Loading...
1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 */
8#include <linux/delay.h>
9#include <linux/slab.h>
10#include "common.h"
11#include "pipe.h"
12
13/*
14 * macros
15 */
16#define usbhsp_addr_offset(p) ((usbhs_pipe_number(p) - 1) * 2)
17
18#define usbhsp_flags_set(p, f) ((p)->flags |= USBHS_PIPE_FLAGS_##f)
19#define usbhsp_flags_clr(p, f) ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
20#define usbhsp_flags_has(p, f) ((p)->flags & USBHS_PIPE_FLAGS_##f)
21#define usbhsp_flags_init(p) do {(p)->flags = 0; } while (0)
22
23/*
24 * for debug
25 */
26static char *usbhsp_pipe_name[] = {
27 [USB_ENDPOINT_XFER_CONTROL] = "DCP",
28 [USB_ENDPOINT_XFER_BULK] = "BULK",
29 [USB_ENDPOINT_XFER_INT] = "INT",
30 [USB_ENDPOINT_XFER_ISOC] = "ISO",
31};
32
33char *usbhs_pipe_name(struct usbhs_pipe *pipe)
34{
35 return usbhsp_pipe_name[usbhs_pipe_type(pipe)];
36}
37
38static struct renesas_usbhs_driver_pipe_config
39*usbhsp_get_pipe_config(struct usbhs_priv *priv, int pipe_num)
40{
41 struct renesas_usbhs_driver_pipe_config *pipe_configs =
42 usbhs_get_dparam(priv, pipe_configs);
43
44 return &pipe_configs[pipe_num];
45}
46
47/*
48 * DCPCTR/PIPEnCTR functions
49 */
50static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
51{
52 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
53 int offset = usbhsp_addr_offset(pipe);
54
55 if (usbhs_pipe_is_dcp(pipe))
56 usbhs_bset(priv, DCPCTR, mask, val);
57 else
58 usbhs_bset(priv, PIPEnCTR + offset, mask, val);
59}
60
61static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
62{
63 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
64 int offset = usbhsp_addr_offset(pipe);
65
66 if (usbhs_pipe_is_dcp(pipe))
67 return usbhs_read(priv, DCPCTR);
68 else
69 return usbhs_read(priv, PIPEnCTR + offset);
70}
71
72/*
73 * DCP/PIPE functions
74 */
75static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
76 u16 dcp_reg, u16 pipe_reg,
77 u16 mask, u16 val)
78{
79 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
80
81 if (usbhs_pipe_is_dcp(pipe))
82 usbhs_bset(priv, dcp_reg, mask, val);
83 else
84 usbhs_bset(priv, pipe_reg, mask, val);
85}
86
87static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
88 u16 dcp_reg, u16 pipe_reg)
89{
90 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
91
92 if (usbhs_pipe_is_dcp(pipe))
93 return usbhs_read(priv, dcp_reg);
94 else
95 return usbhs_read(priv, pipe_reg);
96}
97
98/*
99 * DCPCFG/PIPECFG functions
100 */
101static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
102{
103 __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
104}
105
106static u16 usbhsp_pipe_cfg_get(struct usbhs_pipe *pipe)
107{
108 return __usbhsp_pipe_xxx_get(pipe, DCPCFG, PIPECFG);
109}
110
111/*
112 * PIPEnTRN/PIPEnTRE functions
113 */
114static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
115{
116 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
117 struct device *dev = usbhs_priv_to_dev(priv);
118 int num = usbhs_pipe_number(pipe);
119 u16 reg;
120
121 /*
122 * It is impossible to calculate address,
123 * since PIPEnTRN addresses were mapped randomly.
124 */
125#define CASE_PIPExTRN(a) \
126 case 0x ## a: \
127 reg = PIPE ## a ## TRN; \
128 break;
129
130 switch (num) {
131 CASE_PIPExTRN(1);
132 CASE_PIPExTRN(2);
133 CASE_PIPExTRN(3);
134 CASE_PIPExTRN(4);
135 CASE_PIPExTRN(5);
136 CASE_PIPExTRN(B);
137 CASE_PIPExTRN(C);
138 CASE_PIPExTRN(D);
139 CASE_PIPExTRN(E);
140 CASE_PIPExTRN(F);
141 CASE_PIPExTRN(9);
142 CASE_PIPExTRN(A);
143 default:
144 dev_err(dev, "unknown pipe (%d)\n", num);
145 return;
146 }
147 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
148}
149
150static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
151{
152 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
153 struct device *dev = usbhs_priv_to_dev(priv);
154 int num = usbhs_pipe_number(pipe);
155 u16 reg;
156
157 /*
158 * It is impossible to calculate address,
159 * since PIPEnTRE addresses were mapped randomly.
160 */
161#define CASE_PIPExTRE(a) \
162 case 0x ## a: \
163 reg = PIPE ## a ## TRE; \
164 break;
165
166 switch (num) {
167 CASE_PIPExTRE(1);
168 CASE_PIPExTRE(2);
169 CASE_PIPExTRE(3);
170 CASE_PIPExTRE(4);
171 CASE_PIPExTRE(5);
172 CASE_PIPExTRE(B);
173 CASE_PIPExTRE(C);
174 CASE_PIPExTRE(D);
175 CASE_PIPExTRE(E);
176 CASE_PIPExTRE(F);
177 CASE_PIPExTRE(9);
178 CASE_PIPExTRE(A);
179 default:
180 dev_err(dev, "unknown pipe (%d)\n", num);
181 return;
182 }
183
184 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
185}
186
187/*
188 * PIPEBUF
189 */
190static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
191{
192 if (usbhs_pipe_is_dcp(pipe))
193 return;
194
195 __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
196}
197
198/*
199 * DCPMAXP/PIPEMAXP
200 */
201static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
202{
203 __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
204}
205
206/*
207 * pipe control functions
208 */
209static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
210{
211 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
212
213 /*
214 * On pipe, this is necessary before
215 * accesses to below registers.
