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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2015 MediaTek Inc.
4 * Author:
5 * Zhigang.Wei <zhigang.wei@mediatek.com>
6 * Chunfeng.Yun <chunfeng.yun@mediatek.com>
7 */
8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/slab.h>
12
13#include "xhci.h"
14#include "xhci-mtk.h"
15
16#define SSP_BW_BOUNDARY 130000
17#define SS_BW_BOUNDARY 51000
18/* table 5-5. High-speed Isoc Transaction Limits in usb_20 spec */
19#define HS_BW_BOUNDARY 6144
20/* usb2 spec section11.18.1: at most 188 FS bytes per microframe */
21#define FS_PAYLOAD_MAX 188
22/*
23 * max number of microframes for split transfer,
24 * for fs isoc in : 1 ss + 1 idle + 7 cs
25 */
26#define TT_MICROFRAMES_MAX 9
27
28/* mtk scheduler bitmasks */
29#define EP_BPKTS(p) ((p) & 0x7f)
30#define EP_BCSCOUNT(p) (((p) & 0x7) << 8)
31#define EP_BBM(p) ((p) << 11)
32#define EP_BOFFSET(p) ((p) & 0x3fff)
33#define EP_BREPEAT(p) (((p) & 0x7fff) << 16)
34
35static int is_fs_or_ls(enum usb_device_speed speed)
36{
37 return speed == USB_SPEED_FULL || speed == USB_SPEED_LOW;
38}
39
40/*
41* get the index of bandwidth domains array which @ep belongs to.
42*
43* the bandwidth domain array is saved to @sch_array of struct xhci_hcd_mtk,
44* each HS root port is treated as a single bandwidth domain,
45* but each SS root port is treated as two bandwidth domains, one for IN eps,
46* one for OUT eps.
47* @real_port value is defined as follow according to xHCI spec:
48* 1 for SSport0, ..., N+1 for SSportN, N+2 for HSport0, N+3 for HSport1, etc
49* so the bandwidth domain array is organized as follow for simplification:
50* SSport0-OUT, SSport0-IN, ..., SSportX-OUT, SSportX-IN, HSport0, ..., HSportY
51*/
52static int get_bw_index(struct xhci_hcd *xhci, struct usb_device *udev,
53 struct usb_host_endpoint *ep)
54{
55 struct xhci_virt_device *virt_dev;
56 int bw_index;
57
58 virt_dev = xhci->devs[udev->slot_id];
59
60 if (udev->speed >= USB_SPEED_SUPER) {
61 if (usb_endpoint_dir_out(&ep->desc))
62 bw_index = (virt_dev->real_port - 1) * 2;
63 else
64 bw_index = (virt_dev->real_port - 1) * 2 + 1;
65 } else {
66 /* add one more for each SS port */
67 bw_index = virt_dev->real_port + xhci->usb3_rhub.num_ports - 1;
68 }
69
70 return bw_index;
71}
72
73static u32 get_esit(struct xhci_ep_ctx *ep_ctx)
74{
75 u32 esit;
76
77 esit = 1 << CTX_TO_EP_INTERVAL(le32_to_cpu(ep_ctx->ep_info));
78 if (esit > XHCI_MTK_MAX_ESIT)
79 esit = XHCI_MTK_MAX_ESIT;
80
81 return esit;
82}
83
84static struct mu3h_sch_tt *find_tt(struct usb_device *udev)
85{
86 struct usb_tt *utt = udev->tt;
87 struct mu3h_sch_tt *tt, **tt_index, **ptt;
88 unsigned int port;
89 bool allocated_index = false;
90
91 if (!utt)
92 return NULL; /* Not below a TT */
93
94 /*
95 * Find/create our data structure.
96 * For hubs with a single TT, we get it directly.
97 * For hubs with multiple TTs, there's an extra level of pointers.
