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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
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}