216 *
217 * PIPESEL : usbhsp_pipe_select
218 * PIPECFG : usbhsp_pipe_cfg_xxx
219 * PIPEBUF : usbhsp_pipe_buf_xxx
220 * PIPEMAXP : usbhsp_pipe_maxp_xxx
221 * PIPEPERI
222 */
223
224 /*
225 * if pipe is dcp, no pipe is selected.
226 * it is no problem, because dcp have its register
227 */
228 usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
229}
230
231static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
232{
233 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
234 int timeout = 1024;
235 u16 mask = usbhs_mod_is_host(priv) ? (CSSTS | PID_MASK) : PID_MASK;
236
237 /*
238 * make sure....
239 *
240 * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
241 * specified by the CURPIPE bits.
242 * When changing the setting of this bit after changing
243 * the PID bits for the selected pipe from BUF to NAK,
244 * check that CSSTS = 0 and PBUSY = 0.
245 */
246
247 /*
248 * CURPIPE bit = 0
249 *
250 * see also
251 * "Operation"
252 * - "Pipe Control"
253 * - "Pipe Control Registers Switching Procedure"
254 */
255 usbhs_write(priv, CFIFOSEL, 0);
256 usbhs_pipe_disable(pipe);
257
258 do {
259 if (!(usbhsp_pipectrl_get(pipe) & mask))
260 return 0;
261
262 udelay(10);
263
264 } while (timeout--);
265
266 return -EBUSY;
267}
268
269int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
270{
271 u16 val;
272
273 val = usbhsp_pipectrl_get(pipe);
274 if (val & BSTS)
275 return 0;
276
277 return -EBUSY;
278}
279
280bool usbhs_pipe_contains_transmittable_data(struct usbhs_pipe *pipe)
281{
282 u16 val;
283
284 /* Do not support for DCP pipe */
285 if (usbhs_pipe_is_dcp(pipe))
286 return false;
287
288 val = usbhsp_pipectrl_get(pipe);
289 if (val & INBUFM)
290 return true;
291
292 return false;
293}
294
295/*
296 * PID ctrl
297 */
298static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
299{
300 u16 pid = usbhsp_pipectrl_get(pipe);
301
302 pid &= PID_MASK;
303
304 /*
305 * see
306 * "Pipe n Control Register" - "PID"
307 */
308 switch (pid) {
309 case PID_STALL11:
310 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
311 fallthrough;
312 case PID_STALL10:
313 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
314 }
315}
316
317void usbhs_pipe_disable(struct usbhs_pipe *pipe)
318{
319 int timeout = 1024;
320 u16 val;
321
322 /* see "Pipe n Control Register" - "PID" */
323 __usbhsp_pid_try_nak_if_stall(pipe);
324
325 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
326
327 do {
328 val = usbhsp_pipectrl_get(pipe);
329 val &= PBUSY;
330 if (!val)
331 break;
332
333 udelay(10);
334 } while (timeout--);
335}
336
337void usbhs_pipe_enable(struct usbhs_pipe *pipe)
338{
339 /* see "Pipe n Control Register" - "PID" */
340 __usbhsp_pid_try_nak_if_stall(pipe);
341
342 usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
343}
344
345void usbhs_pipe_stall(struct usbhs_pipe *pipe)
346{
347 u16 pid = usbhsp_pipectrl_get(pipe);
348
349 pid &= PID_MASK;
350
351 /*
352 * see
353 * "Pipe n Control Register" - "PID"
354 */
355 switch (pid) {
356 case PID_NAK:
357 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
358 break;
359 case PID_BUF:
360 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
361 break;
362 }
363}
364
365int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
366{
367 u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
368
369 return (int)(pid == PID_STALL10 || pid == PID_STALL11);
370}
371
372void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
373{
374 if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
375 return;
376
377 /*
378 * clear and disable transfer counter for IN/OUT pipe
379 */
380 usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
381
382 /*
383 * Only IN direction bulk pipe can use transfer count.
384 * Without using this function,
385 * received data will break if it was large data size.
