1 // SPDX-License-Identifier: GPL-1.0+
2 /*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 */
8 #include <linux/delay.h>
9 #include <linux/slab.h>
10 #include "common.h"
11 #include "pipe.h"
12
13 /*
14 * macros
15 */
16 #define usbhsp_addr_offset(p) ((usbhs_pipe_number(p) - 1) * 2)
17
18 #define usbhsp_flags_set(p, f) ((p)->flags |= USBHS_PIPE_FLAGS_##f)
19 #define usbhsp_flags_clr(p, f) ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
20 #define usbhsp_flags_has(p, f) ((p)->flags & USBHS_PIPE_FLAGS_##f)
21 #define usbhsp_flags_init(p) do {(p)->flags = 0; } while (0)
22
23 /*
24 * for debug
25 */
26 static char *usbhsp_pipe_name[] = {
27 [USB_ENDPOINT_XFER_CONTROL] = "DCP",
28 [USB_ENDPOINT_XFER_BULK] = "BULK",
29 [USB_ENDPOINT_XFER_INT] = "INT",
30 [USB_ENDPOINT_XFER_ISOC] = "ISO",
31 };
32
usbhs_pipe_name(struct usbhs_pipe * pipe)33 char *usbhs_pipe_name(struct usbhs_pipe *pipe)
34 {
35 return usbhsp_pipe_name[usbhs_pipe_type(pipe)];
36 }
37
38 static struct renesas_usbhs_driver_pipe_config
usbhsp_get_pipe_config(struct usbhs_priv * priv,int pipe_num)39 *usbhsp_get_pipe_config(struct usbhs_priv *priv, int pipe_num)
40 {
41 struct renesas_usbhs_driver_pipe_config *pipe_configs =
42 usbhs_get_dparam(priv, pipe_configs);
43
44 return &pipe_configs[pipe_num];
45 }
46
47 /*
48 * DCPCTR/PIPEnCTR functions
49 */
usbhsp_pipectrl_set(struct usbhs_pipe * pipe,u16 mask,u16 val)50 static 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
usbhsp_pipectrl_get(struct usbhs_pipe * pipe)61 static 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 */
__usbhsp_pipe_xxx_set(struct usbhs_pipe * pipe,u16 dcp_reg,u16 pipe_reg,u16 mask,u16 val)75 static 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
__usbhsp_pipe_xxx_get(struct usbhs_pipe * pipe,u16 dcp_reg,u16 pipe_reg)87 static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
88 u16 dcp_reg, u16 pipe_reg)
89 {
90 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
91
92 if (usbhs_pipe_is_dcp(pipe))
93 return usbhs_read(priv, dcp_reg);
94 else
95 return usbhs_read(priv, pipe_reg);
96 }
97
98 /*
99 * DCPCFG/PIPECFG functions
100 */
usbhsp_pipe_cfg_set(struct usbhs_pipe * pipe,u16 mask,u16 val)101 static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
102 {
103 __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
104 }
105
usbhsp_pipe_cfg_get(struct usbhs_pipe * pipe)106 static u16 usbhsp_pipe_cfg_get(struct usbhs_pipe *pipe)
107 {
108 return __usbhsp_pipe_xxx_get(pipe, DCPCFG, PIPECFG);
109 }
110
111 /*
112 * PIPEnTRN/PIPEnTRE functions
113 */
usbhsp_pipe_trn_set(struct usbhs_pipe * pipe,u16 mask,u16 val)114 static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
115 {
116 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
117 struct device *dev = usbhs_priv_to_dev(priv);
118 int num = usbhs_pipe_number(pipe);
119 u16 reg;
120
121 /*
122 * It is impossible to calculate address,
123 * since PIPEnTRN addresses were mapped randomly.
124 */
125 #define CASE_PIPExTRN(a) \
126 case 0x ## a: \
127 reg = PIPE ## a ## TRN; \
128 break;
129
130 switch (num) {
131 CASE_PIPExTRN(1);
132 CASE_PIPExTRN(2);
133 CASE_PIPExTRN(3);
134 CASE_PIPExTRN(4);
135 CASE_PIPExTRN(5);
136 CASE_PIPExTRN(B);
137 CASE_PIPExTRN(C);
138 CASE_PIPExTRN(D);
139 CASE_PIPExTRN(E);
140 CASE_PIPExTRN(F);
141 CASE_PIPExTRN(9);
142 CASE_PIPExTRN(A);
143 default:
144 dev_err(dev, "unknown pipe (%d)\n", num);
145 return;
146 }
147 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
148 }
149
usbhsp_pipe_tre_set(struct usbhs_pipe * pipe,u16 mask,u16 val)150 static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
151 {
152 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
153 struct device *dev = usbhs_priv_to_dev(priv);
154 int num = usbhs_pipe_number(pipe);
155 u16 reg;
156
157 /*
158 * It is impossible to calculate address,
159 * since PIPEnTRE addresses were mapped randomly.
