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 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, int sequence)
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_move_tail(&pkt->node, &pipe->list);
81 * each pkt must hold own handler.
82 * because handler might be changed by its situation.
83 * dma handler -> pio handler.
87 pkt->handler = pipe->handler;
92 pkt->sequence = sequence;
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_first_entry(&pipe->list, 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 handler\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, irq_bempsts, e)
195 #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_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->status |= status; \
206 mod->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 if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo))
308 usbhs_write(priv, fifo->sel, base);
310 usbhs_write(priv, fifo->sel, base | MBW_32);
312 /* check ISEL and CURPIPE value */
314 if (base == (mask & usbhs_read(priv, fifo->sel))) {
315 usbhs_pipe_select_fifo(pipe, fifo);
321 dev_err(dev, "fifo select error\n");
329 static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
331 struct usbhs_pipe *pipe = pkt->pipe;
332 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
333 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
334 struct device *dev = usbhs_priv_to_dev(priv);
337 usbhs_pipe_disable(pipe);
339 ret = usbhsf_fifo_select(pipe, fifo, 1);
341 dev_err(dev, "%s() faile\n", __func__);
345 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
347 usbhsf_fifo_clear(pipe, fifo);
348 usbhsf_send_terminator(pipe, fifo);
350 usbhsf_fifo_unselect(pipe, fifo);
352 usbhsf_tx_irq_ctrl(pipe, 1);
353 usbhs_pipe_enable(pipe);
358 static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done)
360 struct usbhs_pipe *pipe = pkt->pipe;
361 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
362 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
363 struct device *dev = usbhs_priv_to_dev(priv);
366 usbhs_pipe_disable(pipe);
368 ret = usbhsf_fifo_select(pipe, fifo, 0);
370 dev_err(dev, "%s() fail\n", __func__);
374 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
375 usbhsf_fifo_clear(pipe, fifo);
377 usbhsf_fifo_unselect(pipe, fifo);
379 usbhsf_rx_irq_ctrl(pipe, 1);
380 usbhs_pipe_enable(pipe);
386 static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done)
388 struct usbhs_pipe *pipe = pkt->pipe;
390 if (pkt->handler == &usbhs_dcp_status_stage_in_handler)
391 usbhsf_tx_irq_ctrl(pipe, 0);
393 usbhsf_rx_irq_ctrl(pipe, 0);
395 pkt->actual = pkt->length;
401 struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = {
402 .prepare = usbhs_dcp_dir_switch_to_write,
403 .try_run = usbhs_dcp_dir_switch_done,
406 struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = {
407 .prepare = usbhs_dcp_dir_switch_to_read,
408 .try_run = usbhs_dcp_dir_switch_done,
412 * DCP data stage (push)
414 static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done)
416 struct usbhs_pipe *pipe = pkt->pipe;
418 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
421 * change handler to PIO push
423 pkt->handler = &usbhs_fifo_pio_push_handler;
425 return pkt->handler->prepare(pkt, is_done);
428 struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = {
429 .prepare = usbhsf_dcp_data_stage_try_push,
433 * DCP data stage (pop)
435 static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt,
438 struct usbhs_pipe *pipe = pkt->pipe;
439 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
440 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
