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_running(pipe, !*is_done);
548 usbhs_pipe_enable(pipe);
550 dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
551 usbhs_pipe_number(pipe),
552 pkt->length, pkt->actual, *is_done, pkt->zero);
558 if (usbhs_pipe_is_dcp(pipe))
559 usbhs_dcp_control_transfer_done(pipe);
562 usbhsf_fifo_unselect(pipe, fifo);
566 usbhs_fifo_write_busy:
567 usbhsf_fifo_unselect(pipe, fifo);
573 usbhsf_tx_irq_ctrl(pipe, 1);
574 usbhs_pipe_running(pipe, 1);
579 static int usbhsf_pio_prepare_push(struct usbhs_pkt *pkt, int *is_done)
581 if (usbhs_pipe_is_running(pkt->pipe))
584 return usbhsf_pio_try_push(pkt, is_done);
587 struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
588 .prepare = usbhsf_pio_prepare_push,
589 .try_run = usbhsf_pio_try_push,
595 static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
597 struct usbhs_pipe *pipe = pkt->pipe;
599 if (usbhs_pipe_is_busy(pipe))
602 if (usbhs_pipe_is_running(pipe))
606 * pipe enable to prepare packet receive
608 usbhs_pipe_data_sequence(pipe, pkt->sequence);
609 pkt->sequence = -1; /* -1 sequence will be ignored */
611 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
612 usbhs_pipe_enable(pipe);
613 usbhs_pipe_running(pipe, 1);
614 usbhsf_rx_irq_ctrl(pipe, 1);
619 static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
621 struct usbhs_pipe *pipe = pkt->pipe;
622 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
623 struct device *dev = usbhs_priv_to_dev(priv);
624 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
625 void __iomem *addr = priv->base + fifo->port;
628 int maxp = usbhs_pipe_get_maxpacket(pipe);
633 ret = usbhsf_fifo_select(pipe, fifo, 0);
637 ret = usbhsf_fifo_barrier(priv, fifo);
639 goto usbhs_fifo_read_busy;
641 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
643 buf = pkt->buf + pkt->actual;
644 len = pkt->length - pkt->actual;
645 len = min(len, rcv_len);
649 * update actual length first here to decide disable pipe.
650 * if this pipe keeps BUF status and all data were popped,
651 * then, next interrupt/token will be issued again
653 pkt->actual += total_len;
655 if ((pkt->actual == pkt->length) || /* receive all data */
656 (total_len < maxp)) { /* short packet */
658 usbhsf_rx_irq_ctrl(pipe, 0);
659 usbhs_pipe_running(pipe, 0);
660 usbhs_pipe_disable(pipe); /* disable pipe first */
664 * Buffer clear if Zero-Length packet
667 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
671 usbhsf_fifo_clear(pipe, fifo);
672 goto usbhs_fifo_read_end;
680 if (len >= 4 && !((unsigned long)buf & 0x03)) {
681 ioread32_rep(addr, buf, len / 4);
683 buf += total_len - len;
686 /* the rest operation */
687 for (i = 0; i < len; i++) {
689 data = ioread32(addr);
691 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
695 dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
696 usbhs_pipe_number(pipe),
697 pkt->length, pkt->actual, *is_done, pkt->zero);
703 if (usbhs_pipe_is_dcp(pipe))
704 usbhs_dcp_control_transfer_done(pipe);
707 usbhs_fifo_read_busy:
708 usbhsf_fifo_unselect(pipe, fifo);
713 struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
714 .prepare = usbhsf_prepare_pop,
715 .try_run = usbhsf_pio_try_pop,
719 * DCP ctrol statge handler
721 static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
723 usbhs_dcp_control_transfer_done(pkt->pipe);
730 struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
731 .prepare = usbhsf_ctrl_stage_end,
732 .try_run = usbhsf_ctrl_stage_end,
738 static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
739 struct usbhs_pkt *pkt)
741 if (&usbhs_fifo_dma_push_handler == pkt->handler)
742 return fifo->tx_chan;
744 if (&usbhs_fifo_dma_pop_handler == pkt->handler)
745 return fifo->rx_chan;
750 static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
751 struct usbhs_pkt *pkt)
753 struct usbhs_fifo *fifo;
756 fifo = usbhsf_get_d0fifo(priv);
757 if (usbhsf_dma_chan_get(fifo, pkt) &&
758 !usbhsf_fifo_is_busy(fifo))
762 fifo = usbhsf_get_d1fifo(priv);
763 if (usbhsf_dma_chan_get(fifo, pkt) &&
764 !usbhsf_fifo_is_busy(fifo))
770 #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
771 #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
772 static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
773 struct usbhs_fifo *fifo,
776 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
778 usbhs_bset(priv, fifo->sel, DREQE, dreqe);
781 #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
782 #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
783 static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
785 struct usbhs_pipe *pipe = pkt->pipe;
786 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
787 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
789 return info->dma_map_ctrl(pkt, map);
792 static void usbhsf_dma_complete(void *arg);
793 static void xfer_work(struct work_struct *work)
795 struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work);
796 struct usbhs_pipe *pipe = pkt->pipe;
797 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
798 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
799 struct dma_async_tx_descriptor *desc;
800 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
801 struct device *dev = usbhs_priv_to_dev(priv);
802 enum dma_transfer_direction dir;
804 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
806 desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual,
808 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
812 desc->callback = usbhsf_dma_complete;
813 desc->callback_param = pipe;
815 if (dmaengine_submit(desc) < 0) {
816 dev_err(dev, "Failed to submit dma descriptor\n");
820 dev_dbg(dev, " %s %d (%d/ %d)\n",
821 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
823 usbhs_pipe_running(pipe, 1);
824 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans);
825 usbhs_pipe_enable(pipe);
826 usbhsf_dma_start(pipe, fifo);
827 dma_async_issue_pending(chan);
833 static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
835 struct usbhs_pipe *pipe = pkt->pipe;
836 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
837 struct usbhs_fifo *fifo;
838 int len = pkt->length - pkt->actual;
841 if (usbhs_pipe_is_busy(pipe))
844 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
845 if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
846 usbhs_pipe_is_dcp(pipe))
847 goto usbhsf_pio_prepare_push;
849 if (len & 0x7) /* 8byte alignment */
850 goto usbhsf_pio_prepare_push;
852 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
853 goto usbhsf_pio_prepare_push;
855 /* return at this time if the pipe is running */
856 if (usbhs_pipe_is_running(pipe))
859 /* get enable DMA fifo */
860 fifo = usbhsf_get_dma_fifo(priv, pkt);
862 goto usbhsf_pio_prepare_push;
864 if (usbhsf_dma_map(pkt) < 0)
865 goto usbhsf_pio_prepare_push;
867 ret = usbhsf_fifo_select(pipe, fifo, 0);
869 goto usbhsf_pio_prepare_push_unmap;
873 INIT_WORK(&pkt->work, xfer_work);
874 schedule_work(&pkt->work);
878 usbhsf_pio_prepare_push_unmap:
879 usbhsf_dma_unmap(pkt);
880 usbhsf_pio_prepare_push:
882 * change handler to PIO
884 pkt->handler = &usbhs_fifo_pio_push_handler;
886 return pkt->handler->prepare(pkt, is_done);
889 static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
891 struct usbhs_pipe *pipe = pkt->pipe;
893 pkt->actual = pkt->trans;
895 *is_done = !pkt->zero; /* send zero packet ? */
896 usbhs_pipe_running(pipe, !*is_done);
898 usbhsf_dma_stop(pipe, pipe->fifo);
899 usbhsf_dma_unmap(pkt);
900 usbhsf_fifo_unselect(pipe, pipe->fifo);
905 struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
906 .prepare = usbhsf_dma_prepare_push,
907 .dma_done = usbhsf_dma_push_done,
913 static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
915 struct usbhs_pipe *pipe = pkt->pipe;
916 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
917 struct usbhs_fifo *fifo;
920 if (usbhs_pipe_is_busy(pipe))
923 if (usbhs_pipe_is_dcp(pipe))
924 goto usbhsf_pio_prepare_pop;
926 /* get enable DMA fifo */
927 fifo = usbhsf_get_dma_fifo(priv, pkt);
929 goto usbhsf_pio_prepare_pop;
931 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
932 goto usbhsf_pio_prepare_pop;
934 ret = usbhsf_fifo_select(pipe, fifo, 0);
936 goto usbhsf_pio_prepare_pop;
938 /* use PIO if packet is less than pio_dma_border */
939 len = usbhsf_fifo_rcv_len(priv, fifo);
940 len = min(pkt->length - pkt->actual, len);
941 if (len & 0x7) /* 8byte alignment */
942 goto usbhsf_pio_prepare_pop_unselect;
944 if (len < usbhs_get_dparam(priv, pio_dma_border))
945 goto usbhsf_pio_prepare_pop_unselect;
947 ret = usbhsf_fifo_barrier(priv, fifo);
949 goto usbhsf_pio_prepare_pop_unselect;
951 if (usbhsf_dma_map(pkt) < 0)
952 goto usbhsf_pio_prepare_pop_unselect;
957 * usbhs_fifo_dma_pop_handler :: prepare
958 * enabled irq to come here.
959 * but it is no longer needed for DMA. disable it.