98 */
99 tt_index = NULL;
100 if (utt->multi) {
101 tt_index = utt->hcpriv;
102 if (!tt_index) { /* Create the index array */
103 tt_index = kcalloc(utt->hub->maxchild,
104 sizeof(*tt_index), GFP_KERNEL);
105 if (!tt_index)
106 return ERR_PTR(-ENOMEM);
107 utt->hcpriv = tt_index;
108 allocated_index = true;
109 }
110 port = udev->ttport - 1;
111 ptt = &tt_index[port];
112 } else {
113 port = 0;
114 ptt = (struct mu3h_sch_tt **) &utt->hcpriv;
115 }
116
117 tt = *ptt;
118 if (!tt) { /* Create the mu3h_sch_tt */
119 tt = kzalloc(sizeof(*tt), GFP_KERNEL);
120 if (!tt) {
121 if (allocated_index) {
122 utt->hcpriv = NULL;
123 kfree(tt_index);
124 }
125 return ERR_PTR(-ENOMEM);
126 }
127 INIT_LIST_HEAD(&tt->ep_list);
128 tt->usb_tt = utt;
129 tt->tt_port = port;
130 *ptt = tt;
131 }
132
133 return tt;
134}
135
136/* Release the TT above udev, if it's not in use */
137static void drop_tt(struct usb_device *udev)
138{
139 struct usb_tt *utt = udev->tt;
140 struct mu3h_sch_tt *tt, **tt_index, **ptt;
141 int i, cnt;
142
143 if (!utt || !utt->hcpriv)
144 return; /* Not below a TT, or never allocated */
145
146 cnt = 0;
147 if (utt->multi) {
148 tt_index = utt->hcpriv;
149 ptt = &tt_index[udev->ttport - 1];
150 /* How many entries are left in tt_index? */
151 for (i = 0; i < utt->hub->maxchild; ++i)
152 cnt += !!tt_index[i];
153 } else {
154 tt_index = NULL;
155 ptt = (struct mu3h_sch_tt **)&utt->hcpriv;
156 }
157
158 tt = *ptt;
159 if (!tt || !list_empty(&tt->ep_list))
160 return; /* never allocated , or still in use*/
161
162 *ptt = NULL;
163 kfree(tt);
164
165 if (cnt == 1) {
166 utt->hcpriv = NULL;
167 kfree(tt_index);
168 }
169}
170
171static struct mu3h_sch_ep_info *create_sch_ep(struct usb_device *udev,
172 struct usb_host_endpoint *ep, struct xhci_ep_ctx *ep_ctx)
173{
174 struct mu3h_sch_ep_info *sch_ep;
175 struct mu3h_sch_tt *tt = NULL;
176 u32 len_bw_budget_table;
177 size_t mem_size;
178
179 if (is_fs_or_ls(udev->speed))
180 len_bw_budget_table = TT_MICROFRAMES_MAX;
181 else if ((udev->speed >= USB_SPEED_SUPER)
182 && usb_endpoint_xfer_isoc(&ep->desc))
183 len_bw_budget_table = get_esit(ep_ctx);
184 else
185 len_bw_budget_table = 1;
186
187 mem_size = sizeof(struct mu3h_sch_ep_info) +
188 len_bw_budget_table * sizeof(u32);
189 sch_ep = kzalloc(mem_size, GFP_KERNEL);
190 if (!sch_ep)
191 return ERR_PTR(-ENOMEM);
192
193 if (is_fs_or_ls(udev->speed)) {
194 tt = find_tt(udev);
195 if (IS_ERR(tt)) {
196 kfree(sch_ep);
197 return ERR_PTR(-ENOMEM);
198 }
199 }
200
201 sch_ep->sch_tt = tt;
202 sch_ep->ep = ep;
203
204 return sch_ep;
205}
206
207static void setup_sch_info(struct usb_device *udev,
208 struct xhci_ep_ctx *ep_ctx, struct mu3h_sch_ep_info *sch_ep)
209{
210 u32 ep_type;
211 u32 maxpkt;
212 u32 max_burst;
213 u32 mult;
214 u32 esit_pkts;
215 u32 max_esit_payload;
216 u32 *bwb_table = sch_ep->bw_budget_table;
217 int i;
218
219 ep_type = CTX_TO_EP_TYPE(le32_to_cpu(ep_ctx->ep_info2));
220 maxpkt = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2));
221 max_burst = CTX_TO_MAX_BURST(le32_to_cpu(ep_ctx->ep_info2));
222 mult = CTX_TO_EP_MULT(le32_to_cpu(ep_ctx->ep_info));
223 max_esit_payload =
224 (CTX_TO_MAX_ESIT_PAYLOAD_HI(
225 le32_to_cpu(ep_ctx->ep_info)) << 16) |
226 CTX_TO_MAX_ESIT_PAYLOAD(le32_to_cpu(ep_ctx->tx_info));
227
228 sch_ep->esit = get_esit(ep_ctx);
229 sch_ep->ep_type = ep_type;
230 sch_ep->maxpkt = maxpkt;
231 sch_ep->offset = 0;
232 sch_ep->burst_mode = 0;
233 sch_ep->repeat = 0;
234
235 if (udev->speed == USB_SPEED_HIGH) {
236 sch_ep->cs_count = 0;
237
238 /*
239 * usb_20 spec section5.9
240 * a single microframe is enough for HS synchromous endpoints
241 * in a interval
242 */
243 sch_ep->num_budget_microframes = 1;
244
245 /*
246 * xHCI spec section6.2.3.4
247 * @max_burst is the number of additional transactions
248 * opportunities per microframe
249 */
250 sch_ep->pkts = max_burst + 1;
251 sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts;
252 bwb_table[0] = sch_ep->bw_cost_per_microframe;
253 } else if (udev->speed >= USB_SPEED_SUPER) {
254 /* usb3_r1 spec section4.4.7 & 4.4.8 */
255 sch_ep->cs_count = 0;
256 sch_ep->burst_mode = 1;
257 /*
258 * some device's (d)wBytesPerInterval is set as 0,
259 * then max_esit_payload is 0, so evaluate esit_pkts from
260 * mult and burst
261 */
262 esit_pkts = DIV_ROUND_UP(max_esit_payload, maxpkt);
263 if (esit_pkts == 0)
264 esit_pkts = (mult + 1) * (max_burst + 1);
265
266 if (ep_type == INT_IN_EP || ep_type == INT_OUT_EP) {
267 sch_ep->pkts = esit_pkts;
268 sch_ep->num_budget_microframes = 1;
269 bwb_table[0] = maxpkt * sch_ep->pkts;
270 }
271
272 if (ep_type == ISOC_IN_EP || ep_type == ISOC_OUT_EP) {
273 u32 remainder;
274
275 if (sch_ep->esit == 1)
276 sch_ep->pkts = esit_pkts;
277 else if (esit_pkts <= sch_ep->esit)
278 sch_ep->pkts = 1;
279 else
280 sch_ep->pkts = roundup_pow_of_two(esit_pkts)
281 / sch_ep->esit;
282
283 sch_ep->num_budget_microframes =
284 DIV_ROUND_UP(esit_pkts, sch_ep->pkts);
285
286 sch_ep->repeat = !!(sch_ep->num_budget_microframes > 1);
287 sch_ep->bw_cost_per_microframe = maxpkt * sch_ep->pkts;
288
289 remainder = sch_ep->bw_cost_per_microframe;
290 remainder *= sch_ep->num_budget_microframes;
291 remainder -= (maxpkt * esit_pkts);
292 for (i = 0; i < sch_ep->num_budget_microframes - 1; i++)
293 bwb_table[i] = sch_ep->bw_cost_per_microframe;
294
