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))
26 #define usbhsf_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f)
28 #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
33 void usbhs_pkt_init(struct usbhs_pkt
*pkt
)
35 pkt
->dma
= DMA_ADDR_INVALID
;
36 INIT_LIST_HEAD(&pkt
->node
);
40 * packet control function
42 static int usbhsf_null_handle(struct usbhs_pkt
*pkt
, int *is_done
)
44 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pkt
->pipe
);
45 struct device
*dev
= usbhs_priv_to_dev(priv
);
47 dev_err(dev
, "null handler\n");
52 static struct usbhs_pkt_handle usbhsf_null_handler
= {
53 .prepare
= usbhsf_null_handle
,
54 .try_run
= usbhsf_null_handle
,
57 void usbhs_pkt_push(struct usbhs_pipe
*pipe
, struct usbhs_pkt
*pkt
,
58 void (*done
)(struct usbhs_priv
*priv
,
59 struct usbhs_pkt
*pkt
),
60 void *buf
, int len
, int zero
, int sequence
)
62 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
63 struct device
*dev
= usbhs_priv_to_dev(priv
);
67 dev_err(dev
, "no done function\n");
71 /******************** spin lock ********************/
72 usbhs_lock(priv
, flags
);
75 dev_err(dev
, "no handler function\n");
76 pipe
->handler
= &usbhsf_null_handler
;
79 list_move_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
;
93 pkt
->sequence
= sequence
;
95 usbhs_unlock(priv
, flags
);
96 /******************** spin unlock ******************/
99 static void __usbhsf_pkt_del(struct usbhs_pkt
*pkt
)
101 list_del_init(&pkt
->node
);
104 static struct usbhs_pkt
*__usbhsf_pkt_get(struct usbhs_pipe
*pipe
)
106 if (list_empty(&pipe
->list
))
109 return list_first_entry(&pipe
->list
, struct usbhs_pkt
, node
);
112 struct usbhs_pkt
*usbhs_pkt_pop(struct usbhs_pipe
*pipe
, struct usbhs_pkt
*pkt
)
114 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
117 /******************** spin lock ********************/
118 usbhs_lock(priv
, flags
);
121 pkt
= __usbhsf_pkt_get(pipe
);
124 __usbhsf_pkt_del(pkt
);
126 usbhs_unlock(priv
, flags
);
127 /******************** spin unlock ******************/
138 static int usbhsf_pkt_handler(struct usbhs_pipe
*pipe
, int type
)
140 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
141 struct usbhs_pkt
*pkt
;
142 struct device
*dev
= usbhs_priv_to_dev(priv
);
143 int (*func
)(struct usbhs_pkt
*pkt
, int *is_done
);
148 /******************** spin lock ********************/
149 usbhs_lock(priv
, flags
);
151 pkt
= __usbhsf_pkt_get(pipe
);
153 goto __usbhs_pkt_handler_end
;
156 case USBHSF_PKT_PREPARE
:
157 func
= pkt
->handler
->prepare
;
159 case USBHSF_PKT_TRY_RUN
:
160 func
= pkt
->handler
->try_run
;
162 case USBHSF_PKT_DMA_DONE
:
163 func
= pkt
->handler
->dma_done
;
166 dev_err(dev
, "unknown pkt hander\n");
167 goto __usbhs_pkt_handler_end
;
170 ret
= func(pkt
, &is_done
);
173 __usbhsf_pkt_del(pkt
);
175 __usbhs_pkt_handler_end
:
176 usbhs_unlock(priv
, flags
);
177 /******************** spin unlock ******************/
180 pkt
->done(priv
, pkt
);
181 usbhs_pkt_start(pipe
);
187 void usbhs_pkt_start(struct usbhs_pipe
*pipe
)
189 usbhsf_pkt_handler(pipe
, USBHSF_PKT_PREPARE
);
193 * irq enable/disable function
195 #define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, bempsts, e)
196 #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, brdysts, e)
197 #define usbhsf_irq_callback_ctrl(pipe, status, enable) \
199 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \
200 struct usbhs_mod *mod = usbhs_mod_get_current(priv); \
201 u16 status = (1 << usbhs_pipe_number(pipe)); \
205 mod->irq_##status |= status; \
207 mod->irq_##status &= ~status; \
208 usbhs_irq_callback_update(priv, mod); \
211 static void usbhsf_tx_irq_ctrl(struct usbhs_pipe
*pipe
, int enable
)
214 * And DCP pipe can NOT use "ready interrupt" for "send"
215 * it should use "empty" interrupt.
