15fd54aceSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-1.0+
2e8d548d5SKuninori Morimoto /*
3e8d548d5SKuninori Morimoto * Renesas USB driver
4e8d548d5SKuninori Morimoto *
5e8d548d5SKuninori Morimoto * Copyright (C) 2011 Renesas Solutions Corp.
631e795c6SYoshihiro Shimoda * Copyright (C) 2019 Renesas Electronics Corporation
7e8d548d5SKuninori Morimoto * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
8e8d548d5SKuninori Morimoto */
9e8d548d5SKuninori Morimoto #include <linux/delay.h>
10e8d548d5SKuninori Morimoto #include <linux/io.h>
119c646cfcSRafael J. Wysocki #include <linux/scatterlist.h>
12cc502bb7SPaul Bolle #include "common.h"
13cc502bb7SPaul Bolle #include "pipe.h"
14e8d548d5SKuninori Morimoto
15d3af90a5SKuninori Morimoto #define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo))
16d3af90a5SKuninori Morimoto
17d77e3f4eSKuninori Morimoto #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
18d77e3f4eSKuninori Morimoto
19e8d548d5SKuninori Morimoto /*
20233f519dSKuninori Morimoto * packet initialize
21233f519dSKuninori Morimoto */
usbhs_pkt_init(struct usbhs_pkt * pkt)22233f519dSKuninori Morimoto void usbhs_pkt_init(struct usbhs_pkt *pkt)
23233f519dSKuninori Morimoto {
24233f519dSKuninori Morimoto INIT_LIST_HEAD(&pkt->node);
25233f519dSKuninori Morimoto }
26233f519dSKuninori Morimoto
27233f519dSKuninori Morimoto /*
28233f519dSKuninori Morimoto * packet control function
294bd04811SKuninori Morimoto */
usbhsf_null_handle(struct usbhs_pkt * pkt,int * is_done)3097664a20SKuninori Morimoto static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done)
31dad67397SKuninori Morimoto {
32dad67397SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
33dad67397SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
34dad67397SKuninori Morimoto
35dad67397SKuninori Morimoto dev_err(dev, "null handler\n");
36dad67397SKuninori Morimoto
37dad67397SKuninori Morimoto return -EINVAL;
38dad67397SKuninori Morimoto }
39dad67397SKuninori Morimoto
40fcb42e23SJulia Lawall static const struct usbhs_pkt_handle usbhsf_null_handler = {
41dad67397SKuninori Morimoto .prepare = usbhsf_null_handle,
42dad67397SKuninori Morimoto .try_run = usbhsf_null_handle,
43dad67397SKuninori Morimoto };
44dad67397SKuninori Morimoto
usbhs_pkt_push(struct usbhs_pipe * pipe,struct usbhs_pkt * pkt,void (* done)(struct usbhs_priv * priv,struct usbhs_pkt * pkt),void * buf,int len,int zero,int sequence)45659d4954SKuninori Morimoto void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
46b331872bSKuninori Morimoto void (*done)(struct usbhs_priv *priv,
47b331872bSKuninori Morimoto struct usbhs_pkt *pkt),
483edeee38SKuninori Morimoto void *buf, int len, int zero, int sequence)
496acb95d4SKuninori Morimoto {
50dad67397SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
51dad67397SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
5297664a20SKuninori Morimoto unsigned long flags;
5397664a20SKuninori Morimoto
54b331872bSKuninori Morimoto if (!done) {
55b331872bSKuninori Morimoto dev_err(dev, "no done function\n");
56b331872bSKuninori Morimoto return;
57b331872bSKuninori Morimoto }
58b331872bSKuninori Morimoto
59a2c76b83SKuninori Morimoto /******************** spin lock ********************/
60a2c76b83SKuninori Morimoto usbhs_lock(priv, flags);
61a2c76b83SKuninori Morimoto
620c6ef985SKuninori Morimoto if (!pipe->handler) {
63dad67397SKuninori Morimoto dev_err(dev, "no handler function\n");
640c6ef985SKuninori Morimoto pipe->handler = &usbhsf_null_handler;
65dad67397SKuninori Morimoto }
66dad67397SKuninori Morimoto
67d5261286SGuennadi Liakhovetski list_move_tail(&pkt->node, &pipe->list);
686acb95d4SKuninori Morimoto
690c6ef985SKuninori Morimoto /*
700c6ef985SKuninori Morimoto * each pkt must hold own handler.
710c6ef985SKuninori Morimoto * because handler might be changed by its situation.
720c6ef985SKuninori Morimoto * dma handler -> pio handler.
730c6ef985SKuninori Morimoto */
746acb95d4SKuninori Morimoto pkt->pipe = pipe;
75659d4954SKuninori Morimoto pkt->buf = buf;
760c6ef985SKuninori Morimoto pkt->handler = pipe->handler;
77659d4954SKuninori Morimoto pkt->length = len;
78659d4954SKuninori Morimoto pkt->zero = zero;
79659d4954SKuninori Morimoto pkt->actual = 0;
80b331872bSKuninori Morimoto pkt->done = done;
813edeee38SKuninori Morimoto pkt->sequence = sequence;
8297664a20SKuninori Morimoto
8397664a20SKuninori Morimoto usbhs_unlock(priv, flags);
8497664a20SKuninori Morimoto /******************** spin unlock ******************/
856acb95d4SKuninori Morimoto }
866acb95d4SKuninori Morimoto
__usbhsf_pkt_del(struct usbhs_pkt * pkt)8797664a20SKuninori Morimoto static void __usbhsf_pkt_del(struct usbhs_pkt *pkt)
886acb95d4SKuninori Morimoto {
896acb95d4SKuninori Morimoto list_del_init(&pkt->node);
906acb95d4SKuninori Morimoto }
916acb95d4SKuninori Morimoto
__usbhsf_pkt_get(struct usbhs_pipe * pipe)924d599cd3SYoshihiro Shimoda struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe)
936acb95d4SKuninori Morimoto {
9431faf878SMasahiro Yamada return list_first_entry_or_null(&pipe->list, struct usbhs_pkt, node);
956acb95d4SKuninori Morimoto }
966acb95d4SKuninori Morimoto
972743e7f9SYoshihiro Shimoda static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
982743e7f9SYoshihiro Shimoda struct usbhs_fifo *fifo);
992743e7f9SYoshihiro Shimoda static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
1002743e7f9SYoshihiro Shimoda struct usbhs_pkt *pkt);
1012743e7f9SYoshihiro Shimoda #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
1022743e7f9SYoshihiro Shimoda #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
1032743e7f9SYoshihiro Shimoda static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map);
1045719df24SYoshihiro Shimoda static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable);
1055719df24SYoshihiro Shimoda static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable);
usbhs_pkt_pop(struct usbhs_pipe * pipe,struct usbhs_pkt * pkt)10697664a20SKuninori Morimoto struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
10797664a20SKuninori Morimoto {
10897664a20SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1092743e7f9SYoshihiro Shimoda struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
11097664a20SKuninori Morimoto unsigned long flags;
11197664a20SKuninori Morimoto
11297664a20SKuninori Morimoto /******************** spin lock ********************/
11397664a20SKuninori Morimoto usbhs_lock(priv, flags);
11497664a20SKuninori Morimoto
1152743e7f9SYoshihiro Shimoda usbhs_pipe_disable(pipe);
1162743e7f9SYoshihiro Shimoda
11797664a20SKuninori Morimoto if (!pkt)
11897664a20SKuninori Morimoto pkt = __usbhsf_pkt_get(pipe);
11997664a20SKuninori Morimoto
1202743e7f9SYoshihiro Shimoda if (pkt) {
1212743e7f9SYoshihiro Shimoda struct dma_chan *chan = NULL;
1222743e7f9SYoshihiro Shimoda
1232743e7f9SYoshihiro Shimoda if (fifo)
1242743e7f9SYoshihiro Shimoda chan = usbhsf_dma_chan_get(fifo, pkt);
1252743e7f9SYoshihiro Shimoda if (chan) {
1262743e7f9SYoshihiro Shimoda dmaengine_terminate_all(chan);
1272743e7f9SYoshihiro Shimoda usbhsf_dma_unmap(pkt);
1285719df24SYoshihiro Shimoda } else {
1295719df24SYoshihiro Shimoda if (usbhs_pipe_is_dir_in(pipe))
1305719df24SYoshihiro Shimoda usbhsf_rx_irq_ctrl(pipe, 0);
1315719df24SYoshihiro Shimoda else
1325719df24SYoshihiro Shimoda usbhsf_tx_irq_ctrl(pipe, 0);
1332743e7f9SYoshihiro Shimoda }
1342743e7f9SYoshihiro Shimoda
1355785e87aSYoshihiro Shimoda usbhs_pipe_clear_without_sequence(pipe, 0, 0);
1369917f0e3SYoshihiro Shimoda usbhs_pipe_running(pipe, 0);
1375785e87aSYoshihiro Shimoda
13897664a20SKuninori Morimoto __usbhsf_pkt_del(pkt);
1392743e7f9SYoshihiro Shimoda }
1402743e7f9SYoshihiro Shimoda
1412743e7f9SYoshihiro Shimoda if (fifo)
1422743e7f9SYoshihiro Shimoda usbhsf_fifo_unselect(pipe, fifo);
14397664a20SKuninori Morimoto
14497664a20SKuninori Morimoto usbhs_unlock(priv, flags);
14597664a20SKuninori Morimoto /******************** spin unlock ******************/
14697664a20SKuninori Morimoto
14797664a20SKuninori Morimoto return pkt;
14897664a20SKuninori Morimoto }
14997664a20SKuninori Morimoto
15051b8a021SKuninori Morimoto enum {
15151b8a021SKuninori Morimoto USBHSF_PKT_PREPARE,
15251b8a021SKuninori Morimoto USBHSF_PKT_TRY_RUN,
15351b8a021SKuninori Morimoto USBHSF_PKT_DMA_DONE,
15451b8a021SKuninori Morimoto };
15551b8a021SKuninori Morimoto
usbhsf_pkt_handler(struct usbhs_pipe * pipe,int type)15651b8a021SKuninori Morimoto static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type)
15797664a20SKuninori Morimoto {
15897664a20SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
15997664a20SKuninori Morimoto struct usbhs_pkt *pkt;
16097664a20SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
16197664a20SKuninori Morimoto int (*func)(struct usbhs_pkt *pkt, int *is_done);
16297664a20SKuninori Morimoto unsigned long flags;
16397664a20SKuninori Morimoto int ret = 0;
16497664a20SKuninori Morimoto int is_done = 0;
16597664a20SKuninori Morimoto
16697664a20SKuninori Morimoto /******************** spin lock ********************/
16797664a20SKuninori Morimoto usbhs_lock(priv, flags);
16897664a20SKuninori Morimoto
16997664a20SKuninori Morimoto pkt = __usbhsf_pkt_get(pipe);
1703af32605SJia-Ju Bai if (!pkt) {
1713af32605SJia-Ju Bai ret = -EINVAL;
17297664a20SKuninori Morimoto goto __usbhs_pkt_handler_end;
1733af32605SJia-Ju Bai }
17497664a20SKuninori Morimoto
17597664a20SKuninori Morimoto switch (type) {
17697664a20SKuninori Morimoto case USBHSF_PKT_PREPARE:
17797664a20SKuninori Morimoto func = pkt->handler->prepare;
17897664a20SKuninori Morimoto break;
17997664a20SKuninori Morimoto case USBHSF_PKT_TRY_RUN:
18097664a20SKuninori Morimoto func = pkt->handler->try_run;
18197664a20SKuninori Morimoto break;
182e73a9891SKuninori Morimoto case USBHSF_PKT_DMA_DONE:
183e73a9891SKuninori Morimoto func = pkt->handler->dma_done;
184e73a9891SKuninori Morimoto break;
18597664a20SKuninori Morimoto default:
186984e833cSMasanari Iida dev_err(dev, "unknown pkt handler\n");
18797664a20SKuninori Morimoto goto __usbhs_pkt_handler_end;
18897664a20SKuninori Morimoto }
18997664a20SKuninori Morimoto
190894f2fc4SYoshihiro Shimoda if (likely(func))
19197664a20SKuninori Morimoto ret = func(pkt, &is_done);
19297664a20SKuninori Morimoto
19397664a20SKuninori Morimoto if (is_done)
19497664a20SKuninori Morimoto __usbhsf_pkt_del(pkt);
19597664a20SKuninori Morimoto
19697664a20SKuninori Morimoto __usbhs_pkt_handler_end:
19797664a20SKuninori Morimoto usbhs_unlock(priv, flags);
19897664a20SKuninori Morimoto /******************** spin unlock ******************/
19997664a20SKuninori Morimoto
2000432eed0SKuninori Morimoto if (is_done) {
201b331872bSKuninori Morimoto pkt->done(priv, pkt);
2020432eed0SKuninori Morimoto usbhs_pkt_start(pipe);
2030432eed0SKuninori Morimoto }
20497664a20SKuninori Morimoto
20597664a20SKuninori Morimoto return ret;
20697664a20SKuninori Morimoto }
20797664a20SKuninori Morimoto
usbhs_pkt_start(struct usbhs_pipe * pipe)20851b8a021SKuninori Morimoto void usbhs_pkt_start(struct usbhs_pipe *pipe)
20951b8a021SKuninori Morimoto {
21051b8a021SKuninori Morimoto usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE);
21151b8a021SKuninori Morimoto }
21251b8a021SKuninori Morimoto
2134bd04811SKuninori Morimoto /*
214659d4954SKuninori Morimoto * irq enable/disable function
215659d4954SKuninori Morimoto */
2163192fcb2SKuninori Morimoto #define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_bempsts, e)
2173192fcb2SKuninori Morimoto #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_brdysts, e)
218659d4954SKuninori Morimoto #define usbhsf_irq_callback_ctrl(pipe, status, enable) \
219659d4954SKuninori Morimoto ({ \
220659d4954SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \
221659d4954SKuninori Morimoto struct usbhs_mod *mod = usbhs_mod_get_current(priv); \
222659d4954SKuninori Morimoto u16 status = (1 << usbhs_pipe_number(pipe)); \
223659d4954SKuninori Morimoto if (!mod) \
224659d4954SKuninori Morimoto return; \
225659d4954SKuninori Morimoto if (enable) \
2263192fcb2SKuninori Morimoto mod->status |= status; \
227659d4954SKuninori Morimoto else \
2283192fcb2SKuninori Morimoto mod->status &= ~status; \
229659d4954SKuninori Morimoto usbhs_irq_callback_update(priv, mod); \
230659d4954SKuninori Morimoto })
231659d4954SKuninori Morimoto
usbhsf_tx_irq_ctrl(struct usbhs_pipe * pipe,int enable)232659d4954SKuninori Morimoto static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
233659d4954SKuninori Morimoto {
234659d4954SKuninori Morimoto /*
235659d4954SKuninori Morimoto * And DCP pipe can NOT use "ready interrupt" for "send"
236659d4954SKuninori Morimoto * it should use "empty" interrupt.