961 usbhsf_rx_irq_ctrl(pipe, 0);
965 INIT_WORK(&pkt->work, xfer_work);
966 schedule_work(&pkt->work);
970 usbhsf_pio_prepare_pop_unselect:
971 usbhsf_fifo_unselect(pipe, fifo);
972 usbhsf_pio_prepare_pop:
975 * change handler to PIO
977 pkt->handler = &usbhs_fifo_pio_pop_handler;
979 return pkt->handler->try_run(pkt, is_done);
982 static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
984 struct usbhs_pipe *pipe = pkt->pipe;
985 int maxp = usbhs_pipe_get_maxpacket(pipe);
987 usbhsf_dma_stop(pipe, pipe->fifo);
988 usbhsf_dma_unmap(pkt);
989 usbhsf_fifo_unselect(pipe, pipe->fifo);
991 pkt->actual += pkt->trans;
993 if ((pkt->actual == pkt->length) || /* receive all data */
994 (pkt->trans < maxp)) { /* short packet */
996 usbhs_pipe_running(pipe, 0);
999 usbhs_pipe_running(pipe, 0);
1000 usbhsf_prepare_pop(pkt, is_done);
1006 struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
1007 .prepare = usbhsf_prepare_pop,
1008 .try_run = usbhsf_dma_try_pop,
1009 .dma_done = usbhsf_dma_pop_done
1015 static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
1017 struct sh_dmae_slave *slave = param;
1022 * usbhs doesn't recognize id = 0 as valid DMA
1024 if (0 == slave->shdma_slave.slave_id)
1027 chan->private = slave;
1032 static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1035 dma_release_channel(fifo->tx_chan);
1037 dma_release_channel(fifo->rx_chan);
1039 fifo->tx_chan = NULL;
1040 fifo->rx_chan = NULL;
1043 static void usbhsf_dma_init(struct usbhs_priv *priv,
1044 struct usbhs_fifo *fifo)
1046 struct device *dev = usbhs_priv_to_dev(priv);
1047 dma_cap_mask_t mask;
1050 dma_cap_set(DMA_SLAVE, mask);
1051 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1055 dma_cap_set(DMA_SLAVE, mask);
1056 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1059 if (fifo->tx_chan || fifo->rx_chan)
1060 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
1062 fifo->tx_chan ? "[TX]" : " ",
1063 fifo->rx_chan ? "[RX]" : " ");
1069 static int usbhsf_irq_empty(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->bempsts) {
1077 dev_err(dev, "debug %s !!\n", __func__);
1081 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1084 * search interrupted "pipe"
1087 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1088 if (!(irq_state->bempsts & (1 << i)))
1091 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1093 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1099 static int usbhsf_irq_ready(struct usbhs_priv *priv,
1100 struct usbhs_irq_state *irq_state)
1102 struct usbhs_pipe *pipe;
1103 struct device *dev = usbhs_priv_to_dev(priv);
1106 if (!irq_state->brdysts) {
1107 dev_err(dev, "debug %s !!\n", __func__);
1111 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1114 * search interrupted "pipe"
1117 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1118 if (!(irq_state->brdysts & (1 << i)))
1121 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1123 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1129 static void usbhsf_dma_complete(void *arg)
1131 struct usbhs_pipe *pipe = arg;
1132 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1133 struct device *dev = usbhs_priv_to_dev(priv);
1136 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
1138 dev_err(dev, "dma_complete run_error %d : %d\n",
1139 usbhs_pipe_number(pipe), ret);
1145 void usbhs_fifo_init(struct usbhs_priv *priv)
1147 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1148 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
1149 struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv);
1150 struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv);
1152 mod->irq_empty = usbhsf_irq_empty;
1153 mod->irq_ready = usbhsf_irq_ready;
1154 mod->irq_bempsts = 0;
1155 mod->irq_brdysts = 0;
1158 d0fifo->pipe = NULL;
1159 d1fifo->pipe = NULL;
1162 void usbhs_fifo_quit(struct usbhs_priv *priv)
1164 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1166 mod->irq_empty = NULL;
1167 mod->irq_ready = NULL;
1168 mod->irq_bempsts = 0;
1169 mod->irq_brdysts = 0;
1172 int usbhs_fifo_probe(struct usbhs_priv *priv)
1174 struct usbhs_fifo *fifo;
1177 fifo = usbhsf_get_cfifo(priv);
1178 fifo->name = "CFIFO";
1180 fifo->sel = CFIFOSEL;
1181 fifo->ctr = CFIFOCTR;
1184 fifo = usbhsf_get_d0fifo(priv);
1185 fifo->name = "D0FIFO";
1186 fifo->port = D0FIFO;
1187 fifo->sel = D0FIFOSEL;
1188 fifo->ctr = D0FIFOCTR;
1189 fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id);
1190 fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id);
1191 usbhsf_dma_init(priv, fifo);
1194 fifo = usbhsf_get_d1fifo(priv);
1195 fifo->name = "D1FIFO";
1196 fifo->port = D1FIFO;
1197 fifo->sel = D1FIFOSEL;
1198 fifo->ctr = D1FIFOCTR;
1199 fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id);
1200 fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id);
1201 usbhsf_dma_init(priv, fifo);
1206 void usbhs_fifo_remove(struct usbhs_priv *priv)
1208 usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv));
1209 usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv));