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_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f)
26 #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
31 void usbhs_pkt_init(struct usbhs_pkt *pkt)
33 INIT_LIST_HEAD(&pkt->node);
37 * packet control function
39 static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done)
41 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
42 struct device *dev = usbhs_priv_to_dev(priv);
44 dev_err(dev, "null handler\n");
49 static struct usbhs_pkt_handle usbhsf_null_handler = {
50 .prepare = usbhsf_null_handle,
51 .try_run = usbhsf_null_handle,
54 void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
55 void (*done)(struct usbhs_priv *priv,
56 struct usbhs_pkt *pkt),
57 void *buf, int len, int zero, int sequence)
59 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
60 struct device *dev = usbhs_priv_to_dev(priv);
64 dev_err(dev, "no done function\n");
68 /******************** spin lock ********************/
69 usbhs_lock(priv, flags);
72 dev_err(dev, "no handler function\n");
73 pipe->handler = &usbhsf_null_handler;
76 list_move_tail(&pkt->node, &pipe->list);
79 * each pkt must hold own handler.
80 * because handler might be changed by its situation.
81 * dma handler -> pio handler.
85 pkt->handler = pipe->handler;
90 pkt->sequence = sequence;
92 usbhs_unlock(priv, flags);
93 /******************** spin unlock ******************/
96 static void __usbhsf_pkt_del(struct usbhs_pkt *pkt)
98 list_del_init(&pkt->node);
101 static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe)
103 if (list_empty(&pipe->list))
106 return list_first_entry(&pipe->list, struct usbhs_pkt, node);
109 static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
110 struct usbhs_fifo *fifo);
111 static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
112 struct usbhs_fifo *fifo);
113 static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
114 struct usbhs_pkt *pkt);
115 #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
116 #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
117 static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map);
118 struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
120 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
121 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
124 /******************** spin lock ********************/
125 usbhs_lock(priv, flags);
127 usbhs_pipe_disable(pipe);
130 pkt = __usbhsf_pkt_get(pipe);
133 struct dma_chan *chan = NULL;
136 chan = usbhsf_dma_chan_get(fifo, pkt);
138 dmaengine_terminate_all(chan);
139 usbhsf_fifo_clear(pipe, fifo);
140 usbhsf_dma_unmap(pkt);
143 __usbhsf_pkt_del(pkt);
147 usbhsf_fifo_unselect(pipe, fifo);
149 usbhs_unlock(priv, flags);
150 /******************** spin unlock ******************/
161 static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type)
163 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
164 struct usbhs_pkt *pkt;
165 struct device *dev = usbhs_priv_to_dev(priv);
166 int (*func)(struct usbhs_pkt *pkt, int *is_done);
171 /******************** spin lock ********************/
172 usbhs_lock(priv, flags);
174 pkt = __usbhsf_pkt_get(pipe);
176 goto __usbhs_pkt_handler_end;
179 case USBHSF_PKT_PREPARE:
180 func = pkt->handler->prepare;
182 case USBHSF_PKT_TRY_RUN:
183 func = pkt->handler->try_run;
185 case USBHSF_PKT_DMA_DONE:
186 func = pkt->handler->dma_done;
189 dev_err(dev, "unknown pkt handler\n");
190 goto __usbhs_pkt_handler_end;
194 ret = func(pkt, &is_done);
197 __usbhsf_pkt_del(pkt);
199 __usbhs_pkt_handler_end:
200 usbhs_unlock(priv, flags);
201 /******************** spin unlock ******************/
204 pkt->done(priv, pkt);
205 usbhs_pkt_start(pipe);
211 void usbhs_pkt_start(struct usbhs_pipe *pipe)
213 usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE);
217 * irq enable/disable function
219 #define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_bempsts, e)
220 #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_brdysts, e)
221 #define usbhsf_irq_callback_ctrl(pipe, status, enable) \
223 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \
224 struct usbhs_mod *mod = usbhs_mod_get_current(priv); \
225 u16 status = (1 << usbhs_pipe_number(pipe)); \
229 mod->status |= status; \
231 mod->status &= ~status; \
232 usbhs_irq_callback_update(priv, mod); \
235 static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
238 * And DCP pipe can NOT use "ready interrupt" for "send"
239 * it should use "empty" interrupt.
241 * "Operation" - "Interrupt Function" - "BRDY Interrupt"
243 * on the other hand, normal pipe can use "ready interrupt" for "send"
244 * even though it is single/double buffer
246 if (usbhs_pipe_is_dcp(pipe))
247 usbhsf_irq_empty_ctrl(pipe, enable);
249 usbhsf_irq_ready_ctrl(pipe, enable);
252 static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
254 usbhsf_irq_ready_ctrl(pipe, enable);
260 static void usbhsf_send_terminator(struct usbhs_pipe *pipe,
261 struct usbhs_fifo *fifo)
263 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
265 usbhs_bset(priv, fifo->ctr, BVAL, BVAL);
268 static int usbhsf_fifo_barrier(struct usbhs_priv *priv,
269 struct usbhs_fifo *fifo)
274 /* The FIFO port is accessible */
275 if (usbhs_read(priv, fifo->ctr) & FRDY)
284 static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
285 struct usbhs_fifo *fifo)
287 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
289 if (!usbhs_pipe_is_dcp(pipe))
290 usbhsf_fifo_barrier(priv, fifo);
292 usbhs_write(priv, fifo->ctr, BCLR);
295 static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv,
296 struct usbhs_fifo *fifo)
298 return usbhs_read(priv, fifo->ctr) & DTLN_MASK;
301 static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
302 struct usbhs_fifo *fifo)
304 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
306 usbhs_pipe_select_fifo(pipe, NULL);
307 usbhs_write(priv, fifo->sel, 0);
310 static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
311 struct usbhs_fifo *fifo,
314 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
315 struct device *dev = usbhs_priv_to_dev(priv);
317 u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
318 u16 base = usbhs_pipe_number(pipe); /* CURPIPE */
320 if (usbhs_pipe_is_busy(pipe) ||
321 usbhsf_fifo_is_busy(fifo))
324 if (usbhs_pipe_is_dcp(pipe)) {
325 base |= (1 == write) << 5; /* ISEL */
327 if (usbhs_mod_is_host(priv))
328 usbhs_dcp_dir_for_host(pipe, write);
331 /* "base" will be used below */
332 if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo))
333 usbhs_write(priv, fifo->sel, base);
335 usbhs_write(priv, fifo->sel, base | MBW_32);
337 /* check ISEL and CURPIPE value */
339 if (base == (mask & usbhs_read(priv, fifo->sel))) {
340 usbhs_pipe_select_fifo(pipe, fifo);
346 dev_err(dev, "fifo select error\n");
354 static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
356 struct usbhs_pipe *pipe = pkt->pipe;
357 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
358 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
359 struct device *dev = usbhs_priv_to_dev(priv);
362 usbhs_pipe_disable(pipe);
364 ret = usbhsf_fifo_select(pipe, fifo, 1);
366 dev_err(dev, "%s() faile\n", __func__);
370 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
372 usbhsf_fifo_clear(pipe, fifo);
373 usbhsf_send_terminator(pipe, fifo);
375 usbhsf_fifo_unselect(pipe, fifo);
377 usbhsf_tx_irq_ctrl(pipe, 1);
378 usbhs_pipe_enable(pipe);
383 static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done)
385 struct usbhs_pipe *pipe = pkt->pipe;
386 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
387 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
388 struct device *dev = usbhs_priv_to_dev(priv);
391 usbhs_pipe_disable(pipe);
393 ret = usbhsf_fifo_select(pipe, fifo, 0);
395 dev_err(dev, "%s() fail\n", __func__);
399 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
400 usbhsf_fifo_clear(pipe, fifo);
402 usbhsf_fifo_unselect(pipe, fifo);
404 usbhsf_rx_irq_ctrl(pipe, 1);
405 usbhs_pipe_enable(pipe);
411 static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done)
413 struct usbhs_pipe *pipe = pkt->pipe;
415 if (pkt->handler == &usbhs_dcp_status_stage_in_handler)
416 usbhsf_tx_irq_ctrl(pipe, 0);
418 usbhsf_rx_irq_ctrl(pipe, 0);
420 pkt->actual = pkt->length;
426 struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = {
427 .prepare = usbhs_dcp_dir_switch_to_write,
428 .try_run = usbhs_dcp_dir_switch_done,
431 struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = {
432 .prepare = usbhs_dcp_dir_switch_to_read,
433 .try_run = usbhs_dcp_dir_switch_done,
437 * DCP data stage (push)
439 static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done)
441 struct usbhs_pipe *pipe = pkt->pipe;
443 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
446 * change handler to PIO push
448 pkt->handler = &usbhs_fifo_pio_push_handler;
450 return pkt->handler->prepare(pkt, is_done);
453 struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = {
454 .prepare = usbhsf_dcp_data_stage_try_push,
458 * DCP data stage (pop)
460 static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt,
463 struct usbhs_pipe *pipe = pkt->pipe;
464 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
465 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
467 if (usbhs_pipe_is_busy(pipe))
471 * prepare pop for DCP should
472 * - change DCP direction,
476 usbhs_pipe_disable(pipe);
478 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
480 usbhsf_fifo_select(pipe, fifo, 0);
481 usbhsf_fifo_clear(pipe, fifo);
482 usbhsf_fifo_unselect(pipe, fifo);
485 * change handler to PIO pop
487 pkt->handler = &usbhs_fifo_pio_pop_handler;
489 return pkt->handler->prepare(pkt, is_done);
492 struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = {
493 .prepare = usbhsf_dcp_data_stage_prepare_pop,
499 static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
501 struct usbhs_pipe *pipe = pkt->pipe;
502 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
503 struct device *dev = usbhs_priv_to_dev(priv);
504 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
505 void __iomem *addr = priv->base + fifo->port;
507 int maxp = usbhs_pipe_get_maxpacket(pipe);
512 usbhs_pipe_data_sequence(pipe, pkt->sequence);
513 pkt->sequence = -1; /* -1 sequence will be ignored */
515 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
517 ret = usbhsf_fifo_select(pipe, fifo, 1);
521 ret = usbhs_pipe_is_accessible(pipe);
523 /* inaccessible pipe is not an error */
525 goto usbhs_fifo_write_busy;
528 ret = usbhsf_fifo_barrier(priv, fifo);
530 goto usbhs_fifo_write_busy;
532 buf = pkt->buf + pkt->actual;
533 len = pkt->length - pkt->actual;
534 len = min(len, maxp);
536 is_short = total_len < maxp;
543 if (len >= 4 && !((unsigned long)buf & 0x03)) {
544 iowrite32_rep(addr, buf, len / 4);
546 buf += total_len - len;
549 /* the rest operation */
550 for (i = 0; i < len; i++)
551 iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
556 pkt->actual += total_len;
558 if (pkt->actual < pkt->length)
559 *is_done = 0; /* there are remainder data */
561 *is_done = 1; /* short packet */
563 *is_done = !pkt->zero; /* send zero packet ? */
569 usbhsf_send_terminator(pipe, fifo);
571 usbhsf_tx_irq_ctrl(pipe, !*is_done);
572 usbhs_pipe_running(pipe, !*is_done);
573 usbhs_pipe_enable(pipe);
575 dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
576 usbhs_pipe_number(pipe),
577 pkt->length, pkt->actual, *is_done, pkt->zero);
579 usbhsf_fifo_unselect(pipe, fifo);
583 usbhs_fifo_write_busy:
584 usbhsf_fifo_unselect(pipe, fifo);
590 usbhsf_tx_irq_ctrl(pipe, 1);
591 usbhs_pipe_running(pipe, 1);
596 static int usbhsf_pio_prepare_push(struct usbhs_pkt *pkt, int *is_done)
598 if (usbhs_pipe_is_running(pkt->pipe))
601 return usbhsf_pio_try_push(pkt, is_done);
604 struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
605 .prepare = usbhsf_pio_prepare_push,
606 .try_run = usbhsf_pio_try_push,
612 static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
614 struct usbhs_pipe *pipe = pkt->pipe;
615 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
616 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
618 if (usbhs_pipe_is_busy(pipe))
621 if (usbhs_pipe_is_running(pipe))
625 * pipe enable to prepare packet receive
627 usbhs_pipe_data_sequence(pipe, pkt->sequence);
628 pkt->sequence = -1; /* -1 sequence will be ignored */
630 if (usbhs_pipe_is_dcp(pipe))
631 usbhsf_fifo_clear(pipe, fifo);
633 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
634 usbhs_pipe_enable(pipe);
635 usbhs_pipe_running(pipe, 1);
636 usbhsf_rx_irq_ctrl(pipe, 1);
641 static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
643 struct usbhs_pipe *pipe = pkt->pipe;
644 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
645 struct device *dev = usbhs_priv_to_dev(priv);
646 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
647 void __iomem *addr = priv->base + fifo->port;
650 int maxp = usbhs_pipe_get_maxpacket(pipe);
655 ret = usbhsf_fifo_select(pipe, fifo, 0);
659 ret = usbhsf_fifo_barrier(priv, fifo);
661 goto usbhs_fifo_read_busy;
663 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
665 buf = pkt->buf + pkt->actual;
666 len = pkt->length - pkt->actual;
667 len = min(len, rcv_len);
671 * update actual length first here to decide disable pipe.
672 * if this pipe keeps BUF status and all data were popped,
673 * then, next interrupt/token will be issued again
675 pkt->actual += total_len;
677 if ((pkt->actual == pkt->length) || /* receive all data */
678 (total_len < maxp)) { /* short packet */
680 usbhsf_rx_irq_ctrl(pipe, 0);
681 usbhs_pipe_running(pipe, 0);
683 * If function mode, since this controller is possible to enter
684 * Control Write status stage at this timing, this driver
685 * should not disable the pipe. If such a case happens, this
686 * controller is not able to complete the status stage.
688 if (!usbhs_mod_is_host(priv) && !usbhs_pipe_is_dcp(pipe))
689 usbhs_pipe_disable(pipe); /* disable pipe first */
693 * Buffer clear if Zero-Length packet
696 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
700 usbhsf_fifo_clear(pipe, fifo);
701 goto usbhs_fifo_read_end;
709 if (len >= 4 && !((unsigned long)buf & 0x03)) {
710 ioread32_rep(addr, buf, len / 4);
712 buf += total_len - len;
715 /* the rest operation */
716 for (i = 0; i < len; i++) {
718 data = ioread32(addr);
720 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
724 dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
725 usbhs_pipe_number(pipe),
726 pkt->length, pkt->actual, *is_done, pkt->zero);
728 usbhs_fifo_read_busy:
729 usbhsf_fifo_unselect(pipe, fifo);
734 struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
735 .prepare = usbhsf_prepare_pop,
736 .try_run = usbhsf_pio_try_pop,
740 * DCP ctrol statge handler
742 static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
744 usbhs_dcp_control_transfer_done(pkt->pipe);
751 struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
752 .prepare = usbhsf_ctrl_stage_end,
753 .try_run = usbhsf_ctrl_stage_end,
759 static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
760 struct usbhs_pkt *pkt)
762 if (&usbhs_fifo_dma_push_handler == pkt->handler)
763 return fifo->tx_chan;
765 if (&usbhs_fifo_dma_pop_handler == pkt->handler)
766 return fifo->rx_chan;
771 static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
772 struct usbhs_pkt *pkt)
774 struct usbhs_fifo *fifo;
777 usbhs_for_each_dfifo(priv, fifo, i) {
778 if (usbhsf_dma_chan_get(fifo, pkt) &&
779 !usbhsf_fifo_is_busy(fifo))
786 #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
787 #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
788 static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
789 struct usbhs_fifo *fifo,
792 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
794 usbhs_bset(priv, fifo->sel, DREQE, dreqe);
797 static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
799 struct usbhs_pipe *pipe = pkt->pipe;
800 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
801 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
803 return info->dma_map_ctrl(pkt, map);
806 static void usbhsf_dma_complete(void *arg);
807 static void xfer_work(struct work_struct *work)
809 struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work);
810 struct usbhs_pipe *pipe = pkt->pipe;
811 struct usbhs_fifo *fifo;
812 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
813 struct dma_async_tx_descriptor *desc;
814 struct dma_chan *chan;
815 struct device *dev = usbhs_priv_to_dev(priv);
816 enum dma_transfer_direction dir;
819 usbhs_lock(priv, flags);
820 fifo = usbhs_pipe_to_fifo(pipe);
824 chan = usbhsf_dma_chan_get(fifo, pkt);
825 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
827 desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual,
829 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
833 desc->callback = usbhsf_dma_complete;
834 desc->callback_param = pipe;
836 pkt->cookie = dmaengine_submit(desc);
837 if (pkt->cookie < 0) {
838 dev_err(dev, "Failed to submit dma descriptor\n");
842 dev_dbg(dev, " %s %d (%d/ %d)\n",
843 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
845 usbhs_pipe_running(pipe, 1);
846 usbhsf_dma_start(pipe, fifo);
847 usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans);
848 dma_async_issue_pending(chan);
849 usbhs_pipe_enable(pipe);
852 usbhs_unlock(priv, flags);
858 static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
860 struct usbhs_pipe *pipe = pkt->pipe;
861 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
862 struct usbhs_fifo *fifo;
863 int len = pkt->length - pkt->actual;
865 uintptr_t align_mask;
867 if (usbhs_pipe_is_busy(pipe))
870 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
871 if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
872 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
873 goto usbhsf_pio_prepare_push;
875 /* check data length if this driver don't use USB-DMAC */
876 if (!usbhs_get_dparam(priv, has_usb_dmac) && len & 0x7)
877 goto usbhsf_pio_prepare_push;
879 /* check buffer alignment */
880 align_mask = usbhs_get_dparam(priv, has_usb_dmac) ?
