2 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com
5 * Copyright 2008 Openmoko, Inc.
6 * Copyright 2008 Simtec Electronics
7 * Ben Dooks <ben@simtec.co.uk>
8 * http://armlinux.simtec.co.uk/
10 * S3C USB2.0 High-speed / OtG driver
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/spinlock.h>
20 #include <linux/interrupt.h>
21 #include <linux/platform_device.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/mutex.h>
24 #include <linux/seq_file.h>
25 #include <linux/delay.h>
27 #include <linux/slab.h>
28 #include <linux/clk.h>
29 #include <linux/regulator/consumer.h>
30 #include <linux/of_platform.h>
31 #include <linux/phy/phy.h>
33 #include <linux/usb/ch9.h>
34 #include <linux/usb/gadget.h>
35 #include <linux/usb/phy.h>
36 #include <linux/platform_data/s3c-hsotg.h>
41 /* conversion functions */
42 static inline struct dwc2_hsotg_req *our_req(struct usb_request *req)
44 return container_of(req, struct dwc2_hsotg_req, req);
47 static inline struct dwc2_hsotg_ep *our_ep(struct usb_ep *ep)
49 return container_of(ep, struct dwc2_hsotg_ep, ep);
52 static inline struct dwc2_hsotg *to_hsotg(struct usb_gadget *gadget)
54 return container_of(gadget, struct dwc2_hsotg, gadget);
57 static inline void __orr32(void __iomem *ptr, u32 val)
59 dwc2_writel(dwc2_readl(ptr) | val, ptr);
62 static inline void __bic32(void __iomem *ptr, u32 val)
64 dwc2_writel(dwc2_readl(ptr) & ~val, ptr);
67 static inline struct dwc2_hsotg_ep *index_to_ep(struct dwc2_hsotg *hsotg,
68 u32 ep_index, u32 dir_in)
71 return hsotg->eps_in[ep_index];
73 return hsotg->eps_out[ep_index];
76 /* forward declaration of functions */
77 static void dwc2_hsotg_dump(struct dwc2_hsotg *hsotg);
80 * using_dma - return the DMA status of the driver.
81 * @hsotg: The driver state.
83 * Return true if we're using DMA.
85 * Currently, we have the DMA support code worked into everywhere
86 * that needs it, but the AMBA DMA implementation in the hardware can
87 * only DMA from 32bit aligned addresses. This means that gadgets such
88 * as the CDC Ethernet cannot work as they often pass packets which are
91 * Unfortunately the choice to use DMA or not is global to the controller
92 * and seems to be only settable when the controller is being put through
93 * a core reset. This means we either need to fix the gadgets to take
94 * account of DMA alignment, or add bounce buffers (yuerk).
96 * g_using_dma is set depending on dts flag.
98 static inline bool using_dma(struct dwc2_hsotg *hsotg)
100 return hsotg->g_using_dma;
104 * dwc2_hsotg_en_gsint - enable one or more of the general interrupt
105 * @hsotg: The device state
106 * @ints: A bitmask of the interrupts to enable
108 static void dwc2_hsotg_en_gsint(struct dwc2_hsotg *hsotg, u32 ints)
110 u32 gsintmsk = dwc2_readl(hsotg->regs + GINTMSK);
113 new_gsintmsk = gsintmsk | ints;
115 if (new_gsintmsk != gsintmsk) {
116 dev_dbg(hsotg->dev, "gsintmsk now 0x%08x\n", new_gsintmsk);
117 dwc2_writel(new_gsintmsk, hsotg->regs + GINTMSK);
122 * dwc2_hsotg_disable_gsint - disable one or more of the general interrupt
123 * @hsotg: The device state
124 * @ints: A bitmask of the interrupts to enable
126 static void dwc2_hsotg_disable_gsint(struct dwc2_hsotg *hsotg, u32 ints)
128 u32 gsintmsk = dwc2_readl(hsotg->regs + GINTMSK);
131 new_gsintmsk = gsintmsk & ~ints;
133 if (new_gsintmsk != gsintmsk)
134 dwc2_writel(new_gsintmsk, hsotg->regs + GINTMSK);
138 * dwc2_hsotg_ctrl_epint - enable/disable an endpoint irq
139 * @hsotg: The device state
140 * @ep: The endpoint index
141 * @dir_in: True if direction is in.
142 * @en: The enable value, true to enable
144 * Set or clear the mask for an individual endpoint's interrupt
147 static void dwc2_hsotg_ctrl_epint(struct dwc2_hsotg *hsotg,
148 unsigned int ep, unsigned int dir_in,
158 local_irq_save(flags);
159 daint = dwc2_readl(hsotg->regs + DAINTMSK);
164 dwc2_writel(daint, hsotg->regs + DAINTMSK);
165 local_irq_restore(flags);
169 * dwc2_hsotg_init_fifo - initialise non-periodic FIFOs
170 * @hsotg: The device instance.
172 static void dwc2_hsotg_init_fifo(struct dwc2_hsotg *hsotg)
179 /* Reset fifo map if not correctly cleared during previous session */
180 WARN_ON(hsotg->fifo_map);
183 /* set RX/NPTX FIFO sizes */
184 dwc2_writel(hsotg->g_rx_fifo_sz, hsotg->regs + GRXFSIZ);
185 dwc2_writel((hsotg->g_rx_fifo_sz << FIFOSIZE_STARTADDR_SHIFT) |
186 (hsotg->g_np_g_tx_fifo_sz << FIFOSIZE_DEPTH_SHIFT),
187 hsotg->regs + GNPTXFSIZ);
190 * arange all the rest of the TX FIFOs, as some versions of this
191 * block have overlapping default addresses. This also ensures
192 * that if the settings have been changed, then they are set to
196 /* start at the end of the GNPTXFSIZ, rounded up */
197 addr = hsotg->g_rx_fifo_sz + hsotg->g_np_g_tx_fifo_sz;
200 * Configure fifos sizes from provided configuration and assign
201 * them to endpoints dynamically according to maxpacket size value of
204 for (ep = 1; ep < MAX_EPS_CHANNELS; ep++) {
205 if (!hsotg->g_tx_fifo_sz[ep])
208 val |= hsotg->g_tx_fifo_sz[ep] << FIFOSIZE_DEPTH_SHIFT;
209 WARN_ONCE(addr + hsotg->g_tx_fifo_sz[ep] > hsotg->fifo_mem,
210 "insufficient fifo memory");
211 addr += hsotg->g_tx_fifo_sz[ep];
213 dwc2_writel(val, hsotg->regs + DPTXFSIZN(ep));
217 * according to p428 of the design guide, we need to ensure that
218 * all fifos are flushed before continuing
221 dwc2_writel(GRSTCTL_TXFNUM(0x10) | GRSTCTL_TXFFLSH |
222 GRSTCTL_RXFFLSH, hsotg->regs + GRSTCTL);
224 /* wait until the fifos are both flushed */
227 val = dwc2_readl(hsotg->regs + GRSTCTL);
229 if ((val & (GRSTCTL_TXFFLSH | GRSTCTL_RXFFLSH)) == 0)
232 if (--timeout == 0) {
234 "%s: timeout flushing fifos (GRSTCTL=%08x)\n",
242 dev_dbg(hsotg->dev, "FIFOs reset, timeout at %d\n", timeout);
246 * @ep: USB endpoint to allocate request for.
247 * @flags: Allocation flags
249 * Allocate a new USB request structure appropriate for the specified endpoint
251 static struct usb_request *dwc2_hsotg_ep_alloc_request(struct usb_ep *ep,
254 struct dwc2_hsotg_req *req;
256 req = kzalloc(sizeof(struct dwc2_hsotg_req), flags);
260 INIT_LIST_HEAD(&req->queue);
266 * is_ep_periodic - return true if the endpoint is in periodic mode.
267 * @hs_ep: The endpoint to query.
269 * Returns true if the endpoint is in periodic mode, meaning it is being
270 * used for an Interrupt or ISO transfer.
272 static inline int is_ep_periodic(struct dwc2_hsotg_ep *hs_ep)
274 return hs_ep->periodic;
278 * dwc2_hsotg_unmap_dma - unmap the DMA memory being used for the request
279 * @hsotg: The device state.
280 * @hs_ep: The endpoint for the request
281 * @hs_req: The request being processed.
283 * This is the reverse of dwc2_hsotg_map_dma(), called for the completion
284 * of a request to ensure the buffer is ready for access by the caller.
286 static void dwc2_hsotg_unmap_dma(struct dwc2_hsotg *hsotg,
287 struct dwc2_hsotg_ep *hs_ep,
288 struct dwc2_hsotg_req *hs_req)
290 struct usb_request *req = &hs_req->req;
292 /* ignore this if we're not moving any data */
293 if (hs_req->req.length == 0)
296 usb_gadget_unmap_request(&hsotg->gadget, req, hs_ep->dir_in);
300 * dwc2_hsotg_write_fifo - write packet Data to the TxFIFO
301 * @hsotg: The controller state.
302 * @hs_ep: The endpoint we're going to write for.
303 * @hs_req: The request to write data for.
305 * This is called when the TxFIFO has some space in it to hold a new
306 * transmission and we have something to give it. The actual setup of
307 * the data size is done elsewhere, so all we have to do is to actually
310 * The return value is zero if there is more space (or nothing was done)
311 * otherwise -ENOSPC is returned if the FIFO space was used up.
313 * This routine is only needed for PIO
315 static int dwc2_hsotg_write_fifo(struct dwc2_hsotg *hsotg,
316 struct dwc2_hsotg_ep *hs_ep,
317 struct dwc2_hsotg_req *hs_req)
319 bool periodic = is_ep_periodic(hs_ep);
320 u32 gnptxsts = dwc2_readl(hsotg->regs + GNPTXSTS);
321 int buf_pos = hs_req->req.actual;
322 int to_write = hs_ep->size_loaded;
328 to_write -= (buf_pos - hs_ep->last_load);
330 /* if there's nothing to write, get out early */
334 if (periodic && !hsotg->dedicated_fifos) {
335 u32 epsize = dwc2_readl(hsotg->regs + DIEPTSIZ(hs_ep->index));
340 * work out how much data was loaded so we can calculate
341 * how much data is left in the fifo.
344 size_left = DXEPTSIZ_XFERSIZE_GET(epsize);
347 * if shared fifo, we cannot write anything until the
348 * previous data has been completely sent.
350 if (hs_ep->fifo_load != 0) {
351 dwc2_hsotg_en_gsint(hsotg, GINTSTS_PTXFEMP);
355 dev_dbg(hsotg->dev, "%s: left=%d, load=%d, fifo=%d, size %d\n",
357 hs_ep->size_loaded, hs_ep->fifo_load, hs_ep->fifo_size);
359 /* how much of the data has moved */
360 size_done = hs_ep->size_loaded - size_left;
362 /* how much data is left in the fifo */
363 can_write = hs_ep->fifo_load - size_done;
364 dev_dbg(hsotg->dev, "%s: => can_write1=%d\n",
365 __func__, can_write);
367 can_write = hs_ep->fifo_size - can_write;
368 dev_dbg(hsotg->dev, "%s: => can_write2=%d\n",
369 __func__, can_write);
371 if (can_write <= 0) {
372 dwc2_hsotg_en_gsint(hsotg, GINTSTS_PTXFEMP);
375 } else if (hsotg->dedicated_fifos && hs_ep->index != 0) {
376 can_write = dwc2_readl(hsotg->regs + DTXFSTS(hs_ep->index));
381 if (GNPTXSTS_NP_TXQ_SPC_AVAIL_GET(gnptxsts) == 0) {
383 "%s: no queue slots available (0x%08x)\n",
386 dwc2_hsotg_en_gsint(hsotg, GINTSTS_NPTXFEMP);
390 can_write = GNPTXSTS_NP_TXF_SPC_AVAIL_GET(gnptxsts);
391 can_write *= 4; /* fifo size is in 32bit quantities. */
394 max_transfer = hs_ep->ep.maxpacket * hs_ep->mc;
396 dev_dbg(hsotg->dev, "%s: GNPTXSTS=%08x, can=%d, to=%d, max_transfer %d\n",
397 __func__, gnptxsts, can_write, to_write, max_transfer);
400 * limit to 512 bytes of data, it seems at least on the non-periodic
401 * FIFO, requests of >512 cause the endpoint to get stuck with a
402 * fragment of the end of the transfer in it.