160 */
161 #define CASE_PIPExTRE(a) \
162 case 0x ## a: \
163 reg = PIPE ## a ## TRE; \
164 break;
165
166 switch (num) {
167 CASE_PIPExTRE(1);
168 CASE_PIPExTRE(2);
169 CASE_PIPExTRE(3);
170 CASE_PIPExTRE(4);
171 CASE_PIPExTRE(5);
172 CASE_PIPExTRE(B);
173 CASE_PIPExTRE(C);
174 CASE_PIPExTRE(D);
175 CASE_PIPExTRE(E);
176 CASE_PIPExTRE(F);
177 CASE_PIPExTRE(9);
178 CASE_PIPExTRE(A);
179 default:
180 dev_err(dev, "unknown pipe (%d)\n", num);
181 return;
182 }
183
184 __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
185 }
186
187 /*
188 * PIPEBUF
189 */
usbhsp_pipe_buf_set(struct usbhs_pipe * pipe,u16 mask,u16 val)190 static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
191 {
192 if (usbhs_pipe_is_dcp(pipe))
193 return;
194
195 __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
196 }
197
198 /*
199 * DCPMAXP/PIPEMAXP
200 */
usbhsp_pipe_maxp_set(struct usbhs_pipe * pipe,u16 mask,u16 val)201 static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
202 {
203 __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
204 }
205
206 /*
207 * pipe control functions
208 */
usbhsp_pipe_select(struct usbhs_pipe * pipe)209 static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
210 {
211 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
212
213 /*
214 * On pipe, this is necessary before
215 * accesses to below registers.
216 *
217 * PIPESEL : usbhsp_pipe_select
218 * PIPECFG : usbhsp_pipe_cfg_xxx
219 * PIPEBUF : usbhsp_pipe_buf_xxx
220 * PIPEMAXP : usbhsp_pipe_maxp_xxx
221 * PIPEPERI
222 */
223
224 /*
225 * if pipe is dcp, no pipe is selected.
226 * it is no problem, because dcp have its register
227 */
228 usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
229 }
230
usbhsp_pipe_barrier(struct usbhs_pipe * pipe)231 static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
232 {
233 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
234 int timeout = 1024;
235 u16 mask = usbhs_mod_is_host(priv) ? (CSSTS | PID_MASK) : PID_MASK;
236
237 /*
238 * make sure....
239 *
240 * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
241 * specified by the CURPIPE bits.
242 * When changing the setting of this bit after changing
243 * the PID bits for the selected pipe from BUF to NAK,
244 * check that CSSTS = 0 and PBUSY = 0.
245 */
246
247 /*
248 * CURPIPE bit = 0
249 *
250 * see also
251 * "Operation"
252 * - "Pipe Control"
253 * - "Pipe Control Registers Switching Procedure"
254 */
255 usbhs_write(priv, CFIFOSEL, 0);
256 usbhs_pipe_disable(pipe);
257
258 do {
259 if (!(usbhsp_pipectrl_get(pipe) & mask))
260 return 0;
261
262 udelay(10);
263
264 } while (timeout--);
265
266 return -EBUSY;
267 }
268
usbhs_pipe_is_accessible(struct usbhs_pipe * pipe)269 int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
270 {
271 u16 val;
272
273 val = usbhsp_pipectrl_get(pipe);
274 if (val & BSTS)
275 return 0;
276
277 return -EBUSY;
278 }
279
usbhs_pipe_contains_transmittable_data(struct usbhs_pipe * pipe)280 bool usbhs_pipe_contains_transmittable_data(struct usbhs_pipe *pipe)
281 {
282 u16 val;
283
284 /* Do not support for DCP pipe */
285 if (usbhs_pipe_is_dcp(pipe))
286 return false;
287
288 val = usbhsp_pipectrl_get(pipe);
289 if (val & INBUFM)
290 return true;
291
292 return false;
293 }
294
295 /*
296 * PID ctrl
297 */
__usbhsp_pid_try_nak_if_stall(struct usbhs_pipe * pipe)298 static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
299 {
300 u16 pid = usbhsp_pipectrl_get(pipe);
301
302 pid &= PID_MASK;
303
304 /*
305 * see
306 * "Pipe n Control Register" - "PID"
307 */
308 switch (pid) {
309 case PID_STALL11:
310 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
311 fallthrough;
312 case PID_STALL10:
313 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
314 }
315 }
316
usbhs_pipe_disable(struct usbhs_pipe * pipe)317 void usbhs_pipe_disable(struct usbhs_pipe *pipe)
318 {
319 int timeout = 1024;
320 u16 val;
321
322 /* see "Pipe n Control Register" - "PID" */
323 __usbhsp_pid_try_nak_if_stall(pipe);
324
325 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
326
327 do {
328 val = usbhsp_pipectrl_get(pipe);
329 val &= PBUSY;
330 if (!val)
331 break;
332
333 udelay(10);
334 } while (timeout--);
335 }
336
usbhs_pipe_enable(struct usbhs_pipe * pipe)337 void usbhs_pipe_enable(struct usbhs_pipe *pipe)
338 {
339 /* see "Pipe n Control Register" - "PID" */
340 __usbhsp_pid_try_nak_if_stall(pipe);
341
342 usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
343 }
344
usbhs_pipe_stall(struct usbhs_pipe * pipe)345 void usbhs_pipe_stall(struct usbhs_pipe *pipe)
346 {
347 u16 pid = usbhsp_pipectrl_get(pipe);
348
349 pid &= PID_MASK;
350
351 /*
352 * see
353 * "Pipe n Control Register" - "PID"
354 */
355 switch (pid) {
356 case PID_NAK:
357 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
358 break;
359 case PID_BUF:
360 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
361 break;
362 }
363 }
364
usbhs_pipe_is_stall(struct usbhs_pipe * pipe)365 int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
366 {
367 u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
368
369 return (int)(pid == PID_STALL10 || pid == PID_STALL11);
370 }
371
usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe * pipe,int len)372 void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
373 {
374 if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
375 return;
376
377 /*
378 * clear and disable transfer counter for IN/OUT pipe
379 */
380 usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
381
382 /*
383 * Only IN direction bulk pipe can use transfer count.
384 * Without using this function,
385 * received data will break if it was large data size.
386 * see PIPEnTRN/PIPEnTRE for detail
387 */
388 if (usbhs_pipe_is_dir_in(pipe)) {
389 int maxp = usbhs_pipe_get_maxpacket(pipe);
390
391 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
392 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
393 }
394 }
395
396
397 /*
398 * pipe setup
399 */
usbhsp_setup_pipecfg(struct usbhs_pipe * pipe,int is_host,int dir_in,u16 * pipecfg)400 static int usbhsp_setup_pipecfg(struct usbhs_pipe *pipe, int is_host,
401 int dir_in, u16 *pipecfg)
402 {
403 u16 type = 0;
404 u16 bfre = 0;
405 u16 dblb = 0;
406 u16 cntmd = 0;
407 u16 dir = 0;
408 u16 epnum = 0;
409 u16 shtnak = 0;
410 static const u16 type_array[] = {
411 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
412 [USB_ENDPOINT_XFER_INT] = TYPE_INT,
413 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
414 };
415
416 if (usbhs_pipe_is_dcp(pipe))
417 return -EINVAL;
418
419 /*
420 * PIPECFG
421 *
422 * see
423 * - "Register Descriptions" - "PIPECFG" register
424 * - "Features" - "Pipe configuration"
425 * - "Operation" - "Pipe Control"
426 */
427
428 /* TYPE */
429 type = type_array[usbhs_pipe_type(pipe)];
430
431 /* BFRE */
432 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
433 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
434 bfre = 0; /* FIXME */
435
436 /* DBLB: see usbhs_pipe_config_update() */
437
438 /* CNTMD */
439 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
440 cntmd = 0; /* FIXME */
441
442 /* DIR */
443 if (dir_in)
444 usbhsp_flags_set(pipe, IS_DIR_HOST);
445
446 if (!!is_host ^ !!dir_in)
447 dir |= DIR_OUT;
448
449 if (!dir)
450 usbhsp_flags_set(pipe, IS_DIR_IN);
451
452 /* SHTNAK */
453 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
454 !dir)
455 shtnak = SHTNAK;
456
457 /* EPNUM */
458 epnum = 0; /* see usbhs_pipe_config_update() */
459 *pipecfg = type |
460 bfre |
461 dblb |
462 cntmd |
463 dir |
464 shtnak |
465 epnum;
466 return 0;
467 }
468
usbhsp_setup_pipebuff(struct usbhs_pipe * pipe)469 static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
470 {
471 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
472 struct device *dev = usbhs_priv_to_dev(priv);
473 int pipe_num = usbhs_pipe_number(pipe);
474 u16 buff_size;
475 u16 bufnmb;
476 u16 bufnmb_cnt;
477 struct renesas_usbhs_driver_pipe_config *pipe_config =
478 usbhsp_get_pipe_config(priv, pipe_num);
479
480 /*
481 * PIPEBUF
482 *
483 * see
484 * - "Register Descriptions" - "PIPEBUF" register
485 * - "Features" - "Pipe configuration"
486 * - "Operation" - "FIFO Buffer Memory"
487 * - "Operation" - "Pipe Control"
488 */
489 buff_size = pipe_config->bufsize;
490 bufnmb = pipe_config->bufnum;
491
492 /* change buff_size to register value */
493 bufnmb_cnt = (buff_size / 64) - 1;
494
495 dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
496 pipe_num, buff_size, bufnmb);
497
498 return (0x1f & bufnmb_cnt) << 10 |
499 (0xff & bufnmb) << 0;
500 }
501
usbhs_pipe_config_update(struct usbhs_pipe * pipe,u16 devsel,u16 epnum,u16 maxp)502 void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
503 u16 epnum, u16 maxp)
504 {
505 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
506 int pipe_num = usbhs_pipe_number(pipe);
507 struct renesas_usbhs_driver_pipe_config *pipe_config =
508 usbhsp_get_pipe_config(priv, pipe_num);
509 u16 dblb = pipe_config->double_buf ? DBLB : 0;
510
511 if (devsel > 0xA) {
512 struct device *dev = usbhs_priv_to_dev(priv);
513
514 dev_err(dev, "devsel error %d\n", devsel);
515
516 devsel = 0;
517 }
518
519 usbhsp_pipe_barrier(pipe);
520
521 pipe->maxp = maxp;
522
523 usbhsp_pipe_select(pipe);
524 usbhsp_pipe_maxp_set(pipe, 0xFFFF,
525 (devsel << 12) |
526 maxp);
527
528 if (!usbhs_pipe_is_dcp(pipe))
529 usbhsp_pipe_cfg_set(pipe, 0x000F | DBLB, epnum | dblb);
530 }
531
532 /*
533 * pipe control
534 */
usbhs_pipe_get_maxpacket(struct usbhs_pipe * pipe)535 int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
536 {
537 /*
538 * see
539 * usbhs_pipe_config_update()
540 * usbhs_dcp_malloc()
541 */
542 return pipe->maxp;
543 }
544
usbhs_pipe_is_dir_in(struct usbhs_pipe * pipe)545 int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
546 {
547 return usbhsp_flags_has(pipe, IS_DIR_IN);
548 }
549
usbhs_pipe_is_dir_host(struct usbhs_pipe * pipe)550 int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
551 {
552 return usbhsp_flags_has(pipe, IS_DIR_HOST);
553 }
554
usbhs_pipe_is_running(struct usbhs_pipe * pipe)555 int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
556 {
557 return usbhsp_flags_has(pipe, IS_RUNNING);
558 }
559
usbhs_pipe_running(struct usbhs_pipe * pipe,int running)560 void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
561 {
562 if (running)
563 usbhsp_flags_set(pipe, IS_RUNNING);
564 else
565 usbhsp_flags_clr(pipe, IS_RUNNING);
566 }
567
usbhs_pipe_data_sequence(struct usbhs_pipe * pipe,int sequence)568 void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
569 {
570 u16 mask = (SQCLR | SQSET);
571 u16 val;
572
573 /*
574 * sequence
575 * 0 : data0
576 * 1 : data1
577 * -1 : no change
578 */
579 switch (sequence) {
580 case 0:
581 val = SQCLR;
582 break;
583 case 1:
584 val = SQSET;
585 break;
586 default:
587 return;
588 }
589
590 usbhsp_pipectrl_set(pipe, mask, val);
591 }
592
usbhs_pipe_get_data_sequence(struct usbhs_pipe * pipe)593 static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
594 {
595 return !!(usbhsp_pipectrl_get(pipe) & SQMON);
596 }
597
usbhs_pipe_clear(struct usbhs_pipe * pipe)598 void usbhs_pipe_clear(struct usbhs_pipe *pipe)
599 {
600 if (usbhs_pipe_is_dcp(pipe)) {
601 usbhs_fifo_clear_dcp(pipe);
602 } else {