295 /* last one <= bw_cost_per_microframe */
296 bwb_table[i] = remainder;
297 }
298 } else if (is_fs_or_ls(udev->speed)) {
299 sch_ep->pkts = 1; /* at most one packet for each microframe */
300
301 /*
302 * num_budget_microframes and cs_count will be updated when
303 * check TT for INT_OUT_EP, ISOC/INT_IN_EP type
304 */
305 sch_ep->cs_count = DIV_ROUND_UP(maxpkt, FS_PAYLOAD_MAX);
306 sch_ep->num_budget_microframes = sch_ep->cs_count;
307 sch_ep->bw_cost_per_microframe =
308 (maxpkt < FS_PAYLOAD_MAX) ? maxpkt : FS_PAYLOAD_MAX;
309
310 /* init budget table */
311 if (ep_type == ISOC_OUT_EP) {
312 for (i = 0; i < sch_ep->num_budget_microframes; i++)
313 bwb_table[i] = sch_ep->bw_cost_per_microframe;
314 } else if (ep_type == INT_OUT_EP) {
315 /* only first one consumes bandwidth, others as zero */
316 bwb_table[0] = sch_ep->bw_cost_per_microframe;
317 } else { /* INT_IN_EP or ISOC_IN_EP */
318 bwb_table[0] = 0; /* start split */
319 bwb_table[1] = 0; /* idle */
320 /*
321 * due to cs_count will be updated according to cs
322 * position, assign all remainder budget array
323 * elements as @bw_cost_per_microframe, but only first
324 * @num_budget_microframes elements will be used later
325 */
326 for (i = 2; i < TT_MICROFRAMES_MAX; i++)
327 bwb_table[i] = sch_ep->bw_cost_per_microframe;
328 }
329 }
330}
331
332/* Get maximum bandwidth when we schedule at offset slot. */
333static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw,
334 struct mu3h_sch_ep_info *sch_ep, u32 offset)
335{
336 u32 num_esit;
337 u32 max_bw = 0;
338 u32 bw;
339 int i;
340 int j;
341
342 num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
343 for (i = 0; i < num_esit; i++) {
344 u32 base = offset + i * sch_ep->esit;
345
346 for (j = 0; j < sch_ep->num_budget_microframes; j++) {
347 bw = sch_bw->bus_bw[base + j] +
348 sch_ep->bw_budget_table[j];
349 if (bw > max_bw)
350 max_bw = bw;
351 }
352 }
353 return max_bw;
354}
355
356static void update_bus_bw(struct mu3h_sch_bw_info *sch_bw,
357 struct mu3h_sch_ep_info *sch_ep, bool used)
358{
359 u32 num_esit;
360 u32 base;
361 int i;
362 int j;
363
364 num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
365 for (i = 0; i < num_esit; i++) {
366 base = sch_ep->offset + i * sch_ep->esit;
367 for (j = 0; j < sch_ep->num_budget_microframes; j++) {
368 if (used)
369 sch_bw->bus_bw[base + j] +=
370 sch_ep->bw_budget_table[j];
371 else
372 sch_bw->bus_bw[base + j] -=
373 sch_ep->bw_budget_table[j];
374 }
375 }
376}
377
378static int check_sch_tt(struct usb_device *udev,
379 struct mu3h_sch_ep_info *sch_ep, u32 offset)
380{
381 struct mu3h_sch_tt *tt = sch_ep->sch_tt;
382 u32 extra_cs_count;
383 u32 fs_budget_start;