404 if (can_write > 512 && !periodic)
408 * limit the write to one max-packet size worth of data, but allow
409 * the transfer to return that it did not run out of fifo space
412 if (to_write > max_transfer) {
413 to_write = max_transfer;
415 /* it's needed only when we do not use dedicated fifos */
416 if (!hsotg->dedicated_fifos)
417 dwc2_hsotg_en_gsint(hsotg,
418 periodic ? GINTSTS_PTXFEMP :
422 /* see if we can write data */
424 if (to_write > can_write) {
425 to_write = can_write;
426 pkt_round = to_write % max_transfer;
429 * Round the write down to an
430 * exact number of packets.
432 * Note, we do not currently check to see if we can ever
433 * write a full packet or not to the FIFO.
437 to_write -= pkt_round;
440 * enable correct FIFO interrupt to alert us when there
444 /* it's needed only when we do not use dedicated fifos */
445 if (!hsotg->dedicated_fifos)
446 dwc2_hsotg_en_gsint(hsotg,
447 periodic ? GINTSTS_PTXFEMP :
451 dev_dbg(hsotg->dev, "write %d/%d, can_write %d, done %d\n",
452 to_write, hs_req->req.length, can_write, buf_pos);
457 hs_req->req.actual = buf_pos + to_write;
458 hs_ep->total_data += to_write;
461 hs_ep->fifo_load += to_write;
463 to_write = DIV_ROUND_UP(to_write, 4);
464 data = hs_req->req.buf + buf_pos;
466 iowrite32_rep(hsotg->regs + EPFIFO(hs_ep->index), data, to_write);
468 return (to_write >= can_write) ? -ENOSPC : 0;
472 * get_ep_limit - get the maximum data legnth for this endpoint
473 * @hs_ep: The endpoint
475 * Return the maximum data that can be queued in one go on a given endpoint
476 * so that transfers that are too long can be split.
478 static unsigned get_ep_limit(struct dwc2_hsotg_ep *hs_ep)
480 int index = hs_ep->index;
485 maxsize = DXEPTSIZ_XFERSIZE_LIMIT + 1;
486 maxpkt = DXEPTSIZ_PKTCNT_LIMIT + 1;
490 maxpkt = DIEPTSIZ0_PKTCNT_LIMIT + 1;
495 /* we made the constant loading easier above by using +1 */
500 * constrain by packet count if maxpkts*pktsize is greater
501 * than the length register size.
504 if ((maxpkt * hs_ep->ep.maxpacket) < maxsize)
505 maxsize = maxpkt * hs_ep->ep.maxpacket;
511 * dwc2_hsotg_start_req - start a USB request from an endpoint's queue
512 * @hsotg: The controller state.
513 * @hs_ep: The endpoint to process a request for
514 * @hs_req: The request to start.
515 * @continuing: True if we are doing more for the current request.
517 * Start the given request running by setting the endpoint registers
518 * appropriately, and writing any data to the FIFOs.
520 static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg,
521 struct dwc2_hsotg_ep *hs_ep,
522 struct dwc2_hsotg_req *hs_req,
525 struct usb_request *ureq = &hs_req->req;
526 int index = hs_ep->index;
527 int dir_in = hs_ep->dir_in;
537 if (hs_ep->req && !continuing) {
538 dev_err(hsotg->dev, "%s: active request\n", __func__);
541 } else if (hs_ep->req != hs_req && continuing) {
543 "%s: continue different req\n", __func__);
549 epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
550 epsize_reg = dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index);
552 dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x, ep %d, dir %s\n",
553 __func__, dwc2_readl(hsotg->regs + epctrl_reg), index,
554 hs_ep->dir_in ? "in" : "out");
556 /* If endpoint is stalled, we will restart request later */
557 ctrl = dwc2_readl(hsotg->regs + epctrl_reg);
559 if (index && ctrl & DXEPCTL_STALL) {
560 dev_warn(hsotg->dev, "%s: ep%d is stalled\n", __func__, index);
564 length = ureq->length - ureq->actual;
565 dev_dbg(hsotg->dev, "ureq->length:%d ureq->actual:%d\n",
566 ureq->length, ureq->actual);
568 maxreq = get_ep_limit(hs_ep);
569 if (length > maxreq) {
570 int round = maxreq % hs_ep->ep.maxpacket;
572 dev_dbg(hsotg->dev, "%s: length %d, max-req %d, r %d\n",
573 __func__, length, maxreq, round);
575 /* round down to multiple of packets */
583 packets = DIV_ROUND_UP(length, hs_ep->ep.maxpacket);
585 packets = 1; /* send one packet if length is zero. */
587 if (hs_ep->isochronous && length > (hs_ep->mc * hs_ep->ep.maxpacket)) {
588 dev_err(hsotg->dev, "req length > maxpacket*mc\n");
592 if (dir_in && index != 0)
593 if (hs_ep->isochronous)
594 epsize = DXEPTSIZ_MC(packets);
596 epsize = DXEPTSIZ_MC(1);
601 * zero length packet should be programmed on its own and should not
602 * be counted in DIEPTSIZ.PktCnt with other packets.
604 if (dir_in && ureq->zero && !continuing) {
605 /* Test if zlp is actually required. */
606 if ((ureq->length >= hs_ep->ep.maxpacket) &&
607 !(ureq->length % hs_ep->ep.maxpacket))
611 epsize |= DXEPTSIZ_PKTCNT(packets);
612 epsize |= DXEPTSIZ_XFERSIZE(length);
614 dev_dbg(hsotg->dev, "%s: %d@%d/%d, 0x%08x => 0x%08x\n",
615 __func__, packets, length, ureq->length, epsize, epsize_reg);
617 /* store the request as the current one we're doing */
620 /* write size / packets */
621 dwc2_writel(epsize, hsotg->regs + epsize_reg);
623 if (using_dma(hsotg) && !continuing) {
624 unsigned int dma_reg;
627 * write DMA address to control register, buffer already
628 * synced by dwc2_hsotg_ep_queue().
631 dma_reg = dir_in ? DIEPDMA(index) : DOEPDMA(index);
632 dwc2_writel(ureq->dma, hsotg->regs + dma_reg);
634 dev_dbg(hsotg->dev, "%s: %pad => 0x%08x\n",
635 __func__, &ureq->dma, dma_reg);
638 ctrl |= DXEPCTL_EPENA; /* ensure ep enabled */
639 ctrl |= DXEPCTL_USBACTEP;
641 dev_dbg(hsotg->dev, "ep0 state:%d\n", hsotg->ep0_state);
643 /* For Setup request do not clear NAK */
644 if (!(index == 0 && hsotg->ep0_state == DWC2_EP0_SETUP))
645 ctrl |= DXEPCTL_CNAK; /* clear NAK set by core */
647 dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl);
648 dwc2_writel(ctrl, hsotg->regs + epctrl_reg);
651 * set these, it seems that DMA support increments past the end
652 * of the packet buffer so we need to calculate the length from
655 hs_ep->size_loaded = length;
656 hs_ep->last_load = ureq->actual;
658 if (dir_in && !using_dma(hsotg)) {
659 /* set these anyway, we may need them for non-periodic in */
660 hs_ep->fifo_load = 0;
662 dwc2_hsotg_write_fifo(hsotg, hs_ep, hs_req);
666 * clear the INTknTXFEmpMsk when we start request, more as a aide
667 * to debugging to see what is going on.
670 dwc2_writel(DIEPMSK_INTKNTXFEMPMSK,
671 hsotg->regs + DIEPINT(index));
674 * Note, trying to clear the NAK here causes problems with transmit
675 * on the S3C6400 ending up with the TXFIFO becoming full.
678 /* check ep is enabled */
679 if (!(dwc2_readl(hsotg->regs + epctrl_reg) & DXEPCTL_EPENA))
681 "ep%d: failed to become enabled (DXEPCTL=0x%08x)?\n",
682 index, dwc2_readl(hsotg->regs + epctrl_reg));
684 dev_dbg(hsotg->dev, "%s: DXEPCTL=0x%08x\n",
685 __func__, dwc2_readl(hsotg->regs + epctrl_reg));
687 /* enable ep interrupts */
688 dwc2_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 1);
692 * dwc2_hsotg_map_dma - map the DMA memory being used for the request
693 * @hsotg: The device state.
694 * @hs_ep: The endpoint the request is on.
695 * @req: The request being processed.
697 * We've been asked to queue a request, so ensure that the memory buffer
698 * is correctly setup for DMA. If we've been passed an extant DMA address
699 * then ensure the buffer has been synced to memory. If our buffer has no
700 * DMA memory, then we map the memory and mark our request to allow us to
701 * cleanup on completion.
703 static int dwc2_hsotg_map_dma(struct dwc2_hsotg *hsotg,
704 struct dwc2_hsotg_ep *hs_ep,
705 struct usb_request *req)
707 struct dwc2_hsotg_req *hs_req = our_req(req);
710 /* if the length is zero, ignore the DMA data */
711 if (hs_req->req.length == 0)
714 ret = usb_gadget_map_request(&hsotg->gadget, req, hs_ep->dir_in);
721 dev_err(hsotg->dev, "%s: failed to map buffer %p, %d bytes\n",
722 __func__, req->buf, req->length);
727 static int dwc2_hsotg_handle_unaligned_buf_start(struct dwc2_hsotg *hsotg,
728 struct dwc2_hsotg_ep *hs_ep, struct dwc2_hsotg_req *hs_req)
730 void *req_buf = hs_req->req.buf;
732 /* If dma is not being used or buffer is aligned */
733 if (!using_dma(hsotg) || !((long)req_buf & 3))
736 WARN_ON(hs_req->saved_req_buf);
738 dev_dbg(hsotg->dev, "%s: %s: buf=%p length=%d\n", __func__,
739 hs_ep->ep.name, req_buf, hs_req->req.length);
741 hs_req->req.buf = kmalloc(hs_req->req.length, GFP_ATOMIC);
742 if (!hs_req->req.buf) {
743 hs_req->req.buf = req_buf;
745 "%s: unable to allocate memory for bounce buffer\n",
750 /* Save actual buffer */
751 hs_req->saved_req_buf = req_buf;
754 memcpy(hs_req->req.buf, req_buf, hs_req->req.length);
758 static void dwc2_hsotg_handle_unaligned_buf_complete(struct dwc2_hsotg *hsotg,
759 struct dwc2_hsotg_ep *hs_ep, struct dwc2_hsotg_req *hs_req)
761 /* If dma is not being used or buffer was aligned */
762 if (!using_dma(hsotg) || !hs_req->saved_req_buf)
765 dev_dbg(hsotg->dev, "%s: %s: status=%d actual-length=%d\n", __func__,
766 hs_ep->ep.name, hs_req->req.status, hs_req->req.actual);
768 /* Copy data from bounce buffer on successful out transfer */
769 if (!hs_ep->dir_in && !hs_req->req.status)
770 memcpy(hs_req->saved_req_buf, hs_req->req.buf,
773 /* Free bounce buffer */
774 kfree(hs_req->req.buf);
776 hs_req->req.buf = hs_req->saved_req_buf;
777 hs_req->saved_req_buf = NULL;
780 static int dwc2_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req,
783 struct dwc2_hsotg_req *hs_req = our_req(req);
784 struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
785 struct dwc2_hsotg *hs = hs_ep->parent;
789 dev_dbg(hs->dev, "%s: req %p: %d@%p, noi=%d, zero=%d, snok=%d\n",
790 ep->name, req, req->length, req->buf, req->no_interrupt,
791 req->zero, req->short_not_ok);
793 /* Prevent new request submission when controller is suspended */
794 if (hs->lx_state == DWC2_L2) {
795 dev_dbg(hs->dev, "%s: don't submit request while suspended\n",
800 /* initialise status of the request */
801 INIT_LIST_HEAD(&hs_req->queue);
803 req->status = -EINPROGRESS;
805 ret = dwc2_hsotg_handle_unaligned_buf_start(hs, hs_ep, hs_req);
809 /* if we're using DMA, sync the buffers as necessary */
811 ret = dwc2_hsotg_map_dma(hs, hs_ep, req);
816 first = list_empty(&hs_ep->queue);
817 list_add_tail(&hs_req->queue, &hs_ep->queue);
820 dwc2_hsotg_start_req(hs, hs_ep, hs_req, false);
825 static int dwc2_hsotg_ep_queue_lock(struct usb_ep *ep, struct usb_request *req,
828 struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
829 struct dwc2_hsotg *hs = hs_ep->parent;
830 unsigned long flags = 0;
833 spin_lock_irqsave(&hs->lock, flags);
834 ret = dwc2_hsotg_ep_queue(ep, req, gfp_flags);
835 spin_unlock_irqrestore(&hs->lock, flags);
840 static void dwc2_hsotg_ep_free_request(struct usb_ep *ep,
841 struct usb_request *req)
843 struct dwc2_hsotg_req *hs_req = our_req(req);
849 * dwc2_hsotg_complete_oursetup - setup completion callback
850 * @ep: The endpoint the request was on.
851 * @req: The request completed.
853 * Called on completion of any requests the driver itself
854 * submitted that need cleaning up.
856 static void dwc2_hsotg_complete_oursetup(struct usb_ep *ep,
857 struct usb_request *req)
859 struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
860 struct dwc2_hsotg *hsotg = hs_ep->parent;
862 dev_dbg(hsotg->dev, "%s: ep %p, req %p\n", __func__, ep, req);
864 dwc2_hsotg_ep_free_request(ep, req);
868 * ep_from_windex - convert control wIndex value to endpoint
869 * @hsotg: The driver state.
870 * @windex: The control request wIndex field (in host order).
872 * Convert the given wIndex into a pointer to an driver endpoint
873 * structure, or return NULL if it is not a valid endpoint.
875 static struct dwc2_hsotg_ep *ep_from_windex(struct dwc2_hsotg *hsotg,
878 struct dwc2_hsotg_ep *ep;
879 int dir = (windex & USB_DIR_IN) ? 1 : 0;
880 int idx = windex & 0x7F;
885 if (idx > hsotg->num_of_eps)
888 ep = index_to_ep(hsotg, idx, dir);
890 if (idx && ep->dir_in != dir)
897 * dwc2_hsotg_set_test_mode - Enable usb Test Modes
898 * @hsotg: The driver state.
899 * @testmode: requested usb test mode
900 * Enable usb Test Mode requested by the Host.
902 int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode)
904 int dctl = dwc2_readl(hsotg->regs + DCTL);
906 dctl &= ~DCTL_TSTCTL_MASK;
913 dctl |= testmode << DCTL_TSTCTL_SHIFT;
918 dwc2_writel(dctl, hsotg->regs + DCTL);
923 * dwc2_hsotg_send_reply - send reply to control request
924 * @hsotg: The device state
926 * @buff: Buffer for request
927 * @length: Length of reply.
929 * Create a request and queue it on the given endpoint. This is useful as
930 * an internal method of sending replies to certain control requests, etc.
932 static int dwc2_hsotg_send_reply(struct dwc2_hsotg *hsotg,
933 struct dwc2_hsotg_ep *ep,
937 struct usb_request *req;
940 dev_dbg(hsotg->dev, "%s: buff %p, len %d\n", __func__, buff, length);
942 req = dwc2_hsotg_ep_alloc_request(&ep->ep, GFP_ATOMIC);
943 hsotg->ep0_reply = req;
945 dev_warn(hsotg->dev, "%s: cannot alloc req\n", __func__);
949 req->buf = hsotg->ep0_buff;
950 req->length = length;
952 * zero flag is for sending zlp in DATA IN stage. It has no impact on
956 req->complete = dwc2_hsotg_complete_oursetup;
959 memcpy(req->buf, buff, length);
961 ret = dwc2_hsotg_ep_queue(&ep->ep, req, GFP_ATOMIC);
963 dev_warn(hsotg->dev, "%s: cannot queue req\n", __func__);
971 * dwc2_hsotg_process_req_status - process request GET_STATUS
972 * @hsotg: The device state
973 * @ctrl: USB control request
975 static int dwc2_hsotg_process_req_status(struct dwc2_hsotg *hsotg,
976 struct usb_ctrlrequest *ctrl)
978 struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0];
979 struct dwc2_hsotg_ep *ep;
983 dev_dbg(hsotg->dev, "%s: USB_REQ_GET_STATUS\n", __func__);
986 dev_warn(hsotg->dev, "%s: direction out?\n", __func__);
990 switch (ctrl->bRequestType & USB_RECIP_MASK) {
991 case USB_RECIP_DEVICE:
992 reply = cpu_to_le16(0); /* bit 0 => self powered,
993 * bit 1 => remote wakeup */
996 case USB_RECIP_INTERFACE:
997 /* currently, the data result should be zero */
998 reply = cpu_to_le16(0);
1001 case USB_RECIP_ENDPOINT:
1002 ep = ep_from_windex(hsotg, le16_to_cpu(ctrl->wIndex));
1006 reply = cpu_to_le16(ep->halted ? 1 : 0);
1013 if (le16_to_cpu(ctrl->wLength) != 2)
1016 ret = dwc2_hsotg_send_reply(hsotg, ep0, &reply, 2);
1018 dev_err(hsotg->dev, "%s: failed to send reply\n", __func__);
1025 static int dwc2_hsotg_ep_sethalt(struct usb_ep *ep, int value);
1028 * get_ep_head - return the first request on the endpoint
1029 * @hs_ep: The controller endpoint to get
1031 * Get the first request on the endpoint.
1033 static struct dwc2_hsotg_req *get_ep_head(struct dwc2_hsotg_ep *hs_ep)
1035 if (list_empty(&hs_ep->queue))
1038 return list_first_entry(&hs_ep->queue, struct dwc2_hsotg_req, queue);
1042 * dwc2_hsotg_process_req_feature - process request {SET,CLEAR}_FEATURE
1043 * @hsotg: The device state
1044 * @ctrl: USB control request
1046 static int dwc2_hsotg_process_req_feature(struct dwc2_hsotg *hsotg,
1047 struct usb_ctrlrequest *ctrl)
1049 struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0];
1050 struct dwc2_hsotg_req *hs_req;
1052 bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE);
1053 struct dwc2_hsotg_ep *ep;
1060 dev_dbg(hsotg->dev, "%s: %s_FEATURE\n",
1061 __func__, set ? "SET" : "CLEAR");
1063 wValue = le16_to_cpu(ctrl->wValue);
1064 wIndex = le16_to_cpu(ctrl->wIndex);
1065 recip = ctrl->bRequestType & USB_RECIP_MASK;
1068 case USB_RECIP_DEVICE:
1070 case USB_DEVICE_TEST_MODE:
1071 if ((wIndex & 0xff) != 0)
1076 hsotg->test_mode = wIndex >> 8;
1077 ret = dwc2_hsotg_send_reply(hsotg, ep0, NULL, 0);
1080 "%s: failed to send reply\n", __func__);
1089 case USB_RECIP_ENDPOINT:
1090 ep = ep_from_windex(hsotg, wIndex);
1092 dev_dbg(hsotg->dev, "%s: no endpoint for 0x%04x\n",
1098 case USB_ENDPOINT_HALT:
1099 halted = ep->halted;
1101 dwc2_hsotg_ep_sethalt(&ep->ep, set);
1103 ret = dwc2_hsotg_send_reply(hsotg, ep0, NULL, 0);
1106 "%s: failed to send reply\n", __func__);
1111 * we have to complete all requests for ep if it was
1112 * halted, and the halt was cleared by CLEAR_FEATURE
1115 if (!set && halted) {
1117 * If we have request in progress,
1123 list_del_init(&hs_req->queue);
1124 if (hs_req->req.complete) {
1125 spin_unlock(&hsotg->lock);
1126 usb_gadget_giveback_request(
1127 &ep->ep, &hs_req->req);
1128 spin_lock(&hsotg->lock);
1132 /* If we have pending request, then start it */
1134 restart = !list_empty(&ep->queue);
1136 hs_req = get_ep_head(ep);
1137 dwc2_hsotg_start_req(hsotg, ep,
1155 static void dwc2_hsotg_enqueue_setup(struct dwc2_hsotg *hsotg);
1158 * dwc2_hsotg_stall_ep0 - stall ep0
1159 * @hsotg: The device state
1161 * Set stall for ep0 as response for setup request.
1163 static void dwc2_hsotg_stall_ep0(struct dwc2_hsotg *hsotg)
1165 struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0];
1169 dev_dbg(hsotg->dev, "ep0 stall (dir=%d)\n", ep0->dir_in);
1170 reg = (ep0->dir_in) ? DIEPCTL0 : DOEPCTL0;
1173 * DxEPCTL_Stall will be cleared by EP once it has
1174 * taken effect, so no need to clear later.
1177 ctrl = dwc2_readl(hsotg->regs + reg);
1178 ctrl |= DXEPCTL_STALL;
1179 ctrl |= DXEPCTL_CNAK;
1180 dwc2_writel(ctrl, hsotg->regs + reg);
1183 "written DXEPCTL=0x%08x to %08x (DXEPCTL=0x%08x)\n",
1184 ctrl, reg, dwc2_readl(hsotg->regs + reg));
1187 * complete won't be called, so we enqueue
1188 * setup request here
1190 dwc2_hsotg_enqueue_setup(hsotg);
1194 * dwc2_hsotg_process_control - process a control request
1195 * @hsotg: The device state
1196 * @ctrl: The control request received
1198 * The controller has received the SETUP phase of a control request, and
1199 * needs to work out what to do next (and whether to pass it on to the
1202 static void dwc2_hsotg_process_control(struct dwc2_hsotg *hsotg,
1203 struct usb_ctrlrequest *ctrl)
1205 struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0];
1210 "ctrl Type=%02x, Req=%02x, V=%04x, I=%04x, L=%04x\n",
1211 ctrl->bRequestType, ctrl->bRequest, ctrl->wValue,
1212 ctrl->wIndex, ctrl->wLength);
1214 if (ctrl->wLength == 0) {
1216 hsotg->ep0_state = DWC2_EP0_STATUS_IN;
1217 } else if (ctrl->bRequestType & USB_DIR_IN) {
1219 hsotg->ep0_state = DWC2_EP0_DATA_IN;
1222 hsotg->ep0_state = DWC2_EP0_DATA_OUT;
1225 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1226 switch (ctrl->bRequest) {
1227 case USB_REQ_SET_ADDRESS:
1228 hsotg->connected = 1;
1229 dcfg = dwc2_readl(hsotg->regs + DCFG);
1230 dcfg &= ~DCFG_DEVADDR_MASK;
1231 dcfg |= (le16_to_cpu(ctrl->wValue) <<
1232 DCFG_DEVADDR_SHIFT) & DCFG_DEVADDR_MASK;
1233 dwc2_writel(dcfg, hsotg->regs + DCFG);
1235 dev_info(hsotg->dev, "new address %d\n", ctrl->wValue);
1237 ret = dwc2_hsotg_send_reply(hsotg, ep0, NULL, 0);
1240 case USB_REQ_GET_STATUS:
1241 ret = dwc2_hsotg_process_req_status(hsotg, ctrl);
1244 case USB_REQ_CLEAR_FEATURE:
1245 case USB_REQ_SET_FEATURE:
1246 ret = dwc2_hsotg_process_req_feature(hsotg, ctrl);
1251 /* as a fallback, try delivering it to the driver to deal with */
1253 if (ret == 0 && hsotg->driver) {
1254 spin_unlock(&hsotg->lock);
1255 ret = hsotg->driver->setup(&hsotg->gadget, ctrl);
1256 spin_lock(&hsotg->lock);
1258 dev_dbg(hsotg->dev, "driver->setup() ret %d\n", ret);
1262 * the request is either unhandlable, or is not formatted correctly
1263 * so respond with a STALL for the status stage to indicate failure.
1267 dwc2_hsotg_stall_ep0(hsotg);
1271 * dwc2_hsotg_complete_setup - completion of a setup transfer
1272 * @ep: The endpoint the request was on.
1273 * @req: The request completed.
1275 * Called on completion of any requests the driver itself submitted for
1278 static void dwc2_hsotg_complete_setup(struct usb_ep *ep,
1279 struct usb_request *req)
1281 struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
1282 struct dwc2_hsotg *hsotg = hs_ep->parent;
1284 if (req->status < 0) {
1285 dev_dbg(hsotg->dev, "%s: failed %d\n", __func__, req->status);
1289 spin_lock(&hsotg->lock);
1290 if (req->actual == 0)
1291 dwc2_hsotg_enqueue_setup(hsotg);
1293 dwc2_hsotg_process_control(hsotg, req->buf);
1294 spin_unlock(&hsotg->lock);
1298 * dwc2_hsotg_enqueue_setup - start a request for EP0 packets
1299 * @hsotg: The device state.
