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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
47/*
48 * DCPCTR/PIPEnCTR functions
49 */
50static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
51{
52 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
53 int offset = usbhsp_addr_offset(pipe);
54
55 if (usbhs_pipe_is_dcp(pipe))
56 usbhs_bset(priv, DCPCTR, mask, val);
57 else
58 usbhs_bset(priv, PIPEnCTR + offset, mask, val);
59}
60
61static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
62{
63 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
64 int offset = usbhsp_addr_offset(pipe);
65
66 if (usbhs_pipe_is_dcp(pipe))
67 return usbhs_read(priv, DCPCTR);
68 else
69 return usbhs_read(priv, PIPEnCTR + offset);
70}
71
72/*
73 * DCP/PIPE functions
74 */
75static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
76 u16 dcp_reg, u16 pipe_reg,
77 u16 mask, u16 val)
78{
79 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
80
81 if (usbhs_pipe_is_dcp(pipe))
82 usbhs_bset(priv, dcp_reg, mask, val);
83 else
84 usbhs_bset(priv, pipe_reg, mask, val);
85}
86
87/*
88 * DCPCFG/PIPECFG functions
89 */
90static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
91{
92 __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
93}
94
95/*
96 * PIPEnTRN/PIPEnTRE functions
97 */
98static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
99{
100 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
101 struct device *dev = usbhs_priv_to_dev(priv);
102 int num = usbhs_pipe_number(pipe);
103 u16 reg;
104
105 /*
106 * It is impossible to calculate address,
107 * since PIPEnTRN addresses were mapped randomly.
108 */
109#define CASE_PIPExTRN(a) \
110 case 0x ## a: \
111 reg = PIPE ## a ## TRN; \
112 break;
113
114 switch (num) {
115 CASE_PIPExTRN(1);
116 CASE_PIPExTRN(2);
117 CASE_PIPExTRN(3);
118 CASE_PIPExTRN(4);
119 CASE_PIPExTRN(5);
120 CASE_PIPExTRN(B);
121 CASE_PIPExTRN(C);
122 CASE_PIPExTRN(D);
123 CASE_PIPExTRN(E);
124 CASE_PIPExTRN(F);
125 CASE_PIPExTRN(9);
126 CASE_PIPExTRN(A);
127 default:
128 dev_err(dev, "unknown pipe (%d)\n", num);
129 return;
130 }
131 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
132}
133
134static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
135{
136 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
137 struct device *dev = usbhs_priv_to_dev(priv);
138 int num = usbhs_pipe_number(pipe);
139 u16 reg;
140
141 /*
142 * It is impossible to calculate address,
143 * since PIPEnTRE addresses were mapped randomly.
144 */
145#define CASE_PIPExTRE(a) \
146 case 0x ## a: \
147 reg = PIPE ## a ## TRE; \
148 break;
149
150 switch (num) {
151 CASE_PIPExTRE(1);
152 CASE_PIPExTRE(2);
153 CASE_PIPExTRE(3);
154 CASE_PIPExTRE(4);
155 CASE_PIPExTRE(5);
156 CASE_PIPExTRE(B);
157 CASE_PIPExTRE(C);
158 CASE_PIPExTRE(D);
159 CASE_PIPExTRE(E);
160 CASE_PIPExTRE(F);
161 CASE_PIPExTRE(9);
162 CASE_PIPExTRE(A);
163 default:
164 dev_err(dev, "unknown pipe (%d)\n", num);
165 return;
166 }
167
168 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
169}
170
171/*
172 * PIPEBUF
173 */
174static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
175{
176 if (usbhs_pipe_is_dcp(pipe))
177 return;
178
179 __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
180}
181
182/*
183 * DCPMAXP/PIPEMAXP
184 */
185static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
186{
187 __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
188}
189
190/*
191 * pipe control functions
192 */
193static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
194{
195 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
196
197 /*
198 * On pipe, this is necessary before
199 * accesses to below registers.
200 *
201 * PIPESEL : usbhsp_pipe_select
202 * PIPECFG : usbhsp_pipe_cfg_xxx
203 * PIPEBUF : usbhsp_pipe_buf_xxx
204 * PIPEMAXP : usbhsp_pipe_maxp_xxx
205 * PIPEPERI
206 */
207
208 /*
209 * if pipe is dcp, no pipe is selected.
210 * it is no problem, because dcp have its register
211 */
212 usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
213}
214
215static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
216{
217 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
218 int timeout = 1024;
219 u16 val;
220
221 /*
222 * make sure....
223 *
224 * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
225 * specified by the CURPIPE bits.
226 * When changing the setting of this bit after changing
227 * the PID bits for the selected pipe from BUF to NAK,
228 * check that CSSTS = 0 and PBUSY = 0.