386 * see PIPEnTRN/PIPEnTRE for detail
387 */
388 if (usbhs_pipe_is_dir_in(pipe)) {
389 int maxp = usbhs_pipe_get_maxpacket(pipe);
390
391 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
392 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
393 }
394}
395
396
397/*
398 * pipe setup
399 */
400static int usbhsp_setup_pipecfg(struct usbhs_pipe *pipe, int is_host,
401 int dir_in, u16 *pipecfg)
402{
403 u16 type = 0;
404 u16 bfre = 0;
405 u16 dblb = 0;
406 u16 cntmd = 0;
407 u16 dir = 0;
408 u16 epnum = 0;
409 u16 shtnak = 0;
410 static const u16 type_array[] = {
411 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
412 [USB_ENDPOINT_XFER_INT] = TYPE_INT,
413 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
414 };
415
416 if (usbhs_pipe_is_dcp(pipe))
417 return -EINVAL;
418
419 /*
420 * PIPECFG
421 *
422 * see
423 * - "Register Descriptions" - "PIPECFG" register
424 * - "Features" - "Pipe configuration"
425 * - "Operation" - "Pipe Control"
426 */
427
428 /* TYPE */
429 type = type_array[usbhs_pipe_type(pipe)];
430
431 /* BFRE */
432 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
433 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
434 bfre = 0; /* FIXME */
435
436 /* DBLB: see usbhs_pipe_config_update() */
437
438 /* CNTMD */
439 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
440 cntmd = 0; /* FIXME */
441
442 /* DIR */
443 if (dir_in)
444 usbhsp_flags_set(pipe, IS_DIR_HOST);
445
446 if (!!is_host ^ !!dir_in)
447 dir |= DIR_OUT;
448
449 if (!dir)
450 usbhsp_flags_set(pipe, IS_DIR_IN);
451
452 /* SHTNAK */
453 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
454 !dir)
455 shtnak = SHTNAK;
456
457 /* EPNUM */
458 epnum = 0; /* see usbhs_pipe_config_update() */
459 *pipecfg = type |
460 bfre |
461 dblb |
462 cntmd |
463 dir |
464 shtnak |
465 epnum;
466 return 0;
467}
468
469static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
470{
471 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
472 struct device *dev = usbhs_priv_to_dev(priv);
473 int pipe_num = usbhs_pipe_number(pipe);
474 u16 buff_size;
475 u16 bufnmb;
476 u16 bufnmb_cnt;
477 struct renesas_usbhs_driver_pipe_config *pipe_config =
478 usbhsp_get_pipe_config(priv, pipe_num);
479
480 /*
481 * PIPEBUF
482 *
483 * see
484 * - "Register Descriptions" - "PIPEBUF" register
485 * - "Features" - "Pipe configuration"
486 * - "Operation" - "FIFO Buffer Memory"
487 * - "Operation" - "Pipe Control"
488 */
489 buff_size = pipe_config->bufsize;
490 bufnmb = pipe_config->bufnum;
491
492 /* change buff_size to register value */
493 bufnmb_cnt = (buff_size / 64) - 1;
494
495 dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
496 pipe_num, buff_size, bufnmb);
497
498 return (0x1f & bufnmb_cnt) << 10 |
499 (0xff & bufnmb) << 0;
500}
501
502void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
503 u16 epnum, u16 maxp)
504{
505 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
506 int pipe_num = usbhs_pipe_number(pipe);
507 struct renesas_usbhs_driver_pipe_config *pipe_config =
508 usbhsp_get_pipe_config(priv, pipe_num);
509 u16 dblb = pipe_config->double_buf ? DBLB : 0;
510
511 if (devsel > 0xA) {
512 struct device *dev = usbhs_priv_to_dev(priv);
513
514 dev_err(dev, "devsel error %d\n", devsel);
515
516 devsel = 0;
517 }
518
519 usbhsp_pipe_barrier(pipe);
520
521 pipe->maxp = maxp;
522
523 usbhsp_pipe_select(pipe);
524 usbhsp_pipe_maxp_set(pipe, 0xFFFF,
525 (devsel << 12) |
526 maxp);
527
528 if (!usbhs_pipe_is_dcp(pipe))
529 usbhsp_pipe_cfg_set(pipe, 0x000F | DBLB, epnum | dblb);
530}
531
532/*
533 * pipe control
534 */
535int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
536{
537 /*
538 * see
539 * usbhs_pipe_config_update()
540 * usbhs_dcp_malloc()
541 */
542 return pipe->maxp;
543}
544
545int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
546{
547 return usbhsp_flags_has(pipe, IS_DIR_IN);
548}
549
550int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
551{
552 return usbhsp_flags_has(pipe, IS_DIR_HOST);
553}
554
555int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
556{
557 return usbhsp_flags_has(pipe, IS_RUNNING);
558}
559
560void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
561{
562 if (running)
563 usbhsp_flags_set(pipe, IS_RUNNING);
564 else
565 usbhsp_flags_clr(pipe, IS_RUNNING);
566}
567
568void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
569{
570 u16 mask = (SQCLR | SQSET);
571 u16 val;
572
573 /*
574 * sequence
575 * 0 : data0
576 * 1 : data1
577 * -1 : no change
578 */
579 switch (sequence) {
580 case 0:
581 val = SQCLR;
582 break;