1301 * Enqueue a request on EP0 if necessary to received any SETUP packets
1302 * received from the host.
1304 static void dwc2_hsotg_enqueue_setup(struct dwc2_hsotg *hsotg)
1306 struct usb_request *req = hsotg->ctrl_req;
1307 struct dwc2_hsotg_req *hs_req = our_req(req);
1310 dev_dbg(hsotg->dev, "%s: queueing setup request\n", __func__);
1314 req->buf = hsotg->ctrl_buff;
1315 req->complete = dwc2_hsotg_complete_setup;
1317 if (!list_empty(&hs_req->queue)) {
1318 dev_dbg(hsotg->dev, "%s already queued???\n", __func__);
1322 hsotg->eps_out[0]->dir_in = 0;
1323 hsotg->eps_out[0]->send_zlp = 0;
1324 hsotg->ep0_state = DWC2_EP0_SETUP;
1326 ret = dwc2_hsotg_ep_queue(&hsotg->eps_out[0]->ep, req, GFP_ATOMIC);
1328 dev_err(hsotg->dev, "%s: failed queue (%d)\n", __func__, ret);
1330 * Don't think there's much we can do other than watch the
1336 static void dwc2_hsotg_program_zlp(struct dwc2_hsotg *hsotg,
1337 struct dwc2_hsotg_ep *hs_ep)
1340 u8 index = hs_ep->index;
1341 u32 epctl_reg = hs_ep->dir_in ? DIEPCTL(index) : DOEPCTL(index);
1342 u32 epsiz_reg = hs_ep->dir_in ? DIEPTSIZ(index) : DOEPTSIZ(index);
1345 dev_dbg(hsotg->dev, "Sending zero-length packet on ep%d\n",
1348 dev_dbg(hsotg->dev, "Receiving zero-length packet on ep%d\n",
1351 dwc2_writel(DXEPTSIZ_MC(1) | DXEPTSIZ_PKTCNT(1) |
1352 DXEPTSIZ_XFERSIZE(0), hsotg->regs +
1355 ctrl = dwc2_readl(hsotg->regs + epctl_reg);
1356 ctrl |= DXEPCTL_CNAK; /* clear NAK set by core */
1357 ctrl |= DXEPCTL_EPENA; /* ensure ep enabled */
1358 ctrl |= DXEPCTL_USBACTEP;
1359 dwc2_writel(ctrl, hsotg->regs + epctl_reg);
1363 * dwc2_hsotg_complete_request - complete a request given to us
1364 * @hsotg: The device state.
1365 * @hs_ep: The endpoint the request was on.
1366 * @hs_req: The request to complete.
1367 * @result: The result code (0 => Ok, otherwise errno)
1369 * The given request has finished, so call the necessary completion
1370 * if it has one and then look to see if we can start a new request
1373 * Note, expects the ep to already be locked as appropriate.
1375 static void dwc2_hsotg_complete_request(struct dwc2_hsotg *hsotg,
1376 struct dwc2_hsotg_ep *hs_ep,
1377 struct dwc2_hsotg_req *hs_req,
1383 dev_dbg(hsotg->dev, "%s: nothing to complete?\n", __func__);
1387 dev_dbg(hsotg->dev, "complete: ep %p %s, req %p, %d => %p\n",
1388 hs_ep, hs_ep->ep.name, hs_req, result, hs_req->req.complete);
1391 * only replace the status if we've not already set an error
1392 * from a previous transaction
1395 if (hs_req->req.status == -EINPROGRESS)
1396 hs_req->req.status = result;
1398 dwc2_hsotg_handle_unaligned_buf_complete(hsotg, hs_ep, hs_req);
1401 list_del_init(&hs_req->queue);
1403 if (using_dma(hsotg))
1404 dwc2_hsotg_unmap_dma(hsotg, hs_ep, hs_req);
1407 * call the complete request with the locks off, just in case the
1408 * request tries to queue more work for this endpoint.
1411 if (hs_req->req.complete) {
1412 spin_unlock(&hsotg->lock);
1413 usb_gadget_giveback_request(&hs_ep->ep, &hs_req->req);
1414 spin_lock(&hsotg->lock);
1418 * Look to see if there is anything else to do. Note, the completion
1419 * of the previous request may have caused a new request to be started
1420 * so be careful when doing this.
1423 if (!hs_ep->req && result >= 0) {
1424 restart = !list_empty(&hs_ep->queue);
1426 hs_req = get_ep_head(hs_ep);
1427 dwc2_hsotg_start_req(hsotg, hs_ep, hs_req, false);
1433 * dwc2_hsotg_rx_data - receive data from the FIFO for an endpoint
1434 * @hsotg: The device state.
1435 * @ep_idx: The endpoint index for the data
1436 * @size: The size of data in the fifo, in bytes
1438 * The FIFO status shows there is data to read from the FIFO for a given
1439 * endpoint, so sort out whether we need to read the data into a request
1440 * that has been made for that endpoint.
1442 static void dwc2_hsotg_rx_data(struct dwc2_hsotg *hsotg, int ep_idx, int size)
1444 struct dwc2_hsotg_ep *hs_ep = hsotg->eps_out[ep_idx];
1445 struct dwc2_hsotg_req *hs_req = hs_ep->req;
1446 void __iomem *fifo = hsotg->regs + EPFIFO(ep_idx);
1453 u32 epctl = dwc2_readl(hsotg->regs + DOEPCTL(ep_idx));
1457 "%s: FIFO %d bytes on ep%d but no req (DXEPCTl=0x%08x)\n",
1458 __func__, size, ep_idx, epctl);
1460 /* dump the data from the FIFO, we've nothing we can do */
1461 for (ptr = 0; ptr < size; ptr += 4)
1462 (void)dwc2_readl(fifo);
1468 read_ptr = hs_req->req.actual;
1469 max_req = hs_req->req.length - read_ptr;
1471 dev_dbg(hsotg->dev, "%s: read %d/%d, done %d/%d\n",
1472 __func__, to_read, max_req, read_ptr, hs_req->req.length);
1474 if (to_read > max_req) {
1476 * more data appeared than we where willing
1477 * to deal with in this request.
1480 /* currently we don't deal this */
1484 hs_ep->total_data += to_read;
1485 hs_req->req.actual += to_read;
1486 to_read = DIV_ROUND_UP(to_read, 4);
1489 * note, we might over-write the buffer end by 3 bytes depending on
1490 * alignment of the data.
1492 ioread32_rep(fifo, hs_req->req.buf + read_ptr, to_read);
1496 * dwc2_hsotg_ep0_zlp - send/receive zero-length packet on control endpoint
1497 * @hsotg: The device instance
1498 * @dir_in: If IN zlp
1500 * Generate a zero-length IN packet request for terminating a SETUP
1503 * Note, since we don't write any data to the TxFIFO, then it is
1504 * currently believed that we do not need to wait for any space in
1507 static void dwc2_hsotg_ep0_zlp(struct dwc2_hsotg *hsotg, bool dir_in)
1509 /* eps_out[0] is used in both directions */
1510 hsotg->eps_out[0]->dir_in = dir_in;
1511 hsotg->ep0_state = dir_in ? DWC2_EP0_STATUS_IN : DWC2_EP0_STATUS_OUT;
1513 dwc2_hsotg_program_zlp(hsotg, hsotg->eps_out[0]);
1517 * dwc2_hsotg_handle_outdone - handle receiving OutDone/SetupDone from RXFIFO
1518 * @hsotg: The device instance
1519 * @epnum: The endpoint received from
1521 * The RXFIFO has delivered an OutDone event, which means that the data
1522 * transfer for an OUT endpoint has been completed, either by a short
1523 * packet or by the finish of a transfer.
1525 static void dwc2_hsotg_handle_outdone(struct dwc2_hsotg *hsotg, int epnum)
1527 u32 epsize = dwc2_readl(hsotg->regs + DOEPTSIZ(epnum));
1528 struct dwc2_hsotg_ep *hs_ep = hsotg->eps_out[epnum];
1529 struct dwc2_hsotg_req *hs_req = hs_ep->req;
1530 struct usb_request *req = &hs_req->req;
1531 unsigned size_left = DXEPTSIZ_XFERSIZE_GET(epsize);
1535 dev_dbg(hsotg->dev, "%s: no request active\n", __func__);
1539 if (epnum == 0 && hsotg->ep0_state == DWC2_EP0_STATUS_OUT) {
1540 dev_dbg(hsotg->dev, "zlp packet received\n");
1541 dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0);
1542 dwc2_hsotg_enqueue_setup(hsotg);
1546 if (using_dma(hsotg)) {
1550 * Calculate the size of the transfer by checking how much
1551 * is left in the endpoint size register and then working it
1552 * out from the amount we loaded for the transfer.
1554 * We need to do this as DMA pointers are always 32bit aligned
1555 * so may overshoot/undershoot the transfer.
1558 size_done = hs_ep->size_loaded - size_left;
1559 size_done += hs_ep->last_load;
1561 req->actual = size_done;
1564 /* if there is more request to do, schedule new transfer */
1565 if (req->actual < req->length && size_left == 0) {
1566 dwc2_hsotg_start_req(hsotg, hs_ep, hs_req, true);
1570 if (req->actual < req->length && req->short_not_ok) {
1571 dev_dbg(hsotg->dev, "%s: got %d/%d (short not ok) => error\n",
1572 __func__, req->actual, req->length);
1575 * todo - what should we return here? there's no one else
1576 * even bothering to check the status.
1580 if (epnum == 0 && hsotg->ep0_state == DWC2_EP0_DATA_OUT) {
1581 /* Move to STATUS IN */
1582 dwc2_hsotg_ep0_zlp(hsotg, true);
1586 dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, result);
1590 * dwc2_hsotg_read_frameno - read current frame number
1591 * @hsotg: The device instance
1593 * Return the current frame number
1595 static u32 dwc2_hsotg_read_frameno(struct dwc2_hsotg *hsotg)
1599 dsts = dwc2_readl(hsotg->regs + DSTS);
1600 dsts &= DSTS_SOFFN_MASK;
1601 dsts >>= DSTS_SOFFN_SHIFT;
1607 * dwc2_hsotg_handle_rx - RX FIFO has data
1608 * @hsotg: The device instance
1610 * The IRQ handler has detected that the RX FIFO has some data in it
1611 * that requires processing, so find out what is in there and do the
1614 * The RXFIFO is a true FIFO, the packets coming out are still in packet
1615 * chunks, so if you have x packets received on an endpoint you'll get x
1616 * FIFO events delivered, each with a packet's worth of data in it.
1618 * When using DMA, we should not be processing events from the RXFIFO
1619 * as the actual data should be sent to the memory directly and we turn
1620 * on the completion interrupts to get notifications of transfer completion.
1622 static void dwc2_hsotg_handle_rx(struct dwc2_hsotg *hsotg)
1624 u32 grxstsr = dwc2_readl(hsotg->regs + GRXSTSP);
1625 u32 epnum, status, size;
1627 WARN_ON(using_dma(hsotg));
1629 epnum = grxstsr & GRXSTS_EPNUM_MASK;
1630 status = grxstsr & GRXSTS_PKTSTS_MASK;
1632 size = grxstsr & GRXSTS_BYTECNT_MASK;
1633 size >>= GRXSTS_BYTECNT_SHIFT;
1635 dev_dbg(hsotg->dev, "%s: GRXSTSP=0x%08x (%d@%d)\n",
1636 __func__, grxstsr, size, epnum);
1638 switch ((status & GRXSTS_PKTSTS_MASK) >> GRXSTS_PKTSTS_SHIFT) {
1639 case GRXSTS_PKTSTS_GLOBALOUTNAK:
1640 dev_dbg(hsotg->dev, "GLOBALOUTNAK\n");
1643 case GRXSTS_PKTSTS_OUTDONE:
1644 dev_dbg(hsotg->dev, "OutDone (Frame=0x%08x)\n",
1645 dwc2_hsotg_read_frameno(hsotg));
1647 if (!using_dma(hsotg))
1648 dwc2_hsotg_handle_outdone(hsotg, epnum);
1651 case GRXSTS_PKTSTS_SETUPDONE:
1653 "SetupDone (Frame=0x%08x, DOPEPCTL=0x%08x)\n",
1654 dwc2_hsotg_read_frameno(hsotg),
1655 dwc2_readl(hsotg->regs + DOEPCTL(0)));
1657 * Call dwc2_hsotg_handle_outdone here if it was not called from
1658 * GRXSTS_PKTSTS_OUTDONE. That is, if the core didn't
1659 * generate GRXSTS_PKTSTS_OUTDONE for setup packet.
