Lines Matching +full:double +full:- +full:buffering
1 // SPDX-License-Identifier: GPL-2.0
6 * Copyright (C) 2005-2006 by Texas Instruments
7 * Copyright (C) 2006-2007 Nokia Corporation
18 #include <linux/dma-mapping.h>
25 /* ----------------------------------------------------------------------- */
28 (req->map_state != UN_MAPPED))
36 struct dma_controller *dma = musb->dma_controller; in map_dma_buffer()
38 request->map_state = UN_MAPPED; in map_dma_buffer()
40 if (!is_dma_capable() || !musb_ep->dma) in map_dma_buffer()
47 if (dma->is_compatible) in map_dma_buffer()
48 compatible = dma->is_compatible(musb_ep->dma, in map_dma_buffer()
49 musb_ep->packet_sz, request->request.buf, in map_dma_buffer()
50 request->request.length); in map_dma_buffer()
54 if (request->request.dma == DMA_ADDR_INVALID) { in map_dma_buffer()
59 musb->controller, in map_dma_buffer()
60 request->request.buf, in map_dma_buffer()
61 request->request.length, in map_dma_buffer()
62 request->tx in map_dma_buffer()
65 ret = dma_mapping_error(musb->controller, dma_addr); in map_dma_buffer()
69 request->request.dma = dma_addr; in map_dma_buffer()
70 request->map_state = MUSB_MAPPED; in map_dma_buffer()
72 dma_sync_single_for_device(musb->controller, in map_dma_buffer()
73 request->request.dma, in map_dma_buffer()
74 request->request.length, in map_dma_buffer()
75 request->tx in map_dma_buffer()
78 request->map_state = PRE_MAPPED; in map_dma_buffer()
86 struct musb_ep *musb_ep = request->ep; in unmap_dma_buffer()
88 if (!is_buffer_mapped(request) || !musb_ep->dma) in unmap_dma_buffer()
91 if (request->request.dma == DMA_ADDR_INVALID) { in unmap_dma_buffer()
92 dev_vdbg(musb->controller, in unmap_dma_buffer()
96 if (request->map_state == MUSB_MAPPED) { in unmap_dma_buffer()
97 dma_unmap_single(musb->controller, in unmap_dma_buffer()
98 request->request.dma, in unmap_dma_buffer()
99 request->request.length, in unmap_dma_buffer()
100 request->tx in unmap_dma_buffer()
103 request->request.dma = DMA_ADDR_INVALID; in unmap_dma_buffer()
105 dma_sync_single_for_cpu(musb->controller, in unmap_dma_buffer()
106 request->request.dma, in unmap_dma_buffer()
107 request->request.length, in unmap_dma_buffer()
108 request->tx in unmap_dma_buffer()
112 request->map_state = UN_MAPPED; in unmap_dma_buffer()
126 __releases(ep->musb->lock) in musb_g_giveback()
127 __acquires(ep->musb->lock) in musb_g_giveback()
131 int busy = ep->busy; in musb_g_giveback()
135 list_del(&req->list); in musb_g_giveback()
136 if (req->request.status == -EINPROGRESS) in musb_g_giveback()
137 req->request.status = status; in musb_g_giveback()
138 musb = req->musb; in musb_g_giveback()
140 ep->busy = 1; in musb_g_giveback()
141 spin_unlock(&musb->lock); in musb_g_giveback()
143 if (!dma_mapping_error(&musb->g.dev, request->dma)) in musb_g_giveback()
147 usb_gadget_giveback_request(&req->ep->end_point, &req->request); in musb_g_giveback()
148 spin_lock(&musb->lock); in musb_g_giveback()
149 ep->busy = busy; in musb_g_giveback()
152 /* ----------------------------------------------------------------------- */
160 struct musb *musb = ep->musb; in nuke()
162 void __iomem *epio = ep->musb->endpoints[ep->current_epnum].regs; in nuke()
164 ep->busy = 1; in nuke()
166 if (is_dma_capable() && ep->dma) { in nuke()
167 struct dma_controller *c = ep->musb->dma_controller; in nuke()
170 if (ep->is_in) { in nuke()
187 value = c->channel_abort(ep->dma); in nuke()
188 musb_dbg(musb, "%s: abort DMA --> %d", ep->name, value); in nuke()
189 c->channel_release(ep->dma); in nuke()
190 ep->dma = NULL; in nuke()
193 while (!list_empty(&ep->req_list)) { in nuke()
194 req = list_first_entry(&ep->req_list, struct musb_request, list); in nuke()
195 musb_g_giveback(ep, &req->request, status); in nuke()
199 /* ----------------------------------------------------------------------- */
201 /* Data transfers - pure PIO, pure DMA, or mixed mode */
210 if (can_bulk_split(musb, ep->type)) in max_ep_writesize()
211 return ep->hw_ep->max_packet_sz_tx; in max_ep_writesize()
213 return ep->packet_sz; in max_ep_writesize()
225 u8 epnum = req->epnum; in txstate()
227 void __iomem *epio = musb->endpoints[epnum].regs; in txstate()
232 musb_ep = req->ep; in txstate()
235 if (!musb_ep->desc) { in txstate()
236 musb_dbg(musb, "ep:%s disabled - ignore request", in txstate()
237 musb_ep->end_point.name); in txstate()
242 if (dma_channel_status(musb_ep->dma) == MUSB_DMA_STATUS_BUSY) { in txstate()
250 request = &req->request; in txstate()
252 (int)(request->length - request->actual)); in txstate()
256 musb_ep->end_point.name, csr); in txstate()
262 musb_ep->end_point.name, csr); in txstate()
267 epnum, musb_ep->packet_sz, fifo_count, in txstate()
272 struct dma_controller *c = musb->dma_controller; in txstate()
276 request_size = min_t(size_t, request->length - request->actual, in txstate()
277 musb_ep->dma->max_len); in txstate()
279 use_dma = (request->dma != DMA_ADDR_INVALID && request_size); in txstate()
284 if (request_size < musb_ep->packet_sz) in txstate()
285 musb_ep->dma->desired_mode = 0; in txstate()
287 musb_ep->dma->desired_mode = 1; in txstate()
289 use_dma = use_dma && c->channel_program( in txstate()
290 musb_ep->dma, musb_ep->packet_sz, in txstate()
291 musb_ep->dma->desired_mode, in txstate()
292 request->dma + request->actual, request_size); in txstate()
294 if (musb_ep->dma->desired_mode == 0) { in txstate()
297 * before the DMAENAB bit -- and the in txstate()
322 if (!musb_ep->hb_mult || in txstate()
324 musb_ep->type)) in txstate()
355 * last-packet-is-already-short case. in txstate()
357 use_dma = use_dma && c->channel_program( in txstate()
358 musb_ep->dma, musb_ep->packet_sz, in txstate()
360 request->dma + request->actual, in txstate()
363 c->channel_release(musb_ep->dma); in txstate()
364 musb_ep->dma = NULL; in txstate()
367 /* invariant: prequest->buf is non-null */ in txstate()
370 use_dma = use_dma && c->channel_program( in txstate()
371 musb_ep->dma, musb_ep->packet_sz, in txstate()
372 request->zero, in txstate()
373 request->dma + request->actual, in txstate()
385 musb_write_fifo(musb_ep->hw_ep, fifo_count, in txstate()
386 (u8 *) (request->buf + request->actual)); in txstate()
387 request->actual += fifo_count; in txstate()
395 musb_ep->end_point.name, use_dma ? "dma" : "pio", in txstate()
396 request->actual, request->length, in txstate()
411 u8 __iomem *mbase = musb->mregs; in musb_g_tx()
412 struct musb_ep *musb_ep = &musb->endpoints[epnum].ep_in; in musb_g_tx()
413 void __iomem *epio = musb->endpoints[epnum].regs; in musb_g_tx()
418 request = &req->request; in musb_g_tx()
421 musb_dbg(musb, "<== %s, txcsr %04x", musb_ep->end_point.name, csr); in musb_g_tx()
423 dma = is_dma_capable() ? musb_ep->dma : NULL; in musb_g_tx()
441 dev_vdbg(musb->controller, "underrun on ep%d, req %p\n", in musb_g_tx()
450 musb_dbg(musb, "%s dma still busy?", musb_ep->end_point.name); in musb_g_tx()
465 request->actual += musb_ep->dma->actual_len; in musb_g_tx()
467 epnum, csr, musb_ep->dma->actual_len, request); in musb_g_tx()
474 if ((request->zero && request->length) in musb_g_tx()
475 && (request->length % musb_ep->packet_sz == 0) in musb_g_tx()
476 && (request->actual == request->length)) { in musb_g_tx()
487 request->zero = 0; in musb_g_tx()
490 if (request->actual == request->length) { in musb_g_tx()
501 req = musb_ep->desc ? next_request(musb_ep) : NULL; in musb_g_tx()
504 musb_ep->end_point.name); in musb_g_tx()
513 /* ------------------------------------------------------------ */
520 const u8 epnum = req->epnum; in rxstate()
521 struct usb_request *request = &req->request; in rxstate()
523 void __iomem *epio = musb->endpoints[epnum].regs; in rxstate()
527 struct musb_hw_ep *hw_ep = &musb->endpoints[epnum]; in rxstate()
530 if (hw_ep->is_shared_fifo) in rxstate()
531 musb_ep = &hw_ep->ep_in; in rxstate()
533 musb_ep = &hw_ep->ep_out; in rxstate()
535 fifo_count = musb_ep->packet_sz; in rxstate()
538 if (!musb_ep->desc) { in rxstate()
539 musb_dbg(musb, "ep:%s disabled - ignore request", in rxstate()
540 musb_ep->end_point.name); in rxstate()
545 if (dma_channel_status(musb_ep->dma) == MUSB_DMA_STATUS_BUSY) { in rxstate()
552 musb_ep->end_point.name, csr); in rxstate()
557 struct dma_controller *c = musb->dma_controller; in rxstate()
558 struct dma_channel *channel = musb_ep->dma; in rxstate()