217 * "Operation" - "Interrupt Function" - "BRDY Interrupt"
219 * on the other hand, normal pipe can use "ready interrupt" for "send"
220 * even though it is single/double buffer
222 if (usbhs_pipe_is_dcp(pipe
))
223 usbhsf_irq_empty_ctrl(pipe
, enable
);
225 usbhsf_irq_ready_ctrl(pipe
, enable
);
228 static void usbhsf_rx_irq_ctrl(struct usbhs_pipe
*pipe
, int enable
)
230 usbhsf_irq_ready_ctrl(pipe
, enable
);
236 static void usbhsf_send_terminator(struct usbhs_pipe
*pipe
,
237 struct usbhs_fifo
*fifo
)
239 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
241 usbhs_bset(priv
, fifo
->ctr
, BVAL
, BVAL
);
244 static int usbhsf_fifo_barrier(struct usbhs_priv
*priv
,
245 struct usbhs_fifo
*fifo
)
250 /* The FIFO port is accessible */
251 if (usbhs_read(priv
, fifo
->ctr
) & FRDY
)
260 static void usbhsf_fifo_clear(struct usbhs_pipe
*pipe
,
261 struct usbhs_fifo
*fifo
)
263 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
265 if (!usbhs_pipe_is_dcp(pipe
))
266 usbhsf_fifo_barrier(priv
, fifo
);
268 usbhs_write(priv
, fifo
->ctr
, BCLR
);
271 static int usbhsf_fifo_rcv_len(struct usbhs_priv
*priv
,
272 struct usbhs_fifo
*fifo
)
274 return usbhs_read(priv
, fifo
->ctr
) & DTLN_MASK
;
277 static void usbhsf_fifo_unselect(struct usbhs_pipe
*pipe
,
278 struct usbhs_fifo
*fifo
)
280 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
282 usbhs_pipe_select_fifo(pipe
, NULL
);
283 usbhs_write(priv
, fifo
->sel
, 0);
286 static int usbhsf_fifo_select(struct usbhs_pipe
*pipe
,
287 struct usbhs_fifo
*fifo
,
290 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
291 struct device
*dev
= usbhs_priv_to_dev(priv
);
293 u16 mask
= ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
294 u16 base
= usbhs_pipe_number(pipe
); /* CURPIPE */
296 if (usbhs_pipe_is_busy(pipe
) ||
297 usbhsf_fifo_is_busy(fifo
))
300 if (usbhs_pipe_is_dcp(pipe
)) {
301 base
|= (1 == write
) << 5; /* ISEL */
303 if (usbhs_mod_is_host(priv
))
304 usbhs_dcp_dir_for_host(pipe
, write
);
307 /* "base" will be used below */
308 if (usbhs_get_dparam(priv
, has_sudmac
) && !usbhsf_is_cfifo(priv
, fifo
))
309 usbhs_write(priv
, fifo
->sel
, base
);
311 usbhs_write(priv
, fifo
->sel
, base
| MBW_32
);
313 /* check ISEL and CURPIPE value */
315 if (base
== (mask
& usbhs_read(priv
, fifo
->sel
))) {
316 usbhs_pipe_select_fifo(pipe
, fifo
);
322 dev_err(dev
, "fifo select error\n");
330 static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt
*pkt
, int *is_done
)
332 struct usbhs_pipe
*pipe
= pkt
->pipe
;
333 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
334 struct usbhs_fifo
*fifo
= usbhsf_get_cfifo(priv
); /* CFIFO */
335 struct device
*dev
= usbhs_priv_to_dev(priv
);
338 usbhs_pipe_disable(pipe
);
340 ret
= usbhsf_fifo_select(pipe
, fifo
, 1);
342 dev_err(dev
, "%s() faile\n", __func__
);
346 usbhs_pipe_sequence_data1(pipe
); /* DATA1 */