442 if (usbhs_pipe_is_busy(pipe))
446 * prepare pop for DCP should
447 * - change DCP direction,
451 usbhs_pipe_disable(pipe);
453 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
455 usbhsf_fifo_select(pipe, fifo, 0);
456 usbhsf_fifo_clear(pipe, fifo);
457 usbhsf_fifo_unselect(pipe, fifo);
460 * change handler to PIO pop
462 pkt->handler = &usbhs_fifo_pio_pop_handler;
464 return pkt->handler->prepare(pkt, is_done);
467 struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = {
468 .prepare = usbhsf_dcp_data_stage_prepare_pop,
474 static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
476 struct usbhs_pipe *pipe = pkt->pipe;
477 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
478 struct device *dev = usbhs_priv_to_dev(priv);
479 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
480 void __iomem *addr = priv->base + fifo->port;
482 int maxp = usbhs_pipe_get_maxpacket(pipe);
487 usbhs_pipe_data_sequence(pipe, pkt->sequence);
488 pkt->sequence = -1; /* -1 sequence will be ignored */
490 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
492 ret = usbhsf_fifo_select(pipe, fifo, 1);
496 ret = usbhs_pipe_is_accessible(pipe);
498 /* inaccessible pipe is not an error */
500 goto usbhs_fifo_write_busy;
503 ret = usbhsf_fifo_barrier(priv, fifo);
505 goto usbhs_fifo_write_busy;
507 buf = pkt->buf + pkt->actual;
508 len = pkt->length - pkt->actual;
509 len = min(len, maxp);
511 is_short = total_len < maxp;
518 if (len >= 4 && !((unsigned long)buf & 0x03)) {
519 iowrite32_rep(addr, buf, len / 4);
521 buf += total_len - len;
524 /* the rest operation */
525 for (i = 0; i < len; i++)
526 iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
531 pkt->actual += total_len;
533 if (pkt->actual < pkt->length)
534 *is_done = 0; /* there are remainder data */
536 *is_done = 1; /* short packet */
538 *is_done = !pkt->zero; /* send zero packet ? */
544 usbhsf_send_terminator(pipe, fifo);
546 usbhsf_tx_irq_ctrl(pipe, !*is_done);
547 usbhs_pipe_enable(pipe);
549 dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
550 usbhs_pipe_number(pipe),
551 pkt->length, pkt->actual, *is_done, pkt->zero);
557 if (usbhs_pipe_is_dcp(pipe))
558 usbhs_dcp_control_transfer_done(pipe);
561 usbhsf_fifo_unselect(pipe, fifo);
565 usbhs_fifo_write_busy:
566 usbhsf_fifo_unselect(pipe, fifo);
572 usbhsf_tx_irq_ctrl(pipe, 1);
577 struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
578 .prepare = usbhsf_pio_try_push,
579 .try_run = usbhsf_pio_try_push,
585 static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
587 struct usbhs_pipe *pipe = pkt->pipe;
589 if (usbhs_pipe_is_busy(pipe))
593 * pipe enable to prepare packet receive
595 usbhs_pipe_data_sequence(pipe, pkt->sequence);
596 pkt->sequence = -1; /* -1 sequence will be ignored */
598 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
599 usbhs_pipe_enable(pipe);
600 usbhsf_rx_irq_ctrl(pipe, 1);
605 static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
607 struct usbhs_pipe *pipe = pkt->pipe;
608 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
609 struct device *dev = usbhs_priv_to_dev(priv);
610 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
611 void __iomem *addr = priv->base + fifo->port;
614 int maxp = usbhs_pipe_get_maxpacket(pipe);
619 ret = usbhsf_fifo_select(pipe, fifo, 0);
623 ret = usbhsf_fifo_barrier(priv, fifo);
625 goto usbhs_fifo_read_busy;
627 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
629 buf = pkt->buf + pkt->actual;
630 len = pkt->length - pkt->actual;
631 len = min(len, rcv_len);
635 * update actual length first here to decide disable pipe.
