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Kuninori Morimotoe8d548d2011-06-06 14:18:03 +09001/*
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/io.h>
Rafael J. Wysocki9c646cf2011-07-26 20:51:01 +020019#include <linux/scatterlist.h>
Paul Bollecc502bb2012-06-03 18:39:13 +020020#include "common.h"
21#include "pipe.h"
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +090022
Kuninori Morimotod3af90a2011-06-06 14:18:44 +090023#define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo))
Shimoda, Yoshihiro5ea43992012-01-05 15:37:22 +090024#define usbhsf_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f)
Kuninori Morimotod3af90a2011-06-06 14:18:44 +090025
Kuninori Morimotod77e3f42011-06-06 14:18:50 +090026#define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
27
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +090028/*
Kuninori Morimoto233f5192011-07-07 00:23:24 -070029 * packet initialize
30 */
31void usbhs_pkt_init(struct usbhs_pkt *pkt)
32{
Kuninori Morimoto233f5192011-07-07 00:23:24 -070033 INIT_LIST_HEAD(&pkt->node);
34}
35
36/*
37 * packet control function
Kuninori Morimoto4bd04812011-06-06 14:18:07 +090038 */
Kuninori Morimoto97664a22011-06-06 14:18:38 +090039static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done)
Kuninori Morimotodad67392011-06-06 14:18:28 +090040{
41 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
42 struct device *dev = usbhs_priv_to_dev(priv);
43
44 dev_err(dev, "null handler\n");
45
46 return -EINVAL;
47}
48
Julia Lawallfcb42e22015-12-27 21:50:29 +010049static const struct usbhs_pkt_handle usbhsf_null_handler = {
Kuninori Morimotodad67392011-06-06 14:18:28 +090050 .prepare = usbhsf_null_handle,
51 .try_run = usbhsf_null_handle,
52};
53
Kuninori Morimoto659d4952011-06-06 14:18:23 +090054void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
Kuninori Morimotob3318722011-10-10 22:04:41 -070055 void (*done)(struct usbhs_priv *priv,
56 struct usbhs_pkt *pkt),
Kuninori Morimoto3edeee32011-12-08 18:28:54 -080057 void *buf, int len, int zero, int sequence)
Kuninori Morimoto6acb95d2011-06-06 14:18:16 +090058{
Kuninori Morimotodad67392011-06-06 14:18:28 +090059 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
60 struct device *dev = usbhs_priv_to_dev(priv);
Kuninori Morimoto97664a22011-06-06 14:18:38 +090061 unsigned long flags;
62
Kuninori Morimotob3318722011-10-10 22:04:41 -070063 if (!done) {
64 dev_err(dev, "no done function\n");
65 return;
66 }
67
Kuninori Morimotoa2c76b82011-10-18 20:05:50 -070068 /******************** spin lock ********************/
69 usbhs_lock(priv, flags);
70
Kuninori Morimoto0c6ef982011-10-10 22:00:59 -070071 if (!pipe->handler) {
Kuninori Morimotodad67392011-06-06 14:18:28 +090072 dev_err(dev, "no handler function\n");
Kuninori Morimoto0c6ef982011-10-10 22:00:59 -070073 pipe->handler = &usbhsf_null_handler;
Kuninori Morimotodad67392011-06-06 14:18:28 +090074 }
75
Guennadi Liakhovetskid5261282012-02-14 11:37:17 +010076 list_move_tail(&pkt->node, &pipe->list);
Kuninori Morimoto6acb95d2011-06-06 14:18:16 +090077
Kuninori Morimoto0c6ef982011-10-10 22:00:59 -070078 /*
79 * each pkt must hold own handler.
80 * because handler might be changed by its situation.
81 * dma handler -> pio handler.
82 */
Kuninori Morimoto659d4952011-06-06 14:18:23 +090083 pkt->pipe = pipe;
84 pkt->buf = buf;
Kuninori Morimoto0c6ef982011-10-10 22:00:59 -070085 pkt->handler = pipe->handler;
Kuninori Morimoto659d4952011-06-06 14:18:23 +090086 pkt->length = len;
87 pkt->zero = zero;
88 pkt->actual = 0;
Kuninori Morimotob3318722011-10-10 22:04:41 -070089 pkt->done = done;
Kuninori Morimoto3edeee32011-12-08 18:28:54 -080090 pkt->sequence = sequence;
Kuninori Morimoto97664a22011-06-06 14:18:38 +090091
92 usbhs_unlock(priv, flags);
93 /******************** spin unlock ******************/
Kuninori Morimoto6acb95d2011-06-06 14:18:16 +090094}
95
Kuninori Morimoto97664a22011-06-06 14:18:38 +090096static void __usbhsf_pkt_del(struct usbhs_pkt *pkt)
Kuninori Morimoto6acb95d2011-06-06 14:18:16 +090097{
98 list_del_init(&pkt->node);
99}
100
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900101static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe)
Kuninori Morimoto6acb95d2011-06-06 14:18:16 +0900102{
103 if (list_empty(&pipe->list))
104 return NULL;
105
Guennadi Liakhovetskid5261282012-02-14 11:37:17 +0100106 return list_first_entry(&pipe->list, struct usbhs_pkt, node);
Kuninori Morimoto6acb95d2011-06-06 14:18:16 +0900107}
108
Yoshihiro Shimoda2743e7f2014-08-22 20:14:28 +0900109static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
110 struct usbhs_fifo *fifo);
111static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
112 struct usbhs_fifo *fifo);
113static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
114 struct usbhs_pkt *pkt);
115#define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
116#define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
117static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map);
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900118struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
119{
120 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
Yoshihiro Shimoda2743e7f2014-08-22 20:14:28 +0900121 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900122 unsigned long flags;
123
124 /******************** spin lock ********************/
125 usbhs_lock(priv, flags);
126
Yoshihiro Shimoda2743e7f2014-08-22 20:14:28 +0900127 usbhs_pipe_disable(pipe);
128
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900129 if (!pkt)
130 pkt = __usbhsf_pkt_get(pipe);
131
Yoshihiro Shimoda2743e7f2014-08-22 20:14:28 +0900132 if (pkt) {
133 struct dma_chan *chan = NULL;
134
135 if (fifo)
136 chan = usbhsf_dma_chan_get(fifo, pkt);
137 if (chan) {
138 dmaengine_terminate_all(chan);
139 usbhsf_fifo_clear(pipe, fifo);
140 usbhsf_dma_unmap(pkt);
141 }
142
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900143 __usbhsf_pkt_del(pkt);
Yoshihiro Shimoda2743e7f2014-08-22 20:14:28 +0900144 }
145
146 if (fifo)
147 usbhsf_fifo_unselect(pipe, fifo);
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900148
149 usbhs_unlock(priv, flags);
150 /******************** spin unlock ******************/
151
152 return pkt;
153}
154
Kuninori Morimoto51b8a022011-10-10 21:58:45 -0700155enum {
156 USBHSF_PKT_PREPARE,
157 USBHSF_PKT_TRY_RUN,
158 USBHSF_PKT_DMA_DONE,
159};
160
161static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type)
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900162{
163 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900164 struct usbhs_pkt *pkt;
165 struct device *dev = usbhs_priv_to_dev(priv);
166 int (*func)(struct usbhs_pkt *pkt, int *is_done);
167 unsigned long flags;
168 int ret = 0;
169 int is_done = 0;
170
171 /******************** spin lock ********************/
172 usbhs_lock(priv, flags);
173
174 pkt = __usbhsf_pkt_get(pipe);
175 if (!pkt)
176 goto __usbhs_pkt_handler_end;
177
178 switch (type) {
179 case USBHSF_PKT_PREPARE:
180 func = pkt->handler->prepare;
181 break;
182 case USBHSF_PKT_TRY_RUN:
183 func = pkt->handler->try_run;
184 break;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900185 case USBHSF_PKT_DMA_DONE:
186 func = pkt->handler->dma_done;
187 break;
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900188 default:
Masanari Iida984e8332012-11-01 00:03:51 +0900189 dev_err(dev, "unknown pkt handler\n");
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900190 goto __usbhs_pkt_handler_end;
191 }
192
Yoshihiro Shimoda894f2fc2016-03-10 11:30:14 +0900193 if (likely(func))
194 ret = func(pkt, &is_done);
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900195
196 if (is_done)
197 __usbhsf_pkt_del(pkt);