348 usbhsf_fifo_clear(pipe
, fifo
);
349 usbhsf_send_terminator(pipe
, fifo
);
351 usbhsf_fifo_unselect(pipe
, fifo
);
353 usbhsf_tx_irq_ctrl(pipe
, 1);
354 usbhs_pipe_enable(pipe
);
359 static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt
*pkt
, int *is_done
)
361 struct usbhs_pipe
*pipe
= pkt
->pipe
;
362 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
363 struct usbhs_fifo
*fifo
= usbhsf_get_cfifo(priv
); /* CFIFO */
364 struct device
*dev
= usbhs_priv_to_dev(priv
);
367 usbhs_pipe_disable(pipe
);
369 ret
= usbhsf_fifo_select(pipe
, fifo
, 0);
371 dev_err(dev
, "%s() fail\n", __func__
);
375 usbhs_pipe_sequence_data1(pipe
); /* DATA1 */
376 usbhsf_fifo_clear(pipe
, fifo
);
378 usbhsf_fifo_unselect(pipe
, fifo
);
380 usbhsf_rx_irq_ctrl(pipe
, 1);
381 usbhs_pipe_enable(pipe
);
387 static int usbhs_dcp_dir_switch_done(struct usbhs_pkt
*pkt
, int *is_done
)
389 struct usbhs_pipe
*pipe
= pkt
->pipe
;
391 if (pkt
->handler
== &usbhs_dcp_status_stage_in_handler
)
392 usbhsf_tx_irq_ctrl(pipe
, 0);
394 usbhsf_rx_irq_ctrl(pipe
, 0);
396 pkt
->actual
= pkt
->length
;
402 struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler
= {
403 .prepare
= usbhs_dcp_dir_switch_to_write
,
404 .try_run
= usbhs_dcp_dir_switch_done
,
407 struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler
= {
408 .prepare
= usbhs_dcp_dir_switch_to_read
,
409 .try_run
= usbhs_dcp_dir_switch_done
,
413 * DCP data stage (push)
415 static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt
*pkt
, int *is_done
)
417 struct usbhs_pipe
*pipe
= pkt
->pipe
;
419 usbhs_pipe_sequence_data1(pipe
); /* DATA1 */
422 * change handler to PIO push
424 pkt
->handler
= &usbhs_fifo_pio_push_handler
;
426 return pkt
->handler
->prepare(pkt
, is_done
);
429 struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler
= {
430 .prepare
= usbhsf_dcp_data_stage_try_push
,
434 * DCP data stage (pop)
436 static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt
*pkt
,
439 struct usbhs_pipe
*pipe
= pkt
->pipe
;
440 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
441 struct usbhs_fifo
*fifo
= usbhsf_get_cfifo(priv
);
443 if (usbhs_pipe_is_busy(pipe
))
447 * prepare pop for DCP should
448 * - change DCP direction,
452 usbhs_pipe_disable(pipe
);
454 usbhs_pipe_sequence_data1(pipe
); /* DATA1 */
456 usbhsf_fifo_select(pipe
, fifo
, 0);
457 usbhsf_fifo_clear(pipe
, fifo
);
458 usbhsf_fifo_unselect(pipe
, fifo
);
461 * change handler to PIO pop
463 pkt
->handler
= &usbhs_fifo_pio_pop_handler
;
465 return pkt
->handler
->prepare(pkt
, is_done
);
468 struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler
= {
469 .prepare
= usbhsf_dcp_data_stage_prepare_pop
,
475 static int usbhsf_pio_try_push(struct usbhs_pkt
*pkt
, int *is_done
)
477 struct usbhs_pipe
*pipe
= pkt
->pipe
;
478 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
479 struct device