237659d4954SKuninori Morimoto * see
238659d4954SKuninori Morimoto * "Operation" - "Interrupt Function" - "BRDY Interrupt"
239659d4954SKuninori Morimoto *
240659d4954SKuninori Morimoto * on the other hand, normal pipe can use "ready interrupt" for "send"
241659d4954SKuninori Morimoto * even though it is single/double buffer
242659d4954SKuninori Morimoto */
243659d4954SKuninori Morimoto if (usbhs_pipe_is_dcp(pipe))
244659d4954SKuninori Morimoto usbhsf_irq_empty_ctrl(pipe, enable);
245659d4954SKuninori Morimoto else
246659d4954SKuninori Morimoto usbhsf_irq_ready_ctrl(pipe, enable);
247659d4954SKuninori Morimoto }
248659d4954SKuninori Morimoto
usbhsf_rx_irq_ctrl(struct usbhs_pipe * pipe,int enable)249659d4954SKuninori Morimoto static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable)
250659d4954SKuninori Morimoto {
251659d4954SKuninori Morimoto usbhsf_irq_ready_ctrl(pipe, enable);
252659d4954SKuninori Morimoto }
253659d4954SKuninori Morimoto
254659d4954SKuninori Morimoto /*
255e8d548d5SKuninori Morimoto * FIFO ctrl
256e8d548d5SKuninori Morimoto */
usbhsf_send_terminator(struct usbhs_pipe * pipe,struct usbhs_fifo * fifo)257d3af90a5SKuninori Morimoto static void usbhsf_send_terminator(struct usbhs_pipe *pipe,
258d3af90a5SKuninori Morimoto struct usbhs_fifo *fifo)
259e8d548d5SKuninori Morimoto {
260e8d548d5SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
261e8d548d5SKuninori Morimoto
262d3af90a5SKuninori Morimoto usbhs_bset(priv, fifo->ctr, BVAL, BVAL);
263e8d548d5SKuninori Morimoto }
264e8d548d5SKuninori Morimoto
usbhsf_fifo_barrier(struct usbhs_priv * priv,struct usbhs_fifo * fifo)265d3af90a5SKuninori Morimoto static int usbhsf_fifo_barrier(struct usbhs_priv *priv,
266d3af90a5SKuninori Morimoto struct usbhs_fifo *fifo)
267e8d548d5SKuninori Morimoto {
268e8d548d5SKuninori Morimoto /* The FIFO port is accessible */
269d3af90a5SKuninori Morimoto if (usbhs_read(priv, fifo->ctr) & FRDY)
270e8d548d5SKuninori Morimoto return 0;
271e8d548d5SKuninori Morimoto
272e8d548d5SKuninori Morimoto return -EBUSY;
273e8d548d5SKuninori Morimoto }
274e8d548d5SKuninori Morimoto
usbhsf_fifo_clear(struct usbhs_pipe * pipe,struct usbhs_fifo * fifo)275d3af90a5SKuninori Morimoto static void usbhsf_fifo_clear(struct usbhs_pipe *pipe,
276d3af90a5SKuninori Morimoto struct usbhs_fifo *fifo)
277e8d548d5SKuninori Morimoto {
278e8d548d5SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
2796124607aSYoshihiro Shimoda int ret = 0;
280e8d548d5SKuninori Morimoto
2810a2ce62bSYoshihiro Shimoda if (!usbhs_pipe_is_dcp(pipe)) {
2820a2ce62bSYoshihiro Shimoda /*
2830a2ce62bSYoshihiro Shimoda * This driver checks the pipe condition first to avoid -EBUSY
284469e2978SYoshihiro Shimoda * from usbhsf_fifo_barrier() if the pipe is RX direction and
285469e2978SYoshihiro Shimoda * empty.
2860a2ce62bSYoshihiro Shimoda */
2870a2ce62bSYoshihiro Shimoda if (usbhs_pipe_is_dir_in(pipe))
2880a2ce62bSYoshihiro Shimoda ret = usbhs_pipe_is_accessible(pipe);
2890a2ce62bSYoshihiro Shimoda if (!ret)
2906124607aSYoshihiro Shimoda ret = usbhsf_fifo_barrier(priv, fifo);
2910a2ce62bSYoshihiro Shimoda }
292e8d548d5SKuninori Morimoto
2936124607aSYoshihiro Shimoda /*
2946124607aSYoshihiro Shimoda * if non-DCP pipe, this driver should set BCLR when
2956124607aSYoshihiro Shimoda * usbhsf_fifo_barrier() returns 0.
2966124607aSYoshihiro Shimoda */
2976124607aSYoshihiro Shimoda if (!ret)
298d3af90a5SKuninori Morimoto usbhs_write(priv, fifo->ctr, BCLR);
299e8d548d5SKuninori Morimoto }
300e8d548d5SKuninori Morimoto
usbhsf_fifo_rcv_len(struct usbhs_priv * priv,struct usbhs_fifo * fifo)301d3af90a5SKuninori Morimoto static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv,
302d3af90a5SKuninori Morimoto struct usbhs_fifo *fifo)
303e8d548d5SKuninori Morimoto {
304d3af90a5SKuninori Morimoto return usbhs_read(priv, fifo->ctr) & DTLN_MASK;
305e8d548d5SKuninori Morimoto }
306e8d548d5SKuninori Morimoto
usbhsf_fifo_unselect(struct usbhs_pipe * pipe,struct usbhs_fifo * fifo)307d77e3f4eSKuninori Morimoto static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe,
308d77e3f4eSKuninori Morimoto struct usbhs_fifo *fifo)
309d77e3f4eSKuninori Morimoto {
310d77e3f4eSKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
311d77e3f4eSKuninori Morimoto
312d77e3f4eSKuninori Morimoto usbhs_pipe_select_fifo(pipe, NULL);
313d77e3f4eSKuninori Morimoto usbhs_write(priv, fifo->sel, 0);
314d77e3f4eSKuninori Morimoto }
315d77e3f4eSKuninori Morimoto
usbhsf_fifo_select(struct usbhs_pipe * pipe,struct usbhs_fifo * fifo,int write)316d3af90a5SKuninori Morimoto static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
317d3af90a5SKuninori Morimoto struct usbhs_fifo *fifo,
318d3af90a5SKuninori Morimoto int write)
319e8d548d5SKuninori Morimoto {
320e8d548d5SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
321e8d548d5SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
322e8d548d5SKuninori Morimoto int timeout = 1024;
323e8d548d5SKuninori Morimoto u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */
324e8d548d5SKuninori Morimoto u16 base = usbhs_pipe_number(pipe); /* CURPIPE */
325e8d548d5SKuninori Morimoto
326d77e3f4eSKuninori Morimoto if (usbhs_pipe_is_busy(pipe) ||
327d77e3f4eSKuninori Morimoto usbhsf_fifo_is_busy(fifo))
328d77e3f4eSKuninori Morimoto return -EBUSY;
329d77e3f4eSKuninori Morimoto
33092352071SKuninori Morimoto if (usbhs_pipe_is_dcp(pipe)) {
331e8d548d5SKuninori Morimoto base |= (1 == write) << 5; /* ISEL */
332e8d548d5SKuninori Morimoto
33392352071SKuninori Morimoto if (usbhs_mod_is_host(priv))
33492352071SKuninori Morimoto usbhs_dcp_dir_for_host(pipe, write);
33592352071SKuninori Morimoto }
33692352071SKuninori Morimoto
337e8d548d5SKuninori Morimoto /* "base" will be used below */
338d3af90a5SKuninori Morimoto usbhs_write(priv, fifo->sel, base | MBW_32);
339e8d548d5SKuninori Morimoto
340e8d548d5SKuninori Morimoto /* check ISEL and CURPIPE value */
341e8d548d5SKuninori Morimoto while (timeout--) {
342d77e3f4eSKuninori Morimoto if (base == (mask & usbhs_read(priv, fifo->sel))) {
343d77e3f4eSKuninori Morimoto usbhs_pipe_select_fifo(pipe, fifo);
344e8d548d5SKuninori Morimoto return 0;
345d77e3f4eSKuninori Morimoto }
346e8d548d5SKuninori Morimoto udelay(10);
347e8d548d5SKuninori Morimoto }
348e8d548d5SKuninori Morimoto
349e8d548d5SKuninori Morimoto dev_err(dev, "fifo select error\n");
350e8d548d5SKuninori Morimoto
351e8d548d5SKuninori Morimoto return -EIO;
352e8d548d5SKuninori Morimoto }
353e8d548d5SKuninori Morimoto
354e8d548d5SKuninori Morimoto /*
3559e74d601SKuninori Morimoto * DCP status stage
3569e74d601SKuninori Morimoto */
usbhs_dcp_dir_switch_to_write(struct usbhs_pkt * pkt,int * is_done)3579e74d601SKuninori Morimoto static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
3589e74d601SKuninori Morimoto {
3599e74d601SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
3609e74d601SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
3619e74d601SKuninori Morimoto struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
3629e74d601SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
3639e74d601SKuninori Morimoto int ret;
3649e74d601SKuninori Morimoto
3659e74d601SKuninori Morimoto usbhs_pipe_disable(pipe);
3669e74d601SKuninori Morimoto
3679e74d601SKuninori Morimoto ret = usbhsf_fifo_select(pipe, fifo, 1);
3689e74d601SKuninori Morimoto if (ret < 0) {
369*cc7f8825SColin Ian King dev_err(dev, "%s() failed\n", __func__);
3709e74d601SKuninori Morimoto return ret;
3719e74d601SKuninori Morimoto }
3729e74d601SKuninori Morimoto
3739e74d601SKuninori Morimoto usbhs_pipe_sequence_data1(pipe); /* DATA1 */
3749e74d601SKuninori Morimoto
3759e74d601SKuninori Morimoto usbhsf_fifo_clear(pipe, fifo);
3769e74d601SKuninori Morimoto usbhsf_send_terminator(pipe, fifo);
3779e74d601SKuninori Morimoto
3789e74d601SKuninori Morimoto usbhsf_fifo_unselect(pipe, fifo);
3799e74d601SKuninori Morimoto
3809e74d601SKuninori Morimoto usbhsf_tx_irq_ctrl(pipe, 1);
3819e74d601SKuninori Morimoto usbhs_pipe_enable(pipe);
3829e74d601SKuninori Morimoto
3839e74d601SKuninori Morimoto return ret;
3849e74d601SKuninori Morimoto }
3859e74d601SKuninori Morimoto
usbhs_dcp_dir_switch_to_read(struct usbhs_pkt * pkt,int * is_done)3869e74d601SKuninori Morimoto static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done)
3879e74d601SKuninori Morimoto {
3889e74d601SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
3899e74d601SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
3909e74d601SKuninori Morimoto struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
3919e74d601SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
3929e74d601SKuninori Morimoto int ret;
3939e74d601SKuninori Morimoto
3949e74d601SKuninori Morimoto usbhs_pipe_disable(pipe);
3959e74d601SKuninori Morimoto
3969e74d601SKuninori Morimoto ret = usbhsf_fifo_select(pipe, fifo, 0);
3979e74d601SKuninori Morimoto if (ret < 0) {
3989e74d601SKuninori Morimoto dev_err(dev, "%s() fail\n", __func__);
3999e74d601SKuninori Morimoto return ret;
4009e74d601SKuninori Morimoto }
4019e74d601SKuninori Morimoto
4029e74d601SKuninori Morimoto usbhs_pipe_sequence_data1(pipe); /* DATA1 */
4039e74d601SKuninori Morimoto usbhsf_fifo_clear(pipe, fifo);
4049e74d601SKuninori Morimoto
4059e74d601SKuninori Morimoto usbhsf_fifo_unselect(pipe, fifo);
4069e74d601SKuninori Morimoto
4079e74d601SKuninori Morimoto usbhsf_rx_irq_ctrl(pipe, 1);
4089e74d601SKuninori Morimoto usbhs_pipe_enable(pipe);
4099e74d601SKuninori Morimoto
4109e74d601SKuninori Morimoto return ret;
4119e74d601SKuninori Morimoto
