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))
27 #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
32 void usbhs_pkt_init(struct usbhs_pkt *pkt)
34 pkt->dma = DMA_ADDR_INVALID;
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)
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_del_init(&pkt->node);
79 list_add_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;
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_entry(pipe->list.next, 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 hander\n");
166 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 usbhs_write(priv, fifo->sel, base | MBW_32);
310 /* check ISEL and CURPIPE value */
312 if (base == (mask & usbhs_read(priv, fifo->sel))) {
313 usbhs_pipe_select_fifo(pipe, fifo);
319 dev_err(dev, "fifo select error\n");
327 static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
329 struct usbhs_pipe *pipe = pkt->pipe;
330 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
331 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
332 struct device *dev = usbhs_priv_to_dev(priv);
335 usbhs_pipe_disable(pipe);
337 ret = usbhsf_fifo_select(pipe, fifo, 1);
339 dev_err(dev, "%s() faile\n", __func__);
343 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
345 usbhsf_fifo_clear(pipe, fifo);
346 usbhsf_send_terminator(pipe, fifo);
348 usbhsf_fifo_unselect(pipe, fifo);
350 usbhsf_tx_irq_ctrl(pipe, 1);
351 usbhs_pipe_enable(pipe);
356 static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done)
358 struct usbhs_pipe *pipe = pkt->pipe;
359 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
360 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
361 struct device *dev = usbhs_priv_to_dev(priv);
364 usbhs_pipe_disable(pipe);
366 ret = usbhsf_fifo_select(pipe, fifo, 0);
368 dev_err(dev, "%s() fail\n", __func__);
372 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
373 usbhsf_fifo_clear(pipe, fifo);
375 usbhsf_fifo_unselect(pipe, fifo);
377 usbhsf_rx_irq_ctrl(pipe, 1);
378 usbhs_pipe_enable(pipe);
384 static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done)
386 struct usbhs_pipe *pipe = pkt->pipe;
388 if (pkt->handler == &usbhs_dcp_status_stage_in_handler)
389 usbhsf_tx_irq_ctrl(pipe, 0);
391 usbhsf_rx_irq_ctrl(pipe, 0);
393 pkt->actual = pkt->length;
399 struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = {
400 .prepare = usbhs_dcp_dir_switch_to_write,
401 .try_run = usbhs_dcp_dir_switch_done,
404 struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = {
405 .prepare = usbhs_dcp_dir_switch_to_read,
406 .try_run = usbhs_dcp_dir_switch_done,
410 * DCP data stage (push)
412 static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done)
414 struct usbhs_pipe *pipe = pkt->pipe;
416 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
419 * change handler to PIO push
421 pkt->handler = &usbhs_fifo_pio_push_handler;
423 return pkt->handler->prepare(pkt, is_done);
426 struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = {
427 .prepare = usbhsf_dcp_data_stage_try_push,
431 * DCP data stage (pop)
433 static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt,
436 struct usbhs_pipe *pipe = pkt->pipe;
437 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
438 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
440 if (usbhs_pipe_is_busy(pipe))
444 * prepare pop for DCP should
445 * - change DCP direction,
449 usbhs_pipe_disable(pipe);
451 usbhs_pipe_sequence_data1(pipe); /* DATA1 */
453 usbhsf_fifo_select(pipe, fifo, 0);
454 usbhsf_fifo_clear(pipe, fifo);
455 usbhsf_fifo_unselect(pipe, fifo);
458 * change handler to PIO pop
460 pkt->handler = &usbhs_fifo_pio_pop_handler;
462 return pkt->handler->prepare(pkt, is_done);
