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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
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
87/*
88 * DCPCFG/PIPECFG functions
89 */
90static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
91{
92 __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
93}
94
95/*
96 * PIPEnTRN/PIPEnTRE functions
97 */
98static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
99{
100 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
101 struct device *dev = usbhs_priv_to_dev(priv);
102 int num = usbhs_pipe_number(pipe);
103 u16 reg;
104
105 /*
106 * It is impossible to calculate address,
107 * since PIPEnTRN addresses were mapped randomly.
108 */
109#define CASE_PIPExTRN(a) \
110 case 0x ## a: \
111 reg = PIPE ## a ## TRN; \
112 break;
113
114 switch (num) {
115 CASE_PIPExTRN(1);
116 CASE_PIPExTRN(2);
117 CASE_PIPExTRN(3);
118 CASE_PIPExTRN(4);
119 CASE_PIPExTRN(5);
120 CASE_PIPExTRN(B);
121 CASE_PIPExTRN(C);
122 CASE_PIPExTRN(D);
123 CASE_PIPExTRN(E);
124 CASE_PIPExTRN(F);
125 CASE_PIPExTRN(9);
126 CASE_PIPExTRN(A);
127 default:
128 dev_err(dev, "unknown pipe (%d)\n", num);
129 return;
130 }
131 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
132}
133
134static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
135{
136 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
137 struct device *dev = usbhs_priv_to_dev(priv);
138 int num = usbhs_pipe_number(pipe);
139 u16 reg;
140
141 /*
142 * It is impossible to calculate address,
143 * since PIPEnTRE addresses were mapped randomly.
144 */
145#define CASE_PIPExTRE(a) \
146 case 0x ## a: \
147 reg = PIPE ## a ## TRE; \
148 break;
149
150 switch (num) {
151 CASE_PIPExTRE(1);
152 CASE_PIPExTRE(2);
153 CASE_PIPExTRE(3);
154 CASE_PIPExTRE(4);
155 CASE_PIPExTRE(5);
156 CASE_PIPExTRE(B);
157 CASE_PIPExTRE(C);
158 CASE_PIPExTRE(D);
159 CASE_PIPExTRE(E);
160 CASE_PIPExTRE(F);
161 CASE_PIPExTRE(9);
162 CASE_PIPExTRE(A);
163 default:
164 dev_err(dev, "unknown pipe (%d)\n", num);
165 return;
166 }
167
168 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
169}
170
171/*
172 * PIPEBUF
173 */
174static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
175{
176 if (usbhs_pipe_is_dcp(pipe))
177 return;
178
179 __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
180}
181
182/*
183 * DCPMAXP/PIPEMAXP
184 */
185static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
186{
187 __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
188}
189
190/*
191 * pipe control functions
192 */
193static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
194{
195 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
196
197 /*
198 * On pipe, this is necessary before
199 * accesses to below registers.
200 *
201 * PIPESEL : usbhsp_pipe_select
202 * PIPECFG : usbhsp_pipe_cfg_xxx
203 * PIPEBUF : usbhsp_pipe_buf_xxx
204 * PIPEMAXP : usbhsp_pipe_maxp_xxx
205 * PIPEPERI
206 */
207
208 /*
209 * if pipe is dcp, no pipe is selected.
210 * it is no problem, because dcp have its register
211 */
212 usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
213}
214
215static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
216{
217 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
218 int timeout = 1024;
219 u16 val;
220
221 /*
222 * make sure....
223 *
224 * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
225 * specified by the CURPIPE bits.
226 * When changing the setting of this bit after changing
227 * the PID bits for the selected pipe from BUF to NAK,
228 * check that CSSTS = 0 and PBUSY = 0.