1661 if (hsotg->ep0_state == DWC2_EP0_SETUP)
1662 dwc2_hsotg_handle_outdone(hsotg, epnum);
1665 case GRXSTS_PKTSTS_OUTRX:
1666 dwc2_hsotg_rx_data(hsotg, epnum, size);
1669 case GRXSTS_PKTSTS_SETUPRX:
1671 "SetupRX (Frame=0x%08x, DOPEPCTL=0x%08x)\n",
1672 dwc2_hsotg_read_frameno(hsotg),
1673 dwc2_readl(hsotg->regs + DOEPCTL(0)));
1675 WARN_ON(hsotg->ep0_state != DWC2_EP0_SETUP);
1677 dwc2_hsotg_rx_data(hsotg, epnum, size);
1681 dev_warn(hsotg->dev, "%s: unknown status %08x\n",
1684 dwc2_hsotg_dump(hsotg);
1690 * dwc2_hsotg_ep0_mps - turn max packet size into register setting
1691 * @mps: The maximum packet size in bytes.
1693 static u32 dwc2_hsotg_ep0_mps(unsigned int mps)
1697 return D0EPCTL_MPS_64;
1699 return D0EPCTL_MPS_32;
1701 return D0EPCTL_MPS_16;
1703 return D0EPCTL_MPS_8;
1706 /* bad max packet size, warn and return invalid result */
1712 * dwc2_hsotg_set_ep_maxpacket - set endpoint's max-packet field
1713 * @hsotg: The driver state.
1714 * @ep: The index number of the endpoint
1715 * @mps: The maximum packet size in bytes
1717 * Configure the maximum packet size for the given endpoint, updating
1718 * the hardware control registers to reflect this.
1720 static void dwc2_hsotg_set_ep_maxpacket(struct dwc2_hsotg *hsotg,
1721 unsigned int ep, unsigned int mps, unsigned int dir_in)
1723 struct dwc2_hsotg_ep *hs_ep;
1724 void __iomem *regs = hsotg->regs;
1729 hs_ep = index_to_ep(hsotg, ep, dir_in);
1734 /* EP0 is a special case */
1735 mpsval = dwc2_hsotg_ep0_mps(mps);
1738 hs_ep->ep.maxpacket = mps;
1741 mpsval = mps & DXEPCTL_MPS_MASK;
1744 mcval = ((mps >> 11) & 0x3) + 1;
1748 hs_ep->ep.maxpacket = mpsval;
1752 reg = dwc2_readl(regs + DIEPCTL(ep));
1753 reg &= ~DXEPCTL_MPS_MASK;
1755 dwc2_writel(reg, regs + DIEPCTL(ep));
1757 reg = dwc2_readl(regs + DOEPCTL(ep));
1758 reg &= ~DXEPCTL_MPS_MASK;
1760 dwc2_writel(reg, regs + DOEPCTL(ep));
1766 dev_err(hsotg->dev, "ep%d: bad mps of %d\n", ep, mps);
1770 * dwc2_hsotg_txfifo_flush - flush Tx FIFO
1771 * @hsotg: The driver state
1772 * @idx: The index for the endpoint (0..15)
1774 static void dwc2_hsotg_txfifo_flush(struct dwc2_hsotg *hsotg, unsigned int idx)
1779 dwc2_writel(GRSTCTL_TXFNUM(idx) | GRSTCTL_TXFFLSH,
1780 hsotg->regs + GRSTCTL);
1782 /* wait until the fifo is flushed */
1786 val = dwc2_readl(hsotg->regs + GRSTCTL);
1788 if ((val & (GRSTCTL_TXFFLSH)) == 0)
1791 if (--timeout == 0) {
1793 "%s: timeout flushing fifo (GRSTCTL=%08x)\n",
1803 * dwc2_hsotg_trytx - check to see if anything needs transmitting
1804 * @hsotg: The driver state
1805 * @hs_ep: The driver endpoint to check.
1807 * Check to see if there is a request that has data to send, and if so
1808 * make an attempt to write data into the FIFO.
1810 static int dwc2_hsotg_trytx(struct dwc2_hsotg *hsotg,
1811 struct dwc2_hsotg_ep *hs_ep)
1813 struct dwc2_hsotg_req *hs_req = hs_ep->req;
1815 if (!hs_ep->dir_in || !hs_req) {
1817 * if request is not enqueued, we disable interrupts
1818 * for endpoints, excepting ep0
1820 if (hs_ep->index != 0)
1821 dwc2_hsotg_ctrl_epint(hsotg, hs_ep->index,
1826 if (hs_req->req.actual < hs_req->req.length) {
1827 dev_dbg(hsotg->dev, "trying to write more for ep%d\n",
1829 return dwc2_hsotg_write_fifo(hsotg, hs_ep, hs_req);
1836 * dwc2_hsotg_complete_in - complete IN transfer
1837 * @hsotg: The device state.
1838 * @hs_ep: The endpoint that has just completed.
1840 * An IN transfer has been completed, update the transfer's state and then
1841 * call the relevant completion routines.
1843 static void dwc2_hsotg_complete_in(struct dwc2_hsotg *hsotg,
1844 struct dwc2_hsotg_ep *hs_ep)
1846 struct dwc2_hsotg_req *hs_req = hs_ep->req;
1847 u32 epsize = dwc2_readl(hsotg->regs + DIEPTSIZ(hs_ep->index));
1848 int size_left, size_done;
1851 dev_dbg(hsotg->dev, "XferCompl but no req\n");
1855 /* Finish ZLP handling for IN EP0 transactions */
1856 if (hs_ep->index == 0 && hsotg->ep0_state == DWC2_EP0_STATUS_IN) {
1857 dev_dbg(hsotg->dev, "zlp packet sent\n");
1858 dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0);
1859 if (hsotg->test_mode) {
1862 ret = dwc2_hsotg_set_test_mode(hsotg, hsotg->test_mode);
1864 dev_dbg(hsotg->dev, "Invalid Test #%d\n",
1866 dwc2_hsotg_stall_ep0(hsotg);
1870 dwc2_hsotg_enqueue_setup(hsotg);
1875 * Calculate the size of the transfer by checking how much is left
1876 * in the endpoint size register and then working it out from
1877 * the amount we loaded for the transfer.
1879 * We do this even for DMA, as the transfer may have incremented
1880 * past the end of the buffer (DMA transfers are always 32bit
1884 size_left = DXEPTSIZ_XFERSIZE_GET(epsize);
1886 size_done = hs_ep->size_loaded - size_left;
1887 size_done += hs_ep->last_load;
1889 if (hs_req->req.actual != size_done)
1890 dev_dbg(hsotg->dev, "%s: adjusting size done %d => %d\n",
1891 __func__, hs_req->req.actual, size_done);
1893 hs_req->req.actual = size_done;
1894 dev_dbg(hsotg->dev, "req->length:%d req->actual:%d req->zero:%d\n",
1895 hs_req->req.length, hs_req->req.actual, hs_req->req.zero);
1897 if (!size_left && hs_req->req.actual < hs_req->req.length) {
1898 dev_dbg(hsotg->dev, "%s trying more for req...\n", __func__);
1899 dwc2_hsotg_start_req(hsotg, hs_ep, hs_req, true);
1903 /* Zlp for all endpoints, for ep0 only in DATA IN stage */
1904 if (hs_ep->send_zlp) {
1905 dwc2_hsotg_program_zlp(hsotg, hs_ep);
1906 hs_ep->send_zlp = 0;
1907 /* transfer will be completed on next complete interrupt */
1911 if (hs_ep->index == 0 && hsotg->ep0_state == DWC2_EP0_DATA_IN) {
1912 /* Move to STATUS OUT */
1913 dwc2_hsotg_ep0_zlp(hsotg, false);
1917 dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0);
1921 * dwc2_hsotg_epint - handle an in/out endpoint interrupt
1922 * @hsotg: The driver state
1923 * @idx: The index for the endpoint (0..15)
1924 * @dir_in: Set if this is an IN endpoint
1926 * Process and clear any interrupt pending for an individual endpoint
1928 static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
1931 struct dwc2_hsotg_ep *hs_ep = index_to_ep(hsotg, idx, dir_in);
1932 u32 epint_reg = dir_in ? DIEPINT(idx) : DOEPINT(idx);
1933 u32 epctl_reg = dir_in ? DIEPCTL(idx) : DOEPCTL(idx);
1934 u32 epsiz_reg = dir_in ? DIEPTSIZ(idx) : DOEPTSIZ(idx);
1938 ints = dwc2_readl(hsotg->regs + epint_reg);
1939 ctrl = dwc2_readl(hsotg->regs + epctl_reg);
1941 /* Clear endpoint interrupts */
1942 dwc2_writel(ints, hsotg->regs + epint_reg);
1945 dev_err(hsotg->dev, "%s:Interrupt for unconfigured ep%d(%s)\n",
1946 __func__, idx, dir_in ? "in" : "out");
1950 dev_dbg(hsotg->dev, "%s: ep%d(%s) DxEPINT=0x%08x\n",
1951 __func__, idx, dir_in ? "in" : "out", ints);
1953 /* Don't process XferCompl interrupt if it is a setup packet */
1954 if (idx == 0 && (ints & (DXEPINT_SETUP | DXEPINT_SETUP_RCVD)))
1955 ints &= ~DXEPINT_XFERCOMPL;
1957 if (ints & DXEPINT_XFERCOMPL) {
1958 if (hs_ep->isochronous && hs_ep->interval == 1) {
1959 if (ctrl & DXEPCTL_EOFRNUM)
1960 ctrl |= DXEPCTL_SETEVENFR;
1962 ctrl |= DXEPCTL_SETODDFR;
1963 dwc2_writel(ctrl, hsotg->regs + epctl_reg);
1967 "%s: XferCompl: DxEPCTL=0x%08x, DXEPTSIZ=%08x\n",
1968 __func__, dwc2_readl(hsotg->regs + epctl_reg),
1969 dwc2_readl(hsotg->regs + epsiz_reg));
1972 * we get OutDone from the FIFO, so we only need to look
1973 * at completing IN requests here
1976 dwc2_hsotg_complete_in(hsotg, hs_ep);
1978 if (idx == 0 && !hs_ep->req)
1979 dwc2_hsotg_enqueue_setup(hsotg);
1980 } else if (using_dma(hsotg)) {
1982 * We're using DMA, we need to fire an OutDone here
1983 * as we ignore the RXFIFO.
1986 dwc2_hsotg_handle_outdone(hsotg, idx);
1990 if (ints & DXEPINT_EPDISBLD) {
1991 dev_dbg(hsotg->dev, "%s: EPDisbld\n", __func__);
1994 int epctl = dwc2_readl(hsotg->regs + epctl_reg);
1996 dwc2_hsotg_txfifo_flush(hsotg, hs_ep->fifo_index);
1998 if ((epctl & DXEPCTL_STALL) &&
1999 (epctl & DXEPCTL_EPTYPE_BULK)) {
2000 int dctl = dwc2_readl(hsotg->regs + DCTL);
2002 dctl |= DCTL_CGNPINNAK;
2003 dwc2_writel(dctl, hsotg->regs + DCTL);
2008 if (ints & DXEPINT_AHBERR)
2009 dev_dbg(hsotg->dev, "%s: AHBErr\n", __func__);
2011 if (ints & DXEPINT_SETUP) { /* Setup or Timeout */
2012 dev_dbg(hsotg->dev, "%s: Setup/Timeout\n", __func__);
2014 if (using_dma(hsotg) && idx == 0) {
2016 * this is the notification we've received a
2017 * setup packet. In non-DMA mode we'd get this
2018 * from the RXFIFO, instead we need to process
2025 dwc2_hsotg_handle_outdone(hsotg, 0);
2029 if (ints & DXEPINT_BACK2BACKSETUP)
2030 dev_dbg(hsotg->dev, "%s: B2BSetup/INEPNakEff\n", __func__);
2032 if (dir_in && !hs_ep->isochronous) {
2033 /* not sure if this is important, but we'll clear it anyway */
2034 if (ints & DIEPMSK_INTKNTXFEMPMSK) {
2035 dev_dbg(hsotg->dev, "%s: ep%d: INTknTXFEmpMsk\n",
2039 /* this probably means something bad is happening */
2040 if (ints & DIEPMSK_INTKNEPMISMSK) {
2041 dev_warn(hsotg->dev, "%s: ep%d: INTknEP\n",
2045 /* FIFO has space or is empty (see GAHBCFG) */
2046 if (hsotg->dedicated_fifos &&
2047 ints & DIEPMSK_TXFIFOEMPTY) {
2048 dev_dbg(hsotg->dev, "%s: ep%d: TxFIFOEmpty\n",
2050 if (!using_dma(hsotg))
2051 dwc2_hsotg_trytx(hsotg, hs_ep);
2057 * dwc2_hsotg_irq_enumdone - Handle EnumDone interrupt (enumeration done)
2058 * @hsotg: The device state.
2060 * Handle updating the device settings after the enumeration phase has
2063 static void dwc2_hsotg_irq_enumdone(struct dwc2_hsotg *hsotg)
2065 u32 dsts = dwc2_readl(hsotg->regs + DSTS);
2066 int ep0_mps = 0, ep_mps = 8;
2069 * This should signal the finish of the enumeration phase
2070 * of the USB handshaking, so we should now know what rate
2074 dev_dbg(hsotg->dev, "EnumDone (DSTS=0x%08x)\n", dsts);
2077 * note, since we're limited by the size of transfer on EP0, and
2078 * it seems IN transfers must be a even number of packets we do
2079 * not advertise a 64byte MPS on EP0.
2082 /* catch both EnumSpd_FS and EnumSpd_FS48 */
2083 switch (dsts & DSTS_ENUMSPD_MASK) {
2084 case DSTS_ENUMSPD_FS:
2085 case DSTS_ENUMSPD_FS48:
2086 hsotg->gadget.speed = USB_SPEED_FULL;
2087 ep0_mps = EP0_MPS_LIMIT;
2091 case DSTS_ENUMSPD_HS:
2092 hsotg->gadget.speed = USB_SPEED_HIGH;
2093 ep0_mps = EP0_MPS_LIMIT;
2097 case DSTS_ENUMSPD_LS:
2098 hsotg->gadget.speed = USB_SPEED_LOW;
2100 * note, we don't actually support LS in this driver at the
2101 * moment, and the documentation seems to imply that it isn't
2102 * supported by the PHYs on some of the devices.
2106 dev_info(hsotg->dev, "new device is %s\n",
2107 usb_speed_string(hsotg->gadget.speed));
2110 * we should now know the maximum packet size for an
2111 * endpoint, so set the endpoints to a default value.
2116 /* Initialize ep0 for both in and out directions */
2117 dwc2_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps, 1);
2118 dwc2_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps, 0);
2119 for (i = 1; i < hsotg->num_of_eps; i++) {
2120 if (hsotg->eps_in[i])
2121 dwc2_hsotg_set_ep_maxpacket(hsotg, i, ep_mps, 1);
2122 if (hsotg->eps_out[i])
2123 dwc2_hsotg_set_ep_maxpacket(hsotg, i, ep_mps, 0);
2127 /* ensure after enumeration our EP0 is active */
2129 dwc2_hsotg_enqueue_setup(hsotg);
2131 dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
2132 dwc2_readl(hsotg->regs + DIEPCTL0),
2133 dwc2_readl(hsotg->regs + DOEPCTL0));
2137 * kill_all_requests - remove all requests from the endpoint's queue
2138 * @hsotg: The device state.
2139 * @ep: The endpoint the requests may be on.
2140 * @result: The result code to use.
2142 * Go through the requests on the given endpoint and mark them
2143 * completed with the given result code.
2145 static void kill_all_requests(struct dwc2_hsotg *hsotg,
2146 struct dwc2_hsotg_ep *ep,
2149 struct dwc2_hsotg_req *req, *treq;
2154 list_for_each_entry_safe(req, treq, &ep->queue, queue)
2155 dwc2_hsotg_complete_request(hsotg, ep, req,
2158 if (!hsotg->dedicated_fifos)
2160 size = (dwc2_readl(hsotg->regs + DTXFSTS(ep->index)) & 0xffff) * 4;
2161 if (size < ep->fifo_size)
2162 dwc2_hsotg_txfifo_flush(hsotg, ep->fifo_index);
2166 * dwc2_hsotg_disconnect - disconnect service
2167 * @hsotg: The device state.
2169 * The device has been disconnected. Remove all current
2170 * transactions and signal the gadget driver that this
2173 void dwc2_hsotg_disconnect(struct dwc2_hsotg *hsotg)
2177 if (!hsotg->connected)
2180 hsotg->connected = 0;
2181 hsotg->test_mode = 0;
2183 for (ep = 0; ep < hsotg->num_of_eps; ep++) {
2184 if (hsotg->eps_in[ep])
2185 kill_all_requests(hsotg, hsotg->eps_in[ep],
2187 if (hsotg->eps_out[ep])
2188 kill_all_requests(hsotg, hsotg->eps_out[ep],
2192 call_gadget(hsotg, disconnect);
2193 hsotg->lx_state = DWC2_L3;
2197 * dwc2_hsotg_irq_fifoempty - TX FIFO empty interrupt handler
2198 * @hsotg: The device state:
2199 * @periodic: True if this is a periodic FIFO interrupt
2201 static void dwc2_hsotg_irq_fifoempty(struct dwc2_hsotg *hsotg, bool periodic)
2203 struct dwc2_hsotg_ep *ep;
2206 /* look through for any more data to transmit */
2207 for (epno = 0; epno < hsotg->num_of_eps; epno++) {
2208 ep = index_to_ep(hsotg, epno, 1);
2216 if ((periodic && !ep->periodic) ||
2217 (!periodic && ep->periodic))
2220 ret = dwc2_hsotg_trytx(hsotg, ep);
2226 /* IRQ flags which will trigger a retry around the IRQ loop */
2227 #define IRQ_RETRY_MASK (GINTSTS_NPTXFEMP | \
2232 * dwc2_hsotg_corereset - issue softreset to the core
2233 * @hsotg: The device state
2235 * Issue a soft reset to the core, and await the core finishing it.
2237 static int dwc2_hsotg_corereset(struct dwc2_hsotg *hsotg)
2242 dev_dbg(hsotg->dev, "resetting core\n");
2244 /* issue soft reset */
2245 dwc2_writel(GRSTCTL_CSFTRST, hsotg->regs + GRSTCTL);
2249 grstctl = dwc2_readl(hsotg->regs + GRSTCTL);
2250 } while ((grstctl & GRSTCTL_CSFTRST) && timeout-- > 0);
2252 if (grstctl & GRSTCTL_CSFTRST) {
2253 dev_err(hsotg->dev, "Failed to get CSftRst asserted\n");
2260 u32 grstctl = dwc2_readl(hsotg->regs + GRSTCTL);
2262 if (timeout-- < 0) {
2263 dev_info(hsotg->dev,
2264 "%s: reset failed, GRSTCTL=%08x\n",
2269 if (!(grstctl & GRSTCTL_AHBIDLE))
2272 break; /* reset done */
2275 dev_dbg(hsotg->dev, "reset successful\n");
2280 * dwc2_hsotg_core_init - issue softreset to the core
2281 * @hsotg: The device state
2283 * Issue a soft reset to the core, and await the core finishing it.
2285 void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
2291 if (dwc2_hsotg_corereset(hsotg))
2295 * we must now enable ep0 ready for host detection and then
2296 * set configuration.
2299 /* set the PLL on, remove the HNP/SRP and set the PHY */
2300 val = (hsotg->phyif == GUSBCFG_PHYIF8) ? 9 : 5;
2301 dwc2_writel(hsotg->phyif | GUSBCFG_TOUTCAL(7) |
2302 (val << GUSBCFG_USBTRDTIM_SHIFT), hsotg->regs + GUSBCFG);
2304 dwc2_hsotg_init_fifo(hsotg);
2307 __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON);
2309 dwc2_writel(DCFG_EPMISCNT(1) | DCFG_DEVSPD_HS, hsotg->regs + DCFG);
2311 /* Clear any pending OTG interrupts */
2312 dwc2_writel(0xffffffff, hsotg->regs + GOTGINT);
2314 /* Clear any pending interrupts */
2315 dwc2_writel(0xffffffff, hsotg->regs + GINTSTS);
2317 dwc2_writel(GINTSTS_ERLYSUSP | GINTSTS_SESSREQINT |
2318 GINTSTS_GOUTNAKEFF | GINTSTS_GINNAKEFF |
2319 GINTSTS_CONIDSTSCHNG | GINTSTS_USBRST |
2320 GINTSTS_RESETDET | GINTSTS_ENUMDONE |
2321 GINTSTS_OTGINT | GINTSTS_USBSUSP |
2323 hsotg->regs + GINTMSK);
2325 if (using_dma(hsotg))
2326 dwc2_writel(GAHBCFG_GLBL_INTR_EN | GAHBCFG_DMA_EN |
2327 (GAHBCFG_HBSTLEN_INCR4 << GAHBCFG_HBSTLEN_SHIFT),
2328 hsotg->regs + GAHBCFG);
2330 dwc2_writel(((hsotg->dedicated_fifos) ?
2331 (GAHBCFG_NP_TXF_EMP_LVL |
2332 GAHBCFG_P_TXF_EMP_LVL) : 0) |
2333 GAHBCFG_GLBL_INTR_EN, hsotg->regs + GAHBCFG);
2336 * If INTknTXFEmpMsk is enabled, it's important to disable ep interrupts
2337 * when we have no data to transfer. Otherwise we get being flooded by
2341 dwc2_writel(((hsotg->dedicated_fifos && !using_dma(hsotg)) ?
2342 DIEPMSK_TXFIFOEMPTY | DIEPMSK_INTKNTXFEMPMSK : 0) |
2343 DIEPMSK_EPDISBLDMSK | DIEPMSK_XFERCOMPLMSK |
2344 DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK |
2345 DIEPMSK_INTKNEPMISMSK,
2346 hsotg->regs + DIEPMSK);
2349 * don't need XferCompl, we get that from RXFIFO in slave mode. In
2350 * DMA mode we may need this.
2352 dwc2_writel((using_dma(hsotg) ? (DIEPMSK_XFERCOMPLMSK |
2353 DIEPMSK_TIMEOUTMSK) : 0) |
2354 DOEPMSK_EPDISBLDMSK | DOEPMSK_AHBERRMSK |
2356 hsotg->regs + DOEPMSK);
2358 dwc2_writel(0, hsotg->regs + DAINTMSK);
2360 dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
2361 dwc2_readl(hsotg->regs + DIEPCTL0),
2362 dwc2_readl(hsotg->regs + DOEPCTL0));
2364 /* enable in and out endpoint interrupts */
2365 dwc2_hsotg_en_gsint(hsotg, GINTSTS_OEPINT | GINTSTS_IEPINT);
2368 * Enable the RXFIFO when in slave mode, as this is how we collect
2369 * the data. In DMA mode, we get events from the FIFO but also
2370 * things we cannot process, so do not use it.
2372 if (!using_dma(hsotg))
2373 dwc2_hsotg_en_gsint(hsotg, GINTSTS_RXFLVL);
2375 /* Enable interrupts for EP0 in and out */
2376 dwc2_hsotg_ctrl_epint(hsotg, 0, 0, 1);
2377 dwc2_hsotg_ctrl_epint(hsotg, 0, 1, 1);
2379 if (!is_usb_reset) {
2380 __orr32(hsotg->regs + DCTL, DCTL_PWRONPRGDONE);
2381 udelay(10); /* see openiboot */
2382 __bic32(hsotg->regs + DCTL, DCTL_PWRONPRGDONE);
2385 dev_dbg(hsotg->dev, "DCTL=0x%08x\n", dwc2_readl(hsotg->regs + DCTL));
2388 * DxEPCTL_USBActEp says RO in manual, but seems to be set by
2389 * writing to the EPCTL register..