465 struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = {
466 .prepare = usbhsf_dcp_data_stage_prepare_pop,
472 static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
474 struct usbhs_pipe *pipe = pkt->pipe;
475 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
476 struct device *dev = usbhs_priv_to_dev(priv);
477 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
478 void __iomem *addr = priv->base + fifo->port;
480 int maxp = usbhs_pipe_get_maxpacket(pipe);
485 ret = usbhsf_fifo_select(pipe, fifo, 1);
489 ret = usbhs_pipe_is_accessible(pipe);
491 /* inaccessible pipe is not an error */
493 goto usbhs_fifo_write_busy;
496 ret = usbhsf_fifo_barrier(priv, fifo);
498 goto usbhs_fifo_write_busy;
500 buf = pkt->buf + pkt->actual;
501 len = pkt->length - pkt->actual;
502 len = min(len, maxp);
504 is_short = total_len < maxp;
511 if (len >= 4 && !((unsigned long)buf & 0x03)) {
512 iowrite32_rep(addr, buf, len / 4);
514 buf += total_len - len;
517 /* the rest operation */
518 for (i = 0; i < len; i++)
519 iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
524 pkt->actual += total_len;
526 if (pkt->actual < pkt->length)
527 *is_done = 0; /* there are remainder data */
529 *is_done = 1; /* short packet */
531 *is_done = !pkt->zero; /* send zero packet ? */
537 usbhsf_send_terminator(pipe, fifo);
539 usbhsf_tx_irq_ctrl(pipe, !*is_done);
540 usbhs_pipe_enable(pipe);
542 dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
543 usbhs_pipe_number(pipe),
544 pkt->length, pkt->actual, *is_done, pkt->zero);
550 if (usbhs_pipe_is_dcp(pipe))
551 usbhs_dcp_control_transfer_done(pipe);
554 usbhsf_fifo_unselect(pipe, fifo);
558 usbhs_fifo_write_busy:
559 usbhsf_fifo_unselect(pipe, fifo);
565 usbhsf_tx_irq_ctrl(pipe, 1);
570 struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
571 .prepare = usbhsf_pio_try_push,
572 .try_run = usbhsf_pio_try_push,
578 static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
580 struct usbhs_pipe *pipe = pkt->pipe;
582 if (usbhs_pipe_is_busy(pipe))
586 * pipe enable to prepare packet receive
589 usbhs_pipe_enable(pipe);
590 usbhsf_rx_irq_ctrl(pipe, 1);
595 static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
597 struct usbhs_pipe *pipe = pkt->pipe;
598 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
599 struct device *dev = usbhs_priv_to_dev(priv);
600 struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
601 void __iomem *addr = priv->base + fifo->port;
604 int maxp = usbhs_pipe_get_maxpacket(pipe);
609 ret = usbhsf_fifo_select(pipe, fifo, 0);
613 ret = usbhsf_fifo_barrier(priv, fifo);
615 goto usbhs_fifo_read_busy;
617 rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
619 buf = pkt->buf + pkt->actual;
620 len = pkt->length - pkt->actual;
621 len = min(len, rcv_len);
625 * update actual length first here to decide disable pipe.
626 * if this pipe keeps BUF status and all data were popped,
627 * then, next interrupt/token will be issued again
629 pkt->actual += total_len;
631 if ((pkt->actual == pkt->length) || /* receive all data */
632 (total_len < maxp)) { /* short packet */
634 usbhsf_rx_irq_ctrl(pipe, 0);
635 usbhs_pipe_disable(pipe); /* disable pipe first */
639 * Buffer clear if Zero-Length packet
642 * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
645 usbhsf_fifo_clear(pipe, fifo);
646 goto usbhs_fifo_read_end;
654 if (len >= 4 && !((unsigned long)buf & 0x03)) {
655 ioread32_rep(addr, buf, len / 4);
657 buf += total_len - len;
660 /* the rest operation */
661 for (i = 0; i < len; i++) {
663 data = ioread32(addr);
665 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
669 dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
670 usbhs_pipe_number(pipe),
671 pkt->length, pkt->actual, *is_done, pkt->zero);
673 usbhs_fifo_read_busy:
674 usbhsf_fifo_unselect(pipe, fifo);
679 struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
680 .prepare = usbhsf_prepare_pop,
681 .try_run = usbhsf_pio_try_pop,
685 * DCP ctrol statge handler
687 static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
689 usbhs_dcp_control_transfer_done(pkt->pipe);
696 struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
697 .prepare = usbhsf_ctrl_stage_end,
698 .try_run = usbhsf_ctrl_stage_end,
704 static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
705 struct usbhs_pkt *pkt)
707 if (&usbhs_fifo_dma_push_handler == pkt->handler)
708 return fifo->tx_chan;
710 if (&usbhs_fifo_dma_pop_handler == pkt->handler)
711 return fifo->rx_chan;
716 static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
717 struct usbhs_pkt *pkt)
719 struct usbhs_fifo *fifo;
722 fifo = usbhsf_get_d0fifo(priv);
723 if (usbhsf_dma_chan_get(fifo, pkt) &&
724 !usbhsf_fifo_is_busy(fifo))
728 fifo = usbhsf_get_d1fifo(priv);
729 if (usbhsf_dma_chan_get(fifo, pkt) &&
730 !usbhsf_fifo_is_busy(fifo))
736 #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
737 #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
738 static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
739 struct usbhs_fifo *fifo,
742 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
744 usbhs_bset(priv, fifo->sel, DREQE, dreqe);
747 #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
748 #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
749 static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
751 struct usbhs_pipe *pipe = pkt->pipe;
752 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
753 struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
755 return info->dma_map_ctrl(pkt, map);
758 static void usbhsf_dma_complete(void *arg);
759 static void usbhsf_dma_prepare_tasklet(unsigned long data)
761 struct usbhs_pkt *pkt = (struct usbhs_pkt *)data;
762 struct usbhs_pipe *pipe = pkt->pipe;
763 struct usbhs_fifo *fifo;
764 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
765 struct scatterlist sg;
766 struct dma_async_tx_descriptor *desc;
767 struct dma_chan *chan;
768 struct device *dev = usbhs_priv_to_dev(priv);
769 enum dma_data_direction dir;
773 usbhs_lock(priv, flags);
774 fifo = usbhs_pipe_to_fifo(pipe);
778 chan = usbhsf_dma_chan_get(fifo, pkt);
779 dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
781 sg_init_table(&sg, 1);
782 sg_set_page(&sg, virt_to_page(pkt->dma),
783 pkt->length, offset_in_page(pkt->dma));
784 sg_dma_address(&sg) = pkt->dma + pkt->actual;
785 sg_dma_len(&sg) = pkt->trans;
787 desc = chan->device->device_prep_slave_sg(chan, &sg, 1, dir,
793 desc->callback = usbhsf_dma_complete;
794 desc->callback_param = pipe;
796 cookie = desc->tx_submit(desc);
798 dev_err(dev, "Failed to submit dma descriptor\n");
802 dev_dbg(dev, " %s %d (%d/ %d)\n",
803 fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
805 usbhsf_dma_start(pipe, fifo);
806 dma_async_issue_pending(chan);
809 usbhs_unlock(priv, flags);
815 static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
817 struct usbhs_pipe *pipe = pkt->pipe;
818 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
819 struct usbhs_fifo *fifo;
820 int len = pkt->length - pkt->actual;
823 if (usbhs_pipe_is_busy(pipe))
826 /* use PIO if packet is less than pio_dma_border or pipe is DCP */
827 if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
828 usbhs_pipe_is_dcp(pipe))
829 goto usbhsf_pio_prepare_push;
831 if (len % 4) /* 32bit alignment */
832 goto usbhsf_pio_prepare_push;
834 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
835 goto usbhsf_pio_prepare_push;
837 /* get enable DMA fifo */
838 fifo = usbhsf_get_dma_fifo(priv, pkt);