384 u32 start_ss, last_ss;
385 u32 start_cs, last_cs;
386 int i;
387
388 start_ss = offset % 8;
389 fs_budget_start = (start_ss + 1) % 8;
390
391 if (sch_ep->ep_type == ISOC_OUT_EP) {
392 last_ss = start_ss + sch_ep->cs_count - 1;
393
394 /*
395 * usb_20 spec section11.18:
396 * must never schedule Start-Split in Y6
397 */
398 if (!(start_ss == 7 || last_ss < 6))
399 return -ERANGE;
400
401 for (i = 0; i < sch_ep->cs_count; i++)
402 if (test_bit(offset + i, tt->split_bit_map))
403 return -ERANGE;
404
405 } else {
406 u32 cs_count = DIV_ROUND_UP(sch_ep->maxpkt, FS_PAYLOAD_MAX);
407
408 /*
409 * usb_20 spec section11.18:
410 * must never schedule Start-Split in Y6
411 */
412 if (start_ss == 6)
413 return -ERANGE;
414
415 /* one uframe for ss + one uframe for idle */
416 start_cs = (start_ss + 2) % 8;
417 last_cs = start_cs + cs_count - 1;
418
419 if (last_cs > 7)
420 return -ERANGE;
421
422 if (sch_ep->ep_type == ISOC_IN_EP)
423 extra_cs_count = (last_cs == 7) ? 1 : 2;
424 else /* ep_type : INTR IN / INTR OUT */
425 extra_cs_count = (fs_budget_start == 6) ? 1 : 2;
426
427 cs_count += extra_cs_count;
428 if (cs_count > 7)
429 cs_count = 7; /* HW limit */
430
431 for (i = 0; i < cs_count + 2; i++) {
432 if (test_bit(offset + i, tt->split_bit_map))
433 return -ERANGE;
434 }
435
436 sch_ep->cs_count = cs_count;
437 /* one for ss, the other for idle */
438 sch_ep->num_budget_microframes = cs_count + 2;
439
440 /*
441 * if interval=1, maxp >752, num_budge_micoframe is larger
442 * than sch_ep->esit, will overstep boundary
443 */
444 if (sch_ep->num_budget_microframes > sch_ep->esit)
445 sch_ep->num_budget_microframes = sch_ep->esit;
446 }
447
448 return 0;
449}
450
451static void update_sch_tt(struct usb_device *udev,
452 struct mu3h_sch_ep_info *sch_ep)
453{
454 struct mu3h_sch_tt *tt = sch_ep->sch_tt;
455 u32 base, num_esit;
456 int i, j;
457
458 num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
459 for (i = 0; i < num_esit; i++) {
460 base = sch_ep->offset + i * sch_ep->esit;
461 for (j = 0; j < sch_ep->num_budget_microframes; j++)
462 set_bit(base + j, tt->split_bit_map);
463 }
464
465 list_add_tail(&sch_ep->tt_endpoint, &tt->ep_list);
466}
467
468static int check_sch_bw(struct usb_device *udev,
469 struct mu3h_sch_bw_info *sch_bw, struct mu3h_sch_ep_info *sch_ep)
470{
471 u32 offset;
472 u32 esit;
473 u32 min_bw;
474 u32 min_index;
475 u32 worst_bw;
476 u32 bw_boundary;
477 u32 min_num_budget;
478 u32 min_cs_count;
479 bool tt_offset_ok = false;
480 int ret;
481
482 esit = sch_ep->esit;
483
484 /*
485 * Search through all possible schedule microframes.
486 * and find a microframe where its worst bandwidth is minimum.
487 */
488 min_bw = ~0;
489 min_index = 0;
490 min_cs_count = sch_ep->cs_count;
491 min_num_budget = sch_ep->num_budget_microframes;
492 for (offset = 0; offset < esit; offset++) {
493 if (is_fs_or_ls(udev->speed)) {
494 ret = check_sch_tt(udev, sch_ep, offset);
495 if (ret)
496 continue;
497 else
498 tt_offset_ok = true;
499 }
500
501 if ((offset + sch_ep->num_budget_microframes) > sch_ep->esit)
502 break;
503
504 worst_bw = get_max_bw(sch_bw, sch_ep, offset);
505 if (min_bw > worst_bw) {
506 min_bw = worst_bw;
507 min_index = offset;
508 min_cs_count = sch_ep->cs_count;
509 min_num_budget = sch_ep->num_budget_microframes;
510 }
511 if (min_bw == 0)
512 break;
513 }
514
515 if (udev->speed == USB_SPEED_SUPER_PLUS)
516 bw_boundary = SSP_BW_BOUNDARY;
517 else if (udev->speed == USB_SPEED_SUPER)
518 bw_boundary = SS_BW_BOUNDARY;
519 else
520 bw_boundary = HS_BW_BOUNDARY;
521
522 /* check bandwidth */
523 if (min_bw > bw_boundary)
524 return -ERANGE;
525
526 sch_ep->offset = min_index;
527 sch_ep->cs_count = min_cs_count;
528 sch_ep->num_budget_microframes = min_num_budget;
529
530 if (is_fs_or_ls(udev->speed)) {
531 /* all offset for tt is not ok*/
532 if (!tt_offset_ok)
533 return -ERANGE;
534
535 update_sch_tt(udev, sch_ep);
536 }
537
538 /* update bus bandwidth info */
539 update_bus_bw(sch_bw, sch_ep, 1);
540
541 return 0;
542}
543
544static bool need_bw_sch(struct usb_host_endpoint *ep,
545 enum usb_device_speed speed, int has_tt)
546{
547 /* only for periodic endpoints */
548 if (usb_endpoint_xfer_control(&ep->desc)
549 || usb_endpoint_xfer_bulk(&ep->desc))
550 return false;
551
552 /*
553 * for LS & FS periodic endpoints which its device is not behind
554 * a TT are also ignored, root-hub will schedule them directly,
555 * but need set @bpkts field of endpoint context to 1.
556 */
557 if (is_fs_or_ls(speed) && !has_tt)
558 return false;
559
560 /* skip endpoint with zero maxpkt */
561 if (usb_endpoint_maxp(&ep->desc) == 0)
562 return false;
563
564 return true;
565}
566
567int xhci_mtk_sch_init(struct xhci_hcd_mtk *mtk)
568{
569 struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd);
570 struct mu3h_sch_bw_info *sch_array;
571 int num_usb_bus;
572 int i;
573
574 /* ss IN and OUT are separated */
575 num_usb_bus = xhci->usb3_rhub.num_ports * 2 + xhci->usb2_rhub.num_ports;
576
577 sch_array = kcalloc(num_usb_bus, sizeof(*sch_array), GFP_KERNEL);
578 if (sch_array == NULL)
579 return -ENOMEM;
580
581 for (i = 0; i < num_usb_bus; i++)
582 INIT_LIST_HEAD(&sch_array[i].bw_ep_list);
583
584 mtk->sch_array = sch_array;
585
586 return 0;
587}
588EXPORT_SYMBOL_GPL(xhci_mtk_sch_init);
589
590void xhci_mtk_sch_exit(struct xhci_hcd_mtk *mtk)
591{
592 kfree(mtk->sch_array);
593}
594EXPORT_SYMBOL_GPL(xhci_mtk_sch_exit);
595
596int xhci_mtk_add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
597 struct usb_host_endpoint *ep)
598{
599 struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
600 struct xhci_hcd *xhci;
601 struct xhci_ep_ctx *ep_ctx;
602 struct xhci_slot_ctx *slot_ctx;
603 struct xhci_virt_device *virt_dev;
604 struct mu3h_sch_bw_info *sch_bw;
605 struct mu3h_sch_ep_info *sch_ep;
606 struct mu3h_sch_bw_info *sch_array;
