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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#define usbhsp_type(p) ((p)->pipe_type)
33#define usbhsp_type_is(p, t) ((p)->pipe_type == t)
34
35/*
36 * for debug
37 */
38static char *usbhsp_pipe_name[] = {
39 [USB_ENDPOINT_XFER_CONTROL] = "DCP",
40 [USB_ENDPOINT_XFER_BULK] = "BULK",
41 [USB_ENDPOINT_XFER_INT] = "INT",
42 [USB_ENDPOINT_XFER_ISOC] = "ISO",
43};
44
45/*
46 * usb request functions
47 */
48void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
49{
50 u16 val;
51
52 val = usbhs_read(priv, USBREQ);
53 req->bRequest = (val >> 8) & 0xFF;
54 req->bRequestType = (val >> 0) & 0xFF;
55
56 req->wValue = usbhs_read(priv, USBVAL);
57 req->wIndex = usbhs_read(priv, USBINDX);
58 req->wLength = usbhs_read(priv, USBLENG);
59}
60
61void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
62{
63 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
64 usbhs_write(priv, USBVAL, req->wValue);
65 usbhs_write(priv, USBINDX, req->wIndex);
66 usbhs_write(priv, USBLENG, req->wLength);
67}
68
69/*
70 * DCPCTR/PIPEnCTR functions
71 */
72static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
73{
74 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
75 int offset = usbhsp_addr_offset(pipe);
76
77 if (usbhs_pipe_is_dcp(pipe))
78 usbhs_bset(priv, DCPCTR, mask, val);
79 else
80 usbhs_bset(priv, PIPEnCTR + offset, mask, val);
81}
82
83static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
84{
85 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
86 int offset = usbhsp_addr_offset(pipe);
87
88 if (usbhs_pipe_is_dcp(pipe))
89 return usbhs_read(priv, DCPCTR);
90 else
91 return usbhs_read(priv, PIPEnCTR + offset);
92}
93
94/*
95 * DCP/PIPE functions
96 */
97static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
98 u16 dcp_reg, u16 pipe_reg,
99 u16 mask, u16 val)
100{
101 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
102
103 if (usbhs_pipe_is_dcp(pipe))
104 usbhs_bset(priv, dcp_reg, mask, val);
105 else
106 usbhs_bset(priv, pipe_reg, mask, val);
107}
108
109static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
110 u16 dcp_reg, u16 pipe_reg)
111{
112 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
113
114 if (usbhs_pipe_is_dcp(pipe))
115 return usbhs_read(priv, dcp_reg);
116 else
117 return usbhs_read(priv, pipe_reg);
118}
119
120/*
121 * DCPCFG/PIPECFG functions
122 */
123static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
124{
125 __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
126}
127
128/*
129 * PIPEBUF
130 */
131static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
132{
133 if (usbhs_pipe_is_dcp(pipe))
134 return;
135
136 __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
137}
138
139/*
140 * DCPMAXP/PIPEMAXP
141 */
142static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
143{
144 __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
145}
146
147static u16 usbhsp_pipe_maxp_get(struct usbhs_pipe *pipe)
148{
149 return __usbhsp_pipe_xxx_get(pipe, DCPMAXP, PIPEMAXP);
150}
151
152/*
153 * pipe control functions
154 */
155static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
156{
157 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
158
159 /*
160 * On pipe, this is necessary before
161 * accesses to below registers.
162 *
163 * PIPESEL : usbhsp_pipe_select
164 * PIPECFG : usbhsp_pipe_cfg_xxx
165 * PIPEBUF : usbhsp_pipe_buf_xxx
166 * PIPEMAXP : usbhsp_pipe_maxp_xxx
167 * PIPEPERI
168 */
169
170 /*
171 * if pipe is dcp, no pipe is selected.
172 * it is no problem, because dcp have its register
173 */
174 usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
175}
176
177static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
178{
179 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
180 int timeout = 1024;
181 u16 val;
182
183 /*
184 * make sure....
185 *
186 * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
187 * specified by the CURPIPE bits.
188 * When changing the setting of this bit after changing
189 * the PID bits for the selected pipe from BUF to NAK,
190 * check that CSSTS = 0 and PBUSY = 0.
191 */
192
193 /*
194 * CURPIPE bit = 0
195 *
196 * see also
197 * "Operation"
198 * - "Pipe Control"
199 * - "Pipe Control Registers Switching Procedure"
200 */
201 usbhs_write(priv, CFIFOSEL, 0);
202 usbhs_pipe_disable(pipe);
203
204 do {
205 val = usbhsp_pipectrl_get(pipe);
206 val &= CSSTS | PID_MASK;
207 if (!val)
208 return 0;
209
210 udelay(10);
211
212 } while (timeout--);
213
214 return -EBUSY;
215}
216
217int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
218{
219 u16 val;
220
221 val = usbhsp_pipectrl_get(pipe);
222 if (val & BSTS)
223 return 0;
224
225 return -EBUSY;
226}
227
228/*
229 * PID ctrl
230 */
231static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
232{
233 u16 pid = usbhsp_pipectrl_get(pipe);
234
235 pid &= PID_MASK;
236
237 /*
238 * see
239 * "Pipe n Control Register" - "PID"
240 */
241 switch (pid) {
242 case PID_STALL11:
243 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
244 /* fall-through */
245 case PID_STALL10:
246 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
247 }
248}
249
250void usbhs_pipe_disable(struct usbhs_pipe *pipe)
251{
252 int timeout = 1024;
253 u16 val;
254
255 /* see "Pipe n Control Register" - "PID" */
256 __usbhsp_pid_try_nak_if_stall(pipe);
257
258 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
259
260 do {
261 val = usbhsp_pipectrl_get(pipe);
262 val &= PBUSY;
263 if (!val)
264 break;
265
266 udelay(10);
267 } while (timeout--);
268}
269
270void usbhs_pipe_enable(struct usbhs_pipe *pipe)
271{
272 /* see "Pipe n Control Register" - "PID" */
273 __usbhsp_pid_try_nak_if_stall(pipe);
274
275 usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
276}
277
278void usbhs_pipe_stall(struct usbhs_pipe *pipe)
279{
280 u16 pid = usbhsp_pipectrl_get(pipe);
281
282 pid &= PID_MASK;
283
284 /*
285 * see
286 * "Pipe n Control Register" - "PID"
287 */
288 switch (pid) {
289 case PID_NAK:
290 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
291 break;
292 case PID_BUF:
293 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
294 break;
295 }
296}
297
298/*
299 * pipe setup
300 */
301static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
302{
303 /*
304 * only ISO / BULK pipe can use double buffer
305 */
306 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
307 usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
308 return 1;
309
310 return 0;
311}
312
313static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
314 const struct usb_endpoint_descriptor *desc,
315 int is_host)
316{
317 u16 type = 0;
318 u16 bfre = 0;
319 u16 dblb = 0;
320 u16 cntmd = 0;
321 u16 dir = 0;
322 u16 epnum = 0;
323 u16 shtnak = 0;
324 u16 type_array[] = {
325 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
326 [USB_ENDPOINT_XFER_INT] = TYPE_INT,
327 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
328 };
329 int is_double = usbhsp_possible_double_buffer(pipe);
330
331 if (usbhs_pipe_is_dcp(pipe))
332 return -EINVAL;
333
334 /*
335 * PIPECFG
336 *
337 * see
338 * - "Register Descriptions" - "PIPECFG" register
339 * - "Features" - "Pipe configuration"
340 * - "Operation" - "Pipe Control"
341 */
342
343 /* TYPE */
344 type = type_array[usbhsp_type(pipe)];
345
346 /* BFRE */
347 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
348 usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
349 bfre = 0; /* FIXME */
350
351 /* DBLB */
352 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
353 usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
354 dblb = (is_double) ? DBLB : 0;
355
356 /* CNTMD */
357 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
358 cntmd = 0; /* FIXME */
359
360 /* DIR */
361 if (usb_endpoint_dir_in(desc))
362 usbhsp_flags_set(pipe, IS_DIR_HOST);
363
364 if ((is_host && usb_endpoint_dir_out(desc)) ||
365 (!is_host && usb_endpoint_dir_in(desc)))
366 dir |= DIR_OUT;
367
368 if (!dir)
369 usbhsp_flags_set(pipe, IS_DIR_IN);
370
371 /* SHTNAK */
372 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
373 !dir)
374 shtnak = SHTNAK;
375
376 /* EPNUM */
377 epnum = 0xF & usb_endpoint_num(desc);
378
379 return type |
380 bfre |
381 dblb |
382 cntmd |
383 dir |
384 shtnak |
385 epnum;
386}
387
388static u16 usbhsp_setup_pipemaxp(struct usbhs_pipe *pipe,
389 const struct usb_endpoint_descriptor *desc,
390 int is_host)
391{
392 /* host should set DEVSEL */
393
394 /* reutn MXPS */
395 return PIPE_MAXP_MASK & le16_to_cpu(desc->wMaxPacketSize);
396}
397
398static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe,
399 const struct usb_endpoint_descriptor *desc,
400 int is_host)
401{
402 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
403 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
404 struct device *dev = usbhs_priv_to_dev(priv);
405 int pipe_num = usbhs_pipe_number(pipe);
406 int is_double = usbhsp_possible_double_buffer(pipe);
407 u16 buff_size;
408 u16 bufnmb;
409 u16 bufnmb_cnt;
410
411 /*
412 * PIPEBUF
413 *
414 * see
415 * - "Register Descriptions" - "PIPEBUF" register
416 * - "Features" - "Pipe configuration"
417 * - "Operation" - "FIFO Buffer Memory"
418 * - "Operation" - "Pipe Control"
419 *
420 * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
421 *
422 * BUFNMB: PIPE
423 * 0: pipe0 (DCP 256byte)
424 * 1: -
425 * 2: -
426 * 3: -
427 * 4: pipe6 (INT 64byte)
428 * 5: pipe7 (INT 64byte)
429 * 6: pipe8 (INT 64byte)
430 * 7: pipe9 (INT 64byte)
431 * 8 - xx: free (for BULK, ISOC)
432 */
433
434 /*
435 * FIXME
436 *
437 * it doesn't have good buffer allocator
438 *
439 * DCP : 256 byte
440 * BULK: 512 byte
441 * INT : 64 byte
442 * ISOC: 512 byte
443 */
444 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
445 buff_size = 256;
446 else if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
447 buff_size = 64;
448 else
449 buff_size = 512;
450
451 /* change buff_size to register value */
452 bufnmb_cnt = (buff_size / 64) - 1;
453
454 /* BUFNMB has been reserved for INT pipe
455 * see above */
456 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT)) {
457 bufnmb = pipe_num - 2;
458 } else {
459 bufnmb = info->bufnmb_last;
460 info->bufnmb_last += bufnmb_cnt + 1;
461
462 /*
463 * double buffer
464 */
465 if (is_double)
466 info->bufnmb_last += bufnmb_cnt + 1;
467 }
468
469 dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
470 pipe_num, buff_size, bufnmb);
471
472 return (0x1f & bufnmb_cnt) << 10 |
473 (0xff & bufnmb) << 0;
474}
475
476/*
477 * pipe control
478 */
479int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
480{
481 u16 mask = usbhs_pipe_is_dcp(pipe) ? DCP_MAXP_MASK : PIPE_MAXP_MASK;
482
483 usbhsp_pipe_select(pipe);
484
485 return (int)(usbhsp_pipe_maxp_get(pipe) & mask);
486}
487
488int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
489{
490 return usbhsp_flags_has(pipe, IS_DIR_IN);
491}
492
493int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
494{
495 return usbhsp_flags_has(pipe, IS_DIR_HOST);
496}
497
498void usbhs_pipe_clear_sequence(struct usbhs_pipe *pipe)
499{
500 usbhsp_pipectrl_set(pipe, SQCLR, SQCLR);
501}
502
503void usbhs_pipe_clear(struct usbhs_pipe *pipe)
504{
505 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
506 usbhsp_pipectrl_set(pipe, ACLRM, 0);
507}
508
509static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
510{
511 struct usbhs_pipe *pos, *pipe;
512 int i;
513
514 /*
515 * find target pipe
516 */
517 pipe = NULL;
518 usbhs_for_each_pipe_with_dcp(pos, priv, i) {
519 if (!usbhsp_type_is(pos, type))
520 continue;
521 if (usbhsp_flags_has(pos, IS_USED))
522 continue;
523
524 pipe = pos;
525 break;
526 }
527
528 if (!pipe)
529 return NULL;
530
531 /*
532 * initialize pipe flags
533 */
534 usbhsp_flags_init(pipe);
535 usbhsp_flags_set(pipe, IS_USED);
536
537 return pipe;
538}
539
540void usbhs_pipe_init(struct usbhs_priv *priv,
541 void (*done)(struct usbhs_pkt *pkt),
542 int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map))
543{
544 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
545 struct device *dev = usbhs_priv_to_dev(priv);
546 struct usbhs_pipe *pipe;
547 int i;
548
549 if (!done) {
550 dev_err(dev, "no done function\n");
551 return;
552 }
553
554 /*
555 * FIXME
556 *
557 * driver needs good allocator.
558 *
559 * find first free buffer area (BULK, ISOC)
560 * (DCP, INT area is fixed)
561 *
562 * buffer number 0 - 3 have been reserved for DCP
563 * see
564 * usbhsp_to_bufnmb
565 */
566 info->bufnmb_last = 4;
567 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
568 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
569 info->bufnmb_last++;
570
571 usbhsp_flags_init(pipe);
572 pipe->fifo = NULL;
573 pipe->mod_private = NULL;
574 INIT_LIST_HEAD(&pipe->list);
575
576 /* pipe force init */
577 usbhs_pipe_clear(pipe);
578 }
579
580 info->done = done;
581 info->dma_map_ctrl = dma_map_ctrl;
582}
583
584struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
585 const struct usb_endpoint_descriptor *desc)
586{
587 struct device *dev = usbhs_priv_to_dev(priv);
588 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
589 struct usbhs_pipe *pipe;
590 int is_host = usbhs_mod_is_host(priv, mod);
591 int ret;
592 u16 pipecfg, pipebuf, pipemaxp;
593
594 pipe = usbhsp_get_pipe(priv, usb_endpoint_type(desc));
595 if (!pipe) {
596 dev_err(dev, "can't get pipe (%s)\n",
597 usbhsp_pipe_name[usb_endpoint_type(desc)]);
598 return NULL;
599 }
600
601 INIT_LIST_HEAD(&pipe->list);
602
603 usbhs_pipe_disable(pipe);
604
605 /* make sure pipe is not busy */
606 ret = usbhsp_pipe_barrier(pipe);
607 if (ret < 0) {
608 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
609 return NULL;
610 }
611
612 pipecfg = usbhsp_setup_pipecfg(pipe, desc, is_host);
613 pipebuf = usbhsp_setup_pipebuff(pipe, desc, is_host);
614 pipemaxp = usbhsp_setup_pipemaxp(pipe, desc, is_host);
615
616 usbhsp_pipe_select(pipe);
617 usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
618 usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
619 usbhsp_pipe_maxp_set(pipe, 0xFFFF, pipemaxp);
620
621 usbhs_pipe_clear_sequence(pipe);
622
623 dev_dbg(dev, "enable pipe %d : %s (%s)\n",
624 usbhs_pipe_number(pipe),
625 usbhsp_pipe_name[usb_endpoint_type(desc)],
626 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
627
628 return pipe;
629}
630
631void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
632{
633 if (pipe->fifo)
634 pipe->fifo->pipe = NULL;
635
636 pipe->fifo = fifo;
637
638 if (fifo)
639 fifo->pipe = pipe;
640}
641
642
643/*
644 * dcp control
645 */
646struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
647{
648 struct usbhs_pipe *pipe;
649
650 pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
651 if (!pipe)
652 return NULL;
653
654 /*
655 * dcpcfg : default
656 * dcpmaxp : default
657 * pipebuf : nothing to do
658 */
659
660 usbhsp_pipe_select(pipe);
661 usbhs_pipe_clear_sequence(pipe);
662 INIT_LIST_HEAD(&pipe->list);
663
664 return pipe;
665}
666
667void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
668{
669 WARN_ON(!usbhs_pipe_is_dcp(pipe));
670
671 usbhs_pipe_enable(pipe);
672 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
673}
674
675/*
676 * pipe module function
677 */
678int usbhs_pipe_probe(struct usbhs_priv *priv)
679{
680 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
681 struct usbhs_pipe *pipe;
682 struct device *dev = usbhs_priv_to_dev(priv);
683 u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
684 int pipe_size = usbhs_get_dparam(priv, pipe_size);
685 int i;
686
687 /* This driver expects 1st pipe is DCP */
688 if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
689 dev_err(dev, "1st PIPE is not DCP\n");
690 return -EINVAL;
691 }
692
693 info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
694 if (!info->pipe) {
695 dev_err(dev, "Could not allocate pipe\n");
696 return -ENOMEM;
697 }
698
699 info->size = pipe_size;
700
701 /*
702 * init pipe
703 */
704 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
705 pipe->priv = priv;
706 usbhsp_type(pipe) = pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;
707
708 dev_dbg(dev, "pipe %x\t: %s\n",
709 i, usbhsp_pipe_name[pipe_type[i]]);
710 }
711
712 return 0;
713}
714
715void usbhs_pipe_remove(struct usbhs_priv *priv)
716{
717 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
718
719 kfree(info->pipe);
720}
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
280/*
281 * PID ctrl
282 */
283static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
284{
285 u16 pid = usbhsp_pipectrl_get(pipe);
286
287 pid &= PID_MASK;
288
289 /*
290 * see
291 * "Pipe n Control Register" - "PID"
292 */
293 switch (pid) {
294 case PID_STALL11:
295 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
296 /* fall-through */
297 case PID_STALL10:
298 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
299 }
300}
301
302void usbhs_pipe_disable(struct usbhs_pipe *pipe)
303{
304 int timeout = 1024;
305 u16 val;
306
307 /* see "Pipe n Control Register" - "PID" */
308 __usbhsp_pid_try_nak_if_stall(pipe);
309
310 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
311
312 do {
313 val = usbhsp_pipectrl_get(pipe);
314 val &= PBUSY;
315 if (!val)
316 break;
317
318 udelay(10);
319 } while (timeout--);
320}
321
322void usbhs_pipe_enable(struct usbhs_pipe *pipe)
323{
324 /* see "Pipe n Control Register" - "PID" */
325 __usbhsp_pid_try_nak_if_stall(pipe);
326
327 usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
328}
329
330void usbhs_pipe_stall(struct usbhs_pipe *pipe)
331{
332 u16 pid = usbhsp_pipectrl_get(pipe);
333
334 pid &= PID_MASK;
335
336 /*
337 * see
338 * "Pipe n Control Register" - "PID"
339 */
340 switch (pid) {
341 case PID_NAK:
342 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
343 break;
344 case PID_BUF:
345 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
346 break;
347 }
348}
349
350int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
351{
352 u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
353
354 return (int)(pid == PID_STALL10 || pid == PID_STALL11);
355}
356
357void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
358{
359 if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
360 return;
361
362 /*
363 * clear and disable transfer counter for IN/OUT pipe
364 */
365 usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
366
367 /*
368 * Only IN direction bulk pipe can use transfer count.
369 * Without using this function,
370 * received data will break if it was large data size.
371 * see PIPEnTRN/PIPEnTRE for detail
372 */
373 if (usbhs_pipe_is_dir_in(pipe)) {
374 int maxp = usbhs_pipe_get_maxpacket(pipe);
375
376 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
377 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
378 }
379}
380
381
382/*
383 * pipe setup
384 */
385static int usbhsp_setup_pipecfg(struct usbhs_pipe *pipe, int is_host,
386 int dir_in, u16 *pipecfg)
387{
388 u16 type = 0;
389 u16 bfre = 0;
390 u16 dblb = 0;
391 u16 cntmd = 0;
392 u16 dir = 0;
393 u16 epnum = 0;
394 u16 shtnak = 0;
395 static const u16 type_array[] = {
396 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
397 [USB_ENDPOINT_XFER_INT] = TYPE_INT,
398 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
399 };
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: see usbhs_pipe_config_update() */
422
423 /* CNTMD */
424 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
425 cntmd = 0; /* FIXME */
426
427 /* DIR */
428 if (dir_in)
429 usbhsp_flags_set(pipe, IS_DIR_HOST);
430
431 if (!!is_host ^ !!dir_in)
432 dir |= DIR_OUT;
433
434 if (!dir)
435 usbhsp_flags_set(pipe, IS_DIR_IN);
436
437 /* SHTNAK */
438 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
439 !dir)
440 shtnak = SHTNAK;
441
442 /* EPNUM */
443 epnum = 0; /* see usbhs_pipe_config_update() */
444 *pipecfg = type |
445 bfre |
446 dblb |
447 cntmd |
448 dir |
449 shtnak |
450 epnum;
451 return 0;
452}
453
454static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
455{
456 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
457 struct device *dev = usbhs_priv_to_dev(priv);
458 int pipe_num = usbhs_pipe_number(pipe);
459 u16 buff_size;
460 u16 bufnmb;
461 u16 bufnmb_cnt;
462 struct renesas_usbhs_driver_pipe_config *pipe_config =
463 usbhsp_get_pipe_config(priv, pipe_num);
464
465 /*
466 * PIPEBUF
467 *
468 * see
469 * - "Register Descriptions" - "PIPEBUF" register
470 * - "Features" - "Pipe configuration"
471 * - "Operation" - "FIFO Buffer Memory"
472 * - "Operation" - "Pipe Control"
473 */
474 buff_size = pipe_config->bufsize;
475 bufnmb = pipe_config->bufnum;
476
477 /* change buff_size to register value */
478 bufnmb_cnt = (buff_size / 64) - 1;
479
480 dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
481 pipe_num, buff_size, bufnmb);
482
483 return (0x1f & bufnmb_cnt) << 10 |
484 (0xff & bufnmb) << 0;
485}
486
487void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
488 u16 epnum, u16 maxp)
489{
490 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
491 int pipe_num = usbhs_pipe_number(pipe);
492 struct renesas_usbhs_driver_pipe_config *pipe_config =
493 usbhsp_get_pipe_config(priv, pipe_num);
494 u16 dblb = pipe_config->double_buf ? DBLB : 0;
495
496 if (devsel > 0xA) {
497 struct device *dev = usbhs_priv_to_dev(priv);
498
499 dev_err(dev, "devsel error %d\n", devsel);
500
501 devsel = 0;
502 }
503
504 usbhsp_pipe_barrier(pipe);
505
506 pipe->maxp = maxp;
507
508 usbhsp_pipe_select(pipe);
509 usbhsp_pipe_maxp_set(pipe, 0xFFFF,
510 (devsel << 12) |
511 maxp);
512
513 if (!usbhs_pipe_is_dcp(pipe))
514 usbhsp_pipe_cfg_set(pipe, 0x000F | DBLB, epnum | dblb);
515}
516
517/*
518 * pipe control
519 */
520int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
521{
522 /*
523 * see
524 * usbhs_pipe_config_update()
525 * usbhs_dcp_malloc()
526 */
527 return pipe->maxp;
528}
529
530int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
531{
532 return usbhsp_flags_has(pipe, IS_DIR_IN);
533}
534
535int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
536{
537 return usbhsp_flags_has(pipe, IS_DIR_HOST);
538}
539
540int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
541{
542 return usbhsp_flags_has(pipe, IS_RUNNING);
543}
544
545void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
546{
547 if (running)
548 usbhsp_flags_set(pipe, IS_RUNNING);
549 else
550 usbhsp_flags_clr(pipe, IS_RUNNING);
551}
552
553void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
554{
555 u16 mask = (SQCLR | SQSET);
556 u16 val;
557
558 /*
559 * sequence
560 * 0 : data0
561 * 1 : data1
562 * -1 : no change
563 */
564 switch (sequence) {
565 case 0:
566 val = SQCLR;
567 break;
568 case 1:
569 val = SQSET;
570 break;
571 default:
572 return;
573 }
574
575 usbhsp_pipectrl_set(pipe, mask, val);
576}
577
578static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
579{
580 return !!(usbhsp_pipectrl_get(pipe) & SQMON);
581}
582
583void usbhs_pipe_clear(struct usbhs_pipe *pipe)
584{
585 if (usbhs_pipe_is_dcp(pipe)) {
586 usbhs_fifo_clear_dcp(pipe);
587 } else {
588 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
589 usbhsp_pipectrl_set(pipe, ACLRM, 0);
590 }
591}
592
593/* Should call usbhsp_pipe_select() before */
594void usbhs_pipe_clear_without_sequence(struct usbhs_pipe *pipe,
595 int needs_bfre, int bfre_enable)
596{
597 int sequence;
598
599 usbhsp_pipe_select(pipe);
600 sequence = usbhs_pipe_get_data_sequence(pipe);
601 if (needs_bfre)
602 usbhsp_pipe_cfg_set(pipe, BFRE, bfre_enable ? BFRE : 0);
603 usbhs_pipe_clear(pipe);
604 usbhs_pipe_data_sequence(pipe, sequence);
605}
606
607void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
608{
609 if (usbhs_pipe_is_dcp(pipe))
610 return;
611
612 usbhsp_pipe_select(pipe);
613 /* check if the driver needs to change the BFRE value */
614 if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
615 return;
616
617 usbhs_pipe_clear_without_sequence(pipe, 1, enable);
618}
619
620static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
621{
622 struct usbhs_pipe *pos, *pipe;
623 int i;
624
625 /*
626 * find target pipe
627 */
628 pipe = NULL;
629 usbhs_for_each_pipe_with_dcp(pos, priv, i) {
630 if (!usbhs_pipe_type_is(pos, type))
631 continue;
632 if (usbhsp_flags_has(pos, IS_USED))
633 continue;
634
635 pipe = pos;
636 break;
637 }
638
639 if (!pipe)
640 return NULL;
641
642 /*
643 * initialize pipe flags
644 */
645 usbhsp_flags_init(pipe);
646 usbhsp_flags_set(pipe, IS_USED);
647
648 return pipe;
649}
650
651static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
652{
653 usbhsp_flags_init(pipe);
654}
655
656void usbhs_pipe_init(struct usbhs_priv *priv,
657 int (*dma_map_ctrl)(struct device *dma_dev,
658 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 if (usbhsp_setup_pipecfg(pipe, is_host, dir_in, &pipecfg)) {
706 dev_err(dev, "can't setup pipe\n");
707 return NULL;
708 }
709
710 pipebuf = usbhsp_setup_pipebuff(pipe);
711
712 usbhsp_pipe_select(pipe);
713 usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
714 usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
715 usbhs_pipe_clear(pipe);
716
717 usbhs_pipe_sequence_data0(pipe);
718
719 dev_dbg(dev, "enable pipe %d : %s (%s)\n",
720 usbhs_pipe_number(pipe),
721 usbhs_pipe_name(pipe),
722 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
723
724 /*
725 * epnum / maxp are still not set to this pipe.
726 * call usbhs_pipe_config_update() after this function !!
727 */
728
729 return pipe;
730}
731
732void usbhs_pipe_free(struct usbhs_pipe *pipe)
733{
734 usbhsp_put_pipe(pipe);
735}
736
737void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
738{
739 if (pipe->fifo)
740 pipe->fifo->pipe = NULL;
741
742 pipe->fifo = fifo;
743
744 if (fifo)
745 fifo->pipe = pipe;
746}
747
748
749/*
750 * dcp control
751 */
752struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
753{
754 struct usbhs_pipe *pipe;
755
756 pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
757 if (!pipe)
758 return NULL;
759
760 INIT_LIST_HEAD(&pipe->list);
761
762 /*
763 * call usbhs_pipe_config_update() after this function !!
764 */
765
766 return pipe;
767}
768
769void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
770{
771 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
772
773 WARN_ON(!usbhs_pipe_is_dcp(pipe));
774
775 usbhs_pipe_enable(pipe);
776
777 if (!usbhs_mod_is_host(priv)) /* funconly */
778 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
779}
780
781void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
782{
783 usbhsp_pipe_cfg_set(pipe, DIR_OUT,
784 dir_out ? DIR_OUT : 0);
785}
786
787/*
788 * pipe module function
789 */
790int usbhs_pipe_probe(struct usbhs_priv *priv)
791{
792 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
793 struct usbhs_pipe *pipe;
794 struct device *dev = usbhs_priv_to_dev(priv);
795 struct renesas_usbhs_driver_pipe_config *pipe_configs =
796 usbhs_get_dparam(priv, pipe_configs);
797 int pipe_size = usbhs_get_dparam(priv, pipe_size);
798 int i;
799
800 /* This driver expects 1st pipe is DCP */
801 if (pipe_configs[0].type != USB_ENDPOINT_XFER_CONTROL) {
802 dev_err(dev, "1st PIPE is not DCP\n");
803 return -EINVAL;
804 }
805
806 info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
807 if (!info->pipe)
808 return -ENOMEM;
809
810 info->size = pipe_size;
811
812 /*
813 * init pipe
814 */
815 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
816 pipe->priv = priv;
817
818 usbhs_pipe_type(pipe) =
819 pipe_configs[i].type & USB_ENDPOINT_XFERTYPE_MASK;
820
821 dev_dbg(dev, "pipe %x\t: %s\n",
822 i, usbhsp_pipe_name[pipe_configs[i].type]);
823 }
824
825 return 0;
826}
827
828void usbhs_pipe_remove(struct usbhs_priv *priv)
829{
830 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
831
832 kfree(info->pipe);
833}