229 */
230
231 /*
232 * CURPIPE bit = 0
233 *
234 * see also
235 * "Operation"
236 * - "Pipe Control"
237 * - "Pipe Control Registers Switching Procedure"
238 */
239 usbhs_write(priv, CFIFOSEL, 0);
240 usbhs_pipe_disable(pipe);
241
242 do {
243 val = usbhsp_pipectrl_get(pipe);
244 val &= CSSTS | PID_MASK;
245 if (!val)
246 return 0;
247
248 udelay(10);
249
250 } while (timeout--);
251
252 return -EBUSY;
253}
254
255int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
256{
257 u16 val;
258
259 val = usbhsp_pipectrl_get(pipe);
260 if (val & BSTS)
261 return 0;
262
263 return -EBUSY;
264}
265
266/*
267 * PID ctrl
268 */
269static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
270{
271 u16 pid = usbhsp_pipectrl_get(pipe);
272
273 pid &= PID_MASK;
274
275 /*
276 * see
277 * "Pipe n Control Register" - "PID"
278 */
279 switch (pid) {
280 case PID_STALL11:
281 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
282 /* fall-through */
283 case PID_STALL10:
284 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
285 }
286}
287
288void usbhs_pipe_disable(struct usbhs_pipe *pipe)
289{
290 int timeout = 1024;
291 u16 val;
292
293 /* see "Pipe n Control Register" - "PID" */
294 __usbhsp_pid_try_nak_if_stall(pipe);
295
296 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
297
298 do {
299 val = usbhsp_pipectrl_get(pipe);
300 val &= PBUSY;
301 if (!val)
302 break;
303
304 udelay(10);
305 } while (timeout--);
306}
307
308void usbhs_pipe_enable(struct usbhs_pipe *pipe)
309{
310 /* see "Pipe n Control Register" - "PID" */
311 __usbhsp_pid_try_nak_if_stall(pipe);
312
313 usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
314}
315
316void usbhs_pipe_stall(struct usbhs_pipe *pipe)
317{
318 u16 pid = usbhsp_pipectrl_get(pipe);
319
320 pid &= PID_MASK;
321
322 /*
323 * see
324 * "Pipe n Control Register" - "PID"
325 */
326 switch (pid) {
327 case PID_NAK:
328 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
329 break;
330 case PID_BUF:
331 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
332 break;
333 }
334}
335
336int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
337{
338 u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
339
340 return (int)(pid == PID_STALL10 || pid == PID_STALL11);
341}
342
343void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
344{
345 if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
346 return;
347
348 /*
349 * clear and disable transfer counter for IN/OUT pipe
350 */
351 usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
352
353 /*
354 * Only IN direction bulk pipe can use transfer count.
355 * Without using this function,
356 * received data will break if it was large data size.
357 * see PIPEnTRN/PIPEnTRE for detail
358 */
359 if (usbhs_pipe_is_dir_in(pipe)) {
360 int maxp = usbhs_pipe_get_maxpacket(pipe);
361
362 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
363 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
364 }
365}
366
367
368/*
369 * pipe setup
370 */
371static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
372{
373 /*
374 * only ISO / BULK pipe can use double buffer
375 */
376 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
377 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
378 return 1;
379
380 return 0;
381}
382
383static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
384 int is_host,
385 int dir_in)
386{
387 u16 type = 0;
388 u16 bfre = 0;
389 u16 dblb = 0;
390 u16 cntmd = 0;
391 u16 dir = 0;
392 u16 epnum = 0;
393 u16 shtnak = 0;
394 u16 type_array[] = {
395 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
396 [USB_ENDPOINT_XFER_INT] = TYPE_INT,
397 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
398 };
399 int is_double = usbhsp_possible_double_buffer(pipe);
400
401 if (usbhs_pipe_is_dcp(pipe))
402 return -EINVAL;
403
404 /*
405 * PIPECFG
406 *
407 * see
408 * - "Register Descriptions" - "PIPECFG" register
409 * - "Features" - "Pipe configuration"
410 * - "Operation" - "Pipe Control"
411 */
412
413 /* TYPE */
414 type = type_array[usbhs_pipe_type(pipe)];
415
416 /* BFRE */
417 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
418 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
419 bfre = 0; /* FIXME */
420
421 /* DBLB */
422 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
423 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
424 dblb = (is_double) ? DBLB : 0;
425
426 /* CNTMD */
427 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
428 cntmd = 0; /* FIXME */
429
430 /* DIR */
431 if (dir_in)
432 usbhsp_flags_set(pipe, IS_DIR_HOST);
433
434 if (!!is_host ^ !!dir_in)
435 dir |= DIR_OUT;