*dev
= usbhs_priv_to_dev(priv
);
480 struct usbhs_fifo
*fifo
= usbhsf_get_cfifo(priv
); /* CFIFO */
481 void __iomem
*addr
= priv
->base
+ fifo
->port
;
483 int maxp
= usbhs_pipe_get_maxpacket(pipe
);
488 usbhs_pipe_data_sequence(pipe
, pkt
->sequence
);
489 pkt
->sequence
= -1; /* -1 sequence will be ignored */
491 ret
= usbhsf_fifo_select(pipe
, fifo
, 1);
495 ret
= usbhs_pipe_is_accessible(pipe
);
497 /* inaccessible pipe is not an error */
499 goto usbhs_fifo_write_busy
;
502 ret
= usbhsf_fifo_barrier(priv
, fifo
);
504 goto usbhs_fifo_write_busy
;
506 buf
= pkt
->buf
+ pkt
->actual
;
507 len
= pkt
->length
- pkt
->actual
;
508 len
= min(len
, maxp
);
510 is_short
= total_len
< maxp
;
517 if (len
>= 4 && !((unsigned long)buf
& 0x03)) {
518 iowrite32_rep(addr
, buf
, len
/ 4);
520 buf
+= total_len
- len
;
523 /* the rest operation */
524 for (i
= 0; i
< len
; i
++)
525 iowrite8(buf
[i
], addr
+ (0x03 - (i
& 0x03)));
530 pkt
->actual
+= total_len
;
532 if (pkt
->actual
< pkt
->length
)
533 *is_done
= 0; /* there are remainder data */
535 *is_done
= 1; /* short packet */
537 *is_done
= !pkt
->zero
; /* send zero packet ? */
543 usbhsf_send_terminator(pipe
, fifo
);
545 usbhsf_tx_irq_ctrl(pipe
, !*is_done
);
546 usbhs_pipe_enable(pipe
);
548 dev_dbg(dev
, " send %d (%d/ %d/ %d/ %d)\n",
549 usbhs_pipe_number(pipe
),
550 pkt
->length
, pkt
->actual
, *is_done
, pkt
->zero
);
556 if (usbhs_pipe_is_dcp(pipe
))
557 usbhs_dcp_control_transfer_done(pipe
);
560 usbhsf_fifo_unselect(pipe
, fifo
);
564 usbhs_fifo_write_busy
:
565 usbhsf_fifo_unselect(pipe
, fifo
);
571 usbhsf_tx_irq_ctrl(pipe
, 1);
576 struct usbhs_pkt_handle usbhs_fifo_pio_push_handler
= {
577 .prepare
= usbhsf_pio_try_push
,
578 .try_run
= usbhsf_pio_try_push
,
584 static int usbhsf_prepare_pop(struct usbhs_pkt
*pkt
, int *is_done
)
586 struct usbhs_pipe
*pipe
= pkt
->pipe
;
588 if (usbhs_pipe_is_busy(pipe
))
592 * pipe enable to prepare packet receive
594 usbhs_pipe_data_sequence(pipe
, pkt
->sequence
);
595 pkt
->sequence
= -1; /* -1 sequence will be ignored */
597 usbhs_pipe_enable(pipe
);
598 usbhsf_rx_irq_ctrl(pipe
, 1);
603 static int usbhsf_pio_try_pop(struct usbhs_pkt
*pkt
, int *is_done
)
605 struct usbhs_pipe
*pipe
= pkt
->pipe
;
606 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
607 struct device
*dev
= usbhs_priv_to_dev(priv
);
608 struct usbhs_fifo
*fifo
= usbhsf_get_cfifo(priv
); /* CFIFO */
609 void __iomem
*addr
= priv
->base
+ fifo
->port
;
612 int maxp
= usbhs_pipe_get_maxpacket(pipe
);
617 ret
= usbhsf_fifo_select(pipe
, fifo
, 0);
621 ret
= usbhsf_fifo_barrier(priv
, fifo
);
623 goto usbhs_fifo_read_busy
;
625 rcv_len
= usbhsf_fifo_rcv_len(priv
, fifo
);
627 buf
= pkt
->buf
+ pkt
->actual
;
628 len
= pkt
->length
- pkt
->actual
;
629 len
= min(len
, rcv_len
);
633 * update actual length first here to decide disable pipe.