607 unsigned int ep_index;
608 int bw_index;
609 int ret = 0;
610
611 xhci = hcd_to_xhci(hcd);
612 virt_dev = xhci->devs[udev->slot_id];
613 ep_index = xhci_get_endpoint_index(&ep->desc);
614 slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
615 ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
616 sch_array = mtk->sch_array;
617
618 xhci_dbg(xhci, "%s() type:%d, speed:%d, mpkt:%d, dir:%d, ep:%p\n",
619 __func__, usb_endpoint_type(&ep->desc), udev->speed,
620 usb_endpoint_maxp(&ep->desc),
621 usb_endpoint_dir_in(&ep->desc), ep);
622
623 if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT)) {
624 /*
625 * set @bpkts to 1 if it is LS or FS periodic endpoint, and its
626 * device does not connected through an external HS hub
627 */
628 if (usb_endpoint_xfer_int(&ep->desc)
629 || usb_endpoint_xfer_isoc(&ep->desc))
630 ep_ctx->reserved[0] |= cpu_to_le32(EP_BPKTS(1));
631
632 return 0;
633 }
634
635 bw_index = get_bw_index(xhci, udev, ep);
636 sch_bw = &sch_array[bw_index];
637
638 sch_ep = create_sch_ep(udev, ep, ep_ctx);
639 if (IS_ERR_OR_NULL(sch_ep))
640 return -ENOMEM;
641
642 setup_sch_info(udev, ep_ctx, sch_ep);
643
644 ret = check_sch_bw(udev, sch_bw, sch_ep);
645 if (ret) {
646 xhci_err(xhci, "Not enough bandwidth!\n");
647 if (is_fs_or_ls(udev->speed))
648 drop_tt(udev);
649
650 kfree(sch_ep);
651 return -ENOSPC;
652 }
653
654 list_add_tail(&sch_ep->endpoint, &sch_bw->bw_ep_list);
655
656 ep_ctx->reserved[0] |= cpu_to_le32(EP_BPKTS(sch_ep->pkts)
657 | EP_BCSCOUNT(sch_ep->cs_count) | EP_BBM(sch_ep->burst_mode));
658 ep_ctx->reserved[1] |= cpu_to_le32(EP_BOFFSET(sch_ep->offset)
659 | EP_BREPEAT(sch_ep->repeat));
660
661 xhci_dbg(xhci, " PKTS:%x, CSCOUNT:%x, BM:%x, OFFSET:%x, REPEAT:%x\n",
662 sch_ep->pkts, sch_ep->cs_count, sch_ep->burst_mode,
663 sch_ep->offset, sch_ep->repeat);
664
665 return 0;
666}
667EXPORT_SYMBOL_GPL(xhci_mtk_add_ep_quirk);
668
669void xhci_mtk_drop_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
670 struct usb_host_endpoint *ep)
671{
672 struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
673 struct xhci_hcd *xhci;
674 struct xhci_slot_ctx *slot_ctx;
675 struct xhci_virt_device *virt_dev;
676 struct mu3h_sch_bw_info *sch_array;
677 struct mu3h_sch_bw_info *sch_bw;
678 struct mu3h_sch_ep_info *sch_ep;
679 int bw_index;
680
681 xhci = hcd_to_xhci(hcd);
682 virt_dev = xhci->devs[udev->slot_id];
683 slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
684 sch_array = mtk->sch_array;
685
686 xhci_dbg(xhci, "%s() type:%d, speed:%d, mpks:%d, dir:%d, ep:%p\n",
687 __func__, usb_endpoint_type(&ep->desc), udev->speed,
688 usb_endpoint_maxp(&ep->desc),
689 usb_endpoint_dir_in(&ep->desc), ep);
690
691 if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT))
692 return;
693
694 bw_index = get_bw_index(xhci, udev, ep);
695 sch_bw = &sch_array[bw_index];
696
697 list_for_each_entry(sch_ep, &sch_bw->bw_ep_list, endpoint) {
698 if (sch_ep->ep == ep) {
699 update_bus_bw(sch_bw, sch_ep, 0);
700 list_del(&sch_ep->endpoint);
701 if (is_fs_or_ls(udev->speed)) {
702 list_del(&sch_ep->tt_endpoint);
703 drop_tt(udev);
704 }
705 kfree(sch_ep);
706 break;
707 }
708 }
709}
710EXPORT_SYMBOL_GPL(xhci_mtk_drop_ep_quirk);