229 */
230
231 /*
232 * CURPIPE bit = 0
233 *
234 * see also
235 * "Operation"
236 * - "Pipe Control"
237 * - "Pipe Control Registers Switching Procedure"
238 */
239 usbhs_write(priv, CFIFOSEL, 0);
240 usbhs_pipe_disable(pipe);
241
242 do {
243 val = usbhsp_pipectrl_get(pipe);
244 val &= CSSTS | PID_MASK;
245 if (!val)
246 return 0;
247
248 udelay(10);
249
250 } while (timeout--);
251
252 return -EBUSY;
253}
254
255int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
256{
257 u16 val;
258
259 val = usbhsp_pipectrl_get(pipe);
260 if (val & BSTS)
261 return 0;
262
263 return -EBUSY;
264}
265
266/*
267 * PID ctrl
268 */
269static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
270{
271 u16 pid = usbhsp_pipectrl_get(pipe);
272
273 pid &= PID_MASK;
274
275 /*
276 * see
277 * "Pipe n Control Register" - "PID"
278 */
279 switch (pid) {
280 case PID_STALL11:
281 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
282 /* fall-through */
283 case PID_STALL10:
284 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
285 }
286}
287
288void usbhs_pipe_disable(struct usbhs_pipe *pipe)
289{
290 int timeout = 1024;
291 u16 val;
292
293 /* see "Pipe n Control Register" - "PID" */
294 __usbhsp_pid_try_nak_if_stall(pipe);
295
296 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
297
298 do {
299 val = usbhsp_pipectrl_get(pipe);
300 val &= PBUSY;
301 if (!val)
302 break;
303
304 udelay(10);
305 } while (timeout--);
306}
307
308void usbhs_pipe_enable(struct usbhs_pipe *pipe)
309{
310 /* see "Pipe n Control Register" - "PID" */
311 __usbhsp_pid_try_nak_if_stall(pipe);
312
313 usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
314}
315
316void usbhs_pipe_stall(struct usbhs_pipe *pipe)
317{
318 u16 pid = usbhsp_pipectrl_get(pipe);
319
320 pid &= PID_MASK;
321
322 /*
323 * see
324 * "Pipe n Control Register" - "PID"
325 */
326 switch (pid) {
327 case PID_NAK:
328 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
329 break;
330 case PID_BUF:
331 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
332 break;
333 }
334}
335
336int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
337{
338 u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
339
340 return (int)(pid == PID_STALL10 || pid == PID_STALL11);
341}
342
343void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
344{
345 if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
346 return;
347
348 /*
349 * clear and disable transfer counter for IN/OUT pipe
350 */
351 usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
352
353 /*
354 * Only IN direction bulk pipe can use transfer count.
355 * Without using this function,
356 * received data will break if it was large data size.
357 * see PIPEnTRN/PIPEnTRE for detail
358 */
359 if (usbhs_pipe_is_dir_in(pipe)) {
360 int maxp = usbhs_pipe_get_maxpacket(pipe);
361
362 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
363 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
364 }
365}
366
367
368/*
369 * pipe setup
370 */
371static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
372{
373 /*
374 * only ISO / BULK pipe can use double buffer
375 */
376 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
377 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
378 return 1;
379
380 return 0;
381}
382
383static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
384 int is_host,
385 int dir_in)
386{
387 u16 type = 0;
388 u16 bfre = 0;
389 u16 dblb = 0;
390 u16 cntmd = 0;
391 u16 dir = 0;
392 u16 epnum = 0;
393 u16 shtnak = 0;
394 u16 type_array[] = {
395 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
396 [USB_ENDPOINT_XFER_INT] = TYPE_INT,
397 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
398 };
399 int is_double = usbhsp_possible_double_buffer(pipe);
400
401 if (usbhs_pipe_is_dcp(pipe))
402 return -EINVAL;
403
404 /*
405 * PIPECFG
406 *
407 * see
408 * - "Register Descriptions" - "PIPECFG" register
409 * - "Features" - "Pipe configuration"
410 * - "Operation" - "Pipe Control"
411 */
412
413 /* TYPE */
414 type = type_array[usbhs_pipe_type(pipe)];
415
416 /* BFRE */
417 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
418 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
419 bfre = 0; /* FIXME */
420
421 /* DBLB */
422 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
423 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
424 dblb = (is_double) ? DBLB : 0;
425
426 /* CNTMD */
427 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
428 cntmd = 0; /* FIXME */
429
430 /* DIR */
431 if (dir_in)
432 usbhsp_flags_set(pipe, IS_DIR_HOST);
433
434 if (!!is_host ^ !!dir_in)
435 dir |= DIR_OUT;