634 * if this pipe keeps BUF status and all data were popped,
635 * then, next interrupt/token will be issued again
637 pkt
->actual
+= total_len
;
639 if ((pkt
->actual
== pkt
->length
) || /* receive all data */
640 (total_len
< maxp
)) { /* short packet */
642 usbhsf_rx_irq_ctrl(pipe
, 0);
643 usbhs_pipe_disable(pipe
); /* disable pipe first */
647 * Buffer clear if Zero-Length packet
650 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
654 usbhsf_fifo_clear(pipe
, fifo
);
655 goto usbhs_fifo_read_end
;
663 if (len
>= 4 && !((unsigned long)buf
& 0x03)) {
664 ioread32_rep(addr
, buf
, len
/ 4);
666 buf
+= total_len
- len
;
669 /* the rest operation */
670 for (i
= 0; i
< len
; i
++) {
672 data
= ioread32(addr
);
674 buf
[i
] = (data
>> ((i
& 0x03) * 8)) & 0xff;
678 dev_dbg(dev
, " recv %d (%d/ %d/ %d/ %d)\n",
679 usbhs_pipe_number(pipe
),
680 pkt
->length
, pkt
->actual
, *is_done
, pkt
->zero
);
682 usbhs_fifo_read_busy
:
683 usbhsf_fifo_unselect(pipe
, fifo
);
688 struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler
= {
689 .prepare
= usbhsf_prepare_pop
,
690 .try_run
= usbhsf_pio_try_pop
,
694 * DCP ctrol statge handler
696 static int usbhsf_ctrl_stage_end(struct usbhs_pkt
*pkt
, int *is_done
)
698 usbhs_dcp_control_transfer_done(pkt
->pipe
);
705 struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler
= {
706 .prepare
= usbhsf_ctrl_stage_end
,
707 .try_run
= usbhsf_ctrl_stage_end
,
713 static struct dma_chan
*usbhsf_dma_chan_get(struct usbhs_fifo
*fifo
,
714 struct usbhs_pkt
*pkt
)
716 if (&usbhs_fifo_dma_push_handler
== pkt
->handler
)
717 return fifo
->tx_chan
;
719 if (&usbhs_fifo_dma_pop_handler
== pkt
->handler
)
720 return fifo
->rx_chan
;
725 static struct usbhs_fifo
*usbhsf_get_dma_fifo(struct usbhs_priv
*priv
,
726 struct usbhs_pkt
*pkt
)
728 struct usbhs_fifo
*fifo
;
731 fifo
= usbhsf_get_d0fifo(priv
);
732 if (usbhsf_dma_chan_get(fifo
, pkt
) &&
733 !usbhsf_fifo_is_busy(fifo
))
737 fifo
= usbhsf_get_d1fifo(priv
);
738 if (usbhsf_dma_chan_get(fifo
, pkt
) &&
739 !usbhsf_fifo_is_busy(fifo
))
745 #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
746 #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
747 static void __usbhsf_dma_ctrl(struct usbhs_pipe
*pipe
,
748 struct usbhs_fifo
*fifo
,
751 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
753 usbhs_bset(priv
, fifo
->sel
, DREQE
, dreqe
);
756 #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
757 #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
758 static int __usbhsf_dma_map_ctrl(struct usbhs_pkt
*pkt
, int map
)
760 struct usbhs_pipe
*pipe
= pkt
->pipe
;
761 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
762 struct usbhs_pipe_info
*info
= usbhs_priv_to_pipeinfo(priv
);
764 return info
->dma_map_ctrl(pkt
, map
);
767 static void usbhsf_dma_complete(void *arg
);
768 static void xfer_work(struct work_struct
*work
)
770 struct usbhs_pkt
*pkt
= container_of(work
, struct usbhs_pkt
, work
);
771 struct usbhs_pipe
*pipe
= pkt
->pipe
;
772 struct usbhs_fifo
*fifo
= usbhs_pipe_to_fifo(pipe
);
773 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
774 struct scatterlist sg
;
775 struct dma_async_tx_descriptor
*desc
;
776 struct dma_chan
*chan
= usbhsf_dma_chan_get(fifo
, pkt
);
777 struct device
*dev
= usbhs_priv_to_dev(priv
);
778 enum dma_transfer_direction dir
;
781 dir
= usbhs_pipe_is_dir_in(pipe
) ? DMA_DEV_TO_MEM
: DMA_MEM_TO_DEV
;
783 sg_init_table(&sg
, 1);
784 sg_set_page(&sg
, virt_to_page(pkt
->dma
),