881 USBHS_USB_DMAC_XFER_SIZE - 1 : 0x7;
882 if ((uintptr_t)(pkt->buf + pkt->actual) & align_mask)
883 goto usbhsf_pio_prepare_push;
885 /* return at this time if the pipe is running */
886 if (usbhs_pipe_is_running(pipe))
889 /* get enable DMA fifo */
890 fifo = usbhsf_get_dma_fifo(priv, pkt);
892 goto usbhsf_pio_prepare_push;
894 if (usbhsf_dma_map(pkt) < 0)
895 goto usbhsf_pio_prepare_push;
897 ret = usbhsf_fifo_select(pipe, fifo, 0);
899 goto usbhsf_pio_prepare_push_unmap;
903 usbhsf_tx_irq_ctrl(pipe, 0);
904 INIT_WORK(&pkt->work, xfer_work);
905 schedule_work(&pkt->work);
909 usbhsf_pio_prepare_push_unmap:
910 usbhsf_dma_unmap(pkt);
911 usbhsf_pio_prepare_push:
913 * change handler to PIO
915 pkt->handler = &usbhs_fifo_pio_push_handler;
917 return pkt->handler->prepare(pkt, is_done);
920 static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
922 struct usbhs_pipe *pipe = pkt->pipe;
923 int is_short = pkt->trans % usbhs_pipe_get_maxpacket(pipe);
925 pkt->actual += pkt->trans;
927 if (pkt->actual < pkt->length)
928 *is_done = 0; /* there are remainder data */
930 *is_done = 1; /* short packet */
932 *is_done = !pkt->zero; /* send zero packet? */
934 usbhs_pipe_running(pipe, !*is_done);
936 usbhsf_dma_stop(pipe, pipe->fifo);
937 usbhsf_dma_unmap(pkt);
938 usbhsf_fifo_unselect(pipe, pipe->fifo);
941 /* change handler to PIO */
942 pkt->handler = &usbhs_fifo_pio_push_handler;
943 return pkt->handler->try_run(pkt, is_done);
949 struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
950 .prepare = usbhsf_dma_prepare_push,
951 .dma_done = usbhsf_dma_push_done,
958 static int usbhsf_dma_prepare_pop_with_rx_irq(struct usbhs_pkt *pkt,
961 return usbhsf_prepare_pop(pkt, is_done);
964 static int usbhsf_dma_prepare_pop_with_usb_dmac(struct usbhs_pkt *pkt,
967 struct usbhs_pipe *pipe = pkt->pipe;
968 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
969 struct usbhs_fifo *fifo;
972 if (usbhs_pipe_is_busy(pipe))
975 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
976 if ((pkt->length < usbhs_get_dparam(priv, pio_dma_border)) ||
977 usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
978 goto usbhsf_pio_prepare_pop;
980 fifo = usbhsf_get_dma_fifo(priv, pkt);
982 goto usbhsf_pio_prepare_pop;
984 if ((uintptr_t)pkt->buf & (USBHS_USB_DMAC_XFER_SIZE - 1))
985 goto usbhsf_pio_prepare_pop;
987 usbhs_pipe_config_change_bfre(pipe, 1);
989 ret = usbhsf_fifo_select(pipe, fifo, 0);
991 goto usbhsf_pio_prepare_pop;
993 if (usbhsf_dma_map(pkt) < 0)
994 goto usbhsf_pio_prepare_pop_unselect;
999 * usbhs_fifo_dma_pop_handler :: prepare
1000 * enabled irq to come here.