562 * always going to run as IRQ-per-packet DMA so that in rxstate()
565 if (c->channel_program(channel, in rxstate()
566 musb_ep->packet_sz, in rxstate()
567 !request->short_not_ok, in rxstate()
568 request->dma + request->actual, in rxstate()
569 request->length - request->actual)) { in rxstate()
592 if (request->short_not_ok && fifo_count == musb_ep->packet_sz) in rxstate()
597 if (request->actual < request->length) { in rxstate()
607 c = musb->dma_controller; in rxstate()
608 channel = musb_ep->dma; in rxstate()
615 * in advance. For mass storage class, request->length = what the host in rxstate()
617 * request->length is routinely more than what the host sends. For in rxstate()
627 * REVISIT an updated g_file_storage can set req->short_not_ok, which in rxstate()
648 request->length - in rxstate()
649 request->actual, in rxstate()
650 channel->max_len); in rxstate()
651 musb_ep->dma->desired_mode = 1; in rxstate()
653 if (!musb_ep->hb_mult && in rxstate()
654 musb_ep->hw_ep->rx_double_buffered) in rxstate()
659 transfer_size = min(request->length - request->actual, in rxstate()
661 musb_ep->dma->desired_mode = 0; in rxstate()
664 use_dma = c->channel_program( in rxstate()
666 musb_ep->packet_sz, in rxstate()
667 channel->desired_mode, in rxstate()
668 request->dma in rxstate()
669 + request->actual, in rxstate()
677 (request->actual < request->length)) { in rxstate()
683 c = musb->dma_controller; in rxstate()
684 channel = musb_ep->dma; in rxstate()
687 if (fifo_count < musb_ep->packet_sz) in rxstate()
689 else if (request->short_not_ok) in rxstate()
691 request->length - in rxstate()
692 request->actual, in rxstate()
693 channel->max_len); in rxstate()
696 request->length - in rxstate()
697 request->actual, in rxstate()
706 if (transfer_size <= musb_ep->packet_sz) { in rxstate()
707 musb_ep->dma->desired_mode = 0; in rxstate()
709 musb_ep->dma->desired_mode = 1; in rxstate()
715 if (c->channel_program(channel, in rxstate()
716 musb_ep->packet_sz, in rxstate()
717 channel->desired_mode, in rxstate()
718 request->dma in rxstate()
719 + request->actual, in rxstate()
725 len = request->length - request->actual; in rxstate()
727 musb_ep->end_point.name, in rxstate()
729 musb_ep->packet_sz); in rxstate()
734 struct dma_controller *c = musb->dma_controller; in rxstate()
735 struct dma_channel *channel = musb_ep->dma; in rxstate()
736 u32 dma_addr = request->dma + request->actual; in rxstate()
739 ret = c->channel_program(channel, in rxstate()
740 musb_ep->packet_sz, in rxstate()
741 channel->desired_mode, in rxstate()
764 request->length - request->actual, in rxstate()
766 musb_read_fifo(musb_ep->hw_ep, fifo_count, (u8 *) in rxstate()
767 (request->buf + request->actual)); in rxstate()
768 request->actual += fifo_count; in rxstate()
771 * it and report -EOVERFLOW in rxstate()
782 if (request->actual == request->length || in rxstate()
783 fifo_count < musb_ep->packet_sz) in rxstate()
795 void __iomem *mbase = musb->mregs; in musb_g_rx()
797 void __iomem *epio = musb->endpoints[epnum].regs; in musb_g_rx()
799 struct musb_hw_ep *hw_ep = &musb->endpoints[epnum]; in musb_g_rx()
801 if (hw_ep->is_shared_fifo) in musb_g_rx()
802 musb_ep = &hw_ep->ep_in; in musb_g_rx()
804 musb_ep = &hw_ep->ep_out; in musb_g_rx()
813 request = &req->request; in musb_g_rx()
816 dma = is_dma_capable() ? musb_ep->dma : NULL; in musb_g_rx()
818 musb_dbg(musb, "<== %s, rxcsr %04x%s %p", musb_ep->end_point.name, in musb_g_rx()
833 musb_dbg(musb, "%s iso overrun on %p", musb_ep->name, request); in musb_g_rx()
834 if (request->status == -EINPROGRESS) in musb_g_rx()
835 request->status = -EOVERFLOW; in musb_g_rx()
839 musb_dbg(musb, "%s, incomprx", musb_ep->end_point.name); in musb_g_rx()
845 musb_ep->end_point.name, csr); in musb_g_rx()
856 request->actual += musb_ep->dma->actual_len; in musb_g_rx()
861 if ((dma->desired_mode == 0 && !hw_ep->rx_double_buffered) in musb_g_rx()
862 || (dma->actual_len in musb_g_rx()
863 & (musb_ep->packet_sz - 1))) { in musb_g_rx()
870 if ((request->actual < request->length) in musb_g_rx()
871 && (musb_ep->dma->actual_len in musb_g_rx()
872 == musb_ep->packet_sz)) { in musb_g_rx()
873 /* In double buffer case, continue to unload fifo if in musb_g_rx()
878 hw_ep->rx_double_buffered) in musb_g_rx()
906 /* ------------------------------------------------------------ */
920 int status = -EINVAL; in musb_gadget_enable()
923 return -EINVAL; in musb_gadget_enable()
926 hw_ep = musb_ep->hw_ep; in musb_gadget_enable()
927 regs = hw_ep->regs; in musb_gadget_enable()
928 musb = musb_ep->musb; in musb_gadget_enable()
929 mbase = musb->mregs; in musb_gadget_enable()
930 epnum = musb_ep->current_epnum; in musb_gadget_enable()
932 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_enable()
934 if (musb_ep->desc) { in musb_gadget_enable()
935 status = -EBUSY; in musb_gadget_enable()
938 musb_ep->type = usb_endpoint_type(desc); in musb_gadget_enable()
945 tmp = usb_endpoint_maxp_mult(desc) - 1; in musb_gadget_enable()
950 ok = musb->hb_iso_tx; in musb_gadget_enable()
952 ok = musb->hb_iso_rx; in musb_gadget_enable()
958 musb_ep->hb_mult = tmp; in musb_gadget_enable()
960 musb_ep->hb_mult = 0; in musb_gadget_enable()
963 musb_ep->packet_sz = usb_endpoint_maxp(desc); in musb_gadget_enable()
964 tmp = musb_ep->packet_sz * (musb_ep->hb_mult + 1); in musb_gadget_enable()
972 if (hw_ep->is_shared_fifo) in musb_gadget_enable()
973 musb_ep->is_in = 1; in musb_gadget_enable()
974 if (!musb_ep->is_in) in musb_gadget_enable()
977 if (tmp > hw_ep->max_packet_sz_tx) { in musb_gadget_enable()
982 musb->intrtxe |= (1 << epnum); in musb_gadget_enable()
983 musb_writew(mbase, MUSB_INTRTXE, musb->intrtxe); in musb_gadget_enable()
989 * to disable double buffering mode. in musb_gadget_enable()
991 if (can_bulk_split(musb, musb_ep->type)) in musb_gadget_enable()
992 musb_ep->hb_mult = (hw_ep->max_packet_sz_tx / in musb_gadget_enable()
993 musb_ep->packet_sz) - 1; in musb_gadget_enable()
994 musb_writew(regs, MUSB_TXMAXP, musb_ep->packet_sz in musb_gadget_enable()
995 | (musb_ep->hb_mult << 11)); in musb_gadget_enable()
1001 if (musb_ep->type == USB_ENDPOINT_XFER_ISOC) in musb_gadget_enable()
1004 /* set twice in case of double buffering */ in musb_gadget_enable()
1011 if (hw_ep->is_shared_fifo) in musb_gadget_enable()
1012 musb_ep->is_in = 0; in musb_gadget_enable()
1013 if (musb_ep->is_in) in musb_gadget_enable()
1016 if (tmp > hw_ep->max_packet_sz_rx) { in musb_gadget_enable()
1021 musb->intrrxe |= (1 << epnum); in musb_gadget_enable()
1022 musb_writew(mbase, MUSB_INTRRXE, musb->intrrxe); in musb_gadget_enable()
1028 * to disable double buffering mode. in musb_gadget_enable()
1030 musb_writew(regs, MUSB_RXMAXP, musb_ep->packet_sz in musb_gadget_enable()
1031 | (musb_ep->hb_mult << 11)); in musb_gadget_enable()
1033 /* force shared fifo to OUT-only mode */ in musb_gadget_enable()
1034 if (hw_ep->is_shared_fifo) { in musb_gadget_enable()
1041 if (musb_ep->type == USB_ENDPOINT_XFER_ISOC) in musb_gadget_enable()
1043 else if (musb_ep->type == USB_ENDPOINT_XFER_INT) in musb_gadget_enable()
1046 /* set twice in case of double buffering */ in musb_gadget_enable()
1054 if (is_dma_capable() && musb->dma_controller) { in musb_gadget_enable()
1055 struct dma_controller *c = musb->dma_controller; in musb_gadget_enable()
1057 musb_ep->dma = c->channel_alloc(c, hw_ep, in musb_gadget_enable()
1058 (desc->bEndpointAddress & USB_DIR_IN)); in musb_gadget_enable()
1060 musb_ep->dma = NULL; in musb_gadget_enable()
1062 musb_ep->desc = desc; in musb_gadget_enable()
1063 musb_ep->busy = 0; in musb_gadget_enable()
1064 musb_ep->wedged = 0; in musb_gadget_enable()
1068 musb_driver_name, musb_ep->end_point.name, in musb_gadget_enable()
1069 musb_ep_xfertype_string(musb_ep->type), in musb_gadget_enable()
1070 musb_ep->is_in ? "IN" : "OUT", in musb_gadget_enable()
1071 musb_ep->dma ? "dma, " : "", in musb_gadget_enable()
1072 musb_ep->packet_sz); in musb_gadget_enable()
1074 schedule_delayed_work(&musb->irq_work, 0); in musb_gadget_enable()
1077 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_enable()
1093 musb = musb_ep->musb; in musb_gadget_disable()
1094 epnum = musb_ep->current_epnum; in musb_gadget_disable()
1095 epio = musb->endpoints[epnum].regs; in musb_gadget_disable()
1097 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_disable()
1098 musb_ep_select(musb->mregs, epnum); in musb_gadget_disable()
1101 if (musb_ep->is_in) { in musb_gadget_disable()
1102 musb->intrtxe &= ~(1 << epnum); in musb_gadget_disable()
1103 musb_writew(musb->mregs, MUSB_INTRTXE, musb->intrtxe); in musb_gadget_disable()
1106 musb->intrrxe &= ~(1 << epnum); in musb_gadget_disable()
1107 musb_writew(musb->mregs, MUSB_INTRRXE, musb->intrrxe); in musb_gadget_disable()
1112 nuke(musb_ep, -ESHUTDOWN); in musb_gadget_disable()
1114 musb_ep->desc = NULL; in musb_gadget_disable()
1115 musb_ep->end_point.desc = NULL; in musb_gadget_disable()
1117 schedule_delayed_work(&musb->irq_work, 0); in musb_gadget_disable()
1119 spin_unlock_irqrestore(&(musb->lock), flags); in musb_gadget_disable()
1121 musb_dbg(musb, "%s", musb_ep->end_point.name); in musb_gadget_disable()
1139 request->request.dma = DMA_ADDR_INVALID; in musb_alloc_request()
1140 request->epnum = musb_ep->current_epnum; in musb_alloc_request()
1141 request->ep = musb_ep; in musb_alloc_request()
1144 return &request->request; in musb_alloc_request()
1174 musb_ep_select(musb->mregs, req->epnum); in musb_ep_restart()
1175 if (req->tx) in musb_ep_restart()
1200 return -EINVAL; in musb_gadget_queue()
1201 if (!req->buf) in musb_gadget_queue()
1202 return -ENODATA; in musb_gadget_queue()
1205 musb = musb_ep->musb; in musb_gadget_queue()
1208 request->musb = musb; in musb_gadget_queue()
1210 if (request->ep != musb_ep) in musb_gadget_queue()
1211 return -EINVAL; in musb_gadget_queue()
1213 status = pm_runtime_get(musb->controller); in musb_gadget_queue()
1214 if ((status != -EINPROGRESS) && status < 0) { in musb_gadget_queue()
1215 dev_err(musb->controller, in musb_gadget_queue()
1218 pm_runtime_put_noidle(musb->controller); in musb_gadget_queue()
1227 request->request.actual = 0; in musb_gadget_queue()
1228 request->request.status = -EINPROGRESS; in musb_gadget_queue()
1229 request->epnum = musb_ep->current_epnum; in musb_gadget_queue()
1230 request->tx = musb_ep->is_in; in musb_gadget_queue()
1234 spin_lock_irqsave(&musb->lock, lockflags); in musb_gadget_queue()
1237 if (!musb_ep->desc) { in musb_gadget_queue()
1239 req, ep->name, "disabled"); in musb_gadget_queue()
1240 status = -ESHUTDOWN; in musb_gadget_queue()
1246 list_add_tail(&request->list, &musb_ep->req_list); in musb_gadget_queue()
1249 if (!musb_ep->busy && &request->list == musb_ep->req_list.next) { in musb_gadget_queue()
1254 dev_err(musb->controller, "%s resume work: %i\n", in musb_gadget_queue()
1256 list_del(&request->list); in musb_gadget_queue()
1261 spin_unlock_irqrestore(&musb->lock, lockflags); in musb_gadget_queue()
1262 pm_runtime_mark_last_busy(musb->controller); in musb_gadget_queue()
1263 pm_runtime_put_autosuspend(musb->controller); in musb_gadget_queue()
1275 struct musb *musb = musb_ep->musb; in musb_gadget_dequeue()
1277 if (!ep || !request || req->ep != musb_ep) in musb_gadget_dequeue()
1278 return -EINVAL; in musb_gadget_dequeue()
1282 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_dequeue()
1284 list_for_each_entry(r, &musb_ep->req_list, list) { in musb_gadget_dequeue()
1289 dev_err(musb->controller, "request %p not queued to %s\n", in musb_gadget_dequeue()
1290 request, ep->name); in musb_gadget_dequeue()
1291 status = -EINVAL; in musb_gadget_dequeue()
1296 if (musb_ep->req_list.next != &req->list || musb_ep->busy) in musb_gadget_dequeue()
1297 musb_g_giveback(musb_ep, request, -ECONNRESET); in musb_gadget_dequeue()
1300 else if (is_dma_capable() && musb_ep->dma) { in musb_gadget_dequeue()
1301 struct dma_controller *c = musb->dma_controller; in musb_gadget_dequeue()
1303 musb_ep_select(musb->mregs, musb_ep->current_epnum); in musb_gadget_dequeue()
1304 if (c->channel_abort) in musb_gadget_dequeue()
1305 status = c->channel_abort(musb_ep->dma); in musb_gadget_dequeue()
1307 status = -EBUSY; in musb_gadget_dequeue()
1309 musb_g_giveback(musb_ep, request, -ECONNRESET); in musb_gadget_dequeue()
1312 * we leave counting of in-flight packets imprecise. in musb_gadget_dequeue()
1314 musb_g_giveback(musb_ep, request, -ECONNRESET); in musb_gadget_dequeue()
1318 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_dequeue()
1331 u8 epnum = musb_ep->current_epnum; in musb_gadget_set_halt()
1332 struct musb *musb = musb_ep->musb; in musb_gadget_set_halt()
1333 void __iomem *epio = musb->endpoints[epnum].regs; in musb_gadget_set_halt()
1341 return -EINVAL; in musb_gadget_set_halt()
1342 mbase = musb->mregs; in musb_gadget_set_halt()
1344 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_set_halt()
1346 if ((USB_ENDPOINT_XFER_ISOC == musb_ep->type)) { in musb_gadget_set_halt()
1347 status = -EINVAL; in musb_gadget_set_halt()
1357 ep->name); in musb_gadget_set_halt()
1358 status = -EAGAIN; in musb_gadget_set_halt()
1361 /* Cannot portably stall with non-empty FIFO */ in musb_gadget_set_halt()
1362 if (musb_ep->is_in) { in musb_gadget_set_halt()
1366 ep->name); in musb_gadget_set_halt()
1367 status = -EAGAIN; in musb_gadget_set_halt()
1372 musb_ep->wedged = 0; in musb_gadget_set_halt()
1375 musb_dbg(musb, "%s: %s stall", ep->name, value ? "set" : "clear"); in musb_gadget_set_halt()
1376 if (musb_ep->is_in) { in musb_gadget_set_halt()
1401 if (!musb_ep->busy && !value && request) { in musb_gadget_set_halt()
1407 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_set_halt()
1419 return -EINVAL; in musb_gadget_set_wedge()
1421 musb_ep->wedged = 1; in musb_gadget_set_wedge()
1429 void __iomem *epio = musb_ep->hw_ep->regs; in musb_gadget_fifo_status()
1430 int retval = -EINVAL; in musb_gadget_fifo_status()
1432 if (musb_ep->desc && !musb_ep->is_in) { in musb_gadget_fifo_status()
1433 struct musb *musb = musb_ep->musb; in musb_gadget_fifo_status()
1434 int epnum = musb_ep->current_epnum; in musb_gadget_fifo_status()
1435 void __iomem *mbase = musb->mregs; in musb_gadget_fifo_status()
1438 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_fifo_status()
1444 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_fifo_status()
1452 struct musb *musb = musb_ep->musb; in musb_gadget_fifo_flush()
1453 u8 epnum = musb_ep->current_epnum; in musb_gadget_fifo_flush()
1454 void __iomem *epio = musb->endpoints[epnum].regs; in musb_gadget_fifo_flush()
1459 mbase = musb->mregs; in musb_gadget_fifo_flush()
1461 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_fifo_flush()
1465 musb_writew(mbase, MUSB_INTRTXE, musb->intrtxe & ~(1 << epnum)); in musb_gadget_fifo_flush()
1467 if (musb_ep->is_in) { in musb_gadget_fifo_flush()
1488 /* re-enable interrupt */ in musb_gadget_fifo_flush()
1489 musb_writew(mbase, MUSB_INTRTXE, musb->intrtxe); in musb_gadget_fifo_flush()
1490 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_fifo_flush()
1506 /* ----------------------------------------------------------------------- */
1512 return (int)musb_readw(musb->mregs, MUSB_FRAME); in musb_gadget_get_frame()
1518 void __iomem *mregs = musb->mregs; in musb_gadget_wakeup()
1520 int status = -EINVAL; in musb_gadget_wakeup()
1524 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_wakeup()
1532 if (musb->may_wakeup && musb->is_suspended) in musb_gadget_wakeup()
1545 if (retries-- < 1) in musb_gadget_wakeup()
1551 if (retries-- < 1) in musb_gadget_wakeup()
1555 if (musb->xceiv) { in musb_gadget_wakeup()
1556 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_wakeup()
1557 otg_start_srp(musb->xceiv->otg); in musb_gadget_wakeup()
1558 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_wakeup()
1587 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_wakeup()
1594 gadget->is_selfpowered = !!is_selfpowered; in musb_gadget_set_self_powered()
1602 power = musb_readb(musb->mregs, MUSB_POWER); in musb_pullup()
1612 musb_writeb(musb->mregs, MUSB_POWER, power); in musb_pullup()
1625 return -EINVAL;
1633 return usb_phy_set_power(musb->xceiv, mA); in musb_gadget_vbus_draw()
1642 pm_runtime_get_sync(musb->controller); in musb_gadget_work()
1643 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_work()
1644 musb_pullup(musb, musb->softconnect); in musb_gadget_work()
1645 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_work()
1646 pm_runtime_mark_last_busy(musb->controller); in musb_gadget_work()
1647 pm_runtime_put_autosuspend(musb->controller); in musb_gadget_work()
