1 /*
2 * Renesas USB driver
3 *
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
15 *
16 */
17 #include <linux/delay.h>
18 #include <linux/slab.h>
19 #include "common.h"
20 #include "pipe.h"
21
22 /*
23 * macros
24 */
25 #define usbhsp_addr_offset(p) ((usbhs_pipe_number(p) - 1) * 2)
26
27 #define usbhsp_flags_set(p, f) ((p)->flags |= USBHS_PIPE_FLAGS_##f)
28 #define usbhsp_flags_clr(p, f) ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
29 #define usbhsp_flags_has(p, f) ((p)->flags & USBHS_PIPE_FLAGS_##f)
30 #define usbhsp_flags_init(p) do {(p)->flags = 0; } while (0)
31
32 /*
33 * for debug
34 */
35 static char *usbhsp_pipe_name[] = {
36 [USB_ENDPOINT_XFER_CONTROL] = "DCP",
37 [USB_ENDPOINT_XFER_BULK] = "BULK",
38 [USB_ENDPOINT_XFER_INT] = "INT",
39 [USB_ENDPOINT_XFER_ISOC] = "ISO",
40 };
41
usbhs_pipe_name(struct usbhs_pipe * pipe)42 char *usbhs_pipe_name(struct usbhs_pipe *pipe)
43 {
44 return usbhsp_pipe_name[usbhs_pipe_type(pipe)];
45 }
46
47 static struct renesas_usbhs_driver_pipe_config
usbhsp_get_pipe_config(struct usbhs_priv * priv,int pipe_num)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 */
usbhsp_pipectrl_set(struct usbhs_pipe * pipe,u16 mask,u16 val)59 static 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
usbhsp_pipectrl_get(struct usbhs_pipe * pipe)70 static 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 */
__usbhsp_pipe_xxx_set(struct usbhs_pipe * pipe,u16 dcp_reg,u16 pipe_reg,u16 mask,u16 val)84 static 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
__usbhsp_pipe_xxx_get(struct usbhs_pipe * pipe,u16 dcp_reg,u16 pipe_reg)96 static 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 */
usbhsp_pipe_cfg_set(struct usbhs_pipe * pipe,u16 mask,u16 val)110 static 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
usbhsp_pipe_cfg_get(struct usbhs_pipe * pipe)115 static 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 */
usbhsp_pipe_trn_set(struct usbhs_pipe * pipe,u16 mask,u16 val)123 static 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
usbhsp_pipe_tre_set(struct usbhs_pipe * pipe,u16 mask,u16 val)159 static 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 */
usbhsp_pipe_buf_set(struct usbhs_pipe * pipe,u16 mask,u16 val)199 static 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 */
usbhsp_pipe_maxp_set(struct usbhs_pipe * pipe,u16 mask,u16 val)210 static 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 */
usbhsp_pipe_select(struct usbhs_pipe * pipe)218 static 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
usbhsp_pipe_barrier(struct usbhs_pipe * pipe)240 static 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
usbhs_pipe_is_accessible(struct usbhs_pipe * pipe)278 int 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
usbhs_pipe_contains_transmittable_data(struct usbhs_pipe * pipe)289 bool usbhs_pipe_contains_transmittable_data(struct usbhs_pipe *pipe)
290 {
291 u16 val;
292
293 /* Do not support for DCP pipe */
294 if (usbhs_pipe_is_dcp(pipe))
295 return false;
296
297 val = usbhsp_pipectrl_get(pipe);
298 if (val & INBUFM)
299 return true;
300
301 return false;
302 }
303
304 /*
305 * PID ctrl
306 */
__usbhsp_pid_try_nak_if_stall(struct usbhs_pipe * pipe)307 static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
308 {
309 u16 pid = usbhsp_pipectrl_get(pipe);
310
311 pid &= PID_MASK;
312
313 /*
314 * see
315 * "Pipe n Control Register" - "PID"
316 */
317 switch (pid) {
318 case PID_STALL11:
319 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
320 /* fall-through */
321 case PID_STALL10:
322 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
323 }
324 }
325
usbhs_pipe_disable(struct usbhs_pipe * pipe)326 void usbhs_pipe_disable(struct usbhs_pipe *pipe)
327 {
328 int timeout = 1024;
329 u16 val;
330