4129e74d601SKuninori Morimoto }
4139e74d601SKuninori Morimoto
usbhs_dcp_dir_switch_done(struct usbhs_pkt * pkt,int * is_done)4149e74d601SKuninori Morimoto static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done)
4159e74d601SKuninori Morimoto {
4169e74d601SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
4179e74d601SKuninori Morimoto
4189e74d601SKuninori Morimoto if (pkt->handler == &usbhs_dcp_status_stage_in_handler)
4199e74d601SKuninori Morimoto usbhsf_tx_irq_ctrl(pipe, 0);
4209e74d601SKuninori Morimoto else
4219e74d601SKuninori Morimoto usbhsf_rx_irq_ctrl(pipe, 0);
4229e74d601SKuninori Morimoto
4239e74d601SKuninori Morimoto pkt->actual = pkt->length;
4249e74d601SKuninori Morimoto *is_done = 1;
4259e74d601SKuninori Morimoto
4269e74d601SKuninori Morimoto return 0;
4279e74d601SKuninori Morimoto }
4289e74d601SKuninori Morimoto
429fcb42e23SJulia Lawall const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = {
4309e74d601SKuninori Morimoto .prepare = usbhs_dcp_dir_switch_to_write,
4319e74d601SKuninori Morimoto .try_run = usbhs_dcp_dir_switch_done,
4329e74d601SKuninori Morimoto };
4339e74d601SKuninori Morimoto
434fcb42e23SJulia Lawall const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = {
4359e74d601SKuninori Morimoto .prepare = usbhs_dcp_dir_switch_to_read,
4369e74d601SKuninori Morimoto .try_run = usbhs_dcp_dir_switch_done,
4379e74d601SKuninori Morimoto };
4389e74d601SKuninori Morimoto
4399e74d601SKuninori Morimoto /*
4409e74d601SKuninori Morimoto * DCP data stage (push)
4419e74d601SKuninori Morimoto */
usbhsf_dcp_data_stage_try_push(struct usbhs_pkt * pkt,int * is_done)4429e74d601SKuninori Morimoto static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done)
4439e74d601SKuninori Morimoto {
4449e74d601SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
4459e74d601SKuninori Morimoto
4469e74d601SKuninori Morimoto usbhs_pipe_sequence_data1(pipe); /* DATA1 */
4479e74d601SKuninori Morimoto
4489e74d601SKuninori Morimoto /*
4499e74d601SKuninori Morimoto * change handler to PIO push
4509e74d601SKuninori Morimoto */
4519e74d601SKuninori Morimoto pkt->handler = &usbhs_fifo_pio_push_handler;
4529e74d601SKuninori Morimoto
4539e74d601SKuninori Morimoto return pkt->handler->prepare(pkt, is_done);
4549e74d601SKuninori Morimoto }
4559e74d601SKuninori Morimoto
456fcb42e23SJulia Lawall const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = {
4579e74d601SKuninori Morimoto .prepare = usbhsf_dcp_data_stage_try_push,
4589e74d601SKuninori Morimoto };
4599e74d601SKuninori Morimoto
4609e74d601SKuninori Morimoto /*
4619e74d601SKuninori Morimoto * DCP data stage (pop)
4629e74d601SKuninori Morimoto */
usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt * pkt,int * is_done)4639e74d601SKuninori Morimoto static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt,
4649e74d601SKuninori Morimoto int *is_done)
4659e74d601SKuninori Morimoto {
4669e74d601SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
4679e74d601SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
4689e74d601SKuninori Morimoto struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
4699e74d601SKuninori Morimoto
4709e74d601SKuninori Morimoto if (usbhs_pipe_is_busy(pipe))
4719e74d601SKuninori Morimoto return 0;
4729e74d601SKuninori Morimoto
4739e74d601SKuninori Morimoto /*
4749e74d601SKuninori Morimoto * prepare pop for DCP should
4759e74d601SKuninori Morimoto * - change DCP direction,
4769e74d601SKuninori Morimoto * - clear fifo
4779e74d601SKuninori Morimoto * - DATA1
4789e74d601SKuninori Morimoto */
4799e74d601SKuninori Morimoto usbhs_pipe_disable(pipe);
4809e74d601SKuninori Morimoto
4819e74d601SKuninori Morimoto usbhs_pipe_sequence_data1(pipe); /* DATA1 */
4829e74d601SKuninori Morimoto
4839e74d601SKuninori Morimoto usbhsf_fifo_select(pipe, fifo, 0);
4849e74d601SKuninori Morimoto usbhsf_fifo_clear(pipe, fifo);
4859e74d601SKuninori Morimoto usbhsf_fifo_unselect(pipe, fifo);
4869e74d601SKuninori Morimoto
4879e74d601SKuninori Morimoto /*
4889e74d601SKuninori Morimoto * change handler to PIO pop
4899e74d601SKuninori Morimoto */
4909e74d601SKuninori Morimoto pkt->handler = &usbhs_fifo_pio_pop_handler;
4919e74d601SKuninori Morimoto
4929e74d601SKuninori Morimoto return pkt->handler->prepare(pkt, is_done);
4939e74d601SKuninori Morimoto }
4949e74d601SKuninori Morimoto
495fcb42e23SJulia Lawall const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = {
4969e74d601SKuninori Morimoto .prepare = usbhsf_dcp_data_stage_prepare_pop,
4979e74d601SKuninori Morimoto };
4989e74d601SKuninori Morimoto
4999e74d601SKuninori Morimoto /*
500233f519dSKuninori Morimoto * PIO push handler
501e8d548d5SKuninori Morimoto */
usbhsf_pio_try_push(struct usbhs_pkt * pkt,int * is_done)5020cb7e61dSKuninori Morimoto static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
503e8d548d5SKuninori Morimoto {
5044bd04811SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
505e8d548d5SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
506659d4954SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
507d3af90a5SKuninori Morimoto struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
508d3af90a5SKuninori Morimoto void __iomem *addr = priv->base + fifo->port;
509659d4954SKuninori Morimoto u8 *buf;
510e8d548d5SKuninori Morimoto int maxp = usbhs_pipe_get_maxpacket(pipe);
511e8d548d5SKuninori Morimoto int total_len;
5124bd04811SKuninori Morimoto int i, ret, len;
51397664a20SKuninori Morimoto int is_short;
514e8d548d5SKuninori Morimoto
5153edeee38SKuninori Morimoto usbhs_pipe_data_sequence(pipe, pkt->sequence);
5163edeee38SKuninori Morimoto pkt->sequence = -1; /* -1 sequence will be ignored */
5173edeee38SKuninori Morimoto
5181c90ee0bSKuninori Morimoto usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
5191c90ee0bSKuninori Morimoto
520d3af90a5SKuninori Morimoto ret = usbhsf_fifo_select(pipe, fifo, 1);
521e8d548d5SKuninori Morimoto if (ret < 0)
522d77e3f4eSKuninori Morimoto return 0;
523e8d548d5SKuninori Morimoto
524dad67397SKuninori Morimoto ret = usbhs_pipe_is_accessible(pipe);
5254ef85e0fSKuninori Morimoto if (ret < 0) {
5264ef85e0fSKuninori Morimoto /* inaccessible pipe is not an error */
5274ef85e0fSKuninori Morimoto ret = 0;
528659d4954SKuninori Morimoto goto usbhs_fifo_write_busy;
5294ef85e0fSKuninori Morimoto }
530e8d548d5SKuninori Morimoto
531d3af90a5SKuninori Morimoto ret = usbhsf_fifo_barrier(priv, fifo);
532e8d548d5SKuninori Morimoto if (ret < 0)
533659d4954SKuninori Morimoto goto usbhs_fifo_write_busy;
534e8d548d5SKuninori Morimoto
535659d4954SKuninori Morimoto buf = pkt->buf + pkt->actual;
536659d4954SKuninori Morimoto len = pkt->length - pkt->actual;
537659d4954SKuninori Morimoto len = min(len, maxp);
538e8d548d5SKuninori Morimoto total_len = len;
539659d4954SKuninori Morimoto is_short = total_len < maxp;
540e8d548d5SKuninori Morimoto
541e8d548d5SKuninori Morimoto /*
542e8d548d5SKuninori Morimoto * FIXME
543e8d548d5SKuninori Morimoto *
544e8d548d5SKuninori Morimoto * 32-bit access only
545e8d548d5SKuninori Morimoto */
546659d4954SKuninori Morimoto if (len >= 4 && !((unsigned long)buf & 0x03)) {
547e8d548d5SKuninori Morimoto iowrite32_rep(addr, buf, len / 4);
548e8d548d5SKuninori Morimoto len %= 4;
549e8d548d5SKuninori Morimoto buf += total_len - len;
550e8d548d5SKuninori Morimoto }
551e8d548d5SKuninori Morimoto
552e8d548d5SKuninori Morimoto /* the rest operation */
553f7560669SChris Brandt if (usbhs_get_dparam(priv, cfifo_byte_addr)) {
554f7560669SChris Brandt for (i = 0; i < len; i++)
555f7560669SChris Brandt iowrite8(buf[i], addr + (i & 0x03));
556f7560669SChris Brandt } else {
557e8d548d5SKuninori Morimoto for (i = 0; i < len; i++)
558e8d548d5SKuninori Morimoto iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
559f7560669SChris Brandt }
560e8d548d5SKuninori Morimoto
561659d4954SKuninori Morimoto /*
562659d4954SKuninori Morimoto * variable update
563659d4954SKuninori Morimoto */
564659d4954SKuninori Morimoto pkt->actual += total_len;
565659d4954SKuninori Morimoto
566659d4954SKuninori Morimoto if (pkt->actual < pkt->length)
56797664a20SKuninori Morimoto *is_done = 0; /* there are remainder data */
568659d4954SKuninori Morimoto else if (is_short)
56997664a20SKuninori Morimoto *is_done = 1; /* short packet */
570659d4954SKuninori Morimoto else
57197664a20SKuninori Morimoto *is_done = !pkt->zero; /* send zero packet ? */
572659d4954SKuninori Morimoto
573659d4954SKuninori Morimoto /*
574659d4954SKuninori Morimoto * pipe/irq handling
575659d4954SKuninori Morimoto */
576659d4954SKuninori Morimoto if (is_short)
577d3af90a5SKuninori Morimoto usbhsf_send_terminator(pipe, fifo);
578e8d548d5SKuninori Morimoto
57997664a20SKuninori Morimoto usbhsf_tx_irq_ctrl(pipe, !*is_done);
5808355b2b3SYoshihiro Shimoda usbhs_pipe_running(pipe, !*is_done);
5814bd04811SKuninori Morimoto usbhs_pipe_enable(pipe);
5824bd04811SKuninori Morimoto
583659d4954SKuninori Morimoto dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n",
584659d4954SKuninori Morimoto usbhs_pipe_number(pipe),
58597664a20SKuninori Morimoto pkt->length, pkt->actual, *is_done, pkt->zero);
586659d4954SKuninori Morimoto
587d77e3f4eSKuninori Morimoto usbhsf_fifo_unselect(pipe, fifo);
588d77e3f4eSKuninori Morimoto
5894bd04811SKuninori Morimoto return 0;
590659d4954SKuninori Morimoto
591659d4954SKuninori Morimoto usbhs_fifo_write_busy:
592d77e3f4eSKuninori Morimoto usbhsf_fifo_unselect(pipe, fifo);
593d77e3f4eSKuninori Morimoto
594659d4954SKuninori Morimoto /*
595659d4954SKuninori Morimoto * pipe is busy.
596659d4954SKuninori Morimoto * retry in interrupt
597659d4954SKuninori Morimoto */
598659d4954SKuninori Morimoto usbhsf_tx_irq_ctrl(pipe, 1);
5998355b2b3SYoshihiro Shimoda usbhs_pipe_running(pipe, 1);
600659d4954SKuninori Morimoto
601659d4954SKuninori Morimoto return ret;
602e8d548d5SKuninori Morimoto }
603e8d548d5SKuninori Morimoto
usbhsf_pio_prepare_push(struct usbhs_pkt * pkt,int * is_done)6048355b2b3SYoshihiro Shimoda static int usbhsf_pio_prepare_push(struct usbhs_pkt *pkt, int *is_done)
6058355b2b3SYoshihiro Shimoda {
6068355b2b3SYoshihiro Shimoda if (usbhs_pipe_is_running(pkt->pipe))
6078355b2b3SYoshihiro Shimoda return 0;
6088355b2b3SYoshihiro Shimoda
6098355b2b3SYoshihiro Shimoda return usbhsf_pio_try_push(pkt, is_done);
6108355b2b3SYoshihiro Shimoda }
6118355b2b3SYoshihiro Shimoda
612fcb42e23SJulia Lawall const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
6138355b2b3SYoshihiro Shimoda .prepare = usbhsf_pio_prepare_push,
6140cb7e61dSKuninori Morimoto .try_run = usbhsf_pio_try_push,
615dad67397SKuninori Morimoto };
616dad67397SKuninori Morimoto
617233f519dSKuninori Morimoto /*
618233f519dSKuninori Morimoto * PIO pop handler
619233f519dSKuninori Morimoto */
usbhsf_prepare_pop(struct usbhs_pkt * pkt,int * is_done)62097664a20SKuninori Morimoto static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
621e8d548d5SKuninori Morimoto {
622dad67397SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
623e73d42f1SKazuya Mizuguchi struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
624e73d42f1SKazuya Mizuguchi struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
625d77e3f4eSKuninori Morimoto
626d77e3f4eSKuninori Morimoto if (usbhs_pipe_is_busy(pipe))
627d77e3f4eSKuninori Morimoto return 0;
628e8d548d5SKuninori Morimoto
6298355b2b3SYoshihiro Shimoda if (usbhs_pipe_is_running(pipe))
6308355b2b3SYoshihiro Shimoda return 0;
6318355b2b3SYoshihiro Shimoda
632e8d548d5SKuninori Morimoto /*
633d77e3f4eSKuninori Morimoto * pipe enable to prepare packet receive
634e8d548d5SKuninori Morimoto */
6353edeee38SKuninori Morimoto usbhs_pipe_data_sequence(pipe, pkt->sequence);
6363edeee38SKuninori Morimoto pkt->sequence = -1; /* -1 sequence will be ignored */
637e8d548d5SKuninori Morimoto
638e73d42f1SKazuya Mizuguchi if (usbhs_pipe_is_dcp(pipe))
639e73d42f1SKazuya Mizuguchi usbhsf_fifo_clear(pipe, fifo);
640e73d42f1SKazuya Mizuguchi
6411c90ee0bSKuninori Morimoto usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length);
642e8d548d5SKuninori Morimoto usbhs_pipe_enable(pipe);
6438355b2b3SYoshihiro Shimoda usbhs_pipe_running(pipe, 1);
644659d4954SKuninori Morimoto usbhsf_rx_irq_ctrl(pipe, 1);
645e8d548d5SKuninori Morimoto
646d3af90a5SKuninori Morimoto return 0;
647e8d548d5SKuninori Morimoto }
648e8d548d5SKuninori Morimoto
usbhsf_pio_try_pop(struct usbhs_pkt * pkt,int * is_done)6490cb7e61dSKuninori Morimoto static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
650e8d548d5SKuninori Morimoto {
6514bd04811SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
652e8d548d5SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
653659d4954SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
654d3af90a5SKuninori Morimoto struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
655d3af90a5SKuninori Morimoto void __iomem *addr = priv->base + fifo->port;
656659d4954SKuninori Morimoto u8 *buf;
657659d4954SKuninori Morimoto u32 data = 0;
658659d4954SKuninori Morimoto int maxp = usbhs_pipe_get_maxpacket(pipe);
6594bd04811SKuninori Morimoto int rcv_len, len;
660e8d548d5SKuninori Morimoto int i, ret;
6614bd04811SKuninori Morimoto int total_len = 0;
662e8d548d5SKuninori Morimoto
663d3af90a5SKuninori Morimoto ret = usbhsf_fifo_select(pipe, fifo, 0);
664e8d548d5SKuninori Morimoto if (ret < 0)
665d77e3f4eSKuninori Morimoto return 0;
666e8d548d5SKuninori Morimoto
667d3af90a5SKuninori Morimoto ret = usbhsf_fifo_barrier(priv, fifo);
668e8d548d5SKuninori Morimoto if (ret < 0)
669d77e3f4eSKuninori Morimoto goto usbhs_fifo_read_busy;
670e8d548d5SKuninori Morimoto
671d3af90a5SKuninori Morimoto rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
672e8d548d5SKuninori Morimoto
673659d4954SKuninori Morimoto buf = pkt->buf + pkt->actual;
674659d4954SKuninori Morimoto len = pkt->length - pkt->actual;
675659d4954SKuninori Morimoto len = min(len, rcv_len);
676659d4954SKuninori Morimoto total_len = len;
677659d4954SKuninori Morimoto
678e8d548d5SKuninori Morimoto /*
6796ff5d09bSKuninori Morimoto * update actual length first here to decide disable pipe.
6806ff5d09bSKuninori Morimoto * if this pipe keeps BUF status and all data were popped,
6816ff5d09bSKuninori Morimoto * then, next interrupt/token will be issued again
6826ff5d09bSKuninori Morimoto */
6836ff5d09bSKuninori Morimoto pkt->actual += total_len;
6846ff5d09bSKuninori Morimoto
6856ff5d09bSKuninori Morimoto if ((pkt->actual == pkt->length) || /* receive all data */
6866ff5d09bSKuninori Morimoto (total_len < maxp)) { /* short packet */
6876ff5d09bSKuninori Morimoto *is_done = 1;
6886ff5d09bSKuninori Morimoto usbhsf_rx_irq_ctrl(pipe, 0);
6898355b2b3SYoshihiro Shimoda usbhs_pipe_running(pipe, 0);
69093fb9127SYoshihiro Shimoda /*
69193fb9127SYoshihiro Shimoda * If function mode, since this controller is possible to enter
69293fb9127SYoshihiro Shimoda * Control Write status stage at this timing, this driver
69393fb9127SYoshihiro Shimoda * should not disable the pipe. If such a case happens, this
69493fb9127SYoshihiro Shimoda * controller is not able to complete the status stage.
69593fb9127SYoshihiro Shimoda */
69693fb9127SYoshihiro Shimoda if (!usbhs_mod_is_host(priv) && !usbhs_pipe_is_dcp(pipe))
6976ff5d09bSKuninori Morimoto usbhs_pipe_disable(pipe); /* disable pipe first */
6986ff5d09bSKuninori Morimoto }
6996ff5d09bSKuninori Morimoto
7006ff5d09bSKuninori Morimoto /*
701e8d548d5SKuninori Morimoto * Buffer clear if Zero-Length packet
702e8d548d5SKuninori Morimoto *
703e8d548d5SKuninori Morimoto * see
704e8d548d5SKuninori Morimoto * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
705e8d548d5SKuninori Morimoto */
706e8d548d5SKuninori Morimoto if (0 == rcv_len) {
7073edeee38SKuninori Morimoto pkt->zero = 1;
708d3af90a5SKuninori Morimoto usbhsf_fifo_clear(pipe, fifo);
7094bd04811SKuninori Morimoto goto usbhs_fifo_read_end;
710e8d548d5SKuninori Morimoto }
711e8d548d5SKuninori Morimoto
712e8d548d5SKuninori Morimoto /*
713e8d548d5SKuninori Morimoto * FIXME
714e8d548d5SKuninori Morimoto *
715e8d548d5SKuninori Morimoto * 32-bit access only
716e8d548d5SKuninori Morimoto */
717659d4954SKuninori Morimoto if (len >= 4 && !((unsigned long)buf & 0x03)) {
718e8d548d5SKuninori Morimoto ioread32_rep(addr, buf, len / 4);
719e8d548d5SKuninori Morimoto len %= 4;
720659d4954SKuninori Morimoto buf += total_len - len;
721e8d548d5SKuninori Morimoto }
722e8d548d5SKuninori Morimoto
723e8d548d5SKuninori Morimoto /* the rest operation */
724e8d548d5SKuninori Morimoto for (i = 0; i < len; i++) {
725e8d548d5SKuninori Morimoto if (!(i & 0x03))
726e8d548d5SKuninori Morimoto data = ioread32(addr);
727e8d548d5SKuninori Morimoto
728e8d548d5SKuninori Morimoto buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
729e8d548d5SKuninori Morimoto }
730e8d548d5SKuninori Morimoto
7314bd04811SKuninori Morimoto usbhs_fifo_read_end:
732659d4954SKuninori Morimoto dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
733659d4954SKuninori Morimoto usbhs_pipe_number(pipe),
73497664a20SKuninori Morimoto pkt->length, pkt->actual, *is_done, pkt->zero);
7354bd04811SKuninori Morimoto
736d77e3f4eSKuninori Morimoto usbhs_fifo_read_busy:
737d77e3f4eSKuninori Morimoto usbhsf_fifo_unselect(pipe, fifo);
738d77e3f4eSKuninori Morimoto
739d77e3f4eSKuninori Morimoto return ret;
740e8d548d5SKuninori Morimoto }
741dad67397SKuninori Morimoto
742fcb42e23SJulia Lawall const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
743dad67397SKuninori Morimoto .prepare = usbhsf_prepare_pop,
7440cb7e61dSKuninori Morimoto .try_run = usbhsf_pio_try_pop,
745dad67397SKuninori Morimoto };
746dad67397SKuninori Morimoto
747dad67397SKuninori Morimoto /*
748233f519dSKuninori Morimoto * DCP ctrol statge handler
749dad67397SKuninori Morimoto */
usbhsf_ctrl_stage_end(struct usbhs_pkt * pkt,int * is_done)75097664a20SKuninori Morimoto static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
751dad67397SKuninori Morimoto {
75297664a20SKuninori Morimoto usbhs_dcp_control_transfer_done(pkt->pipe);
753dad67397SKuninori Morimoto
75497664a20SKuninori Morimoto *is_done = 1;
755dad67397SKuninori Morimoto
756dad67397SKuninori Morimoto return 0;
757dad67397SKuninori Morimoto }
758dad67397SKuninori Morimoto
759fcb42e23SJulia Lawall const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = {
760dad67397SKuninori Morimoto .prepare = usbhsf_ctrl_stage_end,
761dad67397SKuninori Morimoto .try_run = usbhsf_ctrl_stage_end,
762dad67397SKuninori Morimoto };
763dad67397SKuninori Morimoto
764dad67397SKuninori Morimoto /*
765e73a9891SKuninori Morimoto * DMA fifo functions
766e73a9891SKuninori Morimoto */
usbhsf_dma_chan_get(struct usbhs_fifo * fifo,struct usbhs_pkt * pkt)767e73a9891SKuninori Morimoto static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo,
768e73a9891SKuninori Morimoto struct usbhs_pkt *pkt)
769e73a9891SKuninori Morimoto {
770e73a9891SKuninori Morimoto if (&usbhs_fifo_dma_push_handler == pkt->handler)
771e73a9891SKuninori Morimoto return fifo->tx_chan;
772e73a9891SKuninori Morimoto
773e73a9891SKuninori Morimoto if (&usbhs_fifo_dma_pop_handler == pkt->handler)
774e73a9891SKuninori Morimoto return fifo->rx_chan;
775e73a9891SKuninori Morimoto
776e73a9891SKuninori Morimoto return NULL;
777e73a9891SKuninori Morimoto }
778e73a9891SKuninori Morimoto
usbhsf_get_dma_fifo(struct usbhs_priv * priv,struct usbhs_pkt * pkt)779e73a9891SKuninori Morimoto static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv,
780e73a9891SKuninori Morimoto struct usbhs_pkt *pkt)
781e73a9891SKuninori Morimoto {
782e73a9891SKuninori Morimoto struct usbhs_fifo *fifo;
7833a2634a5SYoshihiro Shimoda int i;
784e73a9891SKuninori Morimoto
7853a2634a5SYoshihiro Shimoda usbhs_for_each_dfifo(priv, fifo, i) {
786e73a9891SKuninori Morimoto if (usbhsf_dma_chan_get(fifo, pkt) &&
787e73a9891SKuninori Morimoto !usbhsf_fifo_is_busy(fifo))
788e73a9891SKuninori Morimoto return fifo;
7893a2634a5SYoshihiro Shimoda }
790e73a9891SKuninori Morimoto
791e73a9891SKuninori Morimoto return NULL;
792e73a9891SKuninori Morimoto }
793e73a9891SKuninori Morimoto
794e73a9891SKuninori Morimoto #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE)
795e73a9891SKuninori Morimoto #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0)
__usbhsf_dma_ctrl(struct usbhs_pipe * pipe,struct usbhs_fifo * fifo,u16 dreqe)796e73a9891SKuninori Morimoto static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe,
797e73a9891SKuninori Morimoto struct usbhs_fifo *fifo,
798e73a9891SKuninori Morimoto u16 dreqe)
799e73a9891SKuninori Morimoto {
800e73a9891SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
801e73a9891SKuninori Morimoto
802e73a9891SKuninori Morimoto usbhs_bset(priv, fifo->sel, DREQE, dreqe);
803e73a9891SKuninori Morimoto }
804e73a9891SKuninori Morimoto
__usbhsf_dma_map_ctrl(struct usbhs_pkt * pkt,int map)805e73a9891SKuninori Morimoto static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
806e73a9891SKuninori Morimoto {
807e73a9891SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
808e73a9891SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
809e73a9891SKuninori Morimoto struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
810c3cdcac7SYoshihiro Shimoda struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
811c3cdcac7SYoshihiro Shimoda struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
812e73a9891SKuninori Morimoto
813c3cdcac7SYoshihiro Shimoda return info->dma_map_ctrl(chan->device->dev, pkt, map);
814e73a9891SKuninori Morimoto }
815e73a9891SKuninori Morimoto
816ea0efd68SYoshihiro Shimoda static void usbhsf_dma_complete(void *arg,
817ea0efd68SYoshihiro Shimoda const struct dmaengine_result *result);
usbhsf_dma_xfer_preparing(struct usbhs_pkt * pkt)818b2357839SYoshihiro Shimoda static void usbhsf_dma_xfer_preparing(struct usbhs_pkt *pkt)
819e73a9891SKuninori Morimoto {
820e73a9891SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
8214fdef698SYoshihiro Shimoda struct usbhs_fifo *fifo;
822e73a9891SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
823e73a9891SKuninori Morimoto struct dma_async_tx_descriptor *desc;
8244fdef698SYoshihiro Shimoda struct dma_chan *chan;
825e73a9891SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
82655ba4e5eSVinod Koul enum dma_transfer_direction dir;
827ea0efd68SYoshihiro Shimoda dma_cookie_t cookie;
828e73a9891SKuninori Morimoto
8294fdef698SYoshihiro Shimoda fifo = usbhs_pipe_to_fifo(pipe);
8304fdef698SYoshihiro Shimoda if (!fifo)
831b2357839SYoshihiro Shimoda return;
8324fdef698SYoshihiro Shimoda
8334fdef698SYoshihiro Shimoda chan = usbhsf_dma_chan_get(fifo, pkt);
83455ba4e5eSVinod Koul dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
835e73a9891SKuninori Morimoto
8362f0de9d8SKuninori Morimoto desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual,
8372f0de9d8SKuninori Morimoto pkt->trans, dir,
83816052827SAlexandre Bounine DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
839e73a9891SKuninori Morimoto if (!desc)
840b2357839SYoshihiro Shimoda return;
841e73a9891SKuninori Morimoto
842ea0efd68SYoshihiro Shimoda desc->callback_result = usbhsf_dma_complete;
843ea0efd68SYoshihiro Shimoda desc->callback_param = pkt;
844e73a9891SKuninori Morimoto
845ea0efd68SYoshihiro Shimoda cookie = dmaengine_submit(desc);
846ea0efd68SYoshihiro Shimoda if (cookie < 0) {
847e73a9891SKuninori Morimoto dev_err(dev, "Failed to submit dma descriptor\n");
848b2357839SYoshihiro Shimoda return;
849e73a9891SKuninori Morimoto }
850e73a9891SKuninori Morimoto
851e73a9891SKuninori Morimoto dev_dbg(dev, " %s %d (%d/ %d)\n",
852e73a9891SKuninori Morimoto fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero);
853e73a9891SKuninori Morimoto
8548355b2b3SYoshihiro Shimoda usbhs_pipe_running(pipe, 1);
8559b53d9afSYoshihiro Shimoda usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans);
856e73a9891SKuninori Morimoto dma_async_issue_pending(chan);
85729c7f3e6SKazuya Mizuguchi usbhsf_dma_start(pipe, fifo);
8589b53d9afSYoshihiro Shimoda usbhs_pipe_enable(pipe);
859b2357839SYoshihiro Shimoda }
8604fdef698SYoshihiro Shimoda
xfer_work(struct work_struct * work)861b2357839SYoshihiro Shimoda static void xfer_work(struct work_struct *work)
862b2357839SYoshihiro Shimoda {
863b2357839SYoshihiro Shimoda struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work);
864b2357839SYoshihiro Shimoda struct usbhs_pipe *pipe = pkt->pipe;
865b2357839SYoshihiro Shimoda struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
866b2357839SYoshihiro Shimoda unsigned long flags;
867b2357839SYoshihiro Shimoda
868b2357839SYoshihiro Shimoda usbhs_lock(priv, flags);
869b2357839SYoshihiro Shimoda usbhsf_dma_xfer_preparing(pkt);
8704fdef698SYoshihiro Shimoda usbhs_unlock(priv, flags);
871e73a9891SKuninori Morimoto }
872e73a9891SKuninori Morimoto
873233f519dSKuninori Morimoto /*
874233f519dSKuninori Morimoto * DMA push handler
875233f519dSKuninori Morimoto */
usbhsf_dma_prepare_push(struct usbhs_pkt * pkt,int * is_done)876e73a9891SKuninori Morimoto static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
877e73a9891SKuninori Morimoto {
878e73a9891SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
879e73a9891SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
880e73a9891SKuninori Morimoto struct usbhs_fifo *fifo;
881e73a9891SKuninori Morimoto int len = pkt->length - pkt->actual;
882e73a9891SKuninori Morimoto int ret;
883ab330cf3SYoshihiro Shimoda uintptr_t align_mask;
884e73a9891SKuninori Morimoto
885e73a9891SKuninori Morimoto if (usbhs_pipe_is_busy(pipe))
886e73a9891SKuninori Morimoto return 0;
887e73a9891SKuninori Morimoto
888e73a9891SKuninori Morimoto /* use PIO if packet is less than pio_dma_border or pipe is DCP */
889e73a9891SKuninori Morimoto if ((len < usbhs_get_dparam(priv, pio_dma_border)) ||
890700aa7ffSYoshihiro Shimoda usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
891e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_push;
892e73a9891SKuninori Morimoto
893ab330cf3SYoshihiro Shimoda /* check data length if this driver don't use USB-DMAC */
894ab330cf3SYoshihiro Shimoda if (!usbhs_get_dparam(priv, has_usb_dmac) && len & 0x7)
895e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_push;
896e73a9891SKuninori Morimoto
897ab330cf3SYoshihiro Shimoda /* check buffer alignment */
898ab330cf3SYoshihiro Shimoda align_mask = usbhs_get_dparam(priv, has_usb_dmac) ?
899ab330cf3SYoshihiro Shimoda USBHS_USB_DMAC_XFER_SIZE - 1 : 0x7;
900ab330cf3SYoshihiro Shimoda if ((uintptr_t)(pkt->buf + pkt->actual) & align_mask)
9019a12d097SKuninori Morimoto goto usbhsf_pio_prepare_push;
9029a12d097SKuninori Morimoto
9038355b2b3SYoshihiro Shimoda /* return at this time if the pipe is running */
9048355b2b3SYoshihiro Shimoda if (usbhs_pipe_is_running(pipe))
9058355b2b3SYoshihiro Shimoda return 0;
9068355b2b3SYoshihiro Shimoda
907e73a9891SKuninori Morimoto /* get enable DMA fifo */
908e73a9891SKuninori Morimoto fifo = usbhsf_get_dma_fifo(priv, pkt);
909e73a9891SKuninori Morimoto if (!fifo)
910e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_push;
911e73a9891SKuninori Morimoto
912e73a9891SKuninori Morimoto ret = usbhsf_fifo_select(pipe, fifo, 0);
913e73a9891SKuninori Morimoto if (ret < 0)
914e789ece1SYoshihiro Shimoda goto usbhsf_pio_prepare_push;
915e789ece1SYoshihiro Shimoda
916e789ece1SYoshihiro Shimoda if (usbhsf_dma_map(pkt) < 0)
917e789ece1SYoshihiro Shimoda goto usbhsf_pio_prepare_push_unselect;
918e73a9891SKuninori Morimoto
919e73a9891SKuninori Morimoto pkt->trans = len;
920e73a9891SKuninori Morimoto
9216490865cSYoshihiro Shimoda usbhsf_tx_irq_ctrl(pipe, 0);
922b2357839SYoshihiro Shimoda /* FIXME: Workaound for usb dmac that driver can be used in atomic */
923b2357839SYoshihiro Shimoda if (usbhs_get_dparam(priv, has_usb_dmac)) {
924b2357839SYoshihiro Shimoda usbhsf_dma_xfer_preparing(pkt);
925b2357839SYoshihiro Shimoda } else {
9266e4b74e4SGuennadi Liakhovetski INIT_WORK(&pkt->work, xfer_work);
9276e4b74e4SGuennadi Liakhovetski schedule_work(&pkt->work);
928b2357839SYoshihiro Shimoda }
929e73a9891SKuninori Morimoto
930e73a9891SKuninori Morimoto return 0;
931e73a9891SKuninori Morimoto
932e789ece1SYoshihiro Shimoda usbhsf_pio_prepare_push_unselect:
933e789ece1SYoshihiro Shimoda usbhsf_fifo_unselect(pipe, fifo);
934e73a9891SKuninori Morimoto usbhsf_pio_prepare_push:
935e73a9891SKuninori Morimoto /*
936e73a9891SKuninori Morimoto * change handler to PIO
937e73a9891SKuninori Morimoto */
938e73a9891SKuninori Morimoto pkt->handler = &usbhs_fifo_pio_push_handler;
939e73a9891SKuninori Morimoto
940e73a9891SKuninori Morimoto return pkt->handler->prepare(pkt, is_done);
941e73a9891SKuninori Morimoto }
942e73a9891SKuninori Morimoto
usbhsf_dma_push_done(struct usbhs_pkt * pkt,int * is_done)943e73a9891SKuninori Morimoto static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done)
944e73a9891SKuninori Morimoto {
945e73a9891SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
946c0ed8b23SYoshihiro Shimoda int is_short = pkt->trans % usbhs_pipe_get_maxpacket(pipe);
947e73a9891SKuninori Morimoto
948c0ed8b23SYoshihiro Shimoda pkt->actual += pkt->trans;
949e73a9891SKuninori Morimoto
950c0ed8b23SYoshihiro Shimoda if (pkt->actual < pkt->length)
951c0ed8b23SYoshihiro Shimoda *is_done = 0; /* there are remainder data */
952c0ed8b23SYoshihiro Shimoda else if (is_short)
953c0ed8b23SYoshihiro Shimoda *is_done = 1; /* short packet */
954c0ed8b23SYoshihiro Shimoda else
955e73a9891SKuninori Morimoto *is_done = !pkt->zero; /* send zero packet? */
956c0ed8b23SYoshihiro Shimoda
9578355b2b3SYoshihiro Shimoda usbhs_pipe_running(pipe, !*is_done);
958e73a9891SKuninori Morimoto
959e73a9891SKuninori Morimoto usbhsf_dma_stop(pipe, pipe->fifo);
960e73a9891SKuninori Morimoto usbhsf_dma_unmap(pkt);
961e73a9891SKuninori Morimoto usbhsf_fifo_unselect(pipe, pipe->fifo);
962e73a9891SKuninori Morimoto
963c0ed8b23SYoshihiro Shimoda if (!*is_done) {
964c0ed8b23SYoshihiro Shimoda /* change handler to PIO */
965c0ed8b23SYoshihiro Shimoda pkt->handler = &usbhs_fifo_pio_push_handler;
966c0ed8b23SYoshihiro Shimoda return pkt->handler->try_run(pkt, is_done);
967c0ed8b23SYoshihiro Shimoda }
968c0ed8b23SYoshihiro Shimoda
969e73a9891SKuninori Morimoto return 0;
970e73a9891SKuninori Morimoto }
971e73a9891SKuninori Morimoto
972fcb42e23SJulia Lawall const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
973e73a9891SKuninori Morimoto .prepare = usbhsf_dma_prepare_push,
974e73a9891SKuninori Morimoto .dma_done = usbhsf_dma_push_done,
975e73a9891SKuninori Morimoto };
976e73a9891SKuninori Morimoto
977233f519dSKuninori Morimoto /*
978233f519dSKuninori Morimoto * DMA pop handler
979233f519dSKuninori Morimoto */
980ab330cf3SYoshihiro Shimoda
usbhsf_dma_prepare_pop_with_rx_irq(struct usbhs_pkt * pkt,int * is_done)981ab330cf3SYoshihiro Shimoda static int usbhsf_dma_prepare_pop_with_rx_irq(struct usbhs_pkt *pkt,
982ab330cf3SYoshihiro Shimoda int *is_done)
983ab330cf3SYoshihiro Shimoda {
984ab330cf3SYoshihiro Shimoda return usbhsf_prepare_pop(pkt, is_done);
985ab330cf3SYoshihiro Shimoda }
986ab330cf3SYoshihiro Shimoda
usbhsf_dma_prepare_pop_with_usb_dmac(struct usbhs_pkt * pkt,int * is_done)987ab330cf3SYoshihiro Shimoda static int usbhsf_dma_prepare_pop_with_usb_dmac(struct usbhs_pkt *pkt,
988ab330cf3SYoshihiro Shimoda int *is_done)
989ab330cf3SYoshihiro Shimoda {
990ab330cf3SYoshihiro Shimoda struct usbhs_pipe *pipe = pkt->pipe;
991ab330cf3SYoshihiro Shimoda struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
992ab330cf3SYoshihiro Shimoda struct usbhs_fifo *fifo;
993ab330cf3SYoshihiro Shimoda int ret;
994ab330cf3SYoshihiro Shimoda
995ab330cf3SYoshihiro Shimoda if (usbhs_pipe_is_busy(pipe))
996ab330cf3SYoshihiro Shimoda return 0;
997ab330cf3SYoshihiro Shimoda
998ab330cf3SYoshihiro Shimoda /* use PIO if packet is less than pio_dma_border or pipe is DCP */
999ab330cf3SYoshihiro Shimoda if ((pkt->length < usbhs_get_dparam(priv, pio_dma_border)) ||
1000700aa7ffSYoshihiro Shimoda usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
1001ab330cf3SYoshihiro Shimoda goto usbhsf_pio_prepare_pop;
1002ab330cf3SYoshihiro Shimoda
1003ab330cf3SYoshihiro Shimoda fifo = usbhsf_get_dma_fifo(priv, pkt);
1004ab330cf3SYoshihiro Shimoda if (!fifo)
1005ab330cf3SYoshihiro Shimoda goto usbhsf_pio_prepare_pop;
1006ab330cf3SYoshihiro Shimoda
1007ab330cf3SYoshihiro Shimoda if ((uintptr_t)pkt->buf & (USBHS_USB_DMAC_XFER_SIZE - 1))
1008ab330cf3SYoshihiro Shimoda goto usbhsf_pio_prepare_pop;
1009ab330cf3SYoshihiro Shimoda
1010d6efa938SYoshihiro Shimoda /* return at this time if the pipe is running */
1011d6efa938SYoshihiro Shimoda if (usbhs_pipe_is_running(pipe))
1012d6efa938SYoshihiro Shimoda return 0;
1013d6efa938SYoshihiro Shimoda
1014ab330cf3SYoshihiro Shimoda usbhs_pipe_config_change_bfre(pipe, 1);
1015ab330cf3SYoshihiro Shimoda
1016ab330cf3SYoshihiro Shimoda ret = usbhsf_fifo_select(pipe, fifo, 0);
1017ab330cf3SYoshihiro Shimoda if (ret < 0)
1018ab330cf3SYoshihiro Shimoda goto usbhsf_pio_prepare_pop;
1019ab330cf3SYoshihiro Shimoda
1020ab330cf3SYoshihiro Shimoda if (usbhsf_dma_map(pkt) < 0)
1021ab330cf3SYoshihiro Shimoda goto usbhsf_pio_prepare_pop_unselect;
1022ab330cf3SYoshihiro Shimoda
1023ab330cf3SYoshihiro Shimoda /* DMA */
1024ab330cf3SYoshihiro Shimoda
1025ab330cf3SYoshihiro Shimoda /*
1026ab330cf3SYoshihiro Shimoda * usbhs_fifo_dma_pop_handler :: prepare
1027ab330cf3SYoshihiro Shimoda * enabled irq to come here.
1028ab330cf3SYoshihiro Shimoda * but it is no longer needed for DMA. disable it.
1029ab330cf3SYoshihiro Shimoda */
1030ab330cf3SYoshihiro Shimoda usbhsf_rx_irq_ctrl(pipe, 0);
1031ab330cf3SYoshihiro Shimoda
1032ab330cf3SYoshihiro Shimoda pkt->trans = pkt->length;
1033ab330cf3SYoshihiro Shimoda
1034b2357839SYoshihiro Shimoda usbhsf_dma_xfer_preparing(pkt);
1035ab330cf3SYoshihiro Shimoda
1036ab330cf3SYoshihiro Shimoda return 0;
1037ab330cf3SYoshihiro Shimoda
1038ab330cf3SYoshihiro Shimoda usbhsf_pio_prepare_pop_unselect:
1039ab330cf3SYoshihiro Shimoda usbhsf_fifo_unselect(pipe, fifo);
1040ab330cf3SYoshihiro Shimoda usbhsf_pio_prepare_pop:
1041ab330cf3SYoshihiro Shimoda
1042ab330cf3SYoshihiro Shimoda /*
1043ab330cf3SYoshihiro Shimoda * change handler to PIO
1044ab330cf3SYoshihiro Shimoda */
1045ab330cf3SYoshihiro Shimoda pkt->handler = &usbhs_fifo_pio_pop_handler;
1046ab330cf3SYoshihiro Shimoda usbhs_pipe_config_change_bfre(pipe, 0);
1047ab330cf3SYoshihiro Shimoda
1048ab330cf3SYoshihiro Shimoda return pkt->handler->prepare(pkt, is_done);
1049ab330cf3SYoshihiro Shimoda }
1050ab330cf3SYoshihiro Shimoda
usbhsf_dma_prepare_pop(struct usbhs_pkt * pkt,int * is_done)1051ab330cf3SYoshihiro Shimoda static int usbhsf_dma_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
1052ab330cf3SYoshihiro Shimoda {
1053ab330cf3SYoshihiro Shimoda struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1054ab330cf3SYoshihiro Shimoda
1055ab330cf3SYoshihiro Shimoda if (usbhs_get_dparam(priv, has_usb_dmac))
1056ab330cf3SYoshihiro Shimoda return usbhsf_dma_prepare_pop_with_usb_dmac(pkt, is_done);
1057ab330cf3SYoshihiro Shimoda else
1058ab330cf3SYoshihiro Shimoda return usbhsf_dma_prepare_pop_with_rx_irq(pkt, is_done);
1059ab330cf3SYoshihiro Shimoda }
1060ab330cf3SYoshihiro Shimoda
usbhsf_dma_try_pop_with_rx_irq(struct usbhs_pkt * pkt,int * is_done)1061ab330cf3SYoshihiro Shimoda static int usbhsf_dma_try_pop_with_rx_irq(struct usbhs_pkt *pkt, int *is_done)
1062e73a9891SKuninori Morimoto {
1063e73a9891SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
1064e73a9891SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1065e73a9891SKuninori Morimoto struct usbhs_fifo *fifo;
1066e73a9891SKuninori Morimoto int len, ret;
1067e73a9891SKuninori Morimoto
1068e73a9891SKuninori Morimoto if (usbhs_pipe_is_busy(pipe))
1069e73a9891SKuninori Morimoto return 0;
1070e73a9891SKuninori Morimoto
1071e73a9891SKuninori Morimoto if (usbhs_pipe_is_dcp(pipe))
1072e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_pop;
1073e73a9891SKuninori Morimoto
1074e73a9891SKuninori Morimoto /* get enable DMA fifo */
1075e73a9891SKuninori Morimoto fifo = usbhsf_get_dma_fifo(priv, pkt);
1076e73a9891SKuninori Morimoto if (!fifo)
1077e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_pop;
1078e73a9891SKuninori Morimoto
1079c9ae0c91SKuninori Morimoto if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
10809a12d097SKuninori Morimoto goto usbhsf_pio_prepare_pop;
10819a12d097SKuninori Morimoto
1082e73a9891SKuninori Morimoto ret = usbhsf_fifo_select(pipe, fifo, 0);
1083e73a9891SKuninori Morimoto if (ret < 0)
1084e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_pop;
1085e73a9891SKuninori Morimoto
1086e73a9891SKuninori Morimoto /* use PIO if packet is less than pio_dma_border */
1087e73a9891SKuninori Morimoto len = usbhsf_fifo_rcv_len(priv, fifo);
1088e73a9891SKuninori Morimoto len = min(pkt->length - pkt->actual, len);
108977975eecSKuninori Morimoto if (len & 0x7) /* 8byte alignment */
1090e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_pop_unselect;
1091e73a9891SKuninori Morimoto
1092e73a9891SKuninori Morimoto if (len < usbhs_get_dparam(priv, pio_dma_border))
1093e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_pop_unselect;
1094e73a9891SKuninori Morimoto
1095e73a9891SKuninori Morimoto ret = usbhsf_fifo_barrier(priv, fifo);
1096e73a9891SKuninori Morimoto if (ret < 0)
1097e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_pop_unselect;
1098e73a9891SKuninori Morimoto
1099e73a9891SKuninori Morimoto if (usbhsf_dma_map(pkt) < 0)
1100e73a9891SKuninori Morimoto goto usbhsf_pio_prepare_pop_unselect;
1101e73a9891SKuninori Morimoto
1102e73a9891SKuninori Morimoto /* DMA */
1103e73a9891SKuninori Morimoto
1104e73a9891SKuninori Morimoto /*
1105e73a9891SKuninori Morimoto * usbhs_fifo_dma_pop_handler :: prepare
1106e73a9891SKuninori Morimoto * enabled irq to come here.
1107e73a9891SKuninori Morimoto * but it is no longer needed for DMA. disable it.
1108e73a9891SKuninori Morimoto */
1109e73a9891SKuninori Morimoto usbhsf_rx_irq_ctrl(pipe, 0);
1110e73a9891SKuninori Morimoto
1111e73a9891SKuninori Morimoto pkt->trans = len;
1112e73a9891SKuninori Morimoto
11136e4b74e4SGuennadi Liakhovetski INIT_WORK(&pkt->work, xfer_work);
11146e4b74e4SGuennadi Liakhovetski schedule_work(&pkt->work);
1115e73a9891SKuninori Morimoto
1116e73a9891SKuninori Morimoto return 0;
1117e73a9891SKuninori Morimoto
1118e73a9891SKuninori Morimoto usbhsf_pio_prepare_pop_unselect:
1119e73a9891SKuninori Morimoto usbhsf_fifo_unselect(pipe, fifo);
1120e73a9891SKuninori Morimoto usbhsf_pio_prepare_pop:
1121e73a9891SKuninori Morimoto
1122e73a9891SKuninori Morimoto /*
1123e73a9891SKuninori Morimoto * change handler to PIO
1124e73a9891SKuninori Morimoto */
1125e73a9891SKuninori Morimoto pkt->handler = &usbhs_fifo_pio_pop_handler;
1126e73a9891SKuninori Morimoto
1127e73a9891SKuninori Morimoto return pkt->handler->try_run(pkt, is_done);
1128e73a9891SKuninori Morimoto }
1129e73a9891SKuninori Morimoto
usbhsf_dma_try_pop(struct usbhs_pkt * pkt,int * is_done)1130ab330cf3SYoshihiro Shimoda static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
1131ab330cf3SYoshihiro Shimoda {
1132ab330cf3SYoshihiro Shimoda struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1133ab330cf3SYoshihiro Shimoda
1134ab330cf3SYoshihiro Shimoda BUG_ON(usbhs_get_dparam(priv, has_usb_dmac));
1135ab330cf3SYoshihiro Shimoda
1136ab330cf3SYoshihiro Shimoda return usbhsf_dma_try_pop_with_rx_irq(pkt, is_done);
1137ab330cf3SYoshihiro Shimoda }
1138ab330cf3SYoshihiro Shimoda
usbhsf_dma_pop_done_with_rx_irq(struct usbhs_pkt * pkt,int * is_done)1139ab330cf3SYoshihiro Shimoda static int usbhsf_dma_pop_done_with_rx_irq(struct usbhs_pkt *pkt, int *is_done)
1140e73a9891SKuninori Morimoto {
1141e73a9891SKuninori Morimoto struct usbhs_pipe *pipe = pkt->pipe;
1142e73a9891SKuninori Morimoto int maxp = usbhs_pipe_get_maxpacket(pipe);
1143e73a9891SKuninori Morimoto
1144e73a9891SKuninori Morimoto usbhsf_dma_stop(pipe, pipe->fifo);
1145e73a9891SKuninori Morimoto usbhsf_dma_unmap(pkt);
1146e73a9891SKuninori Morimoto usbhsf_fifo_unselect(pipe, pipe->fifo);
1147e73a9891SKuninori Morimoto
1148e73a9891SKuninori Morimoto pkt->actual += pkt->trans;
1149e73a9891SKuninori Morimoto
1150e73a9891SKuninori Morimoto if ((pkt->actual == pkt->length) || /* receive all data */
1151e73a9891SKuninori Morimoto (pkt->trans < maxp)) { /* short packet */
1152e73a9891SKuninori Morimoto *is_done = 1;
11538355b2b3SYoshihiro Shimoda usbhs_pipe_running(pipe, 0);
1154e73a9891SKuninori Morimoto } else {
1155e73a9891SKuninori Morimoto /* re-enable */
11568355b2b3SYoshihiro Shimoda usbhs_pipe_running(pipe, 0);
1157e73a9891SKuninori Morimoto usbhsf_prepare_pop(pkt, is_done);
1158e73a9891SKuninori Morimoto }
1159e73a9891SKuninori Morimoto
1160e73a9891SKuninori Morimoto return 0;
1161e73a9891SKuninori Morimoto }
1162e73a9891SKuninori Morimoto
usbhs_dma_calc_received_size(struct usbhs_pkt * pkt,struct dma_chan * chan,int dtln)1163ab330cf3SYoshihiro Shimoda static size_t usbhs_dma_calc_received_size(struct usbhs_pkt *pkt,
1164ab330cf3SYoshihiro Shimoda struct dma_chan *chan, int dtln)
1165ab330cf3SYoshihiro Shimoda {
1166ab330cf3SYoshihiro Shimoda struct usbhs_pipe *pipe = pkt->pipe;
1167ab330cf3SYoshihiro Shimoda size_t received_size;
1168ab330cf3SYoshihiro Shimoda int maxp = usbhs_pipe_get_maxpacket(pipe);
1169ab330cf3SYoshihiro Shimoda
1170ea0efd68SYoshihiro Shimoda received_size = pkt->length - pkt->dma_result->residue;
1171ab330cf3SYoshihiro Shimoda
1172ab330cf3SYoshihiro Shimoda if (dtln) {
1173ab330cf3SYoshihiro Shimoda received_size -= USBHS_USB_DMAC_XFER_SIZE;
1174ab330cf3SYoshihiro Shimoda received_size &= ~(maxp - 1);
1175ab330cf3SYoshihiro Shimoda received_size += dtln;
1176ab330cf3SYoshihiro Shimoda }
1177ab330cf3SYoshihiro Shimoda
1178ab330cf3SYoshihiro Shimoda return received_size;
1179ab330cf3SYoshihiro Shimoda }
1180ab330cf3SYoshihiro Shimoda
usbhsf_dma_pop_done_with_usb_dmac(struct usbhs_pkt * pkt,int * is_done)1181ab330cf3SYoshihiro Shimoda static int usbhsf_dma_pop_done_with_usb_dmac(struct usbhs_pkt *pkt,
1182ab330cf3SYoshihiro Shimoda int *is_done)
1183ab330cf3SYoshihiro Shimoda {
1184ab330cf3SYoshihiro Shimoda struct usbhs_pipe *pipe = pkt->pipe;
1185ab330cf3SYoshihiro Shimoda struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1186ab330cf3SYoshihiro Shimoda struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
1187ab330cf3SYoshihiro Shimoda struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
1188ab330cf3SYoshihiro Shimoda int rcv_len;
1189ab330cf3SYoshihiro Shimoda
1190ab330cf3SYoshihiro Shimoda /*
1191ab330cf3SYoshihiro Shimoda * Since the driver disables rx_irq in DMA mode, the interrupt handler
1192ab330cf3SYoshihiro Shimoda * cannot the BRDYSTS. So, the function clears it here because the
1193ab330cf3SYoshihiro Shimoda * driver may use PIO mode next time.
1194ab330cf3SYoshihiro Shimoda */
1195ab330cf3SYoshihiro Shimoda usbhs_xxxsts_clear(priv, BRDYSTS, usbhs_pipe_number(pipe));
1196ab330cf3SYoshihiro Shimoda
1197ab330cf3SYoshihiro Shimoda rcv_len = usbhsf_fifo_rcv_len(priv, fifo);
1198ab330cf3SYoshihiro Shimoda usbhsf_fifo_clear(pipe, fifo);
1199ab330cf3SYoshihiro Shimoda pkt->actual = usbhs_dma_calc_received_size(pkt, chan, rcv_len);
1200ab330cf3SYoshihiro Shimoda
1201d6efa938SYoshihiro Shimoda usbhs_pipe_running(pipe, 0);
1202ab330cf3SYoshihiro Shimoda usbhsf_dma_stop(pipe, fifo);
1203ab330cf3SYoshihiro Shimoda usbhsf_dma_unmap(pkt);
1204ab330cf3SYoshihiro Shimoda usbhsf_fifo_unselect(pipe, pipe->fifo);
1205ab330cf3SYoshihiro Shimoda
1206ab330cf3SYoshihiro Shimoda /* The driver can assume the rx transaction is always "done" */
1207ab330cf3SYoshihiro Shimoda *is_done = 1;
1208ab330cf3SYoshihiro Shimoda
1209ab330cf3SYoshihiro Shimoda return 0;
1210ab330cf3SYoshihiro Shimoda }
1211ab330cf3SYoshihiro Shimoda
usbhsf_dma_pop_done(struct usbhs_pkt * pkt,int * is_done)1212ab330cf3SYoshihiro Shimoda static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done)
1213ab330cf3SYoshihiro Shimoda {
1214ab330cf3SYoshihiro Shimoda struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe);
1215ab330cf3SYoshihiro Shimoda
1216ab330cf3SYoshihiro Shimoda if (usbhs_get_dparam(priv, has_usb_dmac))
1217ab330cf3SYoshihiro Shimoda return usbhsf_dma_pop_done_with_usb_dmac(pkt, is_done);
1218ab330cf3SYoshihiro Shimoda else
1219ab330cf3SYoshihiro Shimoda return usbhsf_dma_pop_done_with_rx_irq(pkt, is_done);
1220ab330cf3SYoshihiro Shimoda }
1221ab330cf3SYoshihiro Shimoda
1222fcb42e23SJulia Lawall const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
1223ab330cf3SYoshihiro Shimoda .prepare = usbhsf_dma_prepare_pop,
1224e73a9891SKuninori Morimoto .try_run = usbhsf_dma_try_pop,
1225e73a9891SKuninori Morimoto .dma_done = usbhsf_dma_pop_done
1226e73a9891SKuninori Morimoto };
1227e73a9891SKuninori Morimoto
1228e73a9891SKuninori Morimoto /*
1229e73a9891SKuninori Morimoto * DMA setting
1230e73a9891SKuninori Morimoto */
usbhsf_dma_filter(struct dma_chan * chan,void * param)1231e73a9891SKuninori Morimoto static bool usbhsf_dma_filter(struct dma_chan *chan, void *param)
1232e73a9891SKuninori Morimoto {
1233e73a9891SKuninori Morimoto struct sh_dmae_slave *slave = param;
1234e73a9891SKuninori Morimoto
1235e73a9891SKuninori Morimoto /*
1236e73a9891SKuninori Morimoto * FIXME
1237e73a9891SKuninori Morimoto *
1238e73a9891SKuninori Morimoto * usbhs doesn't recognize id = 0 as valid DMA
1239e73a9891SKuninori Morimoto */
1240f19b7e0dSGuennadi Liakhovetski if (0 == slave->shdma_slave.slave_id)
1241e73a9891SKuninori Morimoto return false;
1242e73a9891SKuninori Morimoto
1243e73a9891SKuninori Morimoto chan->private = slave;
1244e73a9891SKuninori Morimoto
1245e73a9891SKuninori Morimoto return true;
1246e73a9891SKuninori Morimoto }
1247e73a9891SKuninori Morimoto
usbhsf_dma_quit(struct usbhs_priv * priv,struct usbhs_fifo * fifo)1248e73a9891SKuninori Morimoto static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo)
1249e73a9891SKuninori Morimoto {
1250e73a9891SKuninori Morimoto if (fifo->tx_chan)
1251e73a9891SKuninori Morimoto dma_release_channel(fifo->tx_chan);
1252e73a9891SKuninori Morimoto if (fifo->rx_chan)
1253e73a9891SKuninori Morimoto dma_release_channel(fifo->rx_chan);
1254e73a9891SKuninori Morimoto
1255e73a9891SKuninori Morimoto fifo->tx_chan = NULL;
1256e73a9891SKuninori Morimoto fifo->rx_chan = NULL;
1257e73a9891SKuninori Morimoto }
1258e73a9891SKuninori Morimoto
usbhsf_dma_init_pdev(struct usbhs_fifo * fifo)12596e3f53abSYoshihiro Shimoda static void usbhsf_dma_init_pdev(struct usbhs_fifo *fifo)
1260e73a9891SKuninori Morimoto {
1261e73a9891SKuninori Morimoto dma_cap_mask_t mask;
1262e73a9891SKuninori Morimoto
1263e73a9891SKuninori Morimoto dma_cap_zero(mask);
1264e73a9891SKuninori Morimoto dma_cap_set(DMA_SLAVE, mask);
1265e73a9891SKuninori Morimoto fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1266e73a9891SKuninori Morimoto &fifo->tx_slave);
1267e73a9891SKuninori Morimoto
1268e73a9891SKuninori Morimoto dma_cap_zero(mask);
1269e73a9891SKuninori Morimoto dma_cap_set(DMA_SLAVE, mask);
1270e73a9891SKuninori Morimoto fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter,
1271e73a9891SKuninori Morimoto &fifo->rx_slave);
12726e3f53abSYoshihiro Shimoda }
12736e3f53abSYoshihiro Shimoda
usbhsf_dma_init_dt(struct device * dev,struct usbhs_fifo * fifo,int channel)12747a96b784SYoshihiro Shimoda static void usbhsf_dma_init_dt(struct device *dev, struct usbhs_fifo *fifo,
12757a96b784SYoshihiro Shimoda int channel)
1276abd2dbf6SYoshihiro Shimoda {
12777a96b784SYoshihiro Shimoda char name[16];
12787a96b784SYoshihiro Shimoda
12797cc99f1eSYoshihiro Shimoda /*
12807cc99f1eSYoshihiro Shimoda * To avoid complex handing for DnFIFOs, the driver uses each
12817cc99f1eSYoshihiro Shimoda * DnFIFO as TX or RX direction (not bi-direction).
12827cc99f1eSYoshihiro Shimoda * So, the driver uses odd channels for TX, even channels for RX.
12837cc99f1eSYoshihiro Shimoda */
12847cc99f1eSYoshihiro Shimoda snprintf(name, sizeof(name), "ch%d", channel);
12857cc99f1eSYoshihiro Shimoda if (channel & 1) {
1286ba9f0f6eSPeter Ujfalusi fifo->tx_chan = dma_request_chan(dev, name);
1287ffb9da65SYoshihiro Shimoda if (IS_ERR(fifo->tx_chan))
1288ffb9da65SYoshihiro Shimoda fifo->tx_chan = NULL;
12897cc99f1eSYoshihiro Shimoda } else {
1290ba9f0f6eSPeter Ujfalusi fifo->rx_chan = dma_request_chan(dev, name);
1291ffb9da65SYoshihiro Shimoda if (IS_ERR(fifo->rx_chan))
1292ffb9da65SYoshihiro Shimoda fifo->rx_chan = NULL;
1293abd2dbf6SYoshihiro Shimoda }
12947cc99f1eSYoshihiro Shimoda }
1295abd2dbf6SYoshihiro Shimoda
usbhsf_dma_init(struct usbhs_priv * priv,struct usbhs_fifo * fifo,int channel)12967a96b784SYoshihiro Shimoda static void usbhsf_dma_init(struct usbhs_priv *priv, struct usbhs_fifo *fifo,
12977a96b784SYoshihiro Shimoda int channel)
12986e3f53abSYoshihiro Shimoda {
12996e3f53abSYoshihiro Shimoda struct device *dev = usbhs_priv_to_dev(priv);
13006e3f53abSYoshihiro Shimoda
130131e795c6SYoshihiro Shimoda if (dev_of_node(dev))
13027a96b784SYoshihiro Shimoda usbhsf_dma_init_dt(dev, fifo, channel);
1303abd2dbf6SYoshihiro Shimoda else
13046e3f53abSYoshihiro Shimoda usbhsf_dma_init_pdev(fifo);
1305e73a9891SKuninori Morimoto
1306e73a9891SKuninori Morimoto if (fifo->tx_chan || fifo->rx_chan)
13074ce68805SKuninori Morimoto dev_dbg(dev, "enable DMAEngine (%s%s%s)\n",
1308e73a9891SKuninori Morimoto fifo->name,
1309e73a9891SKuninori Morimoto fifo->tx_chan ? "[TX]" : " ",
1310e73a9891SKuninori Morimoto fifo->rx_chan ? "[RX]" : " ");
1311e73a9891SKuninori Morimoto }
1312e73a9891SKuninori Morimoto
1313e73a9891SKuninori Morimoto /*
1314dad67397SKuninori Morimoto * irq functions
1315dad67397SKuninori Morimoto */
usbhsf_irq_empty(struct usbhs_priv * priv,struct usbhs_irq_state * irq_state)1316dad67397SKuninori Morimoto static int usbhsf_irq_empty(struct usbhs_priv *priv,
1317dad67397SKuninori Morimoto struct usbhs_irq_state *irq_state)
1318dad67397SKuninori Morimoto {
1319dad67397SKuninori Morimoto struct usbhs_pipe *pipe;
1320dad67397SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
1321dad67397SKuninori Morimoto int i, ret;
1322dad67397SKuninori Morimoto
1323dad67397SKuninori Morimoto if (!irq_state->bempsts) {
1324dad67397SKuninori Morimoto dev_err(dev, "debug %s !!\n", __func__);
1325dad67397SKuninori Morimoto return -EIO;
1326dad67397SKuninori Morimoto }
1327dad67397SKuninori Morimoto
1328dad67397SKuninori Morimoto dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts);
1329dad67397SKuninori Morimoto
1330dad67397SKuninori Morimoto /*
1331dad67397SKuninori Morimoto * search interrupted "pipe"
1332dad67397SKuninori Morimoto * not "uep".
1333dad67397SKuninori Morimoto */
1334dad67397SKuninori Morimoto usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1335dad67397SKuninori Morimoto if (!(irq_state->bempsts & (1 << i)))
1336dad67397SKuninori Morimoto continue;
1337dad67397SKuninori Morimoto
133851b8a021SKuninori Morimoto ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1339dad67397SKuninori Morimoto if (ret < 0)
1340dad67397SKuninori Morimoto dev_err(dev, "irq_empty run_error %d : %d\n", i, ret);
1341dad67397SKuninori Morimoto }
1342dad67397SKuninori Morimoto
1343dad67397SKuninori Morimoto return 0;
1344dad67397SKuninori Morimoto }
1345dad67397SKuninori Morimoto
usbhsf_irq_ready(struct usbhs_priv * priv,struct usbhs_irq_state * irq_state)1346dad67397SKuninori Morimoto static int usbhsf_irq_ready(struct usbhs_priv *priv,
1347dad67397SKuninori Morimoto struct usbhs_irq_state *irq_state)
1348dad67397SKuninori Morimoto {
1349dad67397SKuninori Morimoto struct usbhs_pipe *pipe;
1350dad67397SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
1351dad67397SKuninori Morimoto int i, ret;
1352dad67397SKuninori Morimoto
1353dad67397SKuninori Morimoto if (!irq_state->brdysts) {
1354dad67397SKuninori Morimoto dev_err(dev, "debug %s !!\n", __func__);
1355dad67397SKuninori Morimoto return -EIO;
1356dad67397SKuninori Morimoto }
1357dad67397SKuninori Morimoto
1358dad67397SKuninori Morimoto dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts);
1359dad67397SKuninori Morimoto
1360dad67397SKuninori Morimoto /*
1361dad67397SKuninori Morimoto * search interrupted "pipe"
1362dad67397SKuninori Morimoto * not "uep".
1363dad67397SKuninori Morimoto */
1364dad67397SKuninori Morimoto usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
1365dad67397SKuninori Morimoto if (!(irq_state->brdysts & (1 << i)))
1366dad67397SKuninori Morimoto continue;
1367dad67397SKuninori Morimoto
136851b8a021SKuninori Morimoto ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN);
1369dad67397SKuninori Morimoto if (ret < 0)
1370dad67397SKuninori Morimoto dev_err(dev, "irq_ready run_error %d : %d\n", i, ret);
1371dad67397SKuninori Morimoto }
1372dad67397SKuninori Morimoto
1373dad67397SKuninori Morimoto return 0;
1374dad67397SKuninori Morimoto }
1375dad67397SKuninori Morimoto
usbhsf_dma_complete(void * arg,const struct dmaengine_result * result)1376ea0efd68SYoshihiro Shimoda static void usbhsf_dma_complete(void *arg,
1377ea0efd68SYoshihiro Shimoda const struct dmaengine_result *result)
1378e73a9891SKuninori Morimoto {
1379ea0efd68SYoshihiro Shimoda struct usbhs_pkt *pkt = arg;
1380ea0efd68SYoshihiro Shimoda struct usbhs_pipe *pipe = pkt->pipe;
1381e73a9891SKuninori Morimoto struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1382e73a9891SKuninori Morimoto struct device *dev = usbhs_priv_to_dev(priv);
1383e73a9891SKuninori Morimoto int ret;
1384e73a9891SKuninori Morimoto
1385ea0efd68SYoshihiro Shimoda pkt->dma_result = result;
138651b8a021SKuninori Morimoto ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE);
1387e73a9891SKuninori Morimoto if (ret < 0)
1388e73a9891SKuninori Morimoto dev_err(dev, "dma_complete run_error %d : %d\n",
1389e73a9891SKuninori Morimoto usbhs_pipe_number(pipe), ret);
1390e73a9891SKuninori Morimoto }
1391e73a9891SKuninori Morimoto
usbhs_fifo_clear_dcp(struct usbhs_pipe * pipe)1392cdeb7943SYoshihiro Shimoda void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe)
1393cdeb7943SYoshihiro Shimoda {
1394cdeb7943SYoshihiro Shimoda struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
1395cdeb7943SYoshihiro Shimoda struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
1396cdeb7943SYoshihiro Shimoda
1397cdeb7943SYoshihiro Shimoda /* clear DCP FIFO of transmission */
1398cdeb7943SYoshihiro Shimoda if (usbhsf_fifo_select(pipe, fifo, 1) < 0)
1399cdeb7943SYoshihiro Shimoda return;
1400cdeb7943SYoshihiro Shimoda usbhsf_fifo_clear(pipe, fifo);
1401cdeb7943SYoshihiro Shimoda usbhsf_fifo_unselect(pipe, fifo);
1402cdeb7943SYoshihiro Shimoda
1403cdeb7943SYoshihiro Shimoda /* clear DCP FIFO of reception */
1404cdeb7943SYoshihiro Shimoda if (usbhsf_fifo_select(pipe, fifo, 0) < 0)
1405cdeb7943SYoshihiro Shimoda return;
1406cdeb7943SYoshihiro Shimoda usbhsf_fifo_clear(pipe, fifo);
1407cdeb7943SYoshihiro Shimoda usbhsf_fifo_unselect(pipe, fifo);
1408cdeb7943SYoshihiro Shimoda }
1409cdeb7943SYoshihiro Shimoda
1410dad67397SKuninori Morimoto /*
1411dad67397SKuninori Morimoto * fifo init
1412dad67397SKuninori Morimoto */
usbhs_fifo_init(struct usbhs_priv * priv)1413dad67397SKuninori Morimoto void usbhs_fifo_init(struct usbhs_priv *priv)
1414dad67397SKuninori Morimoto {
1415dad67397SKuninori Morimoto struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1416d77e3f4eSKuninori Morimoto struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv);
14173a2634a5SYoshihiro Shimoda struct usbhs_fifo *dfifo;
14183a2634a5SYoshihiro Shimoda int i;
1419dad67397SKuninori Morimoto
1420dad67397SKuninori Morimoto mod->irq_empty = usbhsf_irq_empty;
1421dad67397SKuninori Morimoto mod->irq_ready = usbhsf_irq_ready;
1422dad67397SKuninori Morimoto mod->irq_bempsts = 0;
1423dad67397SKuninori Morimoto mod->irq_brdysts = 0;
1424d77e3f4eSKuninori Morimoto
1425d77e3f4eSKuninori Morimoto cfifo->pipe = NULL;
14263a2634a5SYoshihiro Shimoda usbhs_for_each_dfifo(priv, dfifo, i)
14273a2634a5SYoshihiro Shimoda dfifo->pipe = NULL;
1428dad67397SKuninori Morimoto }
1429dad67397SKuninori Morimoto
usbhs_fifo_quit(struct usbhs_priv * priv)1430dad67397SKuninori Morimoto void usbhs_fifo_quit(struct usbhs_priv *priv)
1431dad67397SKuninori Morimoto {
1432dad67397SKuninori Morimoto struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1433dad67397SKuninori Morimoto
1434dad67397SKuninori Morimoto mod->irq_empty = NULL;
1435dad67397SKuninori Morimoto mod->irq_ready = NULL;
1436dad67397SKuninori Morimoto mod->irq_bempsts = 0;
1437dad67397SKuninori Morimoto mod->irq_brdysts = 0;
1438dad67397SKuninori Morimoto }
1439d3af90a5SKuninori Morimoto
144053e734b1SYoshihiro Shimoda #define __USBHS_DFIFO_INIT(priv, fifo, channel, fifo_port) \
14413a2634a5SYoshihiro Shimoda do { \
14423a2634a5SYoshihiro Shimoda fifo = usbhsf_get_dnfifo(priv, channel); \
14433a2634a5SYoshihiro Shimoda fifo->name = "D"#channel"FIFO"; \
144453e734b1SYoshihiro Shimoda fifo->port = fifo_port; \
14453a2634a5SYoshihiro Shimoda fifo->sel = D##channel##FIFOSEL; \
14463a2634a5SYoshihiro Shimoda fifo->ctr = D##channel##FIFOCTR; \
14473a2634a5SYoshihiro Shimoda fifo->tx_slave.shdma_slave.slave_id = \
14483a2634a5SYoshihiro Shimoda usbhs_get_dparam(priv, d##channel##_tx_id); \
14493a2634a5SYoshihiro Shimoda fifo->rx_slave.shdma_slave.slave_id = \
14503a2634a5SYoshihiro Shimoda usbhs_get_dparam(priv, d##channel##_rx_id); \
14517a96b784SYoshihiro Shimoda usbhsf_dma_init(priv, fifo, channel); \
14523a2634a5SYoshihiro Shimoda } while (0)
14533a2634a5SYoshihiro Shimoda
145453e734b1SYoshihiro Shimoda #define USBHS_DFIFO_INIT(priv, fifo, channel) \
145553e734b1SYoshihiro Shimoda __USBHS_DFIFO_INIT(priv, fifo, channel, D##channel##FIFO)
145653e734b1SYoshihiro Shimoda #define USBHS_DFIFO_INIT_NO_PORT(priv, fifo, channel) \
145753e734b1SYoshihiro Shimoda __USBHS_DFIFO_INIT(priv, fifo, channel, 0)
145853e734b1SYoshihiro Shimoda
usbhs_fifo_probe(struct usbhs_priv * priv)1459d3af90a5SKuninori Morimoto int usbhs_fifo_probe(struct usbhs_priv *priv)
1460d3af90a5SKuninori Morimoto {
1461d3af90a5SKuninori Morimoto struct usbhs_fifo *fifo;
1462d3af90a5SKuninori Morimoto
1463d3af90a5SKuninori Morimoto /* CFIFO */
1464d3af90a5SKuninori Morimoto fifo = usbhsf_get_cfifo(priv);
1465e73a9891SKuninori Morimoto fifo->name = "CFIFO";
1466d3af90a5SKuninori Morimoto fifo->port = CFIFO;
1467d3af90a5SKuninori Morimoto fifo->sel = CFIFOSEL;
1468d3af90a5SKuninori Morimoto fifo->ctr = CFIFOCTR;
1469d3af90a5SKuninori Morimoto
14703a2634a5SYoshihiro Shimoda /* DFIFO */
14713a2634a5SYoshihiro Shimoda USBHS_DFIFO_INIT(priv, fifo, 0);
14723a2634a5SYoshihiro Shimoda USBHS_DFIFO_INIT(priv, fifo, 1);
1473d3cf6a4bSYoshihiro Shimoda USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 2);
1474d3cf6a4bSYoshihiro Shimoda USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 3);
1475e73a9891SKuninori Morimoto
1476d3af90a5SKuninori Morimoto return 0;
1477d3af90a5SKuninori Morimoto }
1478d3af90a5SKuninori Morimoto
usbhs_fifo_remove(struct usbhs_priv * priv)1479d3af90a5SKuninori Morimoto void usbhs_fifo_remove(struct usbhs_priv *priv)
1480d3af90a5SKuninori Morimoto {
14813a2634a5SYoshihiro Shimoda struct usbhs_fifo *fifo;
14823a2634a5SYoshihiro Shimoda int i;
14833a2634a5SYoshihiro Shimoda
14843a2634a5SYoshihiro Shimoda usbhs_for_each_dfifo(priv, fifo, i)
14853a2634a5SYoshihiro Shimoda usbhsf_dma_quit(priv, fifo);
1486d3af90a5SKuninori Morimoto }
1487