636 * if this pipe keeps BUF status and all data were popped,
637 * then, next interrupt/token will be issued again
639 pkt->actual += total_len;
641 if ((pkt->actual == pkt->length) || /* receive all data */
642 (total_len < maxp)) { /* short packet */
644 usbhsf_rx_irq_ctrl(pipe, 0);
645 usbhs_pipe_disable(pipe); /* disable pipe first */
649 * Buffer clear if Zero-Length packet
652 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
656 usbhsf_fifo_clear(pipe, fifo);
657 goto usbhs_fifo_read_end;
665 if (len >= 4 && !((unsigned long)buf & 0x03)) {
666 ioread32_rep(addr, buf, len / 4);
668 buf += total_len - len;
671 /* the rest operation */
672 for (i = 0; i < len; i++) {
674 data = ioread32(addr);
676 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
680 dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
681 usbhs_pipe_number(pipe),
682 pkt->length, pkt->actual, *is_done, pkt->zero);
688 if (usbhs_pipe_is_dcp(pipe))
689 usbhs_dcp_control_transfer_done(pipe);
692 usbhs_fifo_read_busy:
693 usbhsf_fifo_unselect(pipe, fifo);
698 struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
699 .prepare = usbhsf_prepare_pop,
700 .try_run = usbhsf_pio_try_pop,
704 * DCP ctrol statge handler
706 static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
708 usbhs_dcp_control_transfer_done(pkt->pipe);
715 struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
716 .prepare = usbhsf_ctrl_stage_end,
717 .try_run = usbhsf_ctrl_stage_end,
723 static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
724 struct usbhs_pkt *pkt)
726 if (&usbhs_fifo_dma_push_handler == pkt->handler)
727 return fifo->tx_chan;
729 if (&usbhs_fifo_dma_pop_handler == pkt->handler)
730 return fifo->rx_chan;
735 static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
736 struct usbhs_pkt *pkt)
738 struct usbhs_fifo *fifo;
741 fifo = usbhsf_get_d0fifo(priv);
742 if (usbhsf_dma_chan_get(fifo, pkt) &&
743 !usbhsf_fifo_is_busy(fifo))
747 fifo = usbhsf_get_d1fifo(priv);
748 if (usbhsf_dma_chan_get(fifo, pkt) &&
749 !usbhsf_fifo_is_busy(fifo))
755 #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
756 #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
757 static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
758 struct usbhs_fifo *fifo,
761 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
763 usbhs_bset(priv, fifo->sel, DREQE, dreqe);
766 #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
767 #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
768 static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
770 struct usbhs_pipe *pipe = pkt->pipe;
771 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
772 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
774 return info->dma_map_ctrl(pkt, map);
777 static void usbhsf_dma_complete(void *arg);
778 static void xfer_work(struct work_struct *work)
780 struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work);
781 struct usbhs_pipe *pipe = pkt->pipe;
782 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
783 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
784 struct dma_async_tx_descriptor *desc;
785 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
786 struct device *dev = usbhs_priv_to_dev(priv);
787 enum dma_transfer_direction dir;
789 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
791 desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual,
793 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
797 desc->callback = usbhsf_dma_complete;
798 desc->callback_param = pipe;
800 if (dmaengine_submit(desc) < 0) {
801 dev_err(dev, "Failed to submit dma descriptor\n");
805 dev_dbg(dev, " %s %d (%d/ %d)\n",
806 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
808 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans);
809 usbhs_pipe_enable(pipe);
810 usbhsf_dma_start(pipe, fifo);
811 dma_async_issue_pending(chan);
817 static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
