warning(
350 "Invalid USB packet specified %s SPEED %d %zu.\n",
351 low_speed ? "LOW" : "FULL" , batch->transfer_type,
352 batch->max_packet_size);
353 return ENOTSUP;
354 }
355 /* TODO: check available bandwith here */
356
357 transfer_list_t *list =
358 instance->transfers[batch->speed][batch->transfer_type];
359 assert(list);
360 transfer_list_add_batch(list, batch);
361
362 return EOK;
363}
364/*----------------------------------------------------------------------------*/
365/** Takes action based on the interrupt cause.
366 *
367 * @param[in] instance UHCI structure to use.
368 * @param[in] status Value of the stsatus regiser at the time of interrupt.
369 */
370void uhci_interrupt(uhci_t *instance, uint16_t status)
371{
372 assert(instance);
373 /* TODO: Check interrupt cause here */
374 /* Lower 2 bits are transaction error and transaction complete */
375 if (status & 0x3) {
376 transfer_list_remove_finished(&instance->transfers_interrupt);
377 transfer_list_remove_finished(&instance->transfers_control_slow);
378 transfer_list_remove_finished(&instance->transfers_control_full);
379 transfer_list_remove_finished(&instance->transfers_bulk_full);
380 }
381}
382/*----------------------------------------------------------------------------*/
383/** Polling function, emulates interrupts.
384 *
385 * @param[in] arg UHCI structure to use.
386 * @return EOK
387 */
388int uhci_interrupt_emulator(void* arg)
389{
390 usb_log_debug("Started interrupt emulator.\n");
391 uhci_t *instance = (uhci_t*)arg;
392 assert(instance);
393
394 while (1) {
395 /* read and ack interrupts */
396 uint16_t status = pio_read_16(&instance->registers->usbsts);
397 pio_write_16(&instance->registers->usbsts, 0x1f);
398 if (status != 0)
399 usb_log_debug2("UHCI status: %x.\n", status);
400 uhci_interrupt(instance, status);
401 async_usleep(UHCI_CLEANER_TIMEOUT);
402 }
403 return EOK;
404}
405/*---------------------------------------------------------------------------*/
406/** Debug function, checks consistency of memory structures.
407 *
408 * @param[in] arg UHCI structure to use.
409 * @return EOK
410 */
411int uhci_debug_checker(void *arg)
412{
413 uhci_t *instance = (uhci_t*)arg;
414 assert(instance);
415
416#define QH(queue) \
417 instance->transfers_##queue.queue_head
418
419 while (1) {
420 const uint16_t cmd = pio_read_16(&instance->registers->usbcmd);
421 const uint16_t sts = pio_read_16(&instance->registers->usbsts);
422 const uint16_t intr =
423 pio_read_16(&instance->registers->usbintr);
424
425 if (((cmd & UHCI_CMD_RUN_STOP) != 1) || (sts != 0)) {
426 usb_log_debug2("Command: %X Status: %X Intr: %x\n",
427 cmd, sts, intr);
428 }
429
430 uintptr_t frame_list =
431 pio_read_32(&instance->registers->flbaseadd) & ~0xfff;
432 if (frame_list != addr_to_phys(instance->frame_list)) {
433 usb_log_debug("Framelist address: %p vs. %p.\n",
434 frame_list, addr_to_phys(instance->frame_list));
435 }
436
437 int frnum = pio_read_16(&instance->registers->frnum) & 0x3ff;
438
439 uintptr_t expected_pa = instance->frame_list[frnum] & (~0xf);
440 uintptr_t real_pa = addr_to_phys(QH(interrupt));
441 if (expected_pa != real_pa) {
442 usb_log_debug("Interrupt QH: %p(frame: %d) vs. %p.\n",
443 expected_pa, frnum, real_pa);
444 }
445
446 expected_pa = QH(interrupt)->next_queue & (~0xf);
447 real_pa = addr_to_phys(QH(control_slow));
448 if (expected_pa != real_pa) {
449 usb_log_debug("Control Slow QH: %p vs. %p.\n",
450 expected_pa, real_pa);
451 }
452
453 expected_pa = QH(control_slow)->next_queue & (~0xf);
454 real_pa = addr_to_phys(QH(control_full));
455 if (expected_pa != real_pa) {
456 usb_log_debug("Control Full QH: %p vs. %p.\n",
457 expected_pa, real_pa);
458 }
459
460 expected_pa = QH(control_full)->next_queue & (~0xf);
461 real_pa = addr_to_phys(QH(bulk_full));
462 if (expected_pa != real_pa ) {
463 usb_log_debug("Bulk QH: %p vs. %p.\n",
464 expected_pa, real_pa);
465 }
466 async_usleep(UHCI_DEBUGER_TIMEOUT);
467 }
468 return EOK;
469#undef QH
470}
471/*----------------------------------------------------------------------------*/
472/** Checks transfer packets, for USB validity
473 *
474 * @param[in] low_speed Transfer speed.
475 * @param[in] transfer Transer type
476 * @param[in] size Maximum size of used packets
477 * @return EOK
478 */
479bool allowed_usb_packet(
480 bool low_speed, usb_transfer_type_t transfer, size_t size)
481{
482 /* see USB specification chapter 5.5-5.8 for magic numbers used here */
483 switch(transfer)
484 {
485 case USB_TRANSFER_ISOCHRONOUS:
486 return (!low_speed && size < 1024);
487 case USB_TRANSFER_INTERRUPT:
488 return size <= (low_speed ? 8 : 64);
489 case USB_TRANSFER_CONTROL: /* device specifies its own max size */
490 return (size <= (low_speed ? 8 : 64));
491 case USB_TRANSFER_BULK: /* device specifies its own max size */
492 return (!low_speed && size <= 64);
493 }
494 return false;
495}
496/**
497 * @}
498 */
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