1001 * but it is no longer needed for DMA. disable it.
1003 usbhsf_rx_irq_ctrl(pipe, 0);
1005 pkt->trans = pkt->length;
1007 INIT_WORK(&pkt->work, xfer_work);
1008 schedule_work(&pkt->work);
1012 usbhsf_pio_prepare_pop_unselect:
1013 usbhsf_fifo_unselect(pipe, fifo);
1014 usbhsf_pio_prepare_pop:
1017 * change handler to PIO
1019 pkt->handler = &usbhs_fifo_pio_pop_handler;
1020 usbhs_pipe_config_change_bfre(pipe, 0);
1022 return pkt->handler->prepare(pkt, is_done);
1025 static int usbhsf_dma_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
1027 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1029 if (usbhs_get_dparam(priv, has_usb_dmac))
1030 return usbhsf_dma_prepare_pop_with_usb_dmac(pkt, is_done);
1032 return usbhsf_dma_prepare_pop_with_rx_irq(pkt, is_done);
1035 static int usbhsf_dma_try_pop_with_rx_irq(struct usbhs_pkt *pkt, int *is_done)
1037 struct usbhs_pipe *pipe = pkt->pipe;
1038 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1039 struct usbhs_fifo *fifo;
1042 if (usbhs_pipe_is_busy(pipe))
1045 if (usbhs_pipe_is_dcp(pipe))
1046 goto usbhsf_pio_prepare_pop;
1048 /* get enable DMA fifo */
1049 fifo = usbhsf_get_dma_fifo(priv, pkt);
1051 goto usbhsf_pio_prepare_pop;
1053 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
1054 goto usbhsf_pio_prepare_pop;
1056 ret = usbhsf_fifo_select(pipe, fifo, 0);
1058 goto usbhsf_pio_prepare_pop;
1060 /* use PIO if packet is less than pio_dma_border */
1061 len = usbhsf_fifo_rcv_len(priv, fifo);
1062 len = min(pkt->length - pkt->actual, len);
1063 if (len & 0x7) /* 8byte alignment */
1064 goto usbhsf_pio_prepare_pop_unselect;
1066 if (len < usbhs_get_dparam(priv, pio_dma_border))
1067 goto usbhsf_pio_prepare_pop_unselect;
1069 ret = usbhsf_fifo_barrier(priv, fifo);
1071 goto usbhsf_pio_prepare_pop_unselect;
1073 if (usbhsf_dma_map(pkt) < 0)
1074 goto usbhsf_pio_prepare_pop_unselect;
1079 * usbhs_fifo_dma_pop_handler :: prepare
1080 * enabled irq to come here.
1081 * but it is no longer needed for DMA. disable it.
1083 usbhsf_rx_irq_ctrl(pipe, 0);
1087 INIT_WORK(&pkt->work, xfer_work);
1088 schedule_work(&pkt->work);
1092 usbhsf_pio_prepare_pop_unselect:
1093 usbhsf_fifo_unselect(pipe, fifo);
1094 usbhsf_pio_prepare_pop:
1097 * change handler to PIO
1099 pkt->handler = &usbhs_fifo_pio_pop_handler;
1101 return pkt->handler->try_run(pkt, is_done);
1104 static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
1106 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1108 BUG_ON(usbhs_get_dparam(priv, has_usb_dmac));
1110 return usbhsf_dma_try_pop_with_rx_irq(pkt, is_done);
1113 static int usbhsf_dma_pop_done_with_rx_irq(struct usbhs_pkt *pkt, int *is_done)
1115 struct usbhs_pipe *pipe = pkt->pipe;
1116 int maxp = usbhs_pipe_get_maxpacket(pipe);
1118 usbhsf_dma_stop(pipe, pipe->fifo);
1119 usbhsf_dma_unmap(pkt);
1120 usbhsf_fifo_unselect(pipe, pipe->fifo);
1122 pkt->actual += pkt->trans;
1124 if ((pkt->actual == pkt->length) || /* receive all data */
1125 (pkt->trans < maxp)) { /* short packet */
1127 usbhs_pipe_running(pipe, 0);
1130 usbhs_pipe_running(pipe, 0);
1131 usbhsf_prepare_pop(pkt, is_done);
1137 static size_t usbhs_dma_calc_received_size(struct usbhs_pkt *pkt,
1138 struct dma_chan *chan, int dtln)
1140 struct usbhs_pipe *pipe = pkt->pipe;
1141 struct dma_tx_state state;
1142 size_t received_size;
1143 int maxp = usbhs_pipe_get_maxpacket(pipe);
1145 dmaengine_tx_status(chan, pkt->cookie, &state);
1146 received_size = pkt->length - state.residue;
1149 received_size -= USBHS_USB_DMAC_XFER_SIZE;
1150 received_size &= ~(maxp - 1);
1151 received_size += dtln;
1154 return received_size;
1157 static int usbhsf_dma_pop_done_with_usb_dmac(struct usbhs_pkt *pkt,
1160 struct usbhs_pipe *pipe = pkt->pipe;
1161 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1162 struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
1163 struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
1167 * Since the driver disables rx_irq in DMA mode, the interrupt handler
1168 * cannot the BRDYSTS. So, the function clears it here because the
1169 * driver may use PIO mode next time.
1171 usbhs_xxxsts_clear(priv, BRDYSTS, usbhs_pipe_number(pipe));
1173 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
1174 usbhsf_fifo_clear(pipe, fifo);
1175 pkt->actual = usbhs_dma_calc_received_size(pkt, chan, rcv_len);
1177 usbhsf_dma_stop(pipe, fifo);
1178 usbhsf_dma_unmap(pkt);
1179 usbhsf_fifo_unselect(pipe, pipe->fifo);
1181 /* The driver can assume the rx transaction is always "done" */
1187 static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
1189 struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1191 if (usbhs_get_dparam(priv, has_usb_dmac))
1192 return usbhsf_dma_pop_done_with_usb_dmac(pkt, is_done);
1194 return usbhsf_dma_pop_done_with_rx_irq(pkt, is_done);
1197 struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
1198 .prepare = usbhsf_dma_prepare_pop,
1199 .try_run = usbhsf_dma_try_pop,
1200 .dma_done = usbhsf_dma_pop_done
1206 static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
1208 struct sh_dmae_slave *slave = param;
1213 * usbhs doesn't recognize id = 0 as valid DMA
1215 if (0 == slave->shdma_slave.slave_id)
1218 chan->private = slave;
1223 static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1226 dma_release_channel(fifo->tx_chan);
1228 dma_release_channel(fifo->rx_chan);
1230 fifo->tx_chan = NULL;
1231 fifo->rx_chan = NULL;
1234 static void usbhsf_dma_init_pdev(struct usbhs_fifo *fifo)
1236 dma_cap_mask_t mask;
1239 dma_cap_set(DMA_SLAVE, mask);
1240 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1244 dma_cap_set(DMA_SLAVE, mask);
1245 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1249 static void usbhsf_dma_init_dt(struct device *dev, struct usbhs_fifo *fifo,
1255 * To avoid complex handing for DnFIFOs, the driver uses each
1256 * DnFIFO as TX or RX direction (not bi-direction).
1257 * So, the driver uses odd channels for TX, even channels for RX.