198
199__usbhs_pkt_handler_end:
200 usbhs_unlock(priv, flags);
201 /******************** spin unlock ******************/
202
Kuninori Morimoto0432eed2011-06-06 14:18:54 +0900203 if (is_done) {
Kuninori Morimotob3318722011-10-10 22:04:41 -0700204 pkt->done(priv, pkt);
Kuninori Morimoto0432eed2011-06-06 14:18:54 +0900205 usbhs_pkt_start(pipe);
206 }
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900207
208 return ret;
209}
210
Kuninori Morimoto51b8a022011-10-10 21:58:45 -0700211void usbhs_pkt_start(struct usbhs_pipe *pipe)
212{
213 usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE);
214}
215
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900216/*
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900217 * irq enable/disable function
218 */
Kuninori Morimoto3192fcb2012-10-29 00:45:07 -0700219#define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_bempsts, e)
220#define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_brdysts, e)
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900221#define usbhsf_irq_callback_ctrl(pipe, status, enable) \
222 ({ \
223 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \
224 struct usbhs_mod *mod = usbhs_mod_get_current(priv); \
225 u16 status = (1 << usbhs_pipe_number(pipe)); \
226 if (!mod) \
227 return; \
228 if (enable) \
Kuninori Morimoto3192fcb2012-10-29 00:45:07 -0700229 mod->status |= status; \
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900230 else \
Kuninori Morimoto3192fcb2012-10-29 00:45:07 -0700231 mod->status &= ~status; \
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900232 usbhs_irq_callback_update(priv, mod); \
233 })
234
235static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
236{
237 /*
238 * And DCP pipe can NOT use "ready interrupt" for "send"
239 * it should use "empty" interrupt.
240 * see
241 * "Operation" - "Interrupt Function" - "BRDY Interrupt"
242 *
243 * on the other hand, normal pipe can use "ready interrupt" for "send"
244 * even though it is single/double buffer
245 */
246 if (usbhs_pipe_is_dcp(pipe))
247 usbhsf_irq_empty_ctrl(pipe, enable);
248 else
249 usbhsf_irq_ready_ctrl(pipe, enable);
250}
251
252static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
253{
254 usbhsf_irq_ready_ctrl(pipe, enable);
255}
256
257/*
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900258 * FIFO ctrl
259 */
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900260static void usbhsf_send_terminator(struct usbhs_pipe *pipe,
261 struct usbhs_fifo *fifo)
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900262{
263 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
264
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900265 usbhs_bset(priv, fifo->ctr, BVAL, BVAL);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900266}
267
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900268static int usbhsf_fifo_barrier(struct usbhs_priv *priv,
269 struct usbhs_fifo *fifo)
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900270{
271 int timeout = 1024;
272
273 do {
274 /* The FIFO port is accessible */
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900275 if (usbhs_read(priv, fifo->ctr) & FRDY)
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900276 return 0;
277
278 udelay(10);
279 } while (timeout--);
280
281 return -EBUSY;
282}
283
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900284static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
285 struct usbhs_fifo *fifo)
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900286{
287 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
288
289 if (!usbhs_pipe_is_dcp(pipe))
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900290 usbhsf_fifo_barrier(priv, fifo);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900291
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900292 usbhs_write(priv, fifo->ctr, BCLR);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900293}
294
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900295static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv,
296 struct usbhs_fifo *fifo)
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900297{
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900298 return usbhs_read(priv, fifo->ctr) & DTLN_MASK;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900299}
300
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900301static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
302 struct usbhs_fifo *fifo)
303{
304 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
305
306 usbhs_pipe_select_fifo(pipe, NULL);
307 usbhs_write(priv, fifo->sel, 0);
308}
309
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900310static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
311 struct usbhs_fifo *fifo,
312 int write)
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900313{
314 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
315 struct device *dev = usbhs_priv_to_dev(priv);
316 int timeout = 1024;
317 u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
318 u16 base = usbhs_pipe_number(pipe); /* CURPIPE */
319
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900320 if (usbhs_pipe_is_busy(pipe) ||
321 usbhsf_fifo_is_busy(fifo))
322 return -EBUSY;
323
Kuninori Morimoto92352072011-10-10 22:02:57 -0700324 if (usbhs_pipe_is_dcp(pipe)) {
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900325 base |= (1 == write) << 5; /* ISEL */
326
Kuninori Morimoto92352072011-10-10 22:02:57 -0700327 if (usbhs_mod_is_host(priv))
328 usbhs_dcp_dir_for_host(pipe, write);
329 }
330
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900331 /* "base" will be used below */
Shimoda, Yoshihiro5ea43992012-01-05 15:37:22 +0900332 if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo))
333 usbhs_write(priv, fifo->sel, base);
334 else
335 usbhs_write(priv, fifo->sel, base | MBW_32);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900336
337 /* check ISEL and CURPIPE value */
338 while (timeout--) {
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900339 if (base == (mask & usbhs_read(priv, fifo->sel))) {
340 usbhs_pipe_select_fifo(pipe, fifo);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900341 return 0;
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900342 }
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900343 udelay(10);
344 }
345
346 dev_err(dev, "fifo select error\n");
347
348 return -EIO;
349}
350
351/*
Kuninori Morimoto9e74d602011-10-10 22:07:08 -0700352 * DCP status stage
353 */
354static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
355{
356 struct usbhs_pipe *pipe = pkt->pipe;
357 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
358 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
359 struct device *dev = usbhs_priv_to_dev(priv);
360 int ret;
361
362 usbhs_pipe_disable(pipe);
363
364 ret = usbhsf_fifo_select(pipe, fifo, 1);
365 if (ret < 0) {
366 dev_err(dev, "%s() faile\n", __func__);
367 return ret;
368 }
369
370 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
371
372 usbhsf_fifo_clear(pipe, fifo);
373 usbhsf_send_terminator(pipe, fifo);
374
375 usbhsf_fifo_unselect(pipe, fifo);
376
377 usbhsf_tx_irq_ctrl(pipe, 1);
378 usbhs_pipe_enable(pipe);
379
380 return ret;
381}
382
383static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done)
384{
385 struct usbhs_pipe *pipe = pkt->pipe;
386 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
387 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
388 struct device *dev = usbhs_priv_to_dev(priv);
389 int ret;
390
391 usbhs_pipe_disable(pipe);
392
393 ret = usbhsf_fifo_select(pipe, fifo, 0);
394 if (ret < 0) {
395 dev_err(dev, "%s() fail\n", __func__);
396 return ret;
397 }
398