583 case 1:
584 val = SQSET;
585 break;
586 default:
587 return;
588 }
589
590 usbhsp_pipectrl_set(pipe, mask, val);
591}
592
593static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
594{
595 return !!(usbhsp_pipectrl_get(pipe) & SQMON);
596}
597
598void usbhs_pipe_clear(struct usbhs_pipe *pipe)
599{
600 if (usbhs_pipe_is_dcp(pipe)) {
601 usbhs_fifo_clear_dcp(pipe);
602 } else {
603 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
604 usbhsp_pipectrl_set(pipe, ACLRM, 0);
605 }
606}
607
608/* Should call usbhsp_pipe_select() before */
609void usbhs_pipe_clear_without_sequence(struct usbhs_pipe *pipe,
610 int needs_bfre, int bfre_enable)
611{
612 int sequence;
613
614 usbhsp_pipe_select(pipe);
615 sequence = usbhs_pipe_get_data_sequence(pipe);
616 if (needs_bfre)
617 usbhsp_pipe_cfg_set(pipe, BFRE, bfre_enable ? BFRE : 0);
618 usbhs_pipe_clear(pipe);
619 usbhs_pipe_data_sequence(pipe, sequence);
620}
621
622void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
623{
624 if (usbhs_pipe_is_dcp(pipe))
625 return;
626
627 usbhsp_pipe_select(pipe);
628 /* check if the driver needs to change the BFRE value */
629 if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
630 return;
631
632 usbhs_pipe_clear_without_sequence(pipe, 1, enable);
633}
634
635static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
636{
637 struct usbhs_pipe *pos, *pipe;
638 int i;
639
640 /*
641 * find target pipe
642 */
643 pipe = NULL;
644 usbhs_for_each_pipe_with_dcp(pos, priv, i) {
645 if (!usbhs_pipe_type_is(pos, type))
646 continue;
647 if (usbhsp_flags_has(pos, IS_USED))
648 continue;
649
650 pipe = pos;
651 break;
652 }
653
654 if (!pipe)
655 return NULL;
656
657 /*
658 * initialize pipe flags
659 */
660 usbhsp_flags_init(pipe);
661 usbhsp_flags_set(pipe, IS_USED);
662
663 return pipe;
664}
665
666static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
667{
668 usbhsp_flags_init(pipe);
669}
670
671void usbhs_pipe_init(struct usbhs_priv *priv,
672 int (*dma_map_ctrl)(struct device *dma_dev,
673 struct usbhs_pkt *pkt, int map))
674{
675 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
676 struct usbhs_pipe *pipe;
677 int i;
678
679 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
680 usbhsp_flags_init(pipe);
681 pipe->fifo = NULL;
682 pipe->mod_private = NULL;
683 INIT_LIST_HEAD(&pipe->list);
684
685 /* pipe force init */
686 usbhs_pipe_clear(pipe);
687 }
688
689 info->dma_map_ctrl = dma_map_ctrl;
690}
691
692struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
693 int endpoint_type,
694 int dir_in)
695{
696 struct device *dev = usbhs_priv_to_dev(priv);
697 struct usbhs_pipe *pipe;
698 int is_host = usbhs_mod_is_host(priv);
699 int ret;
700 u16 pipecfg, pipebuf;
701
702 pipe = usbhsp_get_pipe(priv, endpoint_type);
703 if (!pipe) {
704 dev_err(dev, "can't get pipe (%s)\n",
705 usbhsp_pipe_name[endpoint_type]);
706 return NULL;
707 }
708
709 INIT_LIST_HEAD(&pipe->list);
710
711 usbhs_pipe_disable(pipe);
712
713 /* make sure pipe is not busy */
714 ret = usbhsp_pipe_barrier(pipe);
715 if (ret < 0) {
716 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
717 return NULL;
718 }
719
720 if (usbhsp_setup_pipecfg(pipe, is_host, dir_in, &pipecfg)) {
721 dev_err(dev, "can't setup pipe\n");
722 return NULL;
723 }
724
725 pipebuf = usbhsp_setup_pipebuff(pipe);
726
727 usbhsp_pipe_select(pipe);
728 usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
729 usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
730 usbhs_pipe_clear(pipe);
731
732 usbhs_pipe_sequence_data0(pipe);
733
734 dev_dbg(dev, "enable pipe %d : %s (%s)\n",
735 usbhs_pipe_number(pipe),
736 usbhs_pipe_name(pipe),
737 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
738
739 /*
740 * epnum / maxp are still not set to this pipe.
741 * call usbhs_pipe_config_update() after this function !!
742 */
743
744 return pipe;
745}
746
747void usbhs_pipe_free(struct usbhs_pipe *pipe)
748{
749 usbhsp_pipe_select(pipe);
750 usbhsp_pipe_cfg_set(pipe, 0xFFFF, 0);
751 usbhsp_put_pipe(pipe);
752}
753
754void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
755{
756 if (pipe->fifo)
757 pipe->fifo->pipe = NULL;
758
759 pipe->fifo = fifo;
760
761 if (fifo)
762 fifo->pipe = pipe;
763}
764
765
766/*
767 * dcp control
768 */
769struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
770{
771 struct usbhs_pipe *pipe;
772
773 pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
774 if (!pipe)
775 return NULL;
776
777 INIT_LIST_HEAD(&pipe->list);
778
779 /*
780 * call usbhs_pipe_config_update() after this function !!