436
437 if (!dir)
438 usbhsp_flags_set(pipe, IS_DIR_IN);
439
440 /* SHTNAK */
441 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
442 !dir)
443 shtnak = SHTNAK;
444
445 /* EPNUM */
446 epnum = 0; /* see usbhs_pipe_config_update() */
447
448 return type |
449 bfre |
450 dblb |
451 cntmd |
452 dir |
453 shtnak |
454 epnum;
455}
456
457static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
458{
459 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
460 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
461 struct device *dev = usbhs_priv_to_dev(priv);
462 int pipe_num = usbhs_pipe_number(pipe);
463 int is_double = usbhsp_possible_double_buffer(pipe);
464 u16 buff_size;
465 u16 bufnmb;
466 u16 bufnmb_cnt;
467
468 /*
469 * PIPEBUF
470 *
471 * see
472 * - "Register Descriptions" - "PIPEBUF" register
473 * - "Features" - "Pipe configuration"
474 * - "Operation" - "FIFO Buffer Memory"
475 * - "Operation" - "Pipe Control"
476 *
477 * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
478 *
479 * BUFNMB: PIPE
480 * 0: pipe0 (DCP 256byte)
481 * 1: -
482 * 2: -
483 * 3: -
484 * 4: pipe6 (INT 64byte)
485 * 5: pipe7 (INT 64byte)
486 * 6: pipe8 (INT 64byte)
487 * 7: pipe9 (INT 64byte)
488 * 8 - xx: free (for BULK, ISOC)
489 */
490
491 /*
492 * FIXME
493 *
494 * it doesn't have good buffer allocator
495 *
496 * DCP : 256 byte
497 * BULK: 512 byte
498 * INT : 64 byte
499 * ISOC: 512 byte
500 */
501 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
502 buff_size = 256;
503 else if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))
504 buff_size = 64;
505 else
506 buff_size = 512;
507
508 /* change buff_size to register value */
509 bufnmb_cnt = (buff_size / 64) - 1;
510
511 /* BUFNMB has been reserved for INT pipe
512 * see above */
513 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT)) {
514 bufnmb = pipe_num - 2;
515 } else {
516 bufnmb = info->bufnmb_last;
517 info->bufnmb_last += bufnmb_cnt + 1;
518
519 /*
520 * double buffer
521 */
522 if (is_double)
523 info->bufnmb_last += bufnmb_cnt + 1;
524 }
525
526 dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
527 pipe_num, buff_size, bufnmb);
528
529 return (0x1f & bufnmb_cnt) << 10 |
530 (0xff & bufnmb) << 0;
531}
532
533void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
534 u16 epnum, u16 maxp)
535{
536 if (devsel > 0xA) {
537 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
538 struct device *dev = usbhs_priv_to_dev(priv);
539
540 dev_err(dev, "devsel error %d\n", devsel);
541
542 devsel = 0;
543 }
544
545 usbhsp_pipe_barrier(pipe);
546
547 pipe->maxp = maxp;
548
549 usbhsp_pipe_select(pipe);
550 usbhsp_pipe_maxp_set(pipe, 0xFFFF,
551 (devsel << 12) |
552 maxp);
553
554 if (!usbhs_pipe_is_dcp(pipe))
555 usbhsp_pipe_cfg_set(pipe, 0x000F, epnum);
556}
557
558/*
559 * pipe control
560 */
561int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
562{
563 /*
564 * see
565 * usbhs_pipe_config_update()
566 * usbhs_dcp_malloc()
567 */
568 return pipe->maxp;
569}
570
571int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
572{
573 return usbhsp_flags_has(pipe, IS_DIR_IN);
574}
575
576int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
577{
578 return usbhsp_flags_has(pipe, IS_DIR_HOST);
579}
580
581void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
582{
583 u16 mask = (SQCLR | SQSET);
584 u16 val;
585
586 /*
587 * sequence
588 * 0 : data0
589 * 1 : data1
590 * -1 : no change
591 */
592 switch (sequence) {
593 case 0:
594 val = SQCLR;
595 break;
596 case 1:
597 val = SQSET;
598 break;
599 default:
600 return;
601 }
602
603 usbhsp_pipectrl_set(pipe, mask, val);
604}
605
606void usbhs_pipe_clear(struct usbhs_pipe *pipe)
607{
608 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
609 usbhsp_pipectrl_set(pipe, ACLRM, 0);
610}
611
612static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
613{
614 struct usbhs_pipe *pos, *pipe;
615 int i;
616
617 /*
618 * find target pipe
619 */
620 pipe = NULL;
621 usbhs_for_each_pipe_with_dcp(pos, priv, i) {
622 if (!usbhs_pipe_type_is(pos, type))
623 continue;
624 if (usbhsp_flags_has(pos, IS_USED))
625 continue;
626
627 pipe = pos;
628 break;
629 }
630
631 if (!pipe)
632 return NULL;
633
634 /*
635 * initialize pipe flags
636 */
637 usbhsp_flags_init(pipe);
638 usbhsp_flags_set(pipe, IS_USED);
639
640 return pipe;
641}
642
643void usbhs_pipe_init(struct usbhs_priv *priv,
644 int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map))
645{
646 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
647 struct usbhs_pipe *pipe;
648 int i;
649
650 /*
651 * FIXME
652 *
653 * driver needs good allocator.