399 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
400 usbhsf_fifo_clear(pipe, fifo);
401
402 usbhsf_fifo_unselect(pipe, fifo);
403
404 usbhsf_rx_irq_ctrl(pipe, 1);
405 usbhs_pipe_enable(pipe);
406
407 return ret;
408
409}
410
411static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done)
412{
413 struct usbhs_pipe *pipe = pkt->pipe;
414
415 if (pkt->handler == &usbhs_dcp_status_stage_in_handler)
416 usbhsf_tx_irq_ctrl(pipe, 0);
417 else
418 usbhsf_rx_irq_ctrl(pipe, 0);
419
420 pkt->actual = pkt->length;
421 *is_done = 1;
422
423 return 0;
424}
425
Julia Lawallfcb42e22015-12-27 21:50:29 +0100426const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = {
Kuninori Morimoto9e74d602011-10-10 22:07:08 -0700427 .prepare = usbhs_dcp_dir_switch_to_write,
428 .try_run = usbhs_dcp_dir_switch_done,
429};
430
Julia Lawallfcb42e22015-12-27 21:50:29 +0100431const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = {
Kuninori Morimoto9e74d602011-10-10 22:07:08 -0700432 .prepare = usbhs_dcp_dir_switch_to_read,
433 .try_run = usbhs_dcp_dir_switch_done,
434};
435
436/*
437 * DCP data stage (push)
438 */
439static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done)
440{
441 struct usbhs_pipe *pipe = pkt->pipe;
442
443 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
444
445 /*
446 * change handler to PIO push
447 */
448 pkt->handler = &usbhs_fifo_pio_push_handler;
449
450 return pkt->handler->prepare(pkt, is_done);
451}
452
Julia Lawallfcb42e22015-12-27 21:50:29 +0100453const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = {
Kuninori Morimoto9e74d602011-10-10 22:07:08 -0700454 .prepare = usbhsf_dcp_data_stage_try_push,
455};
456
457/*
458 * DCP data stage (pop)
459 */
460static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt,
461 int *is_done)
462{
463 struct usbhs_pipe *pipe = pkt->pipe;
464 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
465 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
466
467 if (usbhs_pipe_is_busy(pipe))
468 return 0;
469
470 /*
471 * prepare pop for DCP should
472 * - change DCP direction,
473 * - clear fifo
474 * - DATA1
475 */
476 usbhs_pipe_disable(pipe);
477
478 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
479
480 usbhsf_fifo_select(pipe, fifo, 0);
481 usbhsf_fifo_clear(pipe, fifo);
482 usbhsf_fifo_unselect(pipe, fifo);
483
484 /*
485 * change handler to PIO pop
486 */
487 pkt->handler = &usbhs_fifo_pio_pop_handler;
488
489 return pkt->handler->prepare(pkt, is_done);
490}
491
Julia Lawallfcb42e22015-12-27 21:50:29 +0100492const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = {
Kuninori Morimoto9e74d602011-10-10 22:07:08 -0700493 .prepare = usbhsf_dcp_data_stage_prepare_pop,
494};
495
496/*
Kuninori Morimoto233f5192011-07-07 00:23:24 -0700497 * PIO push handler
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900498 */
Kuninori Morimoto0cb7e612011-06-06 14:18:58 +0900499static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900500{
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900501 struct usbhs_pipe *pipe = pkt->pipe;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900502 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900503 struct device *dev = usbhs_priv_to_dev(priv);
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900504 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
505 void __iomem *addr = priv->base + fifo->port;
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900506 u8 *buf;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900507 int maxp = usbhs_pipe_get_maxpacket(pipe);
508 int total_len;
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900509 int i, ret, len;
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900510 int is_short;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900511
Kuninori Morimoto3edeee32011-12-08 18:28:54 -0800512 usbhs_pipe_data_sequence(pipe, pkt->sequence);
513 pkt->sequence = -1; /* -1 sequence will be ignored */
514
Kuninori Morimoto1c90ee02012-11-06 16:15:09 -0800515 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
516
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900517 ret = usbhsf_fifo_select(pipe, fifo, 1);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900518 if (ret < 0)
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900519 return 0;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900520
Kuninori Morimotodad67392011-06-06 14:18:28 +0900521 ret = usbhs_pipe_is_accessible(pipe);
Kuninori Morimoto4ef85e02011-07-03 17:42:47 -0700522 if (ret < 0) {
523 /* inaccessible pipe is not an error */
524 ret = 0;
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900525 goto usbhs_fifo_write_busy;
Kuninori Morimoto4ef85e02011-07-03 17:42:47 -0700526 }
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900527
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900528 ret = usbhsf_fifo_barrier(priv, fifo);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900529 if (ret < 0)
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900530 goto usbhs_fifo_write_busy;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900531
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900532 buf = pkt->buf + pkt->actual;
533 len = pkt->length - pkt->actual;
534 len = min(len, maxp);
535 total_len = len;
536 is_short = total_len < maxp;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900537
538 /*
539 * FIXME
540 *
541 * 32-bit access only
542 */
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900543 if (len >= 4 && !((unsigned long)buf & 0x03)) {
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900544 iowrite32_rep(addr, buf, len / 4);
545 len %= 4;
546 buf += total_len - len;
547 }
548
549 /* the rest operation */
550 for (i = 0; i < len; i++)
551 iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
552
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900553 /*
554 * variable update
555 */
556 pkt->actual += total_len;
557
558 if (pkt->actual < pkt->length)
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900559 *is_done = 0; /* there are remainder data */
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900560 else if (is_short)
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900561 *is_done = 1; /* short packet */
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900562 else
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900563 *is_done = !pkt->zero; /* send zero packet ? */
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900564
565 /*
566 * pipe/irq handling
567 */
568 if (is_short)
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900569 usbhsf_send_terminator(pipe, fifo);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900570
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900571 usbhsf_tx_irq_ctrl(pipe, !*is_done);
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900572 usbhs_pipe_running(pipe, !*is_done);
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900573 usbhs_pipe_enable(pipe);
574
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900575 dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
576 usbhs_pipe_number(pipe),
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900577 pkt->length, pkt->actual, *is_done, pkt->zero);
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900578
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900579 usbhsf_fifo_unselect(pipe, fifo);
580
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900581 return 0;
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900582
583usbhs_fifo_write_busy:
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900584 usbhsf_fifo_unselect(pipe, fifo);
585
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900586 /*
587 * pipe is busy.
