4
* Copyright (C) 2011 Renesas Solutions Corp.
5
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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.
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
17
#include <linux/delay.h>
19
#include <linux/scatterlist.h>
23
#define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo))
24
#define usbhsf_get_d0fifo(p) (&((p)->fifo_info.d0fifo))
25
#define usbhsf_get_d1fifo(p) (&((p)->fifo_info.d1fifo))
27
#define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
32
void usbhs_pkt_init(struct usbhs_pkt *pkt)
34
pkt->dma = DMA_ADDR_INVALID;
35
INIT_LIST_HEAD(&pkt->node);
39
* packet control function
41
static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done)
43
struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
44
struct device *dev = usbhs_priv_to_dev(priv);
46
dev_err(dev, "null handler\n");
51
static struct usbhs_pkt_handle usbhsf_null_handler = {
52
.prepare = usbhsf_null_handle,
53
.try_run = usbhsf_null_handle,
56
void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
57
void (*done)(struct usbhs_priv *priv,
58
struct usbhs_pkt *pkt),
59
void *buf, int len, int zero)
61
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
62
struct device *dev = usbhs_priv_to_dev(priv);
66
dev_err(dev, "no done function\n");
70
/******************** spin lock ********************/
71
usbhs_lock(priv, flags);
74
dev_err(dev, "no handler function\n");
75
pipe->handler = &usbhsf_null_handler;
78
list_del_init(&pkt->node);
79
list_add_tail(&pkt->node, &pipe->list);
82
* each pkt must hold own handler.
83
* because handler might be changed by its situation.
84
* dma handler -> pio handler.
88
pkt->handler = pipe->handler;
94
usbhs_unlock(priv, flags);
95
/******************** spin unlock ******************/
98
static void __usbhsf_pkt_del(struct usbhs_pkt *pkt)
100
list_del_init(&pkt->node);
103
static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe)
105
if (list_empty(&pipe->list))
108
return list_entry(pipe->list.next, struct usbhs_pkt, node);
111
struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
113
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
116
/******************** spin lock ********************/
117
usbhs_lock(priv, flags);
120
pkt = __usbhsf_pkt_get(pipe);
123
__usbhsf_pkt_del(pkt);
125
usbhs_unlock(priv, flags);
126
/******************** spin unlock ******************/
137
static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type)
139
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
140
struct usbhs_pkt *pkt;
141
struct device *dev = usbhs_priv_to_dev(priv);
142
int (*func)(struct usbhs_pkt *pkt, int *is_done);
147
/******************** spin lock ********************/
148
usbhs_lock(priv, flags);
150
pkt = __usbhsf_pkt_get(pipe);
152
goto __usbhs_pkt_handler_end;
155
case USBHSF_PKT_PREPARE:
156
func = pkt->handler->prepare;
158
case USBHSF_PKT_TRY_RUN:
159
func = pkt->handler->try_run;
161
case USBHSF_PKT_DMA_DONE:
162
func = pkt->handler->dma_done;
165
dev_err(dev, "unknown pkt hander\n");
166
goto __usbhs_pkt_handler_end;
169
ret = func(pkt, &is_done);
172
__usbhsf_pkt_del(pkt);
174
__usbhs_pkt_handler_end:
175
usbhs_unlock(priv, flags);
176
/******************** spin unlock ******************/
179
pkt->done(priv, pkt);
180
usbhs_pkt_start(pipe);
186
void usbhs_pkt_start(struct usbhs_pipe *pipe)
188
usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE);
192
* irq enable/disable function
194
#define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, bempsts, e)
195
#define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, brdysts, e)
196
#define usbhsf_irq_callback_ctrl(pipe, status, enable) \
198
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \
199
struct usbhs_mod *mod = usbhs_mod_get_current(priv); \
200
u16 status = (1 << usbhs_pipe_number(pipe)); \
204
mod->irq_##status |= status; \
206
mod->irq_##status &= ~status; \
207
usbhs_irq_callback_update(priv, mod); \
210
static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
213
* And DCP pipe can NOT use "ready interrupt" for "send"
214
* it should use "empty" interrupt.