1658 * not pullup unless the B-session is active. in musb_gadget_pullup()
1660 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_pullup()
1661 if (is_on != musb->softconnect) { in musb_gadget_pullup()
1662 musb->softconnect = is_on; in musb_gadget_pullup()
1663 schedule_delayed_work(&musb->gadget_work, 0); in musb_gadget_pullup()
1665 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_pullup()
1685 /* ----------------------------------------------------------------------- */
1697 struct musb_hw_ep *hw_ep = musb->endpoints + epnum; in init_peripheral_ep()
1701 ep->current_epnum = epnum; in init_peripheral_ep()
1702 ep->musb = musb; in init_peripheral_ep()
1703 ep->hw_ep = hw_ep; in init_peripheral_ep()
1704 ep->is_in = is_in; in init_peripheral_ep()
1706 INIT_LIST_HEAD(&ep->req_list); in init_peripheral_ep()
1708 sprintf(ep->name, "ep%d%s", epnum, in init_peripheral_ep()
1709 (!epnum || hw_ep->is_shared_fifo) ? "" : ( in init_peripheral_ep()
1711 ep->end_point.name = ep->name; in init_peripheral_ep()
1712 INIT_LIST_HEAD(&ep->end_point.ep_list); in init_peripheral_ep()
1714 usb_ep_set_maxpacket_limit(&ep->end_point, 64); in init_peripheral_ep()
1715 ep->end_point.caps.type_control = true; in init_peripheral_ep()
1716 ep->end_point.ops = &musb_g_ep0_ops; in init_peripheral_ep()
1717 musb->g.ep0 = &ep->end_point; in init_peripheral_ep()
1720 usb_ep_set_maxpacket_limit(&ep->end_point, hw_ep->max_packet_sz_tx); in init_peripheral_ep()
1722 usb_ep_set_maxpacket_limit(&ep->end_point, hw_ep->max_packet_sz_rx); in init_peripheral_ep()
1723 ep->end_point.caps.type_iso = true; in init_peripheral_ep()
1724 ep->end_point.caps.type_bulk = true; in init_peripheral_ep()
1725 ep->end_point.caps.type_int = true; in init_peripheral_ep()
1726 ep->end_point.ops = &musb_ep_ops; in init_peripheral_ep()
1727 list_add_tail(&ep->end_point.ep_list, &musb->g.ep_list); in init_peripheral_ep()
1730 if (!epnum || hw_ep->is_shared_fifo) { in init_peripheral_ep()
1731 ep->end_point.caps.dir_in = true; in init_peripheral_ep()
1732 ep->end_point.caps.dir_out = true; in init_peripheral_ep()
1734 ep->end_point.caps.dir_in = true; in init_peripheral_ep()
1736 ep->end_point.caps.dir_out = true; in init_peripheral_ep()
1750 INIT_LIST_HEAD(&(musb->g.ep_list)); in musb_g_init_endpoints()
1752 for (epnum = 0, hw_ep = musb->endpoints; in musb_g_init_endpoints()
1753 epnum < musb->nr_endpoints; in musb_g_init_endpoints()
1755 if (hw_ep->is_shared_fifo /* || !epnum */) { in musb_g_init_endpoints()
1756 init_peripheral_ep(musb, &hw_ep->ep_in, epnum, 0); in musb_g_init_endpoints()
1759 if (hw_ep->max_packet_sz_tx) { in musb_g_init_endpoints()
1760 init_peripheral_ep(musb, &hw_ep->ep_in, in musb_g_init_endpoints()
1764 if (hw_ep->max_packet_sz_rx) { in musb_g_init_endpoints()
1765 init_peripheral_ep(musb, &hw_ep->ep_out, in musb_g_init_endpoints()
1785 musb->g.ops = &musb_gadget_operations; in musb_gadget_setup()
1786 musb->g.max_speed = USB_SPEED_HIGH; in musb_gadget_setup()
1787 musb->g.speed = USB_SPEED_UNKNOWN; in musb_gadget_setup()
1793 musb->g.name = musb_driver_name; in musb_gadget_setup()
1795 musb->g.is_otg = 0; in musb_gadget_setup()
1796 INIT_DELAYED_WORK(&musb->gadget_work, musb_gadget_work); in musb_gadget_setup()
1799 musb->is_active = 0; in musb_gadget_setup()
1802 status = usb_add_gadget_udc(musb->controller, &musb->g); in musb_gadget_setup()
1808 musb->g.dev.parent = NULL; in musb_gadget_setup()
1809 device_unregister(&musb->g.dev); in musb_gadget_setup()
1815 if (musb->port_mode == MUSB_HOST) in musb_gadget_cleanup()
1818 cancel_delayed_work_sync(&musb->gadget_work); in musb_gadget_cleanup()
1819 usb_del_gadget_udc(&musb->g); in musb_gadget_cleanup()
1826 * -EINVAL something went wrong (not driver)
1827 * -EBUSY another gadget is already using the controller
1828 * -ENOMEM no memory to perform the operation
1840 if (driver->max_speed < USB_SPEED_HIGH) { in musb_gadget_start()
1841 retval = -EINVAL; in musb_gadget_start()
1845 pm_runtime_get_sync(musb->controller); in musb_gadget_start()
1847 musb->softconnect = 0; in musb_gadget_start()
1848 musb->gadget_driver = driver; in musb_gadget_start()
1850 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_start()