588 * retry in interrupt
589 */
590 usbhsf_tx_irq_ctrl(pipe, 1);
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900591 usbhs_pipe_running(pipe, 1);
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900592
593 return ret;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900594}
595
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900596static int usbhsf_pio_prepare_push(struct usbhs_pkt *pkt, int *is_done)
597{
598 if (usbhs_pipe_is_running(pkt->pipe))
599 return 0;
600
601 return usbhsf_pio_try_push(pkt, is_done);
602}
603
Julia Lawallfcb42e22015-12-27 21:50:29 +0100604const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900605 .prepare = usbhsf_pio_prepare_push,
Kuninori Morimoto0cb7e612011-06-06 14:18:58 +0900606 .try_run = usbhsf_pio_try_push,
Kuninori Morimotodad67392011-06-06 14:18:28 +0900607};
608
Kuninori Morimoto233f5192011-07-07 00:23:24 -0700609/*
610 * PIO pop handler
611 */
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900612static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900613{
Kuninori Morimotodad67392011-06-06 14:18:28 +0900614 struct usbhs_pipe *pipe = pkt->pipe;
Kazuya Mizuguchie73d42f2015-05-26 20:13:42 +0900615 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
616 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900617
618 if (usbhs_pipe_is_busy(pipe))
619 return 0;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900620
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900621 if (usbhs_pipe_is_running(pipe))
622 return 0;
623
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900624 /*
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900625 * pipe enable to prepare packet receive
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900626 */
Kuninori Morimoto3edeee32011-12-08 18:28:54 -0800627 usbhs_pipe_data_sequence(pipe, pkt->sequence);
628 pkt->sequence = -1; /* -1 sequence will be ignored */
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900629
Kazuya Mizuguchie73d42f2015-05-26 20:13:42 +0900630 if (usbhs_pipe_is_dcp(pipe))
631 usbhsf_fifo_clear(pipe, fifo);
632
Kuninori Morimoto1c90ee02012-11-06 16:15:09 -0800633 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900634 usbhs_pipe_enable(pipe);
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900635 usbhs_pipe_running(pipe, 1);
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900636 usbhsf_rx_irq_ctrl(pipe, 1);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900637
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900638 return 0;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900639}
640
Kuninori Morimoto0cb7e612011-06-06 14:18:58 +0900641static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900642{
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900643 struct usbhs_pipe *pipe = pkt->pipe;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900644 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900645 struct device *dev = usbhs_priv_to_dev(priv);
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900646 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
647 void __iomem *addr = priv->base + fifo->port;
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900648 u8 *buf;
649 u32 data = 0;
650 int maxp = usbhs_pipe_get_maxpacket(pipe);
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900651 int rcv_len, len;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900652 int i, ret;
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900653 int total_len = 0;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900654
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900655 ret = usbhsf_fifo_select(pipe, fifo, 0);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900656 if (ret < 0)
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900657 return 0;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900658
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900659 ret = usbhsf_fifo_barrier(priv, fifo);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900660 if (ret < 0)
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900661 goto usbhs_fifo_read_busy;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900662
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900663 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900664
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900665 buf = pkt->buf + pkt->actual;
666 len = pkt->length - pkt->actual;
667 len = min(len, rcv_len);
668 total_len = len;
669
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900670 /*
Kuninori Morimoto6ff5d092011-10-10 22:05:51 -0700671 * update actual length first here to decide disable pipe.
672 * if this pipe keeps BUF status and all data were popped,
673 * then, next interrupt/token will be issued again
674 */
675 pkt->actual += total_len;
676
677 if ((pkt->actual == pkt->length) || /* receive all data */
678 (total_len < maxp)) { /* short packet */
679 *is_done = 1;
680 usbhsf_rx_irq_ctrl(pipe, 0);
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900681 usbhs_pipe_running(pipe, 0);
Yoshihiro Shimoda93fb9122015-05-26 20:13:43 +0900682 /*
683 * If function mode, since this controller is possible to enter
684 * Control Write status stage at this timing, this driver
685 * should not disable the pipe. If such a case happens, this
686 * controller is not able to complete the status stage.
687 */
688 if (!usbhs_mod_is_host(priv) && !usbhs_pipe_is_dcp(pipe))
689 usbhs_pipe_disable(pipe); /* disable pipe first */
Kuninori Morimoto6ff5d092011-10-10 22:05:51 -0700690 }
691
692 /*
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900693 * Buffer clear if Zero-Length packet
694 *
695 * see
696 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
697 */
698 if (0 == rcv_len) {
Kuninori Morimoto3edeee32011-12-08 18:28:54 -0800699 pkt->zero = 1;
Kuninori Morimotod3af90a2011-06-06 14:18:44 +0900700 usbhsf_fifo_clear(pipe, fifo);
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900701 goto usbhs_fifo_read_end;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900702 }
703
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900704 /*
705 * FIXME
706 *
707 * 32-bit access only
708 */
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900709 if (len >= 4 && !((unsigned long)buf & 0x03)) {
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900710 ioread32_rep(addr, buf, len / 4);
711 len %= 4;
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900712 buf += total_len - len;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900713 }
714
715 /* the rest operation */
716 for (i = 0; i < len; i++) {
717 if (!(i & 0x03))
718 data = ioread32(addr);
719
720 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
721 }
722
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900723usbhs_fifo_read_end:
Kuninori Morimoto659d4952011-06-06 14:18:23 +0900724 dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
725 usbhs_pipe_number(pipe),
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900726 pkt->length, pkt->actual, *is_done, pkt->zero);
Kuninori Morimoto4bd04812011-06-06 14:18:07 +0900727
Kuninori Morimotod77e3f42011-06-06 14:18:50 +0900728usbhs_fifo_read_busy:
729 usbhsf_fifo_unselect(pipe, fifo);
730
731 return ret;
Kuninori Morimotoe8d548d2011-06-06 14:18:03 +0900732}
Kuninori Morimotodad67392011-06-06 14:18:28 +0900733
Julia Lawallfcb42e22015-12-27 21:50:29 +0100734const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
Kuninori Morimotodad67392011-06-06 14:18:28 +0900735 .prepare = usbhsf_prepare_pop,
Kuninori Morimoto0cb7e612011-06-06 14:18:58 +0900736 .try_run = usbhsf_pio_try_pop,
Kuninori Morimotodad67392011-06-06 14:18:28 +0900737};
738
739/*
Kuninori Morimoto233f5192011-07-07 00:23:24 -0700740 * DCP ctrol statge handler
Kuninori Morimotodad67392011-06-06 14:18:28 +0900741 */
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900742static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
Kuninori Morimotodad67392011-06-06 14:18:28 +0900743{
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900744 usbhs_dcp_control_transfer_done(pkt->pipe);
Kuninori Morimotodad67392011-06-06 14:18:28 +0900745