785 pkt
->length
, offset_in_page(pkt
->dma
));
786 sg_dma_address(&sg
) = pkt
->dma
+ pkt
->actual
;
787 sg_dma_len(&sg
) = pkt
->trans
;
789 desc
= chan
->device
->device_prep_slave_sg(chan
, &sg
, 1, dir
,
795 desc
->callback
= usbhsf_dma_complete
;
796 desc
->callback_param
= pipe
;
798 cookie
= desc
->tx_submit(desc
);
800 dev_err(dev
, "Failed to submit dma descriptor\n");
804 dev_dbg(dev
, " %s %d (%d/ %d)\n",
805 fifo
->name
, usbhs_pipe_number(pipe
), pkt
->length
, pkt
->zero
);
807 usbhsf_dma_start(pipe
, fifo
);
808 dma_async_issue_pending(chan
);
814 static int usbhsf_dma_prepare_push(struct usbhs_pkt
*pkt
, int *is_done
)
816 struct usbhs_pipe
*pipe
= pkt
->pipe
;
817 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
818 struct usbhs_fifo
*fifo
;
819 int len
= pkt
->length
- pkt
->actual
;
822 if (usbhs_pipe_is_busy(pipe
))
825 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
826 if ((len
< usbhs_get_dparam(priv
, pio_dma_border
)) ||
827 usbhs_pipe_is_dcp(pipe
))
828 goto usbhsf_pio_prepare_push
;
830 if (len
% 4) /* 32bit alignment */
831 goto usbhsf_pio_prepare_push
;
833 if ((uintptr_t)(pkt
->buf
+ pkt
->actual
) & 0x7) /* 8byte alignment */
834 goto usbhsf_pio_prepare_push
;
836 /* get enable DMA fifo */
837 fifo
= usbhsf_get_dma_fifo(priv
, pkt
);
839 goto usbhsf_pio_prepare_push
;
841 if (usbhsf_dma_map(pkt
) < 0)
842 goto usbhsf_pio_prepare_push
;
844 ret
= usbhsf_fifo_select(pipe
, fifo
, 0);
846 goto usbhsf_pio_prepare_push_unmap
;
850 INIT_WORK(&pkt
->work
, xfer_work
);
851 schedule_work(&pkt
->work
);
855 usbhsf_pio_prepare_push_unmap
:
856 usbhsf_dma_unmap(pkt
);
857 usbhsf_pio_prepare_push
:
859 * change handler to PIO
861 pkt
->handler
= &usbhs_fifo_pio_push_handler
;
863 return pkt
->handler
->prepare(pkt
, is_done
);
866 static int usbhsf_dma_push_done(struct usbhs_pkt
*pkt
, int *is_done
)
868 struct usbhs_pipe
*pipe
= pkt
->pipe
;
870 pkt
->actual
= pkt
->trans
;
872 *is_done
= !pkt
->zero
; /* send zero packet ? */
874 usbhsf_dma_stop(pipe
, pipe
->fifo
);
875 usbhsf_dma_unmap(pkt
);
876 usbhsf_fifo_unselect(pipe
, pipe
->fifo
);
881 struct usbhs_pkt_handle usbhs_fifo_dma_push_handler
= {
882 .prepare
= usbhsf_dma_prepare_push
,
883 .dma_done
= usbhsf_dma_push_done
,
889 static int usbhsf_dma_try_pop(struct usbhs_pkt
*pkt
, int *is_done
)
891 struct usbhs_pipe
*pipe
= pkt
->pipe
;
892 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
893 struct usbhs_fifo
*fifo
;
896 if (usbhs_pipe_is_busy(pipe
))
899 if (usbhs_pipe_is_dcp(pipe
))
900 goto usbhsf_pio_prepare_pop
;
902 /* get enable DMA fifo */
903 fifo
= usbhsf_get_dma_fifo(priv
, pkt
);
905 goto usbhsf_pio_prepare_pop
;
907 if ((uintptr_t)(pkt
->buf
+ pkt
->actual
) & 0x7) /* 8byte alignment */
908 goto usbhsf_pio_prepare_pop
;
910 ret
= usbhsf_fifo_select(pipe
, fifo
, 0);
912 goto usbhsf_pio_prepare_pop
;
914 /* use PIO if packet is less than pio_dma_border */
915 len
= usbhsf_fifo_rcv_len(priv
, fifo
);
916 len
= min(pkt
->length
- pkt
->actual
, len
);
917 if (len
% 4) /* 32bit alignment */
918 goto usbhsf_pio_prepare_pop_unselect
;
920 if (len
< usbhs_get_dparam(priv
, pio_dma_border
))
921 goto usbhsf_pio_prepare_pop_unselect
;
923 ret
= usbhsf_fifo_barrier(priv
, fifo
);
925 goto usbhsf_pio_prepare_pop_unselect
;
927 if (usbhsf_dma_map(pkt
) < 0)
928 goto usbhsf_pio_prepare_pop_unselect
;
933 * usbhs_fifo_dma_pop_handler :: prepare
934 * enabled irq to come here.
935 * but it is no longer needed for DMA. disable it.