840 goto usbhsf_pio_prepare_push;
842 if (usbhsf_dma_map(pkt) < 0)
843 goto usbhsf_pio_prepare_push;
845 ret = usbhsf_fifo_select(pipe, fifo, 0);
847 goto usbhsf_pio_prepare_push_unmap;
851 tasklet_init(&fifo->tasklet,
852 usbhsf_dma_prepare_tasklet,
855 tasklet_schedule(&fifo->tasklet);
859 usbhsf_pio_prepare_push_unmap:
860 usbhsf_dma_unmap(pkt);
861 usbhsf_pio_prepare_push:
863 * change handler to PIO
865 pkt->handler = &usbhs_fifo_pio_push_handler;
867 return pkt->handler->prepare(pkt, is_done);
870 static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
872 struct usbhs_pipe *pipe = pkt->pipe;
874 pkt->actual = pkt->trans;
876 *is_done = !pkt->zero; /* send zero packet ? */
878 usbhsf_dma_stop(pipe, pipe->fifo);
879 usbhsf_dma_unmap(pkt);
880 usbhsf_fifo_unselect(pipe, pipe->fifo);
885 struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
886 .prepare = usbhsf_dma_prepare_push,
887 .dma_done = usbhsf_dma_push_done,
893 static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
895 struct usbhs_pipe *pipe = pkt->pipe;
896 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
897 struct usbhs_fifo *fifo;
900 if (usbhs_pipe_is_busy(pipe))
903 if (usbhs_pipe_is_dcp(pipe))
904 goto usbhsf_pio_prepare_pop;
906 /* get enable DMA fifo */
907 fifo = usbhsf_get_dma_fifo(priv, pkt);
909 goto usbhsf_pio_prepare_pop;
911 if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
912 goto usbhsf_pio_prepare_pop;
914 ret = usbhsf_fifo_select(pipe, fifo, 0);
916 goto usbhsf_pio_prepare_pop;
918 /* use PIO if packet is less than pio_dma_border */
919 len = usbhsf_fifo_rcv_len(priv, fifo);
920 len = min(pkt->length - pkt->actual, len);
921 if (len % 4) /* 32bit alignment */
922 goto usbhsf_pio_prepare_pop_unselect;
924 if (len < usbhs_get_dparam(priv, pio_dma_border))
925 goto usbhsf_pio_prepare_pop_unselect;
927 ret = usbhsf_fifo_barrier(priv, fifo);
929 goto usbhsf_pio_prepare_pop_unselect;
931 if (usbhsf_dma_map(pkt) < 0)
932 goto usbhsf_pio_prepare_pop_unselect;
937 * usbhs_fifo_dma_pop_handler :: prepare
938 * enabled irq to come here.
939 * but it is no longer needed for DMA. disable it.
941 usbhsf_rx_irq_ctrl(pipe, 0);
945 usbhsf_tx_irq_ctrl(pipe, 0);
946 tasklet_init(&fifo->tasklet,
947 usbhsf_dma_prepare_tasklet,
950 tasklet_schedule(&fifo->tasklet);
954 usbhsf_pio_prepare_pop_unselect:
955 usbhsf_fifo_unselect(pipe, fifo);
956 usbhsf_pio_prepare_pop:
959 * change handler to PIO
961 pkt->handler = &usbhs_fifo_pio_pop_handler;
963 return pkt->handler->try_run(pkt, is_done);
966 static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
968 struct usbhs_pipe *pipe = pkt->pipe;
969 int maxp = usbhs_pipe_get_maxpacket(pipe);
971 usbhsf_dma_stop(pipe, pipe->fifo);
972 usbhsf_dma_unmap(pkt);
973 usbhsf_fifo_unselect(pipe, pipe->fifo);
975 pkt->actual += pkt->trans;
977 if ((pkt->actual == pkt->length) || /* receive all data */
978 (pkt->trans < maxp)) { /* short packet */
982 usbhsf_prepare_pop(pkt, is_done);
988 struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
989 .prepare = usbhsf_prepare_pop,
990 .try_run = usbhsf_dma_try_pop,
991 .dma_done = usbhsf_dma_pop_done
997 static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
999 struct sh_dmae_slave *slave = param;
1004 * usbhs doesn't recognize id = 0 as valid DMA
1006 if (0 == slave->slave_id)
1009 chan->private = slave;
1014 static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1017 dma_release_channel(fifo->tx_chan);
1019 dma_release_channel(fifo->rx_chan);
1021 fifo->tx_chan = NULL;
1022 fifo->rx_chan = NULL;
1025 static void usbhsf_dma_init(struct usbhs_priv *priv,
1026 struct usbhs_fifo *fifo)
1028 struct device *dev = usbhs_priv_to_dev(priv);
1029 dma_cap_mask_t mask;
1032 dma_cap_set(DMA_SLAVE, mask);