436
437 if (!dir)
438 usbhsp_flags_set(pipe, IS_DIR_IN);
439
440 /* SHTNAK */
441 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
442 !dir)
443 shtnak = SHTNAK;
444
445 /* EPNUM */
446 epnum = 0; /* see usbhs_pipe_config_update() */
447
448 return type |
449 bfre |
450 dblb |
451 cntmd |
452 dir |
453 shtnak |
454 epnum;
455}
456
457static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
458{
459 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
460 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
461 struct device *dev = usbhs_priv_to_dev(priv);
462 int pipe_num = usbhs_pipe_number(pipe);
463 int is_double = usbhsp_possible_double_buffer(pipe);
464 u16 buff_size;
465 u16 bufnmb;
466 u16 bufnmb_cnt;
467
468 /*
469 * PIPEBUF
470 *
471 * see
472 * - "Register Descriptions" - "PIPEBUF" register
473 * - "Features" - "Pipe configuration"
474 * - "Operation" - "FIFO Buffer Memory"
475 * - "Operation" - "Pipe Control"
476 *
477 * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
478 *
479 * BUFNMB: PIPE
480 * 0: pipe0 (DCP 256byte)
481 * 1: -
482 * 2: -
483 * 3: -
484 * 4: pipe6 (INT 64byte)
485 * 5: pipe7 (INT 64byte)
486 * 6: pipe8 (INT 64byte)
487 * 7: pipe9 (INT 64byte)
488 * 8 - xx: free (for BULK, ISOC)
489 */
490
491 /*
492 * FIXME
493 *
494 * it doesn't have good buffer allocator
495 *
496 * DCP : 256 byte
497 * BULK: 512 byte
498 * INT : 64 byte
499 * ISOC: 512 byte
500 */
501 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
502 buff_size = 256;
503 else if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))
504 buff_size = 64;
505 else
506 buff_size = 512;
507
508 /* change buff_size to register value */
509 bufnmb_cnt = (buff_size / 64) - 1;
510
511 /* BUFNMB has been reserved for INT pipe
512 * see above */
513 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT)) {
514 bufnmb = pipe_num - 2;
515 } else {
516 bufnmb = info->bufnmb_last;
517 info->bufnmb_last += bufnmb_cnt + 1;
518
519 /*
520 * double buffer
521 */
522 if (is_double)
523 info->bufnmb_last += bufnmb_cnt + 1;
524 }
525
526 dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
527 pipe_num, buff_size, bufnmb);
528
529 return (0x1f & bufnmb_cnt) << 10 |
530 (0xff & bufnmb) << 0;
531}
532
533void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
534 u16 epnum, u16 maxp)
535{
536 if (devsel > 0xA) {
537 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
538 struct device *dev = usbhs_priv_to_dev(priv);
539
540 dev_err(dev, "devsel error %d\n", devsel);
541
542 devsel = 0;
543 }
544
545 usbhsp_pipe_barrier(pipe);
546
547 pipe->maxp = maxp;
548
549 usbhsp_pipe_select(pipe);
550 usbhsp_pipe_maxp_set(pipe, 0xFFFF,
551 (devsel << 12) |
552 maxp);
553
554 if (!usbhs_pipe_is_dcp(pipe))
555 usbhsp_pipe_cfg_set(pipe, 0x000F, epnum);
556}
557
558/*
559 * pipe control
560 */
561int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
562{
563 /*
564 * see
565 * usbhs_pipe_config_update()
566 * usbhs_dcp_malloc()
567 */
568 return pipe->maxp;
569}
570
571int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
572{
573 return usbhsp_flags_has(pipe, IS_DIR_IN);
574}
575
576int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
577{
578 return usbhsp_flags_has(pipe, IS_DIR_HOST);
579}
580
581void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
582{
583 u16 mask = (SQCLR | SQSET);
584 u16 val;
585
586 /*
587 * sequence
588 * 0 : data0
589 * 1 : data1
590 * -1 : no change
591 */
592 switch (sequence) {
593 case 0:
594 val = SQCLR;
595 break;
596 case 1:
597 val = SQSET;
598 break;
599 default:
600 return;
601 }
602
603 usbhsp_pipectrl_set(pipe, mask, val);
604}
605
606void usbhs_pipe_clear(struct usbhs_pipe *pipe)
607{
608 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
609 usbhsp_pipectrl_set(pipe, ACLRM, 0);
610}
611
612static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
613{
614 struct usbhs_pipe *pos, *pipe;
615 int i;
616
617 /*
618 * find target pipe
619 */
620 pipe = NULL;
621 usbhs_for_each_pipe_with_dcp(pos, priv, i) {
622 if (!usbhs_pipe_type_is(pos, type))
623 continue;
624 if (usbhsp_flags_has(pos, IS_USED))
625 continue;
626
627 pipe = pos;
628 break;
629 }
630
631 if (!pipe)
632 return NULL;
633
634 /*
635 * initialize pipe flags
636 */
637 usbhsp_flags_init(pipe);
638 usbhsp_flags_set(pipe, IS_USED);
639
640 return pipe;
641}
642
643void usbhs_pipe_init(struct usbhs_priv *priv,
644 int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map))
645{
646 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
647 struct usbhs_pipe *pipe;
648 int i;
649
650 /*
651 * FIXME
652 *
653 * driver needs good allocator.