331 /* see "Pipe n Control Register" - "PID" */
332 __usbhsp_pid_try_nak_if_stall(pipe);
333
334 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
335
336 do {
337 val = usbhsp_pipectrl_get(pipe);
338 val &= PBUSY;
339 if (!val)
340 break;
341
342 udelay(10);
343 } while (timeout--);
344 }
345
usbhs_pipe_enable(struct usbhs_pipe * pipe)346 void usbhs_pipe_enable(struct usbhs_pipe *pipe)
347 {
348 /* see "Pipe n Control Register" - "PID" */
349 __usbhsp_pid_try_nak_if_stall(pipe);
350
351 usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
352 }
353
usbhs_pipe_stall(struct usbhs_pipe * pipe)354 void usbhs_pipe_stall(struct usbhs_pipe *pipe)
355 {
356 u16 pid = usbhsp_pipectrl_get(pipe);
357
358 pid &= PID_MASK;
359
360 /*
361 * see
362 * "Pipe n Control Register" - "PID"
363 */
364 switch (pid) {
365 case PID_NAK:
366 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
367 break;
368 case PID_BUF:
369 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
370 break;
371 }
372 }
373
usbhs_pipe_is_stall(struct usbhs_pipe * pipe)374 int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
375 {
376 u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
377
378 return (int)(pid == PID_STALL10 || pid == PID_STALL11);
379 }
380
usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe * pipe,int len)381 void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
382 {
383 if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
384 return;
385
386 /*
387 * clear and disable transfer counter for IN/OUT pipe
388 */
389 usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
390
391 /*
392 * Only IN direction bulk pipe can use transfer count.
393 * Without using this function,
394 * received data will break if it was large data size.
395 * see PIPEnTRN/PIPEnTRE for detail
396 */
397 if (usbhs_pipe_is_dir_in(pipe)) {
398 int maxp = usbhs_pipe_get_maxpacket(pipe);
399
400 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
401 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
402 }
403 }
404
405
406 /*
407 * pipe setup
408 */
usbhsp_setup_pipecfg(struct usbhs_pipe * pipe,int is_host,int dir_in,u16 * pipecfg)409 static int usbhsp_setup_pipecfg(struct usbhs_pipe *pipe, int is_host,
410 int dir_in, u16 *pipecfg)
411 {
412 u16 type = 0;
413 u16 bfre = 0;
414 u16 dblb = 0;
415 u16 cntmd = 0;
416 u16 dir = 0;
417 u16 epnum = 0;
418 u16 shtnak = 0;
419 static const u16 type_array[] = {
420 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
421 [USB_ENDPOINT_XFER_INT] = TYPE_INT,
422 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
423 };
424
425 if (usbhs_pipe_is_dcp(pipe))
426 return -EINVAL;
427
428 /*
429 * PIPECFG
430 *
431 * see
432 * - "Register Descriptions" - "PIPECFG" register
433 * - "Features" - "Pipe configuration"
434 * - "Operation" - "Pipe Control"
435 */
436
437 /* TYPE */
438 type = type_array[usbhs_pipe_type(pipe)];
439
440 /* BFRE */
441 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
442 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
443 bfre = 0; /* FIXME */
444
445 /* DBLB: see usbhs_pipe_config_update() */
446
447 /* CNTMD */
448 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
449 cntmd = 0; /* FIXME */
450
451 /* DIR */
452 if (dir_in)
453 usbhsp_flags_set(pipe, IS_DIR_HOST);
454
455 if (!!is_host ^ !!dir_in)
456 dir |= DIR_OUT;
457
458 if (!dir)
459 usbhsp_flags_set(pipe, IS_DIR_IN);
460
461 /* SHTNAK */
462 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
463 !dir)
464 shtnak = SHTNAK;
465
466 /* EPNUM */
467 epnum = 0; /* see usbhs_pipe_config_update() */
468 *pipecfg = type |
469 bfre |
470 dblb |
471 cntmd |
472 dir |
473 shtnak |
474 epnum;
475 return 0;
476 }
477
usbhsp_setup_pipebuff(struct usbhs_pipe * pipe)478 static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