1851 musb->is_active = 1; in musb_gadget_start()
1853 if (musb->xceiv) in musb_gadget_start()
1854 otg_set_peripheral(musb->xceiv->otg, &musb->g); in musb_gadget_start()
1856 phy_set_mode(musb->phy, PHY_MODE_USB_DEVICE); in musb_gadget_start()
1859 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_start()
1867 if (musb->xceiv && musb->xceiv->last_event == USB_EVENT_ID) in musb_gadget_start()
1870 pm_runtime_mark_last_busy(musb->controller); in musb_gadget_start()
1871 pm_runtime_put_autosuspend(musb->controller); in musb_gadget_start()
1890 pm_runtime_get_sync(musb->controller); in musb_gadget_stop()
1897 spin_lock_irqsave(&musb->lock, flags); in musb_gadget_stop()
1901 (void) musb_gadget_vbus_draw(&musb->g, 0); in musb_gadget_stop()
1906 if (musb->xceiv) in musb_gadget_stop()
1907 otg_set_peripheral(musb->xceiv->otg, NULL); in musb_gadget_stop()
1909 phy_set_mode(musb->phy, PHY_MODE_INVALID); in musb_gadget_stop()
1911 musb->is_active = 0; in musb_gadget_stop()
1912 musb->gadget_driver = NULL; in musb_gadget_stop()
1914 spin_unlock_irqrestore(&musb->lock, flags); in musb_gadget_stop()
1923 pm_runtime_mark_last_busy(musb->controller); in musb_gadget_stop()
1924 pm_runtime_put_autosuspend(musb->controller); in musb_gadget_stop()
1929 /* ----------------------------------------------------------------------- */
1935 musb->is_suspended = 0; in musb_g_resume()
1941 musb->is_active = 1; in musb_g_resume()
1942 if (musb->gadget_driver && musb->gadget_driver->resume) { in musb_g_resume()
1943 spin_unlock(&musb->lock); in musb_g_resume()
1944 musb->gadget_driver->resume(&musb->g); in musb_g_resume()
1945 spin_lock(&musb->lock); in musb_g_resume()
1959 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); in musb_g_suspend()
1968 musb->is_suspended = 1; in musb_g_suspend()
1969 if (musb->gadget_driver && musb->gadget_driver->suspend) { in musb_g_suspend()
1970 spin_unlock(&musb->lock); in musb_g_suspend()
1971 musb->gadget_driver->suspend(&musb->g); in musb_g_suspend()
1972 spin_lock(&musb->lock); in musb_g_suspend()
1987 musb_gadget_wakeup(&musb->g); in musb_g_wakeup()
1993 void __iomem *mregs = musb->mregs; in musb_g_disconnect()
2001 /* don't draw vbus until new b-default session */ in musb_g_disconnect()
2002 (void) musb_gadget_vbus_draw(&musb->g, 0); in musb_g_disconnect()
2004 musb->g.speed = USB_SPEED_UNKNOWN; in musb_g_disconnect()
2005 if (musb->gadget_driver && musb->gadget_driver->disconnect) { in musb_g_disconnect()
2006 spin_unlock(&musb->lock); in musb_g_disconnect()
2007 musb->gadget_driver->disconnect(&musb->g); in musb_g_disconnect()
2008 spin_lock(&musb->lock); in musb_g_disconnect()
2032 musb->is_active = 0; in musb_g_disconnect()
2036 __releases(musb->lock) in musb_g_reset()
2037 __acquires(musb->lock) in musb_g_reset()
2039 void __iomem *mbase = musb->mregs; in musb_g_reset()
2045 ? "B-Device" : "A-Device", in musb_g_reset()
2046 musb->gadget_driver in musb_g_reset()
2047 ? musb->gadget_driver->driver.name in musb_g_reset()
2052 if (musb->gadget_driver && musb->g.speed != USB_SPEED_UNKNOWN) { in musb_g_reset()
2053 spin_unlock(&musb->lock); in musb_g_reset()
2054 usb_gadget_udc_reset(&musb->g, musb->gadget_driver); in musb_g_reset()
2055 spin_lock(&musb->lock); in musb_g_reset()
2065 musb->g.speed = (power & MUSB_POWER_HSMODE) in musb_g_reset()
2069 musb->is_active = 1; in musb_g_reset()
2070 musb->is_suspended = 0; in musb_g_reset()
2072 musb->address = 0; in musb_g_reset()
2073 musb->ep0_state = MUSB_EP0_STAGE_SETUP; in musb_g_reset()
2075 musb->may_wakeup = 0; in musb_g_reset()
2076 musb->g.b_hnp_enable = 0; in musb_g_reset()
2077 musb->g.a_alt_hnp_support = 0; in musb_g_reset()
2078 musb->g.a_hnp_support = 0; in musb_g_reset()
2079 musb->g.quirk_zlp_not_supp = 1; in musb_g_reset()
2081 /* Normal reset, as B-Device; in musb_g_reset()
2082 * or else after HNP, as A-Device in musb_g_reset()
2084 if (!musb->g.is_otg) { in musb_g_reset()
2091 musb->g.is_a_peripheral = 0; in musb_g_reset()
2094 musb->g.is_a_peripheral = 0; in musb_g_reset()
2097 musb->g.is_a_peripheral = 1; in musb_g_reset()
2101 (void) musb_gadget_vbus_draw(&musb->g, 8); in musb_g_reset()