2392 /* set to read 1 8byte packet */
2393 dwc2_writel(DXEPTSIZ_MC(1) | DXEPTSIZ_PKTCNT(1) |
2394 DXEPTSIZ_XFERSIZE(8), hsotg->regs + DOEPTSIZ0);
2396 dwc2_writel(dwc2_hsotg_ep0_mps(hsotg->eps_out[0]->ep.maxpacket) |
2397 DXEPCTL_CNAK | DXEPCTL_EPENA |
2399 hsotg->regs + DOEPCTL0);
2401 /* enable, but don't activate EP0in */
2402 dwc2_writel(dwc2_hsotg_ep0_mps(hsotg->eps_out[0]->ep.maxpacket) |
2403 DXEPCTL_USBACTEP, hsotg->regs + DIEPCTL0);
2405 dwc2_hsotg_enqueue_setup(hsotg);
2407 dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
2408 dwc2_readl(hsotg->regs + DIEPCTL0),
2409 dwc2_readl(hsotg->regs + DOEPCTL0));
2411 /* clear global NAKs */
2412 val = DCTL_CGOUTNAK | DCTL_CGNPINNAK;
2414 val |= DCTL_SFTDISCON;
2415 __orr32(hsotg->regs + DCTL, val);
2417 /* must be at-least 3ms to allow bus to see disconnect */
2420 hsotg->last_rst = jiffies;
2421 hsotg->lx_state = DWC2_L0;
2424 static void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg)
2426 /* set the soft-disconnect bit */
2427 __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON);
2430 void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg)
2432 /* remove the soft-disconnect and let's go */
2433 __bic32(hsotg->regs + DCTL, DCTL_SFTDISCON);
2437 * dwc2_hsotg_irq - handle device interrupt
2438 * @irq: The IRQ number triggered
2439 * @pw: The pw value when registered the handler.
2441 static irqreturn_t dwc2_hsotg_irq(int irq, void *pw)
2443 struct dwc2_hsotg *hsotg = pw;
2444 int retry_count = 8;
2448 spin_lock(&hsotg->lock);
2450 gintsts = dwc2_readl(hsotg->regs + GINTSTS);
2451 gintmsk = dwc2_readl(hsotg->regs + GINTMSK);
2453 dev_dbg(hsotg->dev, "%s: %08x %08x (%08x) retry %d\n",
2454 __func__, gintsts, gintsts & gintmsk, gintmsk, retry_count);
2458 if (gintsts & GINTSTS_ENUMDONE) {
2459 dwc2_writel(GINTSTS_ENUMDONE, hsotg->regs + GINTSTS);
2461 dwc2_hsotg_irq_enumdone(hsotg);
2464 if (gintsts & (GINTSTS_OEPINT | GINTSTS_IEPINT)) {
2465 u32 daint = dwc2_readl(hsotg->regs + DAINT);
2466 u32 daintmsk = dwc2_readl(hsotg->regs + DAINTMSK);
2467 u32 daint_out, daint_in;
2471 daint_out = daint >> DAINT_OUTEP_SHIFT;
2472 daint_in = daint & ~(daint_out << DAINT_OUTEP_SHIFT);
2474 dev_dbg(hsotg->dev, "%s: daint=%08x\n", __func__, daint);
2476 for (ep = 0; ep < hsotg->num_of_eps && daint_out;
2477 ep++, daint_out >>= 1) {
2479 dwc2_hsotg_epint(hsotg, ep, 0);
2482 for (ep = 0; ep < hsotg->num_of_eps && daint_in;
2483 ep++, daint_in >>= 1) {
2485 dwc2_hsotg_epint(hsotg, ep, 1);
2489 if (gintsts & GINTSTS_RESETDET) {
2490 dev_dbg(hsotg->dev, "%s: USBRstDet\n", __func__);
2492 dwc2_writel(GINTSTS_RESETDET, hsotg->regs + GINTSTS);
2494 /* This event must be used only if controller is suspended */
2495 if (hsotg->lx_state == DWC2_L2) {
2496 dwc2_exit_hibernation(hsotg, true);
2497 hsotg->lx_state = DWC2_L0;
2501 if (gintsts & (GINTSTS_USBRST | GINTSTS_RESETDET)) {
2503 u32 usb_status = dwc2_readl(hsotg->regs + GOTGCTL);
2505 dev_dbg(hsotg->dev, "%s: USBRst\n", __func__);
2506 dev_dbg(hsotg->dev, "GNPTXSTS=%08x\n",
2507 dwc2_readl(hsotg->regs + GNPTXSTS));
2509 dwc2_writel(GINTSTS_USBRST, hsotg->regs + GINTSTS);
2511 /* Report disconnection if it is not already done. */
2512 dwc2_hsotg_disconnect(hsotg);
2514 if (usb_status & GOTGCTL_BSESVLD) {
2515 if (time_after(jiffies, hsotg->last_rst +
2516 msecs_to_jiffies(200))) {
2518 kill_all_requests(hsotg, hsotg->eps_out[0],
2521 dwc2_hsotg_core_init_disconnected(hsotg, true);
2526 /* check both FIFOs */
2528 if (gintsts & GINTSTS_NPTXFEMP) {
2529 dev_dbg(hsotg->dev, "NPTxFEmp\n");
2532 * Disable the interrupt to stop it happening again
2533 * unless one of these endpoint routines decides that
2534 * it needs re-enabling
2537 dwc2_hsotg_disable_gsint(hsotg, GINTSTS_NPTXFEMP);
2538 dwc2_hsotg_irq_fifoempty(hsotg, false);
2541 if (gintsts & GINTSTS_PTXFEMP) {
2542 dev_dbg(hsotg->dev, "PTxFEmp\n");
2544 /* See note in GINTSTS_NPTxFEmp */
2546 dwc2_hsotg_disable_gsint(hsotg, GINTSTS_PTXFEMP);
2547 dwc2_hsotg_irq_fifoempty(hsotg, true);
2550 if (gintsts & GINTSTS_RXFLVL) {
2552 * note, since GINTSTS_RxFLvl doubles as FIFO-not-empty,
2553 * we need to retry dwc2_hsotg_handle_rx if this is still
2557 dwc2_hsotg_handle_rx(hsotg);
2560 if (gintsts & GINTSTS_ERLYSUSP) {
2561 dev_dbg(hsotg->dev, "GINTSTS_ErlySusp\n");
2562 dwc2_writel(GINTSTS_ERLYSUSP, hsotg->regs + GINTSTS);
2566 * these next two seem to crop-up occasionally causing the core
2567 * to shutdown the USB transfer, so try clearing them and logging
2571 if (gintsts & GINTSTS_GOUTNAKEFF) {
2572 dev_info(hsotg->dev, "GOUTNakEff triggered\n");
2574 dwc2_writel(DCTL_CGOUTNAK, hsotg->regs + DCTL);
2576 dwc2_hsotg_dump(hsotg);
2579 if (gintsts & GINTSTS_GINNAKEFF) {
2580 dev_info(hsotg->dev, "GINNakEff triggered\n");
2582 dwc2_writel(DCTL_CGNPINNAK, hsotg->regs + DCTL);
2584 dwc2_hsotg_dump(hsotg);
2588 * if we've had fifo events, we should try and go around the
2589 * loop again to see if there's any point in returning yet.
2592 if (gintsts & IRQ_RETRY_MASK && --retry_count > 0)
2595 spin_unlock(&hsotg->lock);
2601 * dwc2_hsotg_ep_enable - enable the given endpoint
2602 * @ep: The USB endpint to configure
2603 * @desc: The USB endpoint descriptor to configure with.
2605 * This is called from the USB gadget code's usb_ep_enable().
2607 static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
2608 const struct usb_endpoint_descriptor *desc)
2610 struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
2611 struct dwc2_hsotg *hsotg = hs_ep->parent;
2612 unsigned long flags;
2613 unsigned int index = hs_ep->index;
2617 unsigned int dir_in;
2618 unsigned int i, val, size;
2622 "%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n",
2623 __func__, ep->name, desc->bEndpointAddress, desc->bmAttributes,
2624 desc->wMaxPacketSize, desc->bInterval);
2626 /* not to be called for EP0 */
2627 WARN_ON(index == 0);
2629 dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0;
2630 if (dir_in != hs_ep->dir_in) {
2631 dev_err(hsotg->dev, "%s: direction mismatch!\n", __func__);
2635 mps = usb_endpoint_maxp(desc);
2637 /* note, we handle this here instead of dwc2_hsotg_set_ep_maxpacket */
2639 epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
2640 epctrl = dwc2_readl(hsotg->regs + epctrl_reg);
2642 dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n",
2643 __func__, epctrl, epctrl_reg);
2645 spin_lock_irqsave(&hsotg->lock, flags);
2647 epctrl &= ~(DXEPCTL_EPTYPE_MASK | DXEPCTL_MPS_MASK);
2648 epctrl |= DXEPCTL_MPS(mps);
2651 * mark the endpoint as active, otherwise the core may ignore
2652 * transactions entirely for this endpoint
2654 epctrl |= DXEPCTL_USBACTEP;
2657 * set the NAK status on the endpoint, otherwise we might try and
2658 * do something with data that we've yet got a request to process
2659 * since the RXFIFO will take data for an endpoint even if the
2660 * size register hasn't been set.
2663 epctrl |= DXEPCTL_SNAK;
2665 /* update the endpoint state */
2666 dwc2_hsotg_set_ep_maxpacket(hsotg, hs_ep->index, mps, dir_in);
2668 /* default, set to non-periodic */
2669 hs_ep->isochronous = 0;
2670 hs_ep->periodic = 0;
2672 hs_ep->interval = desc->bInterval;
2674 if (hs_ep->interval > 1 && hs_ep->mc > 1)
2675 dev_err(hsotg->dev, "MC > 1 when interval is not 1\n");
2677 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
2678 case USB_ENDPOINT_XFER_ISOC:
2679 epctrl |= DXEPCTL_EPTYPE_ISO;
2680 epctrl |= DXEPCTL_SETEVENFR;
2681 hs_ep->isochronous = 1;
2683 hs_ep->periodic = 1;
2686 case USB_ENDPOINT_XFER_BULK:
2687 epctrl |= DXEPCTL_EPTYPE_BULK;
2690 case USB_ENDPOINT_XFER_INT:
2692 hs_ep->periodic = 1;
2694 epctrl |= DXEPCTL_EPTYPE_INTERRUPT;
2697 case USB_ENDPOINT_XFER_CONTROL:
2698 epctrl |= DXEPCTL_EPTYPE_CONTROL;
2702 /* If fifo is already allocated for this ep */
2703 if (hs_ep->fifo_index) {
2704 size = hs_ep->ep.maxpacket * hs_ep->mc;
2705 /* If bigger fifo is required deallocate current one */
2706 if (size > hs_ep->fifo_size) {
2707 hsotg->fifo_map &= ~(1 << hs_ep->fifo_index);
2708 hs_ep->fifo_index = 0;
2709 hs_ep->fifo_size = 0;
2714 * if the hardware has dedicated fifos, we must give each IN EP
2715 * a unique tx-fifo even if it is non-periodic.
2717 if (dir_in && hsotg->dedicated_fifos && !hs_ep->fifo_index) {
2719 u32 fifo_size = UINT_MAX;
2720 size = hs_ep->ep.maxpacket*hs_ep->mc;
2721 for (i = 1; i < hsotg->num_of_eps; ++i) {
2722 if (hsotg->fifo_map & (1<<i))
2724 val = dwc2_readl(hsotg->regs + DPTXFSIZN(i));
2725 val = (val >> FIFOSIZE_DEPTH_SHIFT)*4;
2728 /* Search for smallest acceptable fifo */
2729 if (val < fifo_size) {
2736 "%s: No suitable fifo found\n", __func__);
2740 hsotg->fifo_map |= 1 << fifo_index;
2741 epctrl |= DXEPCTL_TXFNUM(fifo_index);
2742 hs_ep->fifo_index = fifo_index;
2743 hs_ep->fifo_size = fifo_size;
2746 /* for non control endpoints, set PID to D0 */
2748 epctrl |= DXEPCTL_SETD0PID;
2750 dev_dbg(hsotg->dev, "%s: write DxEPCTL=0x%08x\n",
2753 dwc2_writel(epctrl, hsotg->regs + epctrl_reg);
2754 dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x\n",
2755 __func__, dwc2_readl(hsotg->regs + epctrl_reg));
2757 /* enable the endpoint interrupt */
2758 dwc2_hsotg_ctrl_epint(hsotg, index, dir_in, 1);
2761 spin_unlock_irqrestore(&hsotg->lock, flags);
2766 * dwc2_hsotg_ep_disable - disable given endpoint
2767 * @ep: The endpoint to disable.
