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Merge tag 'usb-for-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi...
[deliverable/linux.git] / drivers / usb / renesas_usbhs / pipe.c
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 */
35 static 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
42 char *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 */
50 static 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
61 static 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 */
75 static 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 */
90 static 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 */
98 static 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
134 static 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 */
174 static 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 */
185 static 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 */
193 static 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
215 static 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
255 int 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 */
269 static 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
288 void 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
308 void 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
316 void 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
336 int 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
343 void 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 */
371 static 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
383 static 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
457 static 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
533 void 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 */
561 int 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
571 int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
572 {
573 return usbhsp_flags_has(pipe, IS_DIR_IN);
574 }
575
576 int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
577 {
578 return usbhsp_flags_has(pipe, IS_DIR_HOST);
579 }
580
581 int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
582 {
583 return usbhsp_flags_has(pipe, IS_RUNNING);
584 }
585
586 void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
587 {
588 if (running)
589 usbhsp_flags_set(pipe, IS_RUNNING);
590 else
591 usbhsp_flags_clr(pipe, IS_RUNNING);
592 }
593
594 void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
595 {
596 u16 mask = (SQCLR | SQSET);
597 u16 val;
598
599 /*
600 * sequence
601 * 0 : data0
602 * 1 : data1
603 * -1 : no change
604 */
605 switch (sequence) {
606 case 0:
607 val = SQCLR;
608 break;
609 case 1:
610 val = SQSET;
611 break;
612 default:
613 return;
614 }
615
616 usbhsp_pipectrl_set(pipe, mask, val);
617 }
618
619 void usbhs_pipe_clear(struct usbhs_pipe *pipe)
620 {
621 if (usbhs_pipe_is_dcp(pipe)) {
622 usbhs_fifo_clear_dcp(pipe);
623 } else {
624 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
625 usbhsp_pipectrl_set(pipe, ACLRM, 0);
626 }
627 }
628
629 static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
630 {
631 struct usbhs_pipe *pos, *pipe;
632 int i;
633
634 /*
635 * find target pipe
636 */
637 pipe = NULL;
638 usbhs_for_each_pipe_with_dcp(pos, priv, i) {
639 if (!usbhs_pipe_type_is(pos, type))
640 continue;
641 if (usbhsp_flags_has(pos, IS_USED))
642 continue;
643
644 pipe = pos;
645 break;
646 }
647
648 if (!pipe)
649 return NULL;
650
651 /*
652 * initialize pipe flags
653 */
654 usbhsp_flags_init(pipe);
655 usbhsp_flags_set(pipe, IS_USED);
656
657 return pipe;
658 }
659
660 static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
661 {
662 usbhsp_flags_init(pipe);
663 }
664
665 void usbhs_pipe_init(struct usbhs_priv *priv,
666 int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map))
667 {
668 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
669 struct usbhs_pipe *pipe;
670 int i;
671
672 /*
673 * FIXME
674 *
675 * driver needs good allocator.
676 *
677 * find first free buffer area (BULK, ISOC)
678 * (DCP, INT area is fixed)
679 *
680 * buffer number 0 - 3 have been reserved for DCP
681 * see
682 * usbhsp_to_bufnmb
683 */
684 info->bufnmb_last = 4;
685 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
686 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))
687 info->bufnmb_last++;
688
689 usbhsp_flags_init(pipe);
690 pipe->fifo = NULL;
691 pipe->mod_private = NULL;
692 INIT_LIST_HEAD(&pipe->list);
693
694 /* pipe force init */
695 usbhs_pipe_clear(pipe);
696 }
697
698 info->dma_map_ctrl = dma_map_ctrl;
699 }
700
701 struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
702 int endpoint_type,
703 int dir_in)
704 {
705 struct device *dev = usbhs_priv_to_dev(priv);
706 struct usbhs_pipe *pipe;
707 int is_host = usbhs_mod_is_host(priv);
708 int ret;
709 u16 pipecfg, pipebuf;
710
711 pipe = usbhsp_get_pipe(priv, endpoint_type);
712 if (!pipe) {
713 dev_err(dev, "can't get pipe (%s)\n",
714 usbhsp_pipe_name[endpoint_type]);
715 return NULL;
716 }
717
718 INIT_LIST_HEAD(&pipe->list);
719
720 usbhs_pipe_disable(pipe);
721
722 /* make sure pipe is not busy */
723 ret = usbhsp_pipe_barrier(pipe);
724 if (ret < 0) {
725 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
726 return NULL;
727 }
728
729 pipecfg = usbhsp_setup_pipecfg(pipe, is_host, dir_in);
730 pipebuf = usbhsp_setup_pipebuff(pipe);
731
732 usbhsp_pipe_select(pipe);
733 usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
734 usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
735 usbhs_pipe_clear(pipe);
736
737 usbhs_pipe_sequence_data0(pipe);
738
739 dev_dbg(dev, "enable pipe %d : %s (%s)\n",
740 usbhs_pipe_number(pipe),
741 usbhs_pipe_name(pipe),
742 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
743
744 /*
745 * epnum / maxp are still not set to this pipe.
746 * call usbhs_pipe_config_update() after this function !!
747 */
748
749 return pipe;
750 }
751
752 void usbhs_pipe_free(struct usbhs_pipe *pipe)
753 {
754 usbhsp_put_pipe(pipe);
755 }
756
757 void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
758 {
759 if (pipe->fifo)
760 pipe->fifo->pipe = NULL;
761
762 pipe->fifo = fifo;
763
764 if (fifo)
765 fifo->pipe = pipe;
766 }
767
768
769 /*
770 * dcp control
771 */
772 struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
773 {
774 struct usbhs_pipe *pipe;
775
776 pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
777 if (!pipe)
778 return NULL;
779
780 INIT_LIST_HEAD(&pipe->list);
781
782 /*
783 * call usbhs_pipe_config_update() after this function !!
784 */
785
786 return pipe;
787 }
788
789 void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
790 {
791 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
792
793 WARN_ON(!usbhs_pipe_is_dcp(pipe));
794
795 usbhs_pipe_enable(pipe);
796
797 if (!usbhs_mod_is_host(priv)) /* funconly */
798 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
799 }
800
801 void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
802 {
803 usbhsp_pipe_cfg_set(pipe, DIR_OUT,
804 dir_out ? DIR_OUT : 0);
805 }
806
807 /*
808 * pipe module function
809 */
810 int usbhs_pipe_probe(struct usbhs_priv *priv)
811 {
812 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
813 struct usbhs_pipe *pipe;
814 struct device *dev = usbhs_priv_to_dev(priv);
815 u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
816 int pipe_size = usbhs_get_dparam(priv, pipe_size);
817 int i;
818
819 /* This driver expects 1st pipe is DCP */
820 if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
821 dev_err(dev, "1st PIPE is not DCP\n");
822 return -EINVAL;
823 }
824
825 info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
826 if (!info->pipe) {
827 dev_err(dev, "Could not allocate pipe\n");
828 return -ENOMEM;
829 }
830
831 info->size = pipe_size;
832
833 /*
834 * init pipe
835 */
836 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
837 pipe->priv = priv;
838
839 usbhs_pipe_type(pipe) =
840 pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;
841
842 dev_dbg(dev, "pipe %x\t: %s\n",
843 i, usbhsp_pipe_name[pipe_type[i]]);
844 }
845
846 return 0;
847 }
848
849 void usbhs_pipe_remove(struct usbhs_priv *priv)
850 {
851 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
852
853 kfree(info->pipe);
854 }
Linux kernel - Deliverables
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