781 */
782
783 return pipe;
784}
785
786void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
787{
788 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
789
790 WARN_ON(!usbhs_pipe_is_dcp(pipe));
791
792 usbhs_pipe_enable(pipe);
793
794 if (!usbhs_mod_is_host(priv)) /* funconly */
795 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
796}
797
798void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
799{
800 usbhsp_pipe_cfg_set(pipe, DIR_OUT,
801 dir_out ? DIR_OUT : 0);
802}
803
804/*
805 * pipe module function
806 */
807int usbhs_pipe_probe(struct usbhs_priv *priv)
808{
809 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
810 struct usbhs_pipe *pipe;
811 struct device *dev = usbhs_priv_to_dev(priv);
812 struct renesas_usbhs_driver_pipe_config *pipe_configs =
813 usbhs_get_dparam(priv, pipe_configs);
814 int pipe_size = usbhs_get_dparam(priv, pipe_size);
815 int i;
816
817 /* This driver expects 1st pipe is DCP */
818 if (pipe_configs[0].type != USB_ENDPOINT_XFER_CONTROL) {
819 dev_err(dev, "1st PIPE is not DCP\n");
820 return -EINVAL;
821 }
822
823 info->pipe = kcalloc(pipe_size, sizeof(struct usbhs_pipe),
824 GFP_KERNEL);
825 if (!info->pipe)
826 return -ENOMEM;
827
828 info->size = pipe_size;
829
830 /*
831 * init pipe
832 */
833 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
834 pipe->priv = priv;
835
836 usbhs_pipe_type(pipe) =
837 pipe_configs[i].type & USB_ENDPOINT_XFERTYPE_MASK;
838
839 dev_dbg(dev, "pipe %x\t: %s\n",
840 i, usbhsp_pipe_name[pipe_configs[i].type]);
841 }
842
843 return 0;
844}
845
846void usbhs_pipe_remove(struct usbhs_priv *priv)
847{
848 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
849
850 kfree(info->pipe);
851}
1/*
2 * Renesas USB driver
3 *
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
15 *
16 */
17#include <linux/delay.h>
18#include <linux/slab.h>
19#include "common.h"
20#include "pipe.h"
21
22/*
23 * macros
24 */
25#define usbhsp_addr_offset(p) ((usbhs_pipe_number(p) - 1) * 2)
26
27#define usbhsp_flags_set(p, f) ((p)->flags |= USBHS_PIPE_FLAGS_##f)
28#define usbhsp_flags_clr(p, f) ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
29#define usbhsp_flags_has(p, f) ((p)->flags & USBHS_PIPE_FLAGS_##f)
30#define usbhsp_flags_init(p) do {(p)->flags = 0; } while (0)
31
32/*
33 * for debug
34 */
35static char *usbhsp_pipe_name[] = {
36 [USB_ENDPOINT_XFER_CONTROL] = "DCP",
37 [USB_ENDPOINT_XFER_BULK] = "BULK",
38 [USB_ENDPOINT_XFER_INT] = "INT",
39 [USB_ENDPOINT_XFER_ISOC] = "ISO",
40};
41
42char *usbhs_pipe_name(struct usbhs_pipe *pipe)
43{
44 return usbhsp_pipe_name[usbhs_pipe_type(pipe)];
45}
46
47static struct renesas_usbhs_driver_pipe_config
48*usbhsp_get_pipe_config(struct usbhs_priv *priv, int pipe_num)
49{
50 struct renesas_usbhs_driver_pipe_config *pipe_configs =
51 usbhs_get_dparam(priv, pipe_configs);
52
53 return &pipe_configs[pipe_num];
54}
55
56/*
57 * DCPCTR/PIPEnCTR functions
58 */
59static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
60{
61 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
62 int offset = usbhsp_addr_offset(pipe);
63
64 if (usbhs_pipe_is_dcp(pipe))
65 usbhs_bset(priv, DCPCTR, mask, val);
66 else
67 usbhs_bset(priv, PIPEnCTR + offset, mask, val);
68}
69
70static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
71{
72 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
73 int offset = usbhsp_addr_offset(pipe);
74
75 if (usbhs_pipe_is_dcp(pipe))
76 return usbhs_read(priv, DCPCTR);
77 else
78 return usbhs_read(priv, PIPEnCTR + offset);
79}
80
81/*
82 * DCP/PIPE functions
83 */
84static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
85 u16 dcp_reg, u16 pipe_reg,
86 u16 mask, u16 val)
87{
88 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
89
90 if (usbhs_pipe_is_dcp(pipe))
91 usbhs_bset(priv, dcp_reg, mask, val);
92 else
93 usbhs_bset(priv, pipe_reg, mask, val);
94}
95
96static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
97 u16 dcp_reg, u16 pipe_reg)
98{
99 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
100
101 if (usbhs_pipe_is_dcp(pipe))
102 return usbhs_read(priv, dcp_reg);
103 else
104 return usbhs_read(priv, pipe_reg);
105}
106
107/*
108 * DCPCFG/PIPECFG functions
109 */
110static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
111{
112 __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
113}
114
115static u16 usbhsp_pipe_cfg_get(struct usbhs_pipe *pipe)
116{
117 return __usbhsp_pipe_xxx_get(pipe, DCPCFG, PIPECFG);
118}
119
120/*
121 * PIPEnTRN/PIPEnTRE functions
122 */
123static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
124{
125 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
126 struct device *dev = usbhs_priv_to_dev(priv);
127 int num = usbhs_pipe_number(pipe);
128 u16 reg;
129
130 /*
131 * It is impossible to calculate address,
132 * since PIPEnTRN addresses were mapped randomly.
133 */
134#define CASE_PIPExTRN(a) \
135 case 0x ## a: \
136 reg = PIPE ## a ## TRN; \
137 break;
138
139 switch (num) {
140 CASE_PIPExTRN(1);
141 CASE_PIPExTRN(2);
142 CASE_PIPExTRN(3);
143 CASE_PIPExTRN(4);
144 CASE_PIPExTRN(5);
145 CASE_PIPExTRN(B);
146 CASE_PIPExTRN(C);
147 CASE_PIPExTRN(D);
148 CASE_PIPExTRN(E);
149 CASE_PIPExTRN(F);
150 CASE_PIPExTRN(9);
151 CASE_PIPExTRN(A);
152 default:
153 dev_err(dev, "unknown pipe (%d)\n", num);
154 return;
155 }
156 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
157}
158
159static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
160{
161 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
162 struct device *dev = usbhs_priv_to_dev(priv);
163 int num = usbhs_pipe_number(pipe);
164 u16 reg;
165
166 /*
167 * It is impossible to calculate address,
168 * since PIPEnTRE addresses were mapped randomly.
