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