1259 snprintf(name, sizeof(name), "ch%d", channel);
1261 fifo->tx_chan = dma_request_slave_channel_reason(dev, name);
1262 if (IS_ERR(fifo->tx_chan))
1263 fifo->tx_chan = NULL;
1265 fifo->rx_chan = dma_request_slave_channel_reason(dev, name);
1266 if (IS_ERR(fifo->rx_chan))
1267 fifo->rx_chan = NULL;
1271 static void usbhsf_dma_init(struct usbhs_priv *priv, struct usbhs_fifo *fifo,
1274 struct device *dev = usbhs_priv_to_dev(priv);
1277 usbhsf_dma_init_dt(dev, fifo, channel);
1279 usbhsf_dma_init_pdev(fifo);
1281 if (fifo->tx_chan || fifo->rx_chan)
1282 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
1284 fifo->tx_chan ? "[TX]" : " ",
1285 fifo->rx_chan ? "[RX]" : " ");
1291 static int usbhsf_irq_empty(struct usbhs_priv *priv,
1292 struct usbhs_irq_state *irq_state)
1294 struct usbhs_pipe *pipe;
1295 struct device *dev = usbhs_priv_to_dev(priv);
1298 if (!irq_state->bempsts) {
1299 dev_err(dev, "debug %s !!\n", __func__);
1303 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1306 * search interrupted "pipe"
1309 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1310 if (!(irq_state->bempsts & (1 << i)))
1313 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1315 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1321 static int usbhsf_irq_ready(struct usbhs_priv *priv,
1322 struct usbhs_irq_state *irq_state)
1324 struct usbhs_pipe *pipe;
1325 struct device *dev = usbhs_priv_to_dev(priv);
1328 if (!irq_state->brdysts) {
1329 dev_err(dev, "debug %s !!\n", __func__);
1333 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1336 * search interrupted "pipe"
1339 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1340 if (!(irq_state->brdysts & (1 << i)))
1343 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1345 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1351 static void usbhsf_dma_complete(void *arg)
1353 struct usbhs_pipe *pipe = arg;
1354 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1355 struct device *dev = usbhs_priv_to_dev(priv);
1358 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
1360 dev_err(dev, "dma_complete run_error %d : %d\n",
1361 usbhs_pipe_number(pipe), ret);
1364 void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe)
1366 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1367 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
1369 /* clear DCP FIFO of transmission */
1370 if (usbhsf_fifo_select(pipe, fifo, 1) < 0)
1372 usbhsf_fifo_clear(pipe, fifo);
1373 usbhsf_fifo_unselect(pipe, fifo);
1375 /* clear DCP FIFO of reception */
1376 if (usbhsf_fifo_select(pipe, fifo, 0) < 0)
1378 usbhsf_fifo_clear(pipe, fifo);
1379 usbhsf_fifo_unselect(pipe, fifo);
1385 void usbhs_fifo_init(struct usbhs_priv *priv)
1387 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1388 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
1389 struct usbhs_fifo *dfifo;
1392 mod->irq_empty = usbhsf_irq_empty;
1393 mod->irq_ready = usbhsf_irq_ready;
1394 mod->irq_bempsts = 0;
1395 mod->irq_brdysts = 0;
1398 usbhs_for_each_dfifo(priv, dfifo, i)
1402 void usbhs_fifo_quit(struct usbhs_priv *priv)
1404 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1406 mod->irq_empty = NULL;
1407 mod->irq_ready = NULL;
1408 mod->irq_bempsts = 0;
1409 mod->irq_brdysts = 0;
1412 #define __USBHS_DFIFO_INIT(priv, fifo, channel, fifo_port) \
1414 fifo = usbhsf_get_dnfifo(priv, channel); \
1415 fifo->name = "D"#channel"FIFO"; \
1416 fifo->port = fifo_port; \
1417 fifo->sel = D##channel##FIFOSEL; \
1418 fifo->ctr = D##channel##FIFOCTR; \
1419 fifo->tx_slave.shdma_slave.slave_id = \
1420 usbhs_get_dparam(priv, d##channel##_tx_id); \
1421 fifo->rx_slave.shdma_slave.slave_id = \
1422 usbhs_get_dparam(priv, d##channel##_rx_id); \
1423 usbhsf_dma_init(priv, fifo, channel); \
1426 #define USBHS_DFIFO_INIT(priv, fifo, channel) \
1427 __USBHS_DFIFO_INIT(priv, fifo, channel, D##channel##FIFO)
1428 #define USBHS_DFIFO_INIT_NO_PORT(priv, fifo, channel) \
1429 __USBHS_DFIFO_INIT(priv, fifo, channel, 0)
1431 int usbhs_fifo_probe(struct usbhs_priv *priv)
1433 struct usbhs_fifo *fifo;
1436 fifo = usbhsf_get_cfifo(priv);
1437 fifo->name = "CFIFO";
1439 fifo->sel = CFIFOSEL;
1440 fifo->ctr = CFIFOCTR;
1443 USBHS_DFIFO_INIT(priv, fifo, 0);
1444 USBHS_DFIFO_INIT(priv, fifo, 1);
1445 USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 2);
1446 USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 3);
1451 void usbhs_fifo_remove(struct usbhs_priv *priv)
1453 struct usbhs_fifo *fifo;
1456 usbhs_for_each_dfifo(priv, fifo, i)
1457 usbhsf_dma_quit(priv, fifo);