216
* "Operation" - "Interrupt Function" - "BRDY Interrupt"
218
* on the other hand, normal pipe can use "ready interrupt" for "send"
219
* even though it is single/double buffer
221
if (usbhs_pipe_is_dcp(pipe))
222
usbhsf_irq_empty_ctrl(pipe, enable);
224
usbhsf_irq_ready_ctrl(pipe, enable);
227
static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
229
usbhsf_irq_ready_ctrl(pipe, enable);
235
static void usbhsf_send_terminator(struct usbhs_pipe *pipe,
236
struct usbhs_fifo *fifo)
238
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
240
usbhs_bset(priv, fifo->ctr, BVAL, BVAL);
243
static int usbhsf_fifo_barrier(struct usbhs_priv *priv,
244
struct usbhs_fifo *fifo)
249
/* The FIFO port is accessible */
250
if (usbhs_read(priv, fifo->ctr) & FRDY)
259
static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
260
struct usbhs_fifo *fifo)
262
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
264
if (!usbhs_pipe_is_dcp(pipe))
265
usbhsf_fifo_barrier(priv, fifo);
267
usbhs_write(priv, fifo->ctr, BCLR);
270
static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv,
271
struct usbhs_fifo *fifo)
273
return usbhs_read(priv, fifo->ctr) & DTLN_MASK;
276
static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
277
struct usbhs_fifo *fifo)
279
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
281
usbhs_pipe_select_fifo(pipe, NULL);
282
usbhs_write(priv, fifo->sel, 0);
285
static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
286
struct usbhs_fifo *fifo,
289
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
290
struct device *dev = usbhs_priv_to_dev(priv);
292
u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
293
u16 base = usbhs_pipe_number(pipe); /* CURPIPE */
295
if (usbhs_pipe_is_busy(pipe) ||
296
usbhsf_fifo_is_busy(fifo))
299
if (usbhs_pipe_is_dcp(pipe)) {
300
base |= (1 == write) << 5; /* ISEL */
302
if (usbhs_mod_is_host(priv))
303
usbhs_dcp_dir_for_host(pipe, write);
306
/* "base" will be used below */
307
usbhs_write(priv, fifo->sel, base | MBW_32);
309
/* check ISEL and CURPIPE value */
311
if (base == (mask & usbhs_read(priv, fifo->sel))) {
312
usbhs_pipe_select_fifo(pipe, fifo);
318
dev_err(dev, "fifo select error\n");
326
static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
328
struct usbhs_pipe *pipe = pkt->pipe;
329
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
330
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
331
struct device *dev = usbhs_priv_to_dev(priv);
334
usbhs_pipe_disable(pipe);
336
ret = usbhsf_fifo_select(pipe, fifo, 1);
338
dev_err(dev, "%s() faile\n", __func__);
342
usbhs_pipe_sequence_data1(pipe); /* DATA1 */
344
usbhsf_fifo_clear(pipe, fifo);
345
usbhsf_send_terminator(pipe, fifo);
347
usbhsf_fifo_unselect(pipe, fifo);
349
usbhsf_tx_irq_ctrl(pipe, 1);
350
usbhs_pipe_enable(pipe);
355
static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done)
357
struct usbhs_pipe *pipe = pkt->pipe;
358
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
359
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
360
struct device *dev = usbhs_priv_to_dev(priv);
363
usbhs_pipe_disable(pipe);
365
ret = usbhsf_fifo_select(pipe, fifo, 0);
367
dev_err(dev, "%s() fail\n", __func__);
371
usbhs_pipe_sequence_data1(pipe); /* DATA1 */
372
usbhsf_fifo_clear(pipe, fifo);
374
usbhsf_fifo_unselect(pipe, fifo);
376
usbhsf_rx_irq_ctrl(pipe, 1);
377
usbhs_pipe_enable(pipe);
383
static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done)
385
struct usbhs_pipe *pipe = pkt->pipe;
387
if (pkt->handler == &usbhs_dcp_status_stage_in_handler)
388
usbhsf_tx_irq_ctrl(pipe, 0);
390
usbhsf_rx_irq_ctrl(pipe, 0);
392
pkt->actual = pkt->length;
398
struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = {
399
.prepare = usbhs_dcp_dir_switch_to_write,
400
.try_run = usbhs_dcp_dir_switch_done,
403
struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = {
404
.prepare = usbhs_dcp_dir_switch_to_read,
405
.try_run = usbhs_dcp_dir_switch_done,
409
* DCP data stage (push)
411
static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done)
413
struct usbhs_pipe *pipe = pkt->pipe;
415
usbhs_pipe_sequence_data1(pipe); /* DATA1 */
418
* change handler to PIO push
420
pkt->handler = &usbhs_fifo_pio_push_handler;
422
return pkt->handler->prepare(pkt, is_done);
425
struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = {
426
.prepare = usbhsf_dcp_data_stage_try_push,
430
* DCP data stage (pop)
432
static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt,
435
struct usbhs_pipe *pipe = pkt->pipe;
436
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
437
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
439
if (usbhs_pipe_is_busy(pipe))
443
* prepare pop for DCP should
444
* - change DCP direction,
448
usbhs_pipe_disable(pipe);
450
usbhs_pipe_sequence_data1(pipe); /* DATA1 */
452
usbhsf_fifo_select(pipe, fifo, 0);
453
usbhsf_fifo_clear(pipe, fifo);
454
usbhsf_fifo_unselect(pipe, fifo);
457
* change handler to PIO pop
459
pkt->handler = &usbhs_fifo_pio_pop_handler;
461
return pkt->handler->prepare(pkt, is_done);
464
struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = {
465
.prepare = usbhsf_dcp_data_stage_prepare_pop,
471
static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
473
struct usbhs_pipe *pipe = pkt->pipe;
474
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
475
struct device *dev = usbhs_priv_to_dev(priv);
476
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
477
void __iomem *addr = priv->base + fifo->port;
479
int maxp = usbhs_pipe_get_maxpacket(pipe);
484
ret = usbhsf_fifo_select(pipe, fifo, 1);
488
ret = usbhs_pipe_is_accessible(pipe);
490
/* inaccessible pipe is not an error */
492
goto usbhs_fifo_write_busy;
495
ret = usbhsf_fifo_barrier(priv, fifo);
497
goto usbhs_fifo_write_busy;
499
buf = pkt->buf + pkt->actual;
500
len = pkt->length - pkt->actual;
501
len = min(len, maxp);
503
is_short = total_len < maxp;
510
if (len >= 4 && !((unsigned long)buf & 0x03)) {
511
iowrite32_rep(addr, buf, len / 4);
513
buf += total_len - len;
516
/* the rest operation */
517
for (i = 0; i < len; i++)
518
iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
523
pkt->actual += total_len;
525
if (pkt->actual < pkt->length)
526
*is_done = 0; /* there are remainder data */
528
*is_done = 1; /* short packet */
530
*is_done = !pkt->zero; /* send zero packet ? */
536
usbhsf_send_terminator(pipe, fifo);
538
usbhsf_tx_irq_ctrl(pipe, !*is_done);
539
usbhs_pipe_enable(pipe);
541
dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
542
usbhs_pipe_number(pipe),
543
pkt->length, pkt->actual, *is_done, pkt->zero);
549
if (usbhs_pipe_is_dcp(pipe))
550
usbhs_dcp_control_transfer_done(pipe);
553
usbhsf_fifo_unselect(pipe, fifo);
557
usbhs_fifo_write_busy:
558
usbhsf_fifo_unselect(pipe, fifo);
564
usbhsf_tx_irq_ctrl(pipe, 1);
569
struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
570
.prepare = usbhsf_pio_try_push,
571
.try_run = usbhsf_pio_try_push,
577
static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
579
struct usbhs_pipe *pipe = pkt->pipe;
581
if (usbhs_pipe_is_busy(pipe))
585
* pipe enable to prepare packet receive
588
usbhs_pipe_enable(pipe);
589
usbhsf_rx_irq_ctrl(pipe, 1);
594
static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
596
struct usbhs_pipe *pipe = pkt->pipe;
597
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
598
struct device *dev = usbhs_priv_to_dev(priv);
599
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
600
void __iomem *addr = priv->base + fifo->port;
603
int maxp = usbhs_pipe_get_maxpacket(pipe);
608
ret = usbhsf_fifo_select(pipe, fifo, 0);
612
ret = usbhsf_fifo_barrier(priv, fifo);
614
goto usbhs_fifo_read_busy;
616
rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
618
buf = pkt->buf + pkt->actual;
619
len = pkt->length - pkt->actual;
620
len = min(len, rcv_len);
624
* update actual length first here to decide disable pipe.