479 {
480 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
481 struct device *dev = usbhs_priv_to_dev(priv);
482 int pipe_num = usbhs_pipe_number(pipe);
483 u16 buff_size;
484 u16 bufnmb;
485 u16 bufnmb_cnt;
486 struct renesas_usbhs_driver_pipe_config *pipe_config =
487 usbhsp_get_pipe_config(priv, pipe_num);
488
489 /*
490 * PIPEBUF
491 *
492 * see
493 * - "Register Descriptions" - "PIPEBUF" register
494 * - "Features" - "Pipe configuration"
495 * - "Operation" - "FIFO Buffer Memory"
496 * - "Operation" - "Pipe Control"
497 */
498 buff_size = pipe_config->bufsize;
499 bufnmb = pipe_config->bufnum;
500
501 /* change buff_size to register value */
502 bufnmb_cnt = (buff_size / 64) - 1;
503
504 dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
505 pipe_num, buff_size, bufnmb);
506
507 return (0x1f & bufnmb_cnt) << 10 |
508 (0xff & bufnmb) << 0;
509 }
510
usbhs_pipe_config_update(struct usbhs_pipe * pipe,u16 devsel,u16 epnum,u16 maxp)511 void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
512 u16 epnum, u16 maxp)
513 {
514 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
515 int pipe_num = usbhs_pipe_number(pipe);
516 struct renesas_usbhs_driver_pipe_config *pipe_config =
517 usbhsp_get_pipe_config(priv, pipe_num);
518 u16 dblb = pipe_config->double_buf ? DBLB : 0;
519
520 if (devsel > 0xA) {
521 struct device *dev = usbhs_priv_to_dev(priv);
522
523 dev_err(dev, "devsel error %d\n", devsel);
524
525 devsel = 0;
526 }
527
528 usbhsp_pipe_barrier(pipe);
529
530 pipe->maxp = maxp;
531
532 usbhsp_pipe_select(pipe);
533 usbhsp_pipe_maxp_set(pipe, 0xFFFF,
534 (devsel << 12) |
535 maxp);
536
537 if (!usbhs_pipe_is_dcp(pipe))
538 usbhsp_pipe_cfg_set(pipe, 0x000F | DBLB, epnum | dblb);
539 }
540
541 /*
542 * pipe control
543 */
usbhs_pipe_get_maxpacket(struct usbhs_pipe * pipe)544 int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
545 {
546 /*
547 * see
548 * usbhs_pipe_config_update()
549 * usbhs_dcp_malloc()
550 */
551 return pipe->maxp;
552 }
553
usbhs_pipe_is_dir_in(struct usbhs_pipe * pipe)554 int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
555 {
556 return usbhsp_flags_has(pipe, IS_DIR_IN);
557 }
558
usbhs_pipe_is_dir_host(struct usbhs_pipe * pipe)559 int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
560 {
561 return usbhsp_flags_has(pipe, IS_DIR_HOST);
562 }
563
usbhs_pipe_is_running(struct usbhs_pipe * pipe)564 int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
565 {
566 return usbhsp_flags_has(pipe, IS_RUNNING);
567 }
568
usbhs_pipe_running(struct usbhs_pipe * pipe,int running)569 void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
570 {
571 if (running)
572 usbhsp_flags_set(pipe, IS_RUNNING);
573 else
574 usbhsp_flags_clr(pipe, IS_RUNNING);
575 }
576
usbhs_pipe_data_sequence(struct usbhs_pipe * pipe,int sequence)577 void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
578 {
579 u16 mask = (SQCLR | SQSET);
580 u16 val;
581
582 /*
583 * sequence
584 * 0 : data0
585 * 1 : data1
586 * -1 : no change
587 */
588 switch (sequence) {
589 case 0:
590 val = SQCLR;
591 break;
592 case 1:
593 val = SQSET;
594 break;
595 default:
596 return;
597 }
598
599 usbhsp_pipectrl_set(pipe, mask, val);
600 }
601
usbhs_pipe_get_data_sequence(struct usbhs_pipe * pipe)602 static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
603 {
604 return !!(usbhsp_pipectrl_get(pipe) & SQMON);
605 }
606
usbhs_pipe_clear(struct usbhs_pipe * pipe)607 void usbhs_pipe_clear(struct usbhs_pipe *pipe)
608 {
609 if (usbhs_pipe_is_dcp(pipe)) {
610 usbhs_fifo_clear_dcp(pipe);
611 } else {
612 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
613 usbhsp_pipectrl_set(pipe, ACLRM, 0);
614 }
615 }
616