937 usbhsf_rx_irq_ctrl(pipe
, 0);
941 INIT_WORK(&pkt
->work
, xfer_work
);
942 schedule_work(&pkt
->work
);
946 usbhsf_pio_prepare_pop_unselect
:
947 usbhsf_fifo_unselect(pipe
, fifo
);
948 usbhsf_pio_prepare_pop
:
951 * change handler to PIO
953 pkt
->handler
= &usbhs_fifo_pio_pop_handler
;
955 return pkt
->handler
->try_run(pkt
, is_done
);
958 static int usbhsf_dma_pop_done(struct usbhs_pkt
*pkt
, int *is_done
)
960 struct usbhs_pipe
*pipe
= pkt
->pipe
;
961 int maxp
= usbhs_pipe_get_maxpacket(pipe
);
963 usbhsf_dma_stop(pipe
, pipe
->fifo
);
964 usbhsf_dma_unmap(pkt
);
965 usbhsf_fifo_unselect(pipe
, pipe
->fifo
);
967 pkt
->actual
+= pkt
->trans
;
969 if ((pkt
->actual
== pkt
->length
) || /* receive all data */
970 (pkt
->trans
< maxp
)) { /* short packet */
974 usbhsf_prepare_pop(pkt
, is_done
);
980 struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler
= {
981 .prepare
= usbhsf_prepare_pop
,
982 .try_run
= usbhsf_dma_try_pop
,
983 .dma_done
= usbhsf_dma_pop_done
989 static bool usbhsf_dma_filter(struct dma_chan
*chan
, void *param
)
991 struct sh_dmae_slave
*slave
= param
;
996 * usbhs doesn't recognize id = 0 as valid DMA
998 if (0 == slave
->slave_id
)
1001 chan
->private = slave
;
1006 static void usbhsf_dma_quit(struct usbhs_priv
*priv
, struct usbhs_fifo
*fifo
)
1009 dma_release_channel(fifo
->tx_chan
);
1011 dma_release_channel(fifo
->rx_chan
);
1013 fifo
->tx_chan
= NULL
;
1014 fifo
->rx_chan
= NULL
;
1017 static void usbhsf_dma_init(struct usbhs_priv
*priv
,
1018 struct usbhs_fifo
*fifo
)
1020 struct device
*dev
= usbhs_priv_to_dev(priv
);
1021 dma_cap_mask_t mask
;
1024 dma_cap_set(DMA_SLAVE
, mask
);
1025 fifo
->tx_chan
= dma_request_channel(mask
, usbhsf_dma_filter
,
1029 dma_cap_set(DMA_SLAVE
, mask
);
1030 fifo
->rx_chan
= dma_request_channel(mask
, usbhsf_dma_filter
,
1033 if (fifo
->tx_chan
|| fifo
->rx_chan
)
1034 dev_dbg(dev
, "enable DMAEngine (%s%s%s)\n",
1036 fifo
->tx_chan
? "[TX]" : " ",
1037 fifo
->rx_chan
? "[RX]" : " ");
1043 static int usbhsf_irq_empty(struct usbhs_priv
*priv
,
1044 struct usbhs_irq_state
*irq_state
)
1046 struct usbhs_pipe
*pipe
;
1047 struct device
*dev
= usbhs_priv_to_dev(priv
);
1050 if (!irq_state
->bempsts
) {
1051 dev_err(dev
, "debug %s !!\n", __func__
);
1055 dev_dbg(dev
, "irq empty [0x%04x]\n", irq_state
->bempsts
);
1058 * search interrupted "pipe"
1061 usbhs_for_each_pipe_with_dcp(pipe
, priv
, i
) {
1062 if (!(irq_state
->bempsts
& (1 << i
)))
1065 ret
= usbhsf_pkt_handler(pipe
, USBHSF_PKT_TRY_RUN
);
1067 dev_err(dev
, "irq_empty run_error %d : %d\n", i
, ret
);
1073 static int usbhsf_irq_ready(struct usbhs_priv
*priv
,
1074 struct usbhs_irq_state
*irq_state
)
1076 struct usbhs_pipe
*pipe
;
1077 struct device
*dev