625
* if this pipe keeps BUF status and all data were popped,
626
* then, next interrupt/token will be issued again
628
pkt->actual += total_len;
630
if ((pkt->actual == pkt->length) || /* receive all data */
631
(total_len < maxp)) { /* short packet */
633
usbhsf_rx_irq_ctrl(pipe, 0);
634
usbhs_pipe_disable(pipe); /* disable pipe first */
638
* Buffer clear if Zero-Length packet
641
* "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
644
usbhsf_fifo_clear(pipe, fifo);
645
goto usbhs_fifo_read_end;
653
if (len >= 4 && !((unsigned long)buf & 0x03)) {
654
ioread32_rep(addr, buf, len / 4);
656
buf += total_len - len;
659
/* the rest operation */
660
for (i = 0; i < len; i++) {
662
data = ioread32(addr);
664
buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
668
dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
669
usbhs_pipe_number(pipe),
670
pkt->length, pkt->actual, *is_done, pkt->zero);
672
usbhs_fifo_read_busy:
673
usbhsf_fifo_unselect(pipe, fifo);
678
struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
679
.prepare = usbhsf_prepare_pop,
680
.try_run = usbhsf_pio_try_pop,
684
* DCP ctrol statge handler
686
static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
688
usbhs_dcp_control_transfer_done(pkt->pipe);
695
struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
696
.prepare = usbhsf_ctrl_stage_end,
697
.try_run = usbhsf_ctrl_stage_end,
703
static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
704
struct usbhs_pkt *pkt)
706
if (&usbhs_fifo_dma_push_handler == pkt->handler)
707
return fifo->tx_chan;
709
if (&usbhs_fifo_dma_pop_handler == pkt->handler)
710
return fifo->rx_chan;
715
static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
716
struct usbhs_pkt *pkt)
718
struct usbhs_fifo *fifo;
721
fifo = usbhsf_get_d0fifo(priv);
722
if (usbhsf_dma_chan_get(fifo, pkt) &&
723
!usbhsf_fifo_is_busy(fifo))
727
fifo = usbhsf_get_d1fifo(priv);
728
if (usbhsf_dma_chan_get(fifo, pkt) &&
729
!usbhsf_fifo_is_busy(fifo))
735
#define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
736
#define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
737
static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
738
struct usbhs_fifo *fifo,
741
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
743
usbhs_bset(priv, fifo->sel, DREQE, dreqe);
746
#define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
747
#define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
748
static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
750
struct usbhs_pipe *pipe = pkt->pipe;
751
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
752
struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
754
return info->dma_map_ctrl(pkt, map);
757
static void usbhsf_dma_complete(void *arg);
758
static void usbhsf_dma_prepare_tasklet(unsigned long data)
760
struct usbhs_pkt *pkt = (struct usbhs_pkt *)data;
761
struct usbhs_pipe *pipe = pkt->pipe;
762
struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
763
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
764
struct scatterlist sg;
765
struct dma_async_tx_descriptor *desc;
766
struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
767
struct device *dev = usbhs_priv_to_dev(priv);
768
enum dma_data_direction dir;
771
dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
773
sg_init_table(&sg, 1);
774
sg_set_page(&sg, virt_to_page(pkt->dma),
775
pkt->length, offset_in_page(pkt->dma));
776
sg_dma_address(&sg) = pkt->dma + pkt->actual;
777
sg_dma_len(&sg) = pkt->trans;
779
desc = chan->device->device_prep_slave_sg(chan, &sg, 1, dir,
785
desc->callback = usbhsf_dma_complete;
786
desc->callback_param = pipe;
788
cookie = desc->tx_submit(desc);
790
dev_err(dev, "Failed to submit dma descriptor\n");
794
dev_dbg(dev, " %s %d (%d/ %d)\n",
795
fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
797
usbhsf_dma_start(pipe, fifo);
798
dma_async_issue_pending(chan);
804
static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
806
struct usbhs_pipe *pipe = pkt->pipe;
807
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
808
struct usbhs_fifo *fifo;
809
int len = pkt->length - pkt->actual;
812
if (usbhs_pipe_is_busy(pipe))
815
/* use PIO if packet is less than pio_dma_border or pipe is DCP */
816
if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
817
usbhs_pipe_is_dcp(pipe))
818
goto usbhsf_pio_prepare_push;
820
if (len % 4) /* 32bit alignment */
821
goto usbhsf_pio_prepare_push;
823
if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
824
goto usbhsf_pio_prepare_push;
826
/* get enable DMA fifo */
827
fifo = usbhsf_get_dma_fifo(priv, pkt);
829
goto usbhsf_pio_prepare_push;
831
if (usbhsf_dma_map(pkt) < 0)
832
goto usbhsf_pio_prepare_push;
834
ret = usbhsf_fifo_select(pipe, fifo, 0);
836
goto usbhsf_pio_prepare_push_unmap;
840
tasklet_init(&fifo->tasklet,
841
usbhsf_dma_prepare_tasklet,
844
tasklet_schedule(&fifo->tasklet);
848
usbhsf_pio_prepare_push_unmap:
849
usbhsf_dma_unmap(pkt);
850
usbhsf_pio_prepare_push:
852
* change handler to PIO
854
pkt->handler = &usbhs_fifo_pio_push_handler;
856
return pkt->handler->prepare(pkt, is_done);
859
static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
861
struct usbhs_pipe *pipe = pkt->pipe;
863
pkt->actual = pkt->trans;
865
*is_done = !pkt->zero; /* send zero packet ? */
867
usbhsf_dma_stop(pipe, pipe->fifo);
868
usbhsf_dma_unmap(pkt);
869
usbhsf_fifo_unselect(pipe, pipe->fifo);
874
struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
875
.prepare = usbhsf_dma_prepare_push,
876
.dma_done = usbhsf_dma_push_done,
882
static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
884
struct usbhs_pipe *pipe = pkt->pipe;
885
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
886
struct usbhs_fifo *fifo;
889
if (usbhs_pipe_is_busy(pipe))
892
if (usbhs_pipe_is_dcp(pipe))
893
goto usbhsf_pio_prepare_pop;
895
/* get enable DMA fifo */
896
fifo = usbhsf_get_dma_fifo(priv, pkt);
898
goto usbhsf_pio_prepare_pop;
900
if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
901
goto usbhsf_pio_prepare_pop;
903
ret = usbhsf_fifo_select(pipe, fifo, 0);
905
goto usbhsf_pio_prepare_pop;
907
/* use PIO if packet is less than pio_dma_border */
908
len = usbhsf_fifo_rcv_len(priv, fifo);
909
len = min(pkt->length - pkt->actual, len);
910
if (len % 4) /* 32bit alignment */
911
goto usbhsf_pio_prepare_pop_unselect;
913
if (len < usbhs_get_dparam(priv, pio_dma_border))
914
goto usbhsf_pio_prepare_pop_unselect;
916
ret = usbhsf_fifo_barrier(priv, fifo);
918
goto usbhsf_pio_prepare_pop_unselect;
920
if (usbhsf_dma_map(pkt) < 0)
921
goto usbhsf_pio_prepare_pop_unselect;
926
* usbhs_fifo_dma_pop_handler :: prepare
927
* enabled irq to come here.
928
* but it is no longer needed for DMA. disable it.
930
usbhsf_rx_irq_ctrl(pipe, 0);
934
tasklet_init(&fifo->tasklet,
935
usbhsf_dma_prepare_tasklet,
938
tasklet_schedule(&fifo->tasklet);
942
usbhsf_pio_prepare_pop_unselect:
943
usbhsf_fifo_unselect(pipe, fifo);
944
usbhsf_pio_prepare_pop:
947
* change handler to PIO
949
pkt->handler = &usbhs_fifo_pio_pop_handler;
951
return pkt->handler->try_run(pkt, is_done);
954
static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
956
struct usbhs_pipe *pipe = pkt->pipe;
957
int maxp = usbhs_pipe_get_maxpacket(pipe);
959
usbhsf_dma_stop(pipe, pipe->fifo);
960
usbhsf_dma_unmap(pkt);
961
usbhsf_fifo_unselect(pipe, pipe->fifo);
963
pkt->actual += pkt->trans;
965
if ((pkt->actual == pkt->length) || /* receive all data */
966
(pkt->trans < maxp)) { /* short packet */
970
usbhsf_prepare_pop(pkt, is_done);
976
struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
977
.prepare = usbhsf_prepare_pop,
978
.try_run = usbhsf_dma_try_pop,
979
.dma_done = usbhsf_dma_pop_done
985
static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
987
struct sh_dmae_slave *slave = param;
992
* usbhs doesn't recognize id = 0 as valid DMA
994
if (0 == slave->slave_id)
997
chan->private = slave;
1002
static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1005
dma_release_channel(fifo->tx_chan);
1007