1033 fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1037 dma_cap_set(DMA_SLAVE, mask);
1038 fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1041 if (fifo->tx_chan || fifo->rx_chan)
1042 dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
1044 fifo->tx_chan ? "[TX]" : " ",
1045 fifo->rx_chan ? "[RX]" : " ");
1051 static int usbhsf_irq_empty(struct usbhs_priv *priv,
1052 struct usbhs_irq_state *irq_state)
1054 struct usbhs_pipe *pipe;
1055 struct device *dev = usbhs_priv_to_dev(priv);
1058 if (!irq_state->bempsts) {
1059 dev_err(dev, "debug %s !!\n", __func__);
1063 dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1066 * search interrupted "pipe"
1069 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1070 if (!(irq_state->bempsts & (1 << i)))
1073 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1075 dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1081 static int usbhsf_irq_ready(struct usbhs_priv *priv,
1082 struct usbhs_irq_state *irq_state)
1084 struct usbhs_pipe *pipe;
1085 struct device *dev = usbhs_priv_to_dev(priv);
1088 if (!irq_state->brdysts) {
1089 dev_err(dev, "debug %s !!\n", __func__);
1093 dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1096 * search interrupted "pipe"
1099 usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1100 if (!(irq_state->brdysts & (1 << i)))
1103 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1105 dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1111 static void usbhsf_dma_complete(void *arg)
1113 struct usbhs_pipe *pipe = arg;
1114 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1115 struct device *dev = usbhs_priv_to_dev(priv);
1118 ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
1120 dev_err(dev, "dma_complete run_error %d : %d\n",
1121 usbhs_pipe_number(pipe), ret);
1127 void usbhs_fifo_init(struct usbhs_priv *priv)
1129 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1130 struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
1131 struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv);
1132 struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv);
1134 mod->irq_empty = usbhsf_irq_empty;
1135 mod->irq_ready = usbhsf_irq_ready;
1136 mod->irq_bempsts = 0;
1137 mod->irq_brdysts = 0;
1140 cfifo->tx_chan = NULL;
1141 cfifo->rx_chan = NULL;
1143 d0fifo->pipe = NULL;
1144 d0fifo->tx_chan = NULL;
1145 d0fifo->rx_chan = NULL;
1147 d1fifo->pipe = NULL;
1148 d1fifo->tx_chan = NULL;
1149 d1fifo->rx_chan = NULL;
1151 usbhsf_dma_init(priv, usbhsf_get_d0fifo(priv));
1152 usbhsf_dma_init(priv, usbhsf_get_d1fifo(priv));
1155 void usbhs_fifo_quit(struct usbhs_priv *priv)
1157 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1159 mod->irq_empty = NULL;
1160 mod->irq_ready = NULL;
1161 mod->irq_bempsts = 0;
1162 mod->irq_brdysts = 0;
1164 usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv));
1165 usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv));
1168 int usbhs_fifo_probe(struct usbhs_priv *priv)
1170 struct usbhs_fifo *fifo;
1173 fifo = usbhsf_get_cfifo(priv);
1174 fifo->name = "CFIFO";
1176 fifo->sel = CFIFOSEL;
1177 fifo->ctr = CFIFOCTR;
1180 fifo = usbhsf_get_d0fifo(priv);
1181 fifo->name = "D0FIFO";
1182 fifo->port = D0FIFO;
1183 fifo->sel = D0FIFOSEL;
1184 fifo->ctr = D0FIFOCTR;
1185 fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id);
1186 fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id);
1189 fifo = usbhsf_get_d1fifo(priv);
1190 fifo->name = "D1FIFO";
1191 fifo->port = D1FIFO;
1192 fifo->sel = D1FIFOSEL;
1193 fifo->ctr = D1FIFOCTR;
1194 fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id);
1195 fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id);
1200 void usbhs_fifo_remove(struct usbhs_priv *priv)