654 *
655 * find first free buffer area (BULK, ISOC)
656 * (DCP, INT area is fixed)
657 *
658 * buffer number 0 - 3 have been reserved for DCP
659 * see
660 * usbhsp_to_bufnmb
661 */
662 info->bufnmb_last = 4;
663 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
664 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))
665 info->bufnmb_last++;
666
667 usbhsp_flags_init(pipe);
668 pipe->fifo = NULL;
669 pipe->mod_private = NULL;
670 INIT_LIST_HEAD(&pipe->list);
671
672 /* pipe force init */
673 usbhs_pipe_clear(pipe);
674 }
675
676 info->dma_map_ctrl = dma_map_ctrl;
677}
678
679struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
680 int endpoint_type,
681 int dir_in)
682{
683 struct device *dev = usbhs_priv_to_dev(priv);
684 struct usbhs_pipe *pipe;
685 int is_host = usbhs_mod_is_host(priv);
686 int ret;
687 u16 pipecfg, pipebuf;
688
689 pipe = usbhsp_get_pipe(priv, endpoint_type);
690 if (!pipe) {
691 dev_err(dev, "can't get pipe (%s)\n",
692 usbhsp_pipe_name[endpoint_type]);
693 return NULL;
694 }
695
696 INIT_LIST_HEAD(&pipe->list);
697
698 usbhs_pipe_disable(pipe);
699
700 /* make sure pipe is not busy */
701 ret = usbhsp_pipe_barrier(pipe);
702 if (ret < 0) {
703 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
704 return NULL;
705 }
706
707 pipecfg = usbhsp_setup_pipecfg(pipe, is_host, dir_in);
708 pipebuf = usbhsp_setup_pipebuff(pipe);
709
710 usbhsp_pipe_select(pipe);
711 usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
712 usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
713
714 usbhs_pipe_sequence_data0(pipe);
715
716 dev_dbg(dev, "enable pipe %d : %s (%s)\n",
717 usbhs_pipe_number(pipe),
718 usbhs_pipe_name(pipe),
719 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
720
721 /*
722 * epnum / maxp are still not set to this pipe.
723 * call usbhs_pipe_config_update() after this function !!
724 */
725
726 return pipe;
727}
728
729void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
730{
731 if (pipe->fifo)
732 pipe->fifo->pipe = NULL;
733
734 pipe->fifo = fifo;
735
736 if (fifo)
737 fifo->pipe = pipe;
738}
739
740
741/*
742 * dcp control
743 */
744struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
745{
746 struct usbhs_pipe *pipe;
747
748 pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
749 if (!pipe)
750 return NULL;
751
752 INIT_LIST_HEAD(&pipe->list);
753
754 /*
755 * call usbhs_pipe_config_update() after this function !!
756 */
757
758 return pipe;
759}
760
761void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
762{
763 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
764
765 WARN_ON(!usbhs_pipe_is_dcp(pipe));
766
767 usbhs_pipe_enable(pipe);
768
769 if (!usbhs_mod_is_host(priv)) /* funconly */
770 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
771}
772
773void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
774{
775 usbhsp_pipe_cfg_set(pipe, DIR_OUT,
776 dir_out ? DIR_OUT : 0);
777}
778
779/*
780 * pipe module function
781 */
782int usbhs_pipe_probe(struct usbhs_priv *priv)
783{
784 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
785 struct usbhs_pipe *pipe;
786 struct device *dev = usbhs_priv_to_dev(priv);
787 u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
788 int pipe_size = usbhs_get_dparam(priv, pipe_size);
789 int i;
790
791 /* This driver expects 1st pipe is DCP */
792 if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
793 dev_err(dev, "1st PIPE is not DCP\n");
794 return -EINVAL;
795 }
796
797 info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
798 if (!info->pipe) {
799 dev_err(dev, "Could not allocate pipe\n");
800 return -ENOMEM;
801 }
802
803 info->size = pipe_size;
804
805 /*
806 * init pipe
807 */
808 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
809 pipe->priv = priv;
810
811 usbhs_pipe_type(pipe) =
812 pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;
813
814 dev_dbg(dev, "pipe %x\t: %s\n",
815 i, usbhsp_pipe_name[pipe_type[i]]);
816 }
817
818 return 0;
819}
820
821void usbhs_pipe_remove(struct usbhs_priv *priv)
822{
823 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
824
825 kfree(info->pipe);
826}