dma_release_channel(fifo->rx_chan);
1009
fifo->tx_chan = NULL;
1010
fifo->rx_chan = NULL;
1013
static void usbhsf_dma_init(struct usbhs_priv *priv,
1014
struct usbhs_fifo *fifo)
1016
struct device *dev = usbhs_priv_to_dev(priv);
1017
dma_cap_mask_t mask;
1020
dma_cap_set(DMA_SLAVE, mask);
1021
fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1025
dma_cap_set(DMA_SLAVE, mask);
1026
fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1029
if (fifo->tx_chan || fifo->rx_chan)
1030
dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
1032
fifo->tx_chan ? "[TX]" : " ",
1033
fifo->rx_chan ? "[RX]" : " ");
1039
static int usbhsf_irq_empty(struct usbhs_priv *priv,
1040
struct usbhs_irq_state *irq_state)
1042
struct usbhs_pipe *pipe;
1043
struct device *dev = usbhs_priv_to_dev(priv);
1046
if (!irq_state->bempsts) {
1047
dev_err(dev, "debug %s !!\n", __func__);
1051
dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1054
* search interrupted "pipe"
1057
usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1058
if (!(irq_state->bempsts & (1 << i)))
1061
ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1063
dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1069
static int usbhsf_irq_ready(struct usbhs_priv *priv,
1070
struct usbhs_irq_state *irq_state)
1072
struct usbhs_pipe *pipe;
1073
struct device *dev = usbhs_priv_to_dev(priv);
1076
if (!irq_state->brdysts) {
1077
dev_err(dev, "debug %s !!\n", __func__);
1081
dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1084
* search interrupted "pipe"
1087
usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1088
if (!(irq_state->brdysts & (1 << i)))
1091
ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1093
dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1099
static void usbhsf_dma_complete(void *arg)
1101
struct usbhs_pipe *pipe = arg;
1102
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1103
struct device *dev = usbhs_priv_to_dev(priv);
1106
ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
1108
dev_err(dev, "dma_complete run_error %d : %d\n",
1109
usbhs_pipe_number(pipe), ret);
1115
void usbhs_fifo_init(struct usbhs_priv *priv)
1117
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1118
struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
1119
struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv);
1120
struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv);
1122
mod->irq_empty = usbhsf_irq_empty;
1123
mod->irq_ready = usbhsf_irq_ready;
1124
mod->irq_bempsts = 0;
1125
mod->irq_brdysts = 0;
1128
cfifo->tx_chan = NULL;
1129
cfifo->rx_chan = NULL;
1131
d0fifo->pipe = NULL;
1132
d0fifo->tx_chan = NULL;
1133
d0fifo->rx_chan = NULL;
1135
d1fifo->pipe = NULL;
1136
d1fifo->tx_chan = NULL;
1137
d1fifo->rx_chan = NULL;
1139
usbhsf_dma_init(priv, usbhsf_get_d0fifo(priv));
1140
usbhsf_dma_init(priv, usbhsf_get_d1fifo(priv));
1143
void usbhs_fifo_quit(struct usbhs_priv *priv)
1145
struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1147
mod->irq_empty = NULL;
1148
mod->irq_ready = NULL;
1149
mod->irq_bempsts = 0;
1150
mod->irq_brdysts = 0;
1152
usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv));
1153
usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv));
1156
int usbhs_fifo_probe(struct usbhs_priv *priv)
1158
struct usbhs_fifo *fifo;
1161
fifo = usbhsf_get_cfifo(priv);
1162
fifo->name = "CFIFO";
1164
fifo->sel = CFIFOSEL;
1165
fifo->ctr = CFIFOCTR;
1168
fifo = usbhsf_get_d0fifo(priv);
1169
fifo->name = "D0FIFO";
1170
fifo->port = D0FIFO;
1171
fifo->sel = D0FIFOSEL;
1172
fifo->ctr = D0FIFOCTR;
1173
fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id);
1174
fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id);
1177
fifo = usbhsf_get_d1fifo(priv);
1178
fifo->name = "D1FIFO";
1179
fifo->port = D1FIFO;
1180
fifo->sel = D1FIFOSEL;
1181
fifo->ctr = D1FIFOCTR;
1182
fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id);
1183
fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id);
1188
void usbhs_fifo_remove(struct usbhs_priv *priv)