819 struct usbhs_pipe *pipe = pkt->pipe;
820 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
821 struct usbhs_fifo *fifo;
822 int len = pkt->length - pkt->actual;
825 if (usbhs_pipe_is_busy(pipe))
828 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
829 if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
830 usbhs_pipe_is_dcp(pipe))
831 goto usbhsf_pio_prepare_push;
833 if (len & 0x7) /* 8byte alignment */
834 goto usbhsf_pio_prepare_push;
836 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
837 goto usbhsf_pio_prepare_push;
839 /* get enable DMA fifo */
840 fifo = usbhsf_get_dma_fifo(priv, pkt);
842 goto usbhsf_pio_prepare_push;
844 if (usbhsf_dma_map(pkt) < 0)
845 goto usbhsf_pio_prepare_push;
847 ret = usbhsf_fifo_select(pipe, fifo, 0);
849 goto usbhsf_pio_prepare_push_unmap;
853 INIT_WORK(&pkt->work, xfer_work);
854 schedule_work(&pkt->work);
858 usbhsf_pio_prepare_push_unmap:
859 usbhsf_dma_unmap(pkt);
860 usbhsf_pio_prepare_push:
862 * change handler to PIO
864 pkt->handler = &usbhs_fifo_pio_push_handler;
866 return pkt->handler->prepare(pkt, is_done);
869 static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
871 struct usbhs_pipe *pipe = pkt->pipe;
873 pkt->actual = pkt->trans;
875 *is_done = !pkt->zero; /* send zero packet ? */
877 usbhsf_dma_stop(pipe, pipe->fifo);
878 usbhsf_dma_unmap(pkt);
879 usbhsf_fifo_unselect(pipe, pipe->fifo);
884 struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
885 .prepare = usbhsf_dma_prepare_push,
886 .dma_done = usbhsf_dma_push_done,
892 static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
894 struct usbhs_pipe *pipe = pkt->pipe;
895 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
896 struct usbhs_fifo *fifo;
899 if (usbhs_pipe_is_busy(pipe))
902 if (usbhs_pipe_is_dcp(pipe))
903 goto usbhsf_pio_prepare_pop;
905 /* get enable DMA fifo */
906 fifo = usbhsf_get_dma_fifo(priv, pkt);
908 goto usbhsf_pio_prepare_pop;
910 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
911 goto usbhsf_pio_prepare_pop;
913 ret = usbhsf_fifo_select(pipe, fifo, 0);
915 goto usbhsf_pio_prepare_pop;
917 /* use PIO if packet is less than pio_dma_border */
918 len = usbhsf_fifo_rcv_len(priv, fifo);
919 len = min(pkt->length - pkt->actual, len);
920 if (len & 0x7) /* 8byte alignment */
921 goto usbhsf_pio_prepare_pop_unselect;
923 if (len < usbhs_get_dparam(priv, pio_dma_border))
924 goto usbhsf_pio_prepare_pop_unselect;
926 ret = usbhsf_fifo_barrier(priv, fifo);
928 goto usbhsf_pio_prepare_pop_unselect;
930 if (usbhsf_dma_map(pkt) < 0)
931 goto usbhsf_pio_prepare_pop_unselect;
936 * usbhs_fifo_dma_pop_handler :: prepare
937 * enabled irq to come here.
938 * but it is no longer needed for DMA. disable it.
940 usbhsf_rx_irq_ctrl(pipe, 0);
944 INIT_WORK(&pkt->work, xfer_work);
945 schedule_work(&pkt->work);
949 usbhsf_pio_prepare_pop_unselect:
950 usbhsf_fifo_unselect(pipe, fifo);
951 usbhsf_pio_prepare_pop:
954 * change handler to PIO
956 pkt->handler = &usbhs_fifo_pio_pop_handler;
958 return pkt->handler->try_run(pkt, is_done);
961 static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
963 struct usbhs_pipe *pipe = pkt->pipe;
964 int maxp = usbhs_pipe_get_maxpacket(pipe);
966 usbhsf_dma_stop(pipe, pipe->fifo);
967 usbhsf_dma_unmap(pkt);
968 usbhsf_fifo_unselect(pipe, pipe->fifo);
970 pkt->actual += pkt->trans;
972 if ((pkt->actual == pkt->length) || /* receive all data */
973 (pkt->trans < maxp)) { /* short packet */
977 usbhsf_prepare_pop(pkt, is_done);
983 struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
984 .prepare = usbhsf_prepare_pop,
985 .try_run = usbhsf_dma_try_pop,
986 .dma_done = usbhsf_dma_pop_done
992 static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
994 struct sh_dmae_slave *slave = param;
999 * usbhs doesn't recognize id = 0 as valid DMA
1001 if (0 == slave->shdma_slave.slave_id)
1004 chan->private = slave;