Kuninori Morimoto97664a22011-06-06 14:18:38 +0900746 *is_done = 1;
Kuninori Morimotodad67392011-06-06 14:18:28 +0900747
748 return 0;
749}
750
Julia Lawallfcb42e22015-12-27 21:50:29 +0100751const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
Kuninori Morimotodad67392011-06-06 14:18:28 +0900752 .prepare = usbhsf_ctrl_stage_end,
753 .try_run = usbhsf_ctrl_stage_end,
754};
755
756/*
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900757 * DMA fifo functions
758 */
759static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
760 struct usbhs_pkt *pkt)
761{
762 if (&usbhs_fifo_dma_push_handler == pkt->handler)
763 return fifo->tx_chan;
764
765 if (&usbhs_fifo_dma_pop_handler == pkt->handler)
766 return fifo->rx_chan;
767
768 return NULL;
769}
770
771static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
772 struct usbhs_pkt *pkt)
773{
774 struct usbhs_fifo *fifo;
Yoshihiro Shimoda3a2634a2014-11-10 20:02:45 +0900775 int i;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900776
Yoshihiro Shimoda3a2634a2014-11-10 20:02:45 +0900777 usbhs_for_each_dfifo(priv, fifo, i) {
778 if (usbhsf_dma_chan_get(fifo, pkt) &&
779 !usbhsf_fifo_is_busy(fifo))
780 return fifo;
781 }
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900782
783 return NULL;
784}
785
786#define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
787#define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
788static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
789 struct usbhs_fifo *fifo,
790 u16 dreqe)
791{
792 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
793
794 usbhs_bset(priv, fifo->sel, DREQE, dreqe);
795}
796
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900797static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
798{
799 struct usbhs_pipe *pipe = pkt->pipe;
800 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
801 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
Yoshihiro Shimodac3cdcac2016-04-18 16:53:41 +0900802 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
803 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900804
Yoshihiro Shimodac3cdcac2016-04-18 16:53:41 +0900805 return info->dma_map_ctrl(chan->device->dev, pkt, map);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900806}
807
808static void usbhsf_dma_complete(void *arg);
Guennadi Liakhovetski6e4b74e2012-02-14 11:37:21 +0100809static void xfer_work(struct work_struct *work)
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900810{
Guennadi Liakhovetski6e4b74e2012-02-14 11:37:21 +0100811 struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900812 struct usbhs_pipe *pipe = pkt->pipe;
Yoshihiro Shimoda4fdef692016-06-08 16:32:49 +0900813 struct usbhs_fifo *fifo;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900814 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900815 struct dma_async_tx_descriptor *desc;
Yoshihiro Shimoda4fdef692016-06-08 16:32:49 +0900816 struct dma_chan *chan;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900817 struct device *dev = usbhs_priv_to_dev(priv);
Vinod Koul55ba4e52011-10-14 21:57:58 +0530818 enum dma_transfer_direction dir;
Yoshihiro Shimoda4fdef692016-06-08 16:32:49 +0900819 unsigned long flags;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900820
Yoshihiro Shimoda4fdef692016-06-08 16:32:49 +0900821 usbhs_lock(priv, flags);
822 fifo = usbhs_pipe_to_fifo(pipe);
823 if (!fifo)
824 goto xfer_work_end;
825
826 chan = usbhsf_dma_chan_get(fifo, pkt);
Vinod Koul55ba4e52011-10-14 21:57:58 +0530827 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900828
Kuninori Morimoto2f0de9d2012-07-08 23:10:28 -0700829 desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual,
830 pkt->trans, dir,
Alexandre Bounine16052822012-03-08 16:11:18 -0500831 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900832 if (!desc)
Yoshihiro Shimoda4fdef692016-06-08 16:32:49 +0900833 goto xfer_work_end;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900834
835 desc->callback = usbhsf_dma_complete;
836 desc->callback_param = pipe;
837
Yoshihiro Shimodaab330cf2015-03-12 15:35:20 +0900838 pkt->cookie = dmaengine_submit(desc);
839 if (pkt->cookie < 0) {
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900840 dev_err(dev, "Failed to submit dma descriptor\n");
Yoshihiro Shimoda4fdef692016-06-08 16:32:49 +0900841 goto xfer_work_end;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900842 }
843
844 dev_dbg(dev, " %s %d (%d/ %d)\n",
845 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
846
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900847 usbhs_pipe_running(pipe, 1);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900848 usbhsf_dma_start(pipe, fifo);
Yoshihiro Shimoda9b53d9a2015-03-12 15:35:19 +0900849 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900850 dma_async_issue_pending(chan);
Yoshihiro Shimoda9b53d9a2015-03-12 15:35:19 +0900851 usbhs_pipe_enable(pipe);
Yoshihiro Shimoda4fdef692016-06-08 16:32:49 +0900852
853xfer_work_end:
854 usbhs_unlock(priv, flags);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900855}
856
Kuninori Morimoto233f5192011-07-07 00:23:24 -0700857/*
858 * DMA push handler
859 */
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900860static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
861{
862 struct usbhs_pipe *pipe = pkt->pipe;
863 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
864 struct usbhs_fifo *fifo;
865 int len = pkt->length - pkt->actual;
866 int ret;
Yoshihiro Shimodaab330cf2015-03-12 15:35:20 +0900867 uintptr_t align_mask;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900868
869 if (usbhs_pipe_is_busy(pipe))
870 return 0;
871
872 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
873 if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
Yoshihiro Shimoda700aa7f2016-08-08 21:50:53 +0900874 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900875 goto usbhsf_pio_prepare_push;
876
Yoshihiro Shimodaab330cf2015-03-12 15:35:20 +0900877 /* check data length if this driver don't use USB-DMAC */
878 if (!usbhs_get_dparam(priv, has_usb_dmac) && len & 0x7)
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900879 goto usbhsf_pio_prepare_push;
880
Yoshihiro Shimodaab330cf2015-03-12 15:35:20 +0900881 /* check buffer alignment */
882 align_mask = usbhs_get_dparam(priv, has_usb_dmac) ?
883 USBHS_USB_DMAC_XFER_SIZE - 1 : 0x7;
884 if ((uintptr_t)(pkt->buf + pkt->actual) & align_mask)
Kuninori Morimoto9a12d092011-07-03 17:42:19 -0700885 goto usbhsf_pio_prepare_push;
886
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900887 /* return at this time if the pipe is running */
888 if (usbhs_pipe_is_running(pipe))
889 return 0;
890
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900891 /* get enable DMA fifo */
892 fifo = usbhsf_get_dma_fifo(priv, pkt);
893 if (!fifo)
894 goto usbhsf_pio_prepare_push;
895
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900896 ret = usbhsf_fifo_select(pipe, fifo, 0);
897 if (ret < 0)
Yoshihiro Shimodae789ece2016-04-18 16:53:40 +0900898 goto usbhsf_pio_prepare_push;
899
900 if (usbhsf_dma_map(pkt) < 0)
901 goto usbhsf_pio_prepare_push_unselect;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900902
903 pkt->trans = len;
904
Yoshihiro Shimoda64908652016-03-10 11:30:15 +0900905 usbhsf_tx_irq_ctrl(pipe, 0);
Guennadi Liakhovetski6e4b74e2012-02-14 11:37:21 +0100906 INIT_WORK(&pkt->work, xfer_work);
907 schedule_work(&pkt->work);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900908
909 return 0;
910
Yoshihiro Shimodae789ece2016-04-18 16:53:40 +0900911usbhsf_pio_prepare_push_unselect:
912 usbhsf_fifo_unselect(pipe, fifo);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900913usbhsf_pio_prepare_push:
914 /*
915 * change handler to PIO
916 */
917 pkt->handler = &usbhs_fifo_pio_push_handler;
918
919 return pkt->handler->prepare(pkt, is_done);
920}
921
922static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
923{
924 struct usbhs_pipe *pipe = pkt->pipe;
Yoshihiro Shimodac0ed8b22014-08-22 20:14:10 +0900925 int is_short = pkt->trans % usbhs_pipe_get_maxpacket(pipe);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900926
Yoshihiro Shimodac0ed8b22014-08-22 20:14:10 +0900927 pkt->actual += pkt->trans;
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900928
Yoshihiro Shimodac0ed8b22014-08-22 20:14:10 +0900929 if (pkt->actual < pkt->length)
930 *is_done = 0; /* there are remainder data */
931 else if (is_short)
932 *is_done = 1; /* short packet */
933 else
934 *is_done = !pkt->zero; /* send zero packet? */
935
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +0900936 usbhs_pipe_running(pipe, !*is_done);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900937
938 usbhsf_dma_stop(pipe, pipe->fifo);
939 usbhsf_dma_unmap(pkt);
940 usbhsf_fifo_unselect(pipe, pipe->fifo);
941
Yoshihiro Shimodac0ed8b22014-08-22 20:14:10 +0900942 if (!*is_done) {
943 /* change handler to PIO */
944 pkt->handler = &usbhs_fifo_pio_push_handler;
945 return pkt->handler->try_run(pkt, is_done);
946 }
947
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900948 return 0;
949}
950
Julia Lawallfcb42e22015-12-27 21:50:29 +0100951const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
Kuninori Morimotoe73a9892011-06-06 14:19:03 +0900952 .prepare = usbhsf_dma_prepare_push,
953 .dma_done = usbhsf_dma_push_done,
954};
955
Kuninori Morimoto233f5192011-07-07 00:23:24 -0700956/*
957 * DMA pop handler
958 */
Yoshihiro Shimodaab330cf2015-03-12 15:35:20 +0900959
960static int usbhsf_dma_prepare_pop_with_rx_irq(struct usbhs_pkt *pkt,
961 int *is_done)
962{
963 return usbhsf_prepare_pop(pkt, is_done);
964}
965
966static int usbhsf_dma_prepare_pop_with_usb_dmac(struct usbhs_pkt *pkt,
967 int *is_done)
968{
969 struct usbhs_pipe *pipe = pkt->pipe;
970 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
971 struct usbhs_fifo *fifo;
972 int ret;
973
974 if (usbhs_pipe_is_busy(pipe))
975 return 0;
976
977 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
978 if ((pkt->length < usbhs_get_dparam(priv, pio_dma_border)) ||
Yoshihiro Shimoda700aa7f2016-08-08 21:50:53 +0900979 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
Yoshihiro Shimodaab330cf2015-03-12 15:35:20 +0900980 goto usbhsf_pio_prepare_pop;
981
982 fifo = usbhsf_get_dma_fifo(priv, pkt);
983 if (!fifo)
984 goto usbhsf_pio_prepare_pop;
985
986 if ((uintptr_t)pkt->buf & (USBHS_USB_DMAC_XFER_SIZE - 1))
987 goto usbhsf_pio_prepare_pop;
988
989 usbhs_pipe_config_change_bfre(pipe, 1);
990
991 ret = usbhsf_fifo_select(pipe, fifo, 0);
992 if (ret < 0)
993 goto usbhsf_pio_prepare_pop;
994
995 if (usbhsf_dma_map(pkt) < 0)
996 goto usbhsf_pio_prepare_pop_unselect;
997
998 /* DMA */
999
1000 /*
1001 * usbhs_fifo_dma_pop_handler :: prepare
1002 * enabled irq to come here.
1003 * but it is no longer needed for DMA. disable it.
1004 */
1005 usbhsf_rx_irq_ctrl(pipe, 0);
1006
1007 pkt->trans = pkt->length;
1008
1009 INIT_WORK(&pkt->work, xfer_work);
1010 schedule_work(&pkt->work);
1011
1012 return 0;
1013
1014usbhsf_pio_prepare_pop_unselect:
1015 usbhsf_fifo_unselect(pipe, fifo);
1016usbhsf_pio_prepare_pop:
1017
1018 /*
1019 * change handler to PIO
1020 */
1021 pkt->handler = &usbhs_fifo_pio_pop_handler;
1022 usbhs_pipe_config_change_bfre(pipe, 0);
1023
1024 return pkt->handler->prepare(pkt, is_done);
1025}
1026
1027static int usbhsf_dma_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
1028{
1029 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1030
1031 if (usbhs_get_dparam(priv, has_usb_dmac))
1032 return usbhsf_dma_prepare_pop_with_usb_dmac(pkt, is_done);
1033 else
1034 return usbhsf_dma_prepare_pop_with_rx_irq(pkt, is_done);
1035}
1036
1037static int usbhsf_dma_try_pop_with_rx_irq(struct usbhs_pkt *pkt, int *is_done)
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001038{
1039 struct usbhs_pipe *pipe = pkt->pipe;
1040 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1041 struct usbhs_fifo *fifo;
1042 int len, ret;
1043
1044 if (usbhs_pipe_is_busy(pipe))
1045 return 0;
1046
1047 if (usbhs_pipe_is_dcp(pipe))
1048 goto usbhsf_pio_prepare_pop;
1049
1050 /* get enable DMA fifo */
1051 fifo = usbhsf_get_dma_fifo(priv, pkt);
1052 if (!fifo)
1053 goto usbhsf_pio_prepare_pop;
1054
Kuninori Morimotoc9ae0c92011-10-26 01:21:07 -07001055 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
Kuninori Morimoto9a12d092011-07-03 17:42:19 -07001056 goto usbhsf_pio_prepare_pop;
1057
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001058 ret = usbhsf_fifo_select(pipe, fifo, 0);
1059 if (ret < 0)
1060 goto usbhsf_pio_prepare_pop;
1061
1062 /* use PIO if packet is less than pio_dma_border */
1063 len = usbhsf_fifo_rcv_len(priv, fifo);
1064 len = min(pkt->length - pkt->actual, len);
Kuninori Morimoto77975ee2012-08-22 18:01:13 -07001065 if (len & 0x7) /* 8byte alignment */
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001066 goto usbhsf_pio_prepare_pop_unselect;
1067
1068 if (len < usbhs_get_dparam(priv, pio_dma_border))
1069 goto usbhsf_pio_prepare_pop_unselect;
1070
1071 ret = usbhsf_fifo_barrier(priv, fifo);
1072 if (ret < 0)
1073 goto usbhsf_pio_prepare_pop_unselect;
1074
1075 if (usbhsf_dma_map(pkt) < 0)
1076 goto usbhsf_pio_prepare_pop_unselect;
1077
1078 /* DMA */
1079
1080 /*
1081 * usbhs_fifo_dma_pop_handler :: prepare
1082 * enabled irq to come here.
1083 * but it is no longer needed for DMA. disable it.
1084 */
1085 usbhsf_rx_irq_ctrl(pipe, 0);
1086
1087 pkt->trans = len;
1088
Guennadi Liakhovetski6e4b74e2012-02-14 11:37:21 +01001089 INIT_WORK(&pkt->work, xfer_work);
1090 schedule_work(&pkt->work);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001091
1092 return 0;
1093
1094usbhsf_pio_prepare_pop_unselect:
1095 usbhsf_fifo_unselect(pipe, fifo);
1096usbhsf_pio_prepare_pop:
1097
1098 /*
1099 * change handler to PIO
1100 */
1101 pkt->handler = &usbhs_fifo_pio_pop_handler;
1102
1103 return pkt->handler->try_run(pkt, is_done);
1104}
1105
Yoshihiro Shimodaab330cf2015-03-12 15:35:20 +09001106static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
1107{
1108 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1109
1110 BUG_ON(usbhs_get_dparam(priv, has_usb_dmac));
1111
1112 return usbhsf_dma_try_pop_with_rx_irq(pkt, is_done);
1113}
1114
1115static int usbhsf_dma_pop_done_with_rx_irq(struct usbhs_pkt *pkt, int *is_done)
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001116{
1117 struct usbhs_pipe *pipe = pkt->pipe;
1118 int maxp = usbhs_pipe_get_maxpacket(pipe);
1119
1120 usbhsf_dma_stop(pipe, pipe->fifo);
1121 usbhsf_dma_unmap(pkt);
1122 usbhsf_fifo_unselect(pipe, pipe->fifo);
1123
1124 pkt->actual += pkt->trans;
1125
1126 if ((pkt->actual == pkt->length) || /* receive all data */
1127 (pkt->trans < maxp)) { /* short packet */
1128 *is_done = 1;
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +09001129 usbhs_pipe_running(pipe, 0);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001130 } else {
1131 /* re-enable */
Yoshihiro Shimoda8355b2b2014-08-22 20:13:50 +09001132 usbhs_pipe_running(pipe, 0);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001133 usbhsf_prepare_pop(pkt, is_done);
1134 }
1135
1136 return 0;
1137}
1138
Yoshihiro Shimodaab330cf2015-03-12 15:35:20 +09001139static size_t usbhs_dma_calc_received_size(struct usbhs_pkt *pkt,
1140 struct dma_chan *chan, int dtln)
1141{
1142 struct usbhs_pipe *pipe = pkt->pipe;
1143 struct dma_tx_state state;
1144 size_t received_size;
1145 int maxp = usbhs_pipe_get_maxpacket(pipe);
1146
1147 dmaengine_tx_status(chan, pkt->cookie, &state);
1148 received_size = pkt->length - state.residue;
1149
1150 if (dtln) {
1151 received_size -= USBHS_USB_DMAC_XFER_SIZE;
1152 received_size &= ~(maxp - 1);
1153 received_size += dtln;
1154 }
1155
1156 return received_size;
1157}
1158
1159static int usbhsf_dma_pop_done_with_usb_dmac(struct usbhs_pkt *pkt,
1160 int *is_done)
1161{
1162 struct usbhs_pipe *pipe = pkt->pipe;
1163 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1164 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
1165 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
1166 int rcv_len;
1167
1168 /*
1169 * Since the driver disables rx_irq in DMA mode, the interrupt handler
1170 * cannot the BRDYSTS. So, the function clears it here because the
1171 * driver may use PIO mode next time.