654 *
655 * find first free buffer area (BULK, ISOC)
656 * (DCP, INT area is fixed)
657 *
658 * buffer number 0 - 3 have been reserved for DCP
659 * see
660 * usbhsp_to_bufnmb
661 */
662 info->bufnmb_last = 4;
663 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
664 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))
665 info->bufnmb_last++;
666
667 usbhsp_flags_init(pipe);
668 pipe->fifo = NULL;
669 pipe->mod_private = NULL;
670 INIT_LIST_HEAD(&pipe->list);
671
672 /* pipe force init */
673 usbhs_pipe_clear(pipe);
674 }
675
676 info->dma_map_ctrl = dma_map_ctrl;
677}
678
679struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
680 int endpoint_type,
681 int dir_in)
682{
683 struct device *dev = usbhs_priv_to_dev(priv);
684 struct usbhs_pipe *pipe;
685 int is_host = usbhs_mod_is_host(priv);
686 int ret;
687 u16 pipecfg, pipebuf;
688
689 pipe = usbhsp_get_pipe(priv, endpoint_type);
690 if (!pipe) {
691 dev_err(dev, "can't get pipe (%s)\n",
692 usbhsp_pipe_name[endpoint_type]);
693 return NULL;
694 }
695
696 INIT_LIST_HEAD(&pipe->list);
697
698 usbhs_pipe_disable(pipe);
699
700 /* make sure pipe is not busy */
701 ret = usbhsp_pipe_barrier(pipe);
702 if (ret < 0) {
703 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
704 return NULL;
705 }
706
707 pipecfg = usbhsp_setup_pipecfg(pipe, is_host, dir_in);
708 pipebuf = usbhsp_setup_pipebuff(pipe);
709
710 usbhsp_pipe_select(pipe);
711 usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
712 usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
713
714 usbhs_pipe_sequence_data0(pipe);
715
716 dev_dbg(dev, "enable pipe %d : %s (%s)\n",
717 usbhs_pipe_number(pipe),
718 usbhs_pipe_name(pipe),
719 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
720
721 /*
722 * epnum / maxp are still not set to this pipe.
723 * call usbhs_pipe_config_update() after this function !!
724 */
725
726 return pipe;
727}
728
729void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
730{
731 if (pipe->fifo)
732 pipe->fifo->pipe = NULL;
733
734 pipe->fifo = fifo;
735
736 if (fifo)
737 fifo->pipe = pipe;
738}
739
740
741/*
742 * dcp control
743 */
744struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
745{
746 struct usbhs_pipe *pipe;
747
748 pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
749 if (!pipe)
750 return NULL;
751
752 INIT_LIST_HEAD(&pipe->list);
753
754 /*
755 * call usbhs_pipe_config_update() after this function !!
756 */
757
758 return pipe;
759}
760
761void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
762{
763 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
764
765 WARN_ON(!usbhs_pipe_is_dcp(pipe));
766
767 usbhs_pipe_enable(pipe);
768
769 if (!usbhs_mod_is_host(priv)) /* funconly */
770 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
771}
772
773void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
774{
775 usbhsp_pipe_cfg_set(pipe, DIR_OUT,
776 dir_out ? DIR_OUT : 0);
777}
778
779/*
780 * pipe module function
781 */
782int usbhs_pipe_probe(struct usbhs_priv *priv)
783{
784 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
785 struct usbhs_pipe *pipe;
786 struct device *dev = usbhs_priv_to_dev(priv);
787 u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
788 int pipe_size = usbhs_get_dparam(priv, pipe_size);
789 int i;
790
791 /* This driver expects 1st pipe is DCP */
792 if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
793 dev_err(dev, "1st PIPE is not DCP\n");
794 return -EINVAL;
795 }
796
797 info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
798 if (!info->pipe) {
799 dev_err(dev, "Could not allocate pipe\n");
800 return -ENOMEM;
801 }
802
803 info->size = pipe_size;
804
805 /*
806 * init pipe
807 */
808 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
809 pipe->priv = priv;
810
811 usbhs_pipe_type(pipe) =
812 pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;
813
814 dev_dbg(dev, "pipe %x\t: %s\n",
815 i, usbhsp_pipe_name[pipe_type[i]]);
816 }
817
818 return 0;
819}
820
821void usbhs_pipe_remove(struct usbhs_priv *priv)
822{
823 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
824
825 kfree(info->pipe);
826}
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}