603 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
604 usbhsp_pipectrl_set(pipe, ACLRM, 0);
605 }
606 }
607
608 /* Should call usbhsp_pipe_select() before */
usbhs_pipe_clear_without_sequence(struct usbhs_pipe * pipe,int needs_bfre,int bfre_enable)609 void usbhs_pipe_clear_without_sequence(struct usbhs_pipe *pipe,
610 int needs_bfre, int bfre_enable)
611 {
612 int sequence;
613
614 usbhsp_pipe_select(pipe);
615 sequence = usbhs_pipe_get_data_sequence(pipe);
616 if (needs_bfre)
617 usbhsp_pipe_cfg_set(pipe, BFRE, bfre_enable ? BFRE : 0);
618 usbhs_pipe_clear(pipe);
619 usbhs_pipe_data_sequence(pipe, sequence);
620 }
621
usbhs_pipe_config_change_bfre(struct usbhs_pipe * pipe,int enable)622 void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
623 {
624 if (usbhs_pipe_is_dcp(pipe))
625 return;
626
627 usbhsp_pipe_select(pipe);
628 /* check if the driver needs to change the BFRE value */
629 if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
630 return;
631
632 usbhs_pipe_clear_without_sequence(pipe, 1, enable);
633 }
634
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_pipe_select(pipe);
750 usbhsp_pipe_cfg_set(pipe, 0xFFFF, 0);
751 usbhsp_put_pipe(pipe);
752 }
753
usbhs_pipe_select_fifo(struct usbhs_pipe * pipe,struct usbhs_fifo * fifo)754 void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
755 {
756 if (pipe->fifo)
757 pipe->fifo->pipe = NULL;
758
759 pipe->fifo = fifo;
760
761 if (fifo)
762 fifo->pipe = pipe;
763 }
764
765
766 /*
767 * dcp control
768 */
usbhs_dcp_malloc(struct usbhs_priv * priv)769 struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
770 {
771 struct usbhs_pipe *pipe;
772
773 pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
774 if (!pipe)
775 return NULL;
776
777 INIT_LIST_HEAD(&pipe->list);
778
779 /*
780 * call usbhs_pipe_config_update() after this function !!
781 */
782
783 return pipe;
784 }
785
usbhs_dcp_control_transfer_done(struct usbhs_pipe * pipe)786 void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
787 {
788 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
789
790 WARN_ON(!usbhs_pipe_is_dcp(pipe));
791
792 usbhs_pipe_enable(pipe);
793
794 if (!usbhs_mod_is_host(priv)) /* funconly */
795 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
796 }
797
usbhs_dcp_dir_for_host(struct usbhs_pipe * pipe,int dir_out)798 void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
799 {
800 usbhsp_pipe_cfg_set(pipe, DIR_OUT,
801 dir_out ? DIR_OUT : 0);
802 }
803
804 /*
805 * pipe module function
806 */
usbhs_pipe_probe(struct usbhs_priv * priv)807 int usbhs_pipe_probe(struct usbhs_priv *priv)
808 {
809 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
810 struct usbhs_pipe *pipe;
811 struct device *dev = usbhs_priv_to_dev(priv);
812 struct renesas_usbhs_driver_pipe_config *pipe_configs =
813 usbhs_get_dparam(priv, pipe_configs);
814 int pipe_size = usbhs_get_dparam(priv, pipe_size);
815 int i;
816
817 /* This driver expects 1st pipe is DCP */
818 if (pipe_configs[0].type != USB_ENDPOINT_XFER_CONTROL) {
819 dev_err(dev, "1st PIPE is not DCP\n");
820 return -EINVAL;
821 }
822
823 info->pipe = kcalloc(pipe_size, sizeof(struct usbhs_pipe),
824 GFP_KERNEL);
825 if (!info->pipe)
826 return -ENOMEM;
827
828 info->size = pipe_size;
829
830 /*
831 * init pipe
832 */
833 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
834 pipe->priv = priv;
835
836 usbhs_pipe_type(pipe) =
837 pipe_configs[i].type & USB_ENDPOINT_XFERTYPE_MASK;
838
839 dev_dbg(dev, "pipe %x\t: %s\n",
840 i, usbhsp_pipe_name[pipe_configs[i].type]);
841 }
842
843 return 0;
844 }
845
usbhs_pipe_remove(struct usbhs_priv * priv)846 void usbhs_pipe_remove(struct usbhs_priv *priv)
847 {
848 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
849
850 kfree(info->pipe);
851 }
852