169 */
170#define CASE_PIPExTRE(a) \
171 case 0x ## a: \
172 reg = PIPE ## a ## TRE; \
173 break;
174
175 switch (num) {
176 CASE_PIPExTRE(1);
177 CASE_PIPExTRE(2);
178 CASE_PIPExTRE(3);
179 CASE_PIPExTRE(4);
180 CASE_PIPExTRE(5);
181 CASE_PIPExTRE(B);
182 CASE_PIPExTRE(C);
183 CASE_PIPExTRE(D);
184 CASE_PIPExTRE(E);
185 CASE_PIPExTRE(F);
186 CASE_PIPExTRE(9);
187 CASE_PIPExTRE(A);
188 default:
189 dev_err(dev, "unknown pipe (%d)\n", num);
190 return;
191 }
192
193 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
194}
195
196/*
197 * PIPEBUF
198 */
199static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
200{
201 if (usbhs_pipe_is_dcp(pipe))
202 return;
203
204 __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
205}
206
207/*
208 * DCPMAXP/PIPEMAXP
209 */
210static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
211{
212 __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
213}
214
215/*
216 * pipe control functions
217 */
218static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
219{
220 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
221
222 /*
223 * On pipe, this is necessary before
224 * accesses to below registers.
225 *
226 * PIPESEL : usbhsp_pipe_select
227 * PIPECFG : usbhsp_pipe_cfg_xxx
228 * PIPEBUF : usbhsp_pipe_buf_xxx
229 * PIPEMAXP : usbhsp_pipe_maxp_xxx
230 * PIPEPERI
231 */
232
233 /*
234 * if pipe is dcp, no pipe is selected.
235 * it is no problem, because dcp have its register
236 */
237 usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
238}
239
240static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
241{
242 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
243 int timeout = 1024;
244 u16 mask = usbhs_mod_is_host(priv) ? (CSSTS | PID_MASK) : PID_MASK;
245
246 /*
247 * make sure....
248 *
249 * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
250 * specified by the CURPIPE bits.
251 * When changing the setting of this bit after changing
252 * the PID bits for the selected pipe from BUF to NAK,
253 * check that CSSTS = 0 and PBUSY = 0.
254 */
255
256 /*
257 * CURPIPE bit = 0
258 *
259 * see also
260 * "Operation"
261 * - "Pipe Control"
262 * - "Pipe Control Registers Switching Procedure"
263 */
264 usbhs_write(priv, CFIFOSEL, 0);
265 usbhs_pipe_disable(pipe);
266
267 do {
268 if (!(usbhsp_pipectrl_get(pipe) & mask))
269 return 0;
270
271 udelay(10);
272
273 } while (timeout--);
274
275 return -EBUSY;
276}
277
278int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
279{
280 u16 val;
281
282 val = usbhsp_pipectrl_get(pipe);
283 if (val & BSTS)
284 return 0;
285
286 return -EBUSY;
287}
288
289/*
290 * PID ctrl
291 */
292static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
293{
294 u16 pid = usbhsp_pipectrl_get(pipe);
295
296 pid &= PID_MASK;
297
298 /*
299 * see
300 * "Pipe n Control Register" - "PID"
301 */
302 switch (pid) {
303 case PID_STALL11:
304 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
305 /* fall-through */
306 case PID_STALL10:
307 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
308 }
309}
310
311void usbhs_pipe_disable(struct usbhs_pipe *pipe)
312{
313 int timeout = 1024;
314 u16 val;
315
316 /* see "Pipe n Control Register" - "PID" */
317 __usbhsp_pid_try_nak_if_stall(pipe);
318
319 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
320
321 do {
322 val = usbhsp_pipectrl_get(pipe);
323 val &= PBUSY;
324 if (!val)
325 break;
326
327 udelay(10);
328 } while (timeout--);
329}
330
331void usbhs_pipe_enable(struct usbhs_pipe *pipe)
332{
333 /* see "Pipe n Control Register" - "PID" */
334 __usbhsp_pid_try_nak_if_stall(pipe);
335
336 usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
337}
338
339void usbhs_pipe_stall(struct usbhs_pipe *pipe)
340{
341 u16 pid = usbhsp_pipectrl_get(pipe);
342
343 pid &= PID_MASK;
344
345 /*
346 * see
347 * "Pipe n Control Register" - "PID"
348 */
349 switch (pid) {
350 case PID_NAK:
351 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
352 break;
353 case PID_BUF:
354 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
355 break;
356 }
357}
358
359int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
360{
361 u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
362
363 return (int)(pid == PID_STALL10 || pid == PID_STALL11);
364}
365
366void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
367{
368 if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
369 return;
370
371 /*
372 * clear and disable transfer counter for IN/OUT pipe
373 */
374 usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
375
376 /*
377 * Only IN direction bulk pipe can use transfer count.
378 * Without using this function,
379 * received data will break if it was large data size.