= usbhs_priv_to_dev(priv
);
1080 if (!irq_state
->brdysts
) {
1081 dev_err(dev
, "debug %s !!\n", __func__
);
1085 dev_dbg(dev
, "irq ready [0x%04x]\n", irq_state
->brdysts
);
1088 * search interrupted "pipe"
1091 usbhs_for_each_pipe_with_dcp(pipe
, priv
, i
) {
1092 if (!(irq_state
->brdysts
& (1 << i
)))
1095 ret
= usbhsf_pkt_handler(pipe
, USBHSF_PKT_TRY_RUN
);
1097 dev_err(dev
, "irq_ready run_error %d : %d\n", i
, ret
);
1103 static void usbhsf_dma_complete(void *arg
)
1105 struct usbhs_pipe
*pipe
= arg
;
1106 struct usbhs_priv
*priv
= usbhs_pipe_to_priv(pipe
);
1107 struct device
*dev
= usbhs_priv_to_dev(priv
);
1110 ret
= usbhsf_pkt_handler(pipe
, USBHSF_PKT_DMA_DONE
);
1112 dev_err(dev
, "dma_complete run_error %d : %d\n",
1113 usbhs_pipe_number(pipe
), ret
);
1119 void usbhs_fifo_init(struct usbhs_priv
*priv
)
1121 struct usbhs_mod
*mod
= usbhs_mod_get_current(priv
);
1122 struct usbhs_fifo
*cfifo
= usbhsf_get_cfifo(priv
);
1123 struct usbhs_fifo
*d0fifo
= usbhsf_get_d0fifo(priv
);
1124 struct usbhs_fifo
*d1fifo
= usbhsf_get_d1fifo(priv
);
1126 mod
->irq_empty
= usbhsf_irq_empty
;
1127 mod
->irq_ready
= usbhsf_irq_ready
;
1128 mod
->irq_bempsts
= 0;
1129 mod
->irq_brdysts
= 0;
1132 cfifo
->tx_chan
= NULL
;
1133 cfifo
->rx_chan
= NULL
;
1135 d0fifo
->pipe
= NULL
;
1136 d0fifo
->tx_chan
= NULL
;
1137 d0fifo
->rx_chan
= NULL
;
1139 d1fifo
->pipe
= NULL
;
1140 d1fifo
->tx_chan
= NULL
;
1141 d1fifo
->rx_chan
= NULL
;
1143 usbhsf_dma_init(priv
, usbhsf_get_d0fifo(priv
));
1144 usbhsf_dma_init(priv
, usbhsf_get_d1fifo(priv
));
1147 void usbhs_fifo_quit(struct usbhs_priv
*priv
)
1149 struct usbhs_mod
*mod
= usbhs_mod_get_current(priv
);
1151 mod
->irq_empty
= NULL
;
1152 mod
->irq_ready
= NULL
;
1153 mod
->irq_bempsts
= 0;
1154 mod
->irq_brdysts
= 0;
1156 usbhsf_dma_quit(priv
, usbhsf_get_d0fifo(priv
));
1157 usbhsf_dma_quit(priv
, usbhsf_get_d1fifo(priv
));
1160 int usbhs_fifo_probe(struct usbhs_priv
*priv
)
1162 struct usbhs_fifo
*fifo
;
1165 fifo
= usbhsf_get_cfifo(priv
);
1166 fifo
->name
= "CFIFO";
1168 fifo
->sel
= CFIFOSEL
;
1169 fifo
->ctr
= CFIFOCTR
;
1172 fifo
= usbhsf_get_d0fifo(priv
);
1173 fifo
->name
= "D0FIFO";
1174 fifo
->port
= D0FIFO
;
1175 fifo
->sel
= D0FIFOSEL
;
1176 fifo
->ctr
= D0FIFOCTR
;
1177 fifo
->tx_slave
.slave_id
= usbhs_get_dparam(priv
, d0_tx_id
);
1178 fifo
->rx_slave
.slave_id
= usbhs_get_dparam(priv
, d0_rx_id
);
1181 fifo
= usbhsf_get_d1fifo(priv
);
1182 fifo
->name
= "D1FIFO";
1183 fifo
->port
= D1FIFO
;
1184 fifo
->sel
= D1FIFOSEL
;
1185 fifo
->ctr
= D1FIFOCTR
;
1186 fifo
->tx_slave
.slave_id
= usbhs_get_dparam(priv
, d1_tx_id
);
1187 fifo
->rx_slave
.slave_id
= usbhs_get_dparam(priv
, d1_rx_id
);
1192 void usbhs_fifo_remove(struct usbhs_priv
*priv
)