1172 */
1173 usbhs_xxxsts_clear(priv, BRDYSTS, usbhs_pipe_number(pipe));
1174
1175 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
1176 usbhsf_fifo_clear(pipe, fifo);
1177 pkt->actual = usbhs_dma_calc_received_size(pkt, chan, rcv_len);
1178
1179 usbhsf_dma_stop(pipe, fifo);
1180 usbhsf_dma_unmap(pkt);
1181 usbhsf_fifo_unselect(pipe, pipe->fifo);
1182
1183 /* The driver can assume the rx transaction is always "done" */
1184 *is_done = 1;
1185
1186 return 0;
1187}
1188
1189static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
1190{
1191 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1192
1193 if (usbhs_get_dparam(priv, has_usb_dmac))
1194 return usbhsf_dma_pop_done_with_usb_dmac(pkt, is_done);
1195 else
1196 return usbhsf_dma_pop_done_with_rx_irq(pkt, is_done);
1197}
1198
Julia Lawallfcb42e22015-12-27 21:50:29 +01001199const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
Yoshihiro Shimodaab330cf2015-03-12 15:35:20 +09001200 .prepare = usbhsf_dma_prepare_pop,
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001201 .try_run = usbhsf_dma_try_pop,
1202 .dma_done = usbhsf_dma_pop_done
1203};
1204
1205/*
1206 * DMA setting
1207 */
1208static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
1209{
1210 struct sh_dmae_slave *slave = param;
1211
1212 /*
1213 * FIXME
1214 *
1215 * usbhs doesn't recognize id = 0 as valid DMA
1216 */
Guennadi Liakhovetskif19b7e02012-05-09 17:09:19 +02001217 if (0 == slave->shdma_slave.slave_id)
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001218 return false;
1219
1220 chan->private = slave;
1221
1222 return true;
1223}
1224
1225static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1226{
1227 if (fifo->tx_chan)
1228 dma_release_channel(fifo->tx_chan);
1229 if (fifo->rx_chan)
1230 dma_release_channel(fifo->rx_chan);
1231
1232 fifo->tx_chan = NULL;
1233 fifo->rx_chan = NULL;
1234}
1235
Yoshihiro Shimoda6e3f53a2015-01-19 12:53:16 +09001236static void usbhsf_dma_init_pdev(struct usbhs_fifo *fifo)
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001237{
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001238 dma_cap_mask_t mask;
1239
1240 dma_cap_zero(mask);
1241 dma_cap_set(DMA_SLAVE, mask);
1242 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1243 &fifo->tx_slave);
1244
1245 dma_cap_zero(mask);
1246 dma_cap_set(DMA_SLAVE, mask);
1247 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1248 &fifo->rx_slave);
Yoshihiro Shimoda6e3f53a2015-01-19 12:53:16 +09001249}
1250
Yoshihiro Shimoda7a96b782015-03-12 15:35:18 +09001251static void usbhsf_dma_init_dt(struct device *dev, struct usbhs_fifo *fifo,
1252 int channel)
Yoshihiro Shimodaabd2dbf2015-01-19 12:53:17 +09001253{
Yoshihiro Shimoda7a96b782015-03-12 15:35:18 +09001254 char name[16];
1255
Yoshihiro Shimoda7cc99f12015-04-08 19:42:24 +09001256 /*
1257 * To avoid complex handing for DnFIFOs, the driver uses each
1258 * DnFIFO as TX or RX direction (not bi-direction).
1259 * So, the driver uses odd channels for TX, even channels for RX.
1260 */
1261 snprintf(name, sizeof(name), "ch%d", channel);
1262 if (channel & 1) {
1263 fifo->tx_chan = dma_request_slave_channel_reason(dev, name);
1264 if (IS_ERR(fifo->tx_chan))
1265 fifo->tx_chan = NULL;
1266 } else {
1267 fifo->rx_chan = dma_request_slave_channel_reason(dev, name);
1268 if (IS_ERR(fifo->rx_chan))
1269 fifo->rx_chan = NULL;
1270 }
Yoshihiro Shimodaabd2dbf2015-01-19 12:53:17 +09001271}
1272
Yoshihiro Shimoda7a96b782015-03-12 15:35:18 +09001273static void usbhsf_dma_init(struct usbhs_priv *priv, struct usbhs_fifo *fifo,
1274 int channel)
Yoshihiro Shimoda6e3f53a2015-01-19 12:53:16 +09001275{
1276 struct device *dev = usbhs_priv_to_dev(priv);
1277
Yoshihiro Shimodaabd2dbf2015-01-19 12:53:17 +09001278 if (dev->of_node)
Yoshihiro Shimoda7a96b782015-03-12 15:35:18 +09001279 usbhsf_dma_init_dt(dev, fifo, channel);
Yoshihiro Shimodaabd2dbf2015-01-19 12:53:17 +09001280 else
1281 usbhsf_dma_init_pdev(fifo);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001282
1283 if (fifo->tx_chan || fifo->rx_chan)
Kuninori Morimoto4ce68802011-06-21 09:33:43 +09001284 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001285 fifo->name,
1286 fifo->tx_chan ? "[TX]" : " ",
1287 fifo->rx_chan ? "[RX]" : " ");
1288}
1289
1290/*
Kuninori Morimotodad67392011-06-06 14:18:28 +09001291 * irq functions
1292 */
1293static int usbhsf_irq_empty(struct usbhs_priv *priv,
1294 struct usbhs_irq_state *irq_state)
1295{
1296 struct usbhs_pipe *pipe;
Kuninori Morimotodad67392011-06-06 14:18:28 +09001297 struct device *dev = usbhs_priv_to_dev(priv);
1298 int i, ret;
1299
1300 if (!irq_state->bempsts) {
1301 dev_err(dev, "debug %s !!\n", __func__);
1302 return -EIO;
1303 }
1304
1305 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1306
1307 /*
1308 * search interrupted "pipe"
1309 * not "uep".