380 * see PIPEnTRN/PIPEnTRE for detail
381 */
382 if (usbhs_pipe_is_dir_in(pipe)) {
383 int maxp = usbhs_pipe_get_maxpacket(pipe);
384
385 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
386 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
387 }
388}
389
390
391/*
392 * pipe setup
393 */
394static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
395 int is_host,
396 int dir_in)
397{
398 u16 type = 0;
399 u16 bfre = 0;
400 u16 dblb = 0;
401 u16 cntmd = 0;
402 u16 dir = 0;
403 u16 epnum = 0;
404 u16 shtnak = 0;
405 u16 type_array[] = {
406 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
407 [USB_ENDPOINT_XFER_INT] = TYPE_INT,
408 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
409 };
410
411 if (usbhs_pipe_is_dcp(pipe))
412 return -EINVAL;
413
414 /*
415 * PIPECFG
416 *
417 * see
418 * - "Register Descriptions" - "PIPECFG" register
419 * - "Features" - "Pipe configuration"
420 * - "Operation" - "Pipe Control"
421 */
422
423 /* TYPE */
424 type = type_array[usbhs_pipe_type(pipe)];
425
426 /* BFRE */
427 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
428 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
429 bfre = 0; /* FIXME */
430
431 /* DBLB: see usbhs_pipe_config_update() */
432
433 /* CNTMD */
434 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
435 cntmd = 0; /* FIXME */
436
437 /* DIR */
438 if (dir_in)
439 usbhsp_flags_set(pipe, IS_DIR_HOST);
440
441 if (!!is_host ^ !!dir_in)
442 dir |= DIR_OUT;
443
444 if (!dir)
445 usbhsp_flags_set(pipe, IS_DIR_IN);
446
447 /* SHTNAK */
448 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
449 !dir)
450 shtnak = SHTNAK;
451
452 /* EPNUM */
453 epnum = 0; /* see usbhs_pipe_config_update() */
454
455 return type |
456 bfre |
457 dblb |
458 cntmd |
459 dir |
460 shtnak |
461 epnum;
462}
463
464static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
465{
466 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
467 struct device *dev = usbhs_priv_to_dev(priv);
468 int pipe_num = usbhs_pipe_number(pipe);
469 u16 buff_size;
470 u16 bufnmb;
471 u16 bufnmb_cnt;
472 struct renesas_usbhs_driver_pipe_config *pipe_config =
473 usbhsp_get_pipe_config(priv, pipe_num);
474
475 /*
476 * PIPEBUF
477 *
478 * see
479 * - "Register Descriptions" - "PIPEBUF" register
480 * - "Features" - "Pipe configuration"
481 * - "Operation" - "FIFO Buffer Memory"
482 * - "Operation" - "Pipe Control"
483 */
484 buff_size = pipe_config->bufsize;
485 bufnmb = pipe_config->bufnum;
486
487 /* change buff_size to register value */
488 bufnmb_cnt = (buff_size / 64) - 1;
489
490 dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
491 pipe_num, buff_size, bufnmb);
492
493 return (0x1f & bufnmb_cnt) << 10 |
494 (0xff & bufnmb) << 0;
495}
496
497void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
498 u16 epnum, u16 maxp)
499{
500 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
501 int pipe_num = usbhs_pipe_number(pipe);
502 struct renesas_usbhs_driver_pipe_config *pipe_config =
503 usbhsp_get_pipe_config(priv, pipe_num);
504 u16 dblb = pipe_config->double_buf ? DBLB : 0;
505
506 if (devsel > 0xA) {
507 struct device *dev = usbhs_priv_to_dev(priv);
508
509 dev_err(dev, "devsel error %d\n", devsel);
510
511 devsel = 0;
512 }
513
514 usbhsp_pipe_barrier(pipe);
515
516 pipe->maxp = maxp;
517
518 usbhsp_pipe_select(pipe);
519 usbhsp_pipe_maxp_set(pipe, 0xFFFF,
520 (devsel << 12) |
521 maxp);
522
523 if (!usbhs_pipe_is_dcp(pipe))
524 usbhsp_pipe_cfg_set(pipe, 0x000F | DBLB, epnum | dblb);
525}
526
527/*
528 * pipe control
529 */
530int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
531{
532 /*
533 * see
534 * usbhs_pipe_config_update()
535 * usbhs_dcp_malloc()
536 */
537 return pipe->maxp;
538}
539
540int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
541{
542 return usbhsp_flags_has(pipe, IS_DIR_IN);
543}
544
545int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
546{
547 return usbhsp_flags_has(pipe, IS_DIR_HOST);
548}
549
550int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
551{
552 return usbhsp_flags_has(pipe, IS_RUNNING);
553}
554
555void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
556{
557 if (running)
558 usbhsp_flags_set(pipe, IS_RUNNING);
559 else
560 usbhsp_flags_clr(pipe, IS_RUNNING);
561}
562
563void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
564{
565 u16 mask = (SQCLR | SQSET);
566 u16 val;
567
568 /*
569 * sequence
570 * 0 : data0
571 * 1 : data1
572 * -1 : no change
573 */
574 switch (sequence) {
575 case 0:
576 val = SQCLR;
577 break;
578 case 1:
579 val = SQSET;
580 break;
581 default:
582 return;
583 }
584
585 usbhsp_pipectrl_set(pipe, mask, val);
586}
587
588static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
589{
590 return !!(usbhsp_pipectrl_get(pipe) & SQMON);
591}
592
593void usbhs_pipe_clear(struct usbhs_pipe *pipe)
594{
595 if (usbhs_pipe_is_dcp(pipe)) {
596 usbhs_fifo_clear_dcp(pipe);
597 } else {
598 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
599 usbhsp_pipectrl_set(pipe, ACLRM, 0);
600 }
601}
602
603void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
604{
605 int sequence;
606
607 if (usbhs_pipe_is_dcp(pipe))
608 return;
609
610 usbhsp_pipe_select(pipe);