usbhs_pipe_config_change_bfre(struct usbhs_pipe * pipe,int enable)617 void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
618 {
619 int sequence;
620
621 if (usbhs_pipe_is_dcp(pipe))
622 return;
623
624 usbhsp_pipe_select(pipe);
625 /* check if the driver needs to change the BFRE value */
626 if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
627 return;
628
629 sequence = usbhs_pipe_get_data_sequence(pipe);
630 usbhsp_pipe_cfg_set(pipe, BFRE, enable ? BFRE : 0);
631 usbhs_pipe_clear(pipe);
632 usbhs_pipe_data_sequence(pipe, sequence);
633 }
634
usbhsp_get_pipe(struct usbhs_priv * priv,u32 type)635 static 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
usbhsp_put_pipe(struct usbhs_pipe * pipe)666 static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
667 {
668 usbhsp_flags_init(pipe);
669 }
670
usbhs_pipe_init(struct usbhs_priv * priv,int (* dma_map_ctrl)(struct device * dma_dev,struct usbhs_pkt * pkt,int map))671 void 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
usbhs_pipe_malloc(struct usbhs_priv * priv,int endpoint_type,int dir_in)692 struct 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
usbhs_pipe_free(struct usbhs_pipe * pipe)747 void usbhs_pipe_free(struct usbhs_pipe *pipe)
748 {
749 usbhsp_put_pipe(pipe);
750 }
751
usbhs_pipe_select_fifo(struct usbhs_pipe * pipe,struct usbhs_fifo * fifo)752 void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
753 {
754 if (pipe->fifo)
755 pipe->fifo->pipe = NULL;
756
757 pipe->fifo = fifo;
758
759 if (fifo)
760 fifo->pipe = pipe;
761 }
762
763
764 /*
765 * dcp control
766 */
usbhs_dcp_malloc(struct usbhs_priv * priv)767 struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
768 {
769 struct usbhs_pipe *pipe;
770
771 pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
772 if (!pipe)
773 return NULL;
774
775 INIT_LIST_HEAD(&pipe->list);
776
777 /*
778 * call usbhs_pipe_config_update() after this function !!
779 */
780
781 return pipe;
782 }
783
usbhs_dcp_control_transfer_done(struct usbhs_pipe * pipe)784 void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
785 {
786 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
787
788 WARN_ON(!usbhs_pipe_is_dcp(pipe));
789
790 usbhs_pipe_enable(pipe);
791
792 if (!usbhs_mod_is_host(priv)) /* funconly */
793 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
794 }
795
usbhs_dcp_dir_for_host(struct usbhs_pipe * pipe,int dir_out)796 void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
797 {
798 usbhsp_pipe_cfg_set(pipe, DIR_OUT,
799 dir_out ? DIR_OUT : 0);
800 }
801
802 /*
803 * pipe module function
804 */
usbhs_pipe_probe(struct usbhs_priv * priv)805 int usbhs_pipe_probe(struct usbhs_priv *priv)
806 {
807 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
808 struct usbhs_pipe *pipe;
809 struct device *dev = usbhs_priv_to_dev(priv);
810 struct renesas_usbhs_driver_pipe_config *pipe_configs =
811 usbhs_get_dparam(priv, pipe_configs);
812 int pipe_size = usbhs_get_dparam(priv, pipe_size);
813 int i;
814
815 /* This driver expects 1st pipe is DCP */
816 if (pipe_configs[0].type != USB_ENDPOINT_XFER_CONTROL) {
817 dev_err(dev, "1st PIPE is not DCP\n");
818 return -EINVAL;
819 }
820
821 info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
822 if (!info->pipe)
823 return -ENOMEM;
824
825 info->size = pipe_size;
826
827 /*
828 * init pipe
829 */
830 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
831 pipe->priv = priv;
832
833 usbhs_pipe_type(pipe) =
834 pipe_configs[i].type & USB_ENDPOINT_XFERTYPE_MASK;
835
836 dev_dbg(dev, "pipe %x\t: %s\n",
837 i, usbhsp_pipe_name[pipe_configs[i].type]);
838 }
839
840 return 0;
841 }
842
usbhs_pipe_remove(struct usbhs_priv * priv)843 void usbhs_pipe_remove(struct usbhs_priv *priv)
844 {
845 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
846
847 kfree(info->pipe);
848 }
849