1310 */
1311 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1312 if (!(irq_state->bempsts & (1 << i)))
1313 continue;
1314
Kuninori Morimoto51b8a022011-10-10 21:58:45 -07001315 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
Kuninori Morimotodad67392011-06-06 14:18:28 +09001316 if (ret < 0)
1317 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1318 }
1319
1320 return 0;
1321}
1322
1323static int usbhsf_irq_ready(struct usbhs_priv *priv,
1324 struct usbhs_irq_state *irq_state)
1325{
1326 struct usbhs_pipe *pipe;
Kuninori Morimotodad67392011-06-06 14:18:28 +09001327 struct device *dev = usbhs_priv_to_dev(priv);
1328 int i, ret;
1329
1330 if (!irq_state->brdysts) {
1331 dev_err(dev, "debug %s !!\n", __func__);
1332 return -EIO;
1333 }
1334
1335 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1336
1337 /*
1338 * search interrupted "pipe"
1339 * not "uep".
1340 */
1341 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1342 if (!(irq_state->brdysts & (1 << i)))
1343 continue;
1344
Kuninori Morimoto51b8a022011-10-10 21:58:45 -07001345 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
Kuninori Morimotodad67392011-06-06 14:18:28 +09001346 if (ret < 0)
1347 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1348 }
1349
1350 return 0;
1351}
1352
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001353static void usbhsf_dma_complete(void *arg)
1354{
1355 struct usbhs_pipe *pipe = arg;
1356 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1357 struct device *dev = usbhs_priv_to_dev(priv);
1358 int ret;
1359
Kuninori Morimoto51b8a022011-10-10 21:58:45 -07001360 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001361 if (ret < 0)
1362 dev_err(dev, "dma_complete run_error %d : %d\n",
1363 usbhs_pipe_number(pipe), ret);
1364}
1365
Yoshihiro Shimodacdeb7942014-11-04 10:05:45 +09001366void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe)
1367{
1368 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1369 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
1370
1371 /* clear DCP FIFO of transmission */
1372 if (usbhsf_fifo_select(pipe, fifo, 1) < 0)
1373 return;
1374 usbhsf_fifo_clear(pipe, fifo);
1375 usbhsf_fifo_unselect(pipe, fifo);
1376
1377 /* clear DCP FIFO of reception */
1378 if (usbhsf_fifo_select(pipe, fifo, 0) < 0)
1379 return;
1380 usbhsf_fifo_clear(pipe, fifo);
1381 usbhsf_fifo_unselect(pipe, fifo);
1382}
1383
Kuninori Morimotodad67392011-06-06 14:18:28 +09001384/*
1385 * fifo init
1386 */
1387void usbhs_fifo_init(struct usbhs_priv *priv)
1388{
1389 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
Kuninori Morimotod77e3f42011-06-06 14:18:50 +09001390 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
Yoshihiro Shimoda3a2634a2014-11-10 20:02:45 +09001391 struct usbhs_fifo *dfifo;
1392 int i;
Kuninori Morimotodad67392011-06-06 14:18:28 +09001393
1394 mod->irq_empty = usbhsf_irq_empty;
1395 mod->irq_ready = usbhsf_irq_ready;
1396 mod->irq_bempsts = 0;
1397 mod->irq_brdysts = 0;
Kuninori Morimotod77e3f42011-06-06 14:18:50 +09001398
1399 cfifo->pipe = NULL;
Yoshihiro Shimoda3a2634a2014-11-10 20:02:45 +09001400 usbhs_for_each_dfifo(priv, dfifo, i)
1401 dfifo->pipe = NULL;
Kuninori Morimotodad67392011-06-06 14:18:28 +09001402}
1403
1404void usbhs_fifo_quit(struct usbhs_priv *priv)
1405{
1406 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1407
1408 mod->irq_empty = NULL;
1409 mod->irq_ready = NULL;
1410 mod->irq_bempsts = 0;
1411 mod->irq_brdysts = 0;
1412}
Kuninori Morimotod3af90a2011-06-06 14:18:44 +09001413
Yoshihiro Shimoda53e734b2014-11-10 20:02:46 +09001414#define __USBHS_DFIFO_INIT(priv, fifo, channel, fifo_port) \
Yoshihiro Shimoda3a2634a2014-11-10 20:02:45 +09001415do { \
1416 fifo = usbhsf_get_dnfifo(priv, channel); \
1417 fifo->name = "D"#channel"FIFO"; \
Yoshihiro Shimoda53e734b2014-11-10 20:02:46 +09001418 fifo->port = fifo_port; \
Yoshihiro Shimoda3a2634a2014-11-10 20:02:45 +09001419 fifo->sel = D##channel##FIFOSEL; \
1420 fifo->ctr = D##channel##FIFOCTR; \
1421 fifo->tx_slave.shdma_slave.slave_id = \
1422 usbhs_get_dparam(priv, d##channel##_tx_id); \
1423 fifo->rx_slave.shdma_slave.slave_id = \
1424 usbhs_get_dparam(priv, d##channel##_rx_id); \
Yoshihiro Shimoda7a96b782015-03-12 15:35:18 +09001425 usbhsf_dma_init(priv, fifo, channel); \
Yoshihiro Shimoda3a2634a2014-11-10 20:02:45 +09001426} while (0)
1427
Yoshihiro Shimoda53e734b2014-11-10 20:02:46 +09001428#define USBHS_DFIFO_INIT(priv, fifo, channel) \
1429 __USBHS_DFIFO_INIT(priv, fifo, channel, D##channel##FIFO)
1430#define USBHS_DFIFO_INIT_NO_PORT(priv, fifo, channel) \
1431 __USBHS_DFIFO_INIT(priv, fifo, channel, 0)
1432
Kuninori Morimotod3af90a2011-06-06 14:18:44 +09001433int usbhs_fifo_probe(struct usbhs_priv *priv)
1434{
1435 struct usbhs_fifo *fifo;
1436
1437 /* CFIFO */
1438 fifo = usbhsf_get_cfifo(priv);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001439 fifo->name = "CFIFO";
Kuninori Morimotod3af90a2011-06-06 14:18:44 +09001440 fifo->port = CFIFO;
1441 fifo->sel = CFIFOSEL;
1442 fifo->ctr = CFIFOCTR;
1443
Yoshihiro Shimoda3a2634a2014-11-10 20:02:45 +09001444 /* DFIFO */
1445 USBHS_DFIFO_INIT(priv, fifo, 0);
1446 USBHS_DFIFO_INIT(priv, fifo, 1);
Yoshihiro Shimodad3cf6a42014-11-10 20:02:47 +09001447 USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 2);
1448 USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 3);
Kuninori Morimotoe73a9892011-06-06 14:19:03 +09001449
Kuninori Morimotod3af90a2011-06-06 14:18:44 +09001450 return 0;
1451}
1452
1453void usbhs_fifo_remove(struct usbhs_priv *priv)
1454{
Yoshihiro Shimoda3a2634a2014-11-10 20:02:45 +09001455 struct usbhs_fifo *fifo;
1456 int i;
1457
1458 usbhs_for_each_dfifo(priv, fifo, i)
1459 usbhsf_dma_quit(priv, fifo);
Kuninori Morimotod3af90a2011-06-06 14:18:44 +09001460}