611 /* check if the driver needs to change the BFRE value */
612 if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
613 return;
614
615 sequence = usbhs_pipe_get_data_sequence(pipe);
616 usbhsp_pipe_cfg_set(pipe, BFRE, enable ? BFRE : 0);
617 usbhs_pipe_clear(pipe);
618 usbhs_pipe_data_sequence(pipe, sequence);
619}
620
621static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
622{
623 struct usbhs_pipe *pos, *pipe;
624 int i;
625
626 /*
627 * find target pipe
628 */
629 pipe = NULL;
630 usbhs_for_each_pipe_with_dcp(pos, priv, i) {
631 if (!usbhs_pipe_type_is(pos, type))
632 continue;
633 if (usbhsp_flags_has(pos, IS_USED))
634 continue;
635
636 pipe = pos;
637 break;
638 }
639
640 if (!pipe)
641 return NULL;
642
643 /*
644 * initialize pipe flags
645 */
646 usbhsp_flags_init(pipe);
647 usbhsp_flags_set(pipe, IS_USED);
648
649 return pipe;
650}
651
652static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
653{
654 usbhsp_flags_init(pipe);
655}
656
657void usbhs_pipe_init(struct usbhs_priv *priv,
658 int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map))
659{
660 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
661 struct usbhs_pipe *pipe;
662 int i;
663
664 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
665 usbhsp_flags_init(pipe);
666 pipe->fifo = NULL;
667 pipe->mod_private = NULL;
668 INIT_LIST_HEAD(&pipe->list);
669
670 /* pipe force init */
671 usbhs_pipe_clear(pipe);
672 }
673
674 info->dma_map_ctrl = dma_map_ctrl;
675}
676
677struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
678 int endpoint_type,
679 int dir_in)
680{
681 struct device *dev = usbhs_priv_to_dev(priv);
682 struct usbhs_pipe *pipe;
683 int is_host = usbhs_mod_is_host(priv);
684 int ret;
685 u16 pipecfg, pipebuf;
686
687 pipe = usbhsp_get_pipe(priv, endpoint_type);
688 if (!pipe) {
689 dev_err(dev, "can't get pipe (%s)\n",
690 usbhsp_pipe_name[endpoint_type]);
691 return NULL;
692 }
693
694 INIT_LIST_HEAD(&pipe->list);
695
696 usbhs_pipe_disable(pipe);
697
698 /* make sure pipe is not busy */
699 ret = usbhsp_pipe_barrier(pipe);
700 if (ret < 0) {
701 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
702 return NULL;
703 }
704
705 pipecfg = usbhsp_setup_pipecfg(pipe, is_host, dir_in);
706 pipebuf = usbhsp_setup_pipebuff(pipe);
707
708 usbhsp_pipe_select(pipe);
709 usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
710 usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
711 usbhs_pipe_clear(pipe);
712
713 usbhs_pipe_sequence_data0(pipe);
714
715 dev_dbg(dev, "enable pipe %d : %s (%s)\n",
716 usbhs_pipe_number(pipe),
717 usbhs_pipe_name(pipe),
718 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
719
720 /*
721 * epnum / maxp are still not set to this pipe.
722 * call usbhs_pipe_config_update() after this function !!
723 */
724
725 return pipe;
726}
727
728void usbhs_pipe_free(struct usbhs_pipe *pipe)
729{
730 usbhsp_put_pipe(pipe);
731}
732
733void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
734{
735 if (pipe->fifo)
736 pipe->fifo->pipe = NULL;
737
738 pipe->fifo = fifo;
739
740 if (fifo)
741 fifo->pipe = pipe;
742}
743
744
745/*
746 * dcp control
747 */
748struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
749{
750 struct usbhs_pipe *pipe;
751
752 pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
753 if (!pipe)
754 return NULL;
755
756 INIT_LIST_HEAD(&pipe->list);
757
758 /*
759 * call usbhs_pipe_config_update() after this function !!
760 */
761
762 return pipe;
763}
764
765void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
766{
767 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
768
769 WARN_ON(!usbhs_pipe_is_dcp(pipe));
770
771 usbhs_pipe_enable(pipe);
772
773 if (!usbhs_mod_is_host(priv)) /* funconly */
774 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
775}
776
777void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
778{
779 usbhsp_pipe_cfg_set(pipe, DIR_OUT,
780 dir_out ? DIR_OUT : 0);
781}
782
783/*
784 * pipe module function
785 */
786int usbhs_pipe_probe(struct usbhs_priv *priv)
787{
788 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
789 struct usbhs_pipe *pipe;
790 struct device *dev = usbhs_priv_to_dev(priv);
791 struct renesas_usbhs_driver_pipe_config *pipe_configs =
792 usbhs_get_dparam(priv, pipe_configs);
793 int pipe_size = usbhs_get_dparam(priv, pipe_size);
794 int i;
795
796 /* This driver expects 1st pipe is DCP */
797 if (pipe_configs[0].type != USB_ENDPOINT_XFER_CONTROL) {
798 dev_err(dev, "1st PIPE is not DCP\n");
799 return -EINVAL;
800 }
801
802 info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
803 if (!info->pipe) {
804 dev_err(dev, "Could not allocate pipe\n");
805 return -ENOMEM;
806 }
807
808 info->size = pipe_size;
809
810 /*
811 * init pipe
812 */
813 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
814 pipe->priv = priv;
815
816 usbhs_pipe_type(pipe) =
817 pipe_configs[i].type & USB_ENDPOINT_XFERTYPE_MASK;
818
819 dev_dbg(dev, "pipe %x\t: %s\n",
820 i, usbhsp_pipe_name[pipe_configs[i].type]);
821 }
822
823 return 0;
824}
825
826void usbhs_pipe_remove(struct usbhs_priv *priv)
827{
828 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
829
830 kfree(info->pipe);
831}