1009 static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1012 dma_release_channel(fifo->tx_chan);
1014 dma_release_channel(fifo->rx_chan);
1016 fifo->tx_chan = NULL;
1017 fifo->rx_chan = NULL;
1020 static void usbhsf_dma_init(struct usbhs_priv *priv,
1021 struct usbhs_fifo *fifo)
1023 struct device *dev = usbhs_priv_to_dev(priv);
1024 dma_cap_mask_t mask;
1027 dma_cap_set(DMA_SLAVE, mask);
1028 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1032 dma_cap_set(DMA_SLAVE, mask);
1033 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1036 if (fifo->tx_chan || fifo->rx_chan)
1037 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
1039 fifo->tx_chan ? "[TX]" : " ",
1040 fifo->rx_chan ? "[RX]" : " ");
1046 static int usbhsf_irq_empty(struct usbhs_priv *priv,
1047 struct usbhs_irq_state *irq_state)
1049 struct usbhs_pipe *pipe;
1050 struct device *dev = usbhs_priv_to_dev(priv);
1053 if (!irq_state->bempsts) {
1054 dev_err(dev, "debug %s !!\n", __func__);
1058 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1061 * search interrupted "pipe"
1064 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1065 if (!(irq_state->bempsts & (1 << i)))
1068 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1070 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1076 static int usbhsf_irq_ready(struct usbhs_priv *priv,
1077 struct usbhs_irq_state *irq_state)
1079 struct usbhs_pipe *pipe;
1080 struct device *dev = usbhs_priv_to_dev(priv);
1083 if (!irq_state->brdysts) {
1084 dev_err(dev, "debug %s !!\n", __func__);
1088 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1091 * search interrupted "pipe"
1094 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1095 if (!(irq_state->brdysts & (1 << i)))
1098 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1100 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1106 static void usbhsf_dma_complete(void *arg)
1108 struct usbhs_pipe *pipe = arg;
1109 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1110 struct device *dev = usbhs_priv_to_dev(priv);
1113 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
1115 dev_err(dev, "dma_complete run_error %d : %d\n",
1116 usbhs_pipe_number(pipe), ret);
1122 void usbhs_fifo_init(struct usbhs_priv *priv)
1124 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1125 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
1126 struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv);
1127 struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv);
1129 mod->irq_empty = usbhsf_irq_empty;
1130 mod->irq_ready = usbhsf_irq_ready;
1131 mod->irq_bempsts = 0;
1132 mod->irq_brdysts = 0;
1135 d0fifo->pipe = NULL;
1136 d1fifo->pipe = NULL;
1139 void usbhs_fifo_quit(struct usbhs_priv *priv)
1141 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1143 mod->irq_empty = NULL;
1144 mod->irq_ready = NULL;
1145 mod->irq_bempsts = 0;
1146 mod->irq_brdysts = 0;
1149 int usbhs_fifo_probe(struct usbhs_priv *priv)
1151 struct usbhs_fifo *fifo;
1154 fifo = usbhsf_get_cfifo(priv);
1155 fifo->name = "CFIFO";
1157 fifo->sel = CFIFOSEL;
1158 fifo->ctr = CFIFOCTR;
1161 fifo = usbhsf_get_d0fifo(priv);
1162 fifo->name = "D0FIFO";
1163 fifo->port = D0FIFO;
1164 fifo->sel = D0FIFOSEL;
1165 fifo->ctr = D0FIFOCTR;
1166 fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id);
1167 fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id);
1168 usbhsf_dma_init(priv, fifo);
1171 fifo = usbhsf_get_d1fifo(priv);
1172 fifo->name = "D1FIFO";
1173 fifo->port = D1FIFO;
1174 fifo->sel = D1FIFOSEL;
1175 fifo->ctr = D1FIFOCTR;
1176 fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id);
1177 fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id);
1178 usbhsf_dma_init(priv, fifo);
1183 void usbhs_fifo_remove(struct usbhs_priv *priv)
1185 usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv));
1186 usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv));