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 dma_async_tx_descriptor *desc;
775 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
776 struct device *dev = usbhs_priv_to_dev(priv);
777 enum dma_transfer_direction dir;
779 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
781 desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual,
783 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
787 desc->callback = usbhsf_dma_complete;
788 desc->callback_param = pipe;
790 if (dmaengine_submit(desc) < 0) {
791 dev_err(dev, "Failed to submit dma descriptor\n");
795 dev_dbg(dev, " %s %d (%d/ %d)\n",
796 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
798 usbhsf_dma_start(pipe, fifo);
799 dma_async_issue_pending(chan);
805 static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
807 struct usbhs_pipe *pipe = pkt->pipe;
808 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
809 struct usbhs_fifo *fifo;
810 int len = pkt->length - pkt->actual;
813 if (usbhs_pipe_is_busy(pipe))
816 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
817 if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
818 usbhs_pipe_is_dcp(pipe))
819 goto usbhsf_pio_prepare_push;
821 if (len & 0x7) /* 8byte alignment */
822 goto usbhsf_pio_prepare_push;
824 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
825 goto usbhsf_pio_prepare_push;
827 /* get enable DMA fifo */
828 fifo = usbhsf_get_dma_fifo(priv, pkt);
830 goto usbhsf_pio_prepare_push;
832 if (usbhsf_dma_map(pkt) < 0)
833 goto usbhsf_pio_prepare_push;
835 ret = usbhsf_fifo_select(pipe, fifo, 0);
837 goto usbhsf_pio_prepare_push_unmap;
841 INIT_WORK(&pkt->work, xfer_work);
842 schedule_work(&pkt->work);
846 usbhsf_pio_prepare_push_unmap:
847 usbhsf_dma_unmap(pkt);
848 usbhsf_pio_prepare_push:
850 * change handler to PIO
852 pkt->handler = &usbhs_fifo_pio_push_handler;
854 return pkt->handler->prepare(pkt, is_done);
857 static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
859 struct usbhs_pipe *pipe = pkt->pipe;
861 pkt->actual = pkt->trans;
863 *is_done = !pkt->zero; /* send zero packet ? */
865 usbhsf_dma_stop(pipe, pipe->fifo);
866 usbhsf_dma_unmap(pkt);
867 usbhsf_fifo_unselect(pipe, pipe->fifo);
872 struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
873 .prepare = usbhsf_dma_prepare_push,
874 .dma_done = usbhsf_dma_push_done,
880 static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
882 struct usbhs_pipe *pipe = pkt->pipe;
883 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
884 struct usbhs_fifo *fifo;
887 if (usbhs_pipe_is_busy(pipe))
890 if (usbhs_pipe_is_dcp(pipe))
891 goto usbhsf_pio_prepare_pop;
893 /* get enable DMA fifo */
894 fifo = usbhsf_get_dma_fifo(priv, pkt);
896 goto usbhsf_pio_prepare_pop;
898 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
899 goto usbhsf_pio_prepare_pop;
901 ret = usbhsf_fifo_select(pipe, fifo, 0);
903 goto usbhsf_pio_prepare_pop;
905 /* use PIO if packet is less than pio_dma_border */
906 len = usbhsf_fifo_rcv_len(priv, fifo);
907 len = min(pkt->length - pkt->actual, len);
908 if (len & 0x7) /* 8byte alignment */
909 goto usbhsf_pio_prepare_pop_unselect;
911 if (len < usbhs_get_dparam(priv, pio_dma_border))
912 goto usbhsf_pio_prepare_pop_unselect;
914 ret = usbhsf_fifo_barrier(priv, fifo);
916 goto usbhsf_pio_prepare_pop_unselect;
918 if (usbhsf_dma_map(pkt) < 0)
919 goto usbhsf_pio_prepare_pop_unselect;
924 * usbhs_fifo_dma_pop_handler :: prepare
925 * enabled irq to come here.
926 * but it is no longer needed for DMA. disable it.
928 usbhsf_rx_irq_ctrl(pipe, 0);
932 INIT_WORK(&pkt->work, xfer_work);
933 schedule_work(&pkt->work);
937 usbhsf_pio_prepare_pop_unselect:
938 usbhsf_fifo_unselect(pipe, fifo);
939 usbhsf_pio_prepare_pop:
942 * change handler to PIO
944 pkt->handler = &usbhs_fifo_pio_pop_handler;
946 return pkt->handler->try_run(pkt, is_done);
949 static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
951 struct usbhs_pipe *pipe = pkt->pipe;
952 int maxp = usbhs_pipe_get_maxpacket(pipe);
954 usbhsf_dma_stop(pipe, pipe->fifo);
955 usbhsf_dma_unmap(pkt);
956 usbhsf_fifo_unselect(pipe, pipe->fifo);
958 pkt->actual += pkt->trans;
960 if ((pkt->actual == pkt->length) || /* receive all data */
961 (pkt->trans < maxp)) { /* short packet */
965 usbhsf_prepare_pop(pkt, is_done);
971 struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
972 .prepare = usbhsf_prepare_pop,
973 .try_run = usbhsf_dma_try_pop,
974 .dma_done = usbhsf_dma_pop_done
980 static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
982 struct sh_dmae_slave *slave = param;
987 * usbhs doesn't recognize id = 0 as valid DMA
989 if (0 == slave->shdma_slave.slave_id)
992 chan->private = slave;
997 static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1000 dma_release_channel(fifo->tx_chan);
1002 dma_release_channel(fifo->rx_chan);
1004 fifo->tx_chan = NULL;
1005 fifo->rx_chan = NULL;
1008 static void usbhsf_dma_init(struct usbhs_priv *priv,
1009 struct usbhs_fifo *fifo)
1011 struct device *dev = usbhs_priv_to_dev(priv);
1012 dma_cap_mask_t mask;
1015 dma_cap_set(DMA_SLAVE, mask);
1016 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1020 dma_cap_set(DMA_SLAVE, mask);
1021 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1024 if (fifo->tx_chan || fifo->rx_chan)
1025 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
1027 fifo->tx_chan ? "[TX]" : " ",
1028 fifo->rx_chan ? "[RX]" : " ");
1034 static int usbhsf_irq_empty(struct usbhs_priv *priv,
1035 struct usbhs_irq_state *irq_state)
1037 struct usbhs_pipe *pipe;
1038 struct device *dev = usbhs_priv_to_dev(priv);
1041 if (!irq_state->bempsts) {
1042 dev_err(dev, "debug %s !!\n", __func__);
1046 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1049 * search interrupted "pipe"
1052 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1053 if (!(irq_state->bempsts & (1 << i)))
1056 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1058 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1064 static int usbhsf_irq_ready(struct usbhs_priv *priv,
1065 struct usbhs_irq_state *irq_state)
1067 struct usbhs_pipe *pipe;
1068 struct device *dev = usbhs_priv_to_dev(priv);
1071 if (!irq_state->brdysts) {
1072 dev_err(dev, "debug %s !!\n", __func__);
1076 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1079 * search interrupted "pipe"
1082 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1083 if (!(irq_state->brdysts & (1 << i)))
1086 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1088 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1094 static void usbhsf_dma_complete(void *arg)
1096 struct usbhs_pipe *pipe = arg;
1097 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1098 struct device *dev = usbhs_priv_to_dev(priv);
1101 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
1103 dev_err(dev, "dma_complete run_error %d : %d\n",
1104 usbhs_pipe_number(pipe), ret);
1110 void usbhs_fifo_init(struct usbhs_priv *priv)
1112 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1113 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
1114 struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv);
1115 struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv);
1117 mod->irq_empty = usbhsf_irq_empty;
1118 mod->irq_ready = usbhsf_irq_ready;
1119 mod->irq_bempsts = 0;
1120 mod->irq_brdysts = 0;
1123 cfifo->tx_chan = NULL;
1124 cfifo->rx_chan = NULL;
1126 d0fifo->pipe = NULL;
1127 d0fifo->tx_chan = NULL;
1128 d0fifo->rx_chan = NULL;
1130 d1fifo->pipe = NULL;
1131 d1fifo->tx_chan = NULL;
1132 d1fifo->rx_chan = NULL;
1134 usbhsf_dma_init(priv, usbhsf_get_d0fifo(priv));
1135 usbhsf_dma_init(priv, usbhsf_get_d1fifo(priv));
1138 void usbhs_fifo_quit(struct usbhs_priv *priv)
1140 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1142 mod->irq_empty = NULL;
1143 mod->irq_ready = NULL;
1144 mod->irq_bempsts = 0;
1145 mod->irq_brdysts = 0;
1147 usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv));
1148 usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv));
1151 int usbhs_fifo_probe(struct usbhs_priv *priv)
1153 struct usbhs_fifo *fifo;
1156 fifo = usbhsf_get_cfifo(priv);
1157 fifo->name = "CFIFO";
1159 fifo->sel = CFIFOSEL;
1160 fifo->ctr = CFIFOCTR;
1163 fifo = usbhsf_get_d0fifo(priv);
1164 fifo->name = "D0FIFO";
1165 fifo->port = D0FIFO;
1166 fifo->sel = D0FIFOSEL;
1167 fifo->ctr = D0FIFOCTR;
1168 fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id);
1169 fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id);
1172 fifo = usbhsf_get_d1fifo(priv);
1173 fifo->name = "D1FIFO";
1174 fifo->port = D1FIFO;
1175 fifo->sel = D1FIFOSEL;
1176 fifo->ctr = D1FIFOCTR;
1177 fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id);
1178 fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id);
1183 void usbhs_fifo_remove(struct usbhs_priv *priv)