2769 static int dwc2_hsotg_ep_disable(struct usb_ep *ep)
2771 struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
2772 struct dwc2_hsotg *hsotg = hs_ep->parent;
2773 int dir_in = hs_ep->dir_in;
2774 int index = hs_ep->index;
2775 unsigned long flags;
2779 dev_dbg(hsotg->dev, "%s(ep %p)\n", __func__, ep);
2781 if (ep == &hsotg->eps_out[0]->ep) {
2782 dev_err(hsotg->dev, "%s: called for ep0\n", __func__);
2786 epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
2788 spin_lock_irqsave(&hsotg->lock, flags);
2790 hsotg->fifo_map &= ~(1<<hs_ep->fifo_index);
2791 hs_ep->fifo_index = 0;
2792 hs_ep->fifo_size = 0;
2794 ctrl = dwc2_readl(hsotg->regs + epctrl_reg);
2795 ctrl &= ~DXEPCTL_EPENA;
2796 ctrl &= ~DXEPCTL_USBACTEP;
2797 ctrl |= DXEPCTL_SNAK;
2799 dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl);
2800 dwc2_writel(ctrl, hsotg->regs + epctrl_reg);
2802 /* disable endpoint interrupts */
2803 dwc2_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 0);
2805 /* terminate all requests with shutdown */
2806 kill_all_requests(hsotg, hs_ep, -ESHUTDOWN);
2808 spin_unlock_irqrestore(&hsotg->lock, flags);
2813 * on_list - check request is on the given endpoint
2814 * @ep: The endpoint to check.
2815 * @test: The request to test if it is on the endpoint.
2817 static bool on_list(struct dwc2_hsotg_ep *ep, struct dwc2_hsotg_req *test)
2819 struct dwc2_hsotg_req *req, *treq;
2821 list_for_each_entry_safe(req, treq, &ep->queue, queue) {
2830 * dwc2_hsotg_ep_dequeue - dequeue given endpoint
2831 * @ep: The endpoint to dequeue.
2832 * @req: The request to be removed from a queue.
2834 static int dwc2_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
2836 struct dwc2_hsotg_req *hs_req = our_req(req);
2837 struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
2838 struct dwc2_hsotg *hs = hs_ep->parent;
2839 unsigned long flags;
2841 dev_dbg(hs->dev, "ep_dequeue(%p,%p)\n", ep, req);
2843 spin_lock_irqsave(&hs->lock, flags);
2845 if (!on_list(hs_ep, hs_req)) {
2846 spin_unlock_irqrestore(&hs->lock, flags);
2850 dwc2_hsotg_complete_request(hs, hs_ep, hs_req, -ECONNRESET);
2851 spin_unlock_irqrestore(&hs->lock, flags);
2857 * dwc2_hsotg_ep_sethalt - set halt on a given endpoint
2858 * @ep: The endpoint to set halt.
2859 * @value: Set or unset the halt.
2861 static int dwc2_hsotg_ep_sethalt(struct usb_ep *ep, int value)
2863 struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
2864 struct dwc2_hsotg *hs = hs_ep->parent;
2865 int index = hs_ep->index;
2870 dev_info(hs->dev, "%s(ep %p %s, %d)\n", __func__, ep, ep->name, value);
2874 dwc2_hsotg_stall_ep0(hs);
2877 "%s: can't clear halt on ep0\n", __func__);
2881 if (hs_ep->dir_in) {
2882 epreg = DIEPCTL(index);
2883 epctl = dwc2_readl(hs->regs + epreg);
2886 epctl |= DXEPCTL_STALL | DXEPCTL_SNAK;
2887 if (epctl & DXEPCTL_EPENA)
2888 epctl |= DXEPCTL_EPDIS;
2890 epctl &= ~DXEPCTL_STALL;
2891 xfertype = epctl & DXEPCTL_EPTYPE_MASK;
2892 if (xfertype == DXEPCTL_EPTYPE_BULK ||
2893 xfertype == DXEPCTL_EPTYPE_INTERRUPT)
2894 epctl |= DXEPCTL_SETD0PID;
2896 dwc2_writel(epctl, hs->regs + epreg);
2899 epreg = DOEPCTL(index);
2900 epctl = dwc2_readl(hs->regs + epreg);
2903 epctl |= DXEPCTL_STALL;
2905 epctl &= ~DXEPCTL_STALL;
2906 xfertype = epctl & DXEPCTL_EPTYPE_MASK;
2907 if (xfertype == DXEPCTL_EPTYPE_BULK ||
2908 xfertype == DXEPCTL_EPTYPE_INTERRUPT)
2909 epctl |= DXEPCTL_SETD0PID;
2911 dwc2_writel(epctl, hs->regs + epreg);
2914 hs_ep->halted = value;
2920 * dwc2_hsotg_ep_sethalt_lock - set halt on a given endpoint with lock held
2921 * @ep: The endpoint to set halt.
2922 * @value: Set or unset the halt.
2924 static int dwc2_hsotg_ep_sethalt_lock(struct usb_ep *ep, int value)
2926 struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
2927 struct dwc2_hsotg *hs = hs_ep->parent;
2928 unsigned long flags = 0;
2931 spin_lock_irqsave(&hs->lock, flags);
2932 ret = dwc2_hsotg_ep_sethalt(ep, value);
2933 spin_unlock_irqrestore(&hs->lock, flags);
2938 static struct usb_ep_ops dwc2_hsotg_ep_ops = {
2939 .enable = dwc2_hsotg_ep_enable,
2940 .disable = dwc2_hsotg_ep_disable,
2941 .alloc_request = dwc2_hsotg_ep_alloc_request,
2942 .free_request = dwc2_hsotg_ep_free_request,
2943 .queue = dwc2_hsotg_ep_queue_lock,
2944 .dequeue = dwc2_hsotg_ep_dequeue,
2945 .set_halt = dwc2_hsotg_ep_sethalt_lock,
2946 /* note, don't believe we have any call for the fifo routines */
2950 * dwc2_hsotg_phy_enable - enable platform phy dev
2951 * @hsotg: The driver state
2953 * A wrapper for platform code responsible for controlling
2954 * low-level USB code
2956 static void dwc2_hsotg_phy_enable(struct dwc2_hsotg *hsotg)
2958 struct platform_device *pdev = to_platform_device(hsotg->dev);
2960 dev_dbg(hsotg->dev, "pdev 0x%p\n", pdev);
2963 usb_phy_init(hsotg->uphy);
2964 else if (hsotg->plat && hsotg->plat->phy_init)
2965 hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
2967 phy_init(hsotg->phy);
2968 phy_power_on(hsotg->phy);
2973 * dwc2_hsotg_phy_disable - disable platform phy dev
2974 * @hsotg: The driver state
2976 * A wrapper for platform code responsible for controlling
2977 * low-level USB code
2979 static void dwc2_hsotg_phy_disable(struct dwc2_hsotg *hsotg)
2981 struct platform_device *pdev = to_platform_device(hsotg->dev);
2984 usb_phy_shutdown(hsotg->uphy);
2985 else if (hsotg->plat && hsotg->plat->phy_exit)
2986 hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);
2988 phy_power_off(hsotg->phy);
2989 phy_exit(hsotg->phy);
2994 * dwc2_hsotg_init - initalize the usb core
2995 * @hsotg: The driver state
2997 static void dwc2_hsotg_init(struct dwc2_hsotg *hsotg)
3000 /* unmask subset of endpoint interrupts */
3002 dwc2_writel(DIEPMSK_TIMEOUTMSK | DIEPMSK_AHBERRMSK |
3003 DIEPMSK_EPDISBLDMSK | DIEPMSK_XFERCOMPLMSK,
3004 hsotg->regs + DIEPMSK);
3006 dwc2_writel(DOEPMSK_SETUPMSK | DOEPMSK_AHBERRMSK |
3007 DOEPMSK_EPDISBLDMSK | DOEPMSK_XFERCOMPLMSK,
3008 hsotg->regs + DOEPMSK);
3010 dwc2_writel(0, hsotg->regs + DAINTMSK);
3012 /* Be in disconnected state until gadget is registered */
3013 __orr32(hsotg->regs + DCTL, DCTL_SFTDISCON);
3017 dev_dbg(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n",
3018 dwc2_readl(hsotg->regs + GRXFSIZ),
3019 dwc2_readl(hsotg->regs + GNPTXFSIZ));
3021 dwc2_hsotg_init_fifo(hsotg);
3023 /* set the PLL on, remove the HNP/SRP and set the PHY */
3024 trdtim = (hsotg->phyif == GUSBCFG_PHYIF8) ? 9 : 5;
3025 dwc2_writel(hsotg->phyif | GUSBCFG_TOUTCAL(7) |
3026 (trdtim << GUSBCFG_USBTRDTIM_SHIFT),
3027 hsotg->regs + GUSBCFG);
3029 if (using_dma(hsotg))
3030 __orr32(hsotg->regs + GAHBCFG, GAHBCFG_DMA_EN);
3034 * dwc2_hsotg_udc_start - prepare the udc for work
3035 * @gadget: The usb gadget state
3036 * @driver: The usb gadget driver
3038 * Perform initialization to prepare udc device and driver
3041 static int dwc2_hsotg_udc_start(struct usb_gadget *gadget,
3042 struct usb_gadget_driver *driver)
3044 struct dwc2_hsotg *hsotg = to_hsotg(gadget);
3045 unsigned long flags;
3049 pr_err("%s: called with no device\n", __func__);
3054 dev_err(hsotg->dev, "%s: no driver\n", __func__);
3058 if (driver->max_speed < USB_SPEED_FULL)
3059 dev_err(hsotg->dev, "%s: bad speed\n", __func__);
3061 if (!driver->setup) {
3062 dev_err(hsotg->dev, "%s: missing entry points\n", __func__);
3066 mutex_lock(&hsotg->init_mutex);
3067 WARN_ON(hsotg->driver);
3069 driver->driver.bus = NULL;
3070 hsotg->driver = driver;
3071 hsotg->gadget.dev.of_node = hsotg->dev->of_node;
3072 hsotg->gadget.speed = USB_SPEED_UNKNOWN;
3074 clk_enable(hsotg->clk);
3076 ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
3079 dev_err(hsotg->dev, "failed to enable supplies: %d\n", ret);
3083 dwc2_hsotg_phy_enable(hsotg);
3084 if (!IS_ERR_OR_NULL(hsotg->uphy))
3085 otg_set_peripheral(hsotg->uphy->otg, &hsotg->gadget);
3087 spin_lock_irqsave(&hsotg->lock, flags);
3088 dwc2_hsotg_init(hsotg);
3089 dwc2_hsotg_core_init_disconnected(hsotg, false);
3091 spin_unlock_irqrestore(&hsotg->lock, flags);
3093 dev_info(hsotg->dev, "bound driver %s\n", driver->driver.name);
3095 mutex_unlock(&hsotg->init_mutex);
3100 mutex_unlock(&hsotg->init_mutex);
3101 hsotg->driver = NULL;
3106 * dwc2_hsotg_udc_stop - stop the udc
3107 * @gadget: The usb gadget state
3108 * @driver: The usb gadget driver
3110 * Stop udc hw block and stay tunned for future transmissions
3112 static int dwc2_hsotg_udc_stop(struct usb_gadget *gadget)
3114 struct dwc2_hsotg *hsotg = to_hsotg(gadget);
3115 unsigned long flags = 0;
3121 mutex_lock(&hsotg->init_mutex);
3123 /* all endpoints should be shutdown */
3124 for (ep = 1; ep < hsotg->num_of_eps; ep++) {
3125 if (hsotg->eps_in[ep])
3126 dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep);
3127 if (hsotg->eps_out[ep])
3128 dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep);
3131 spin_lock_irqsave(&hsotg->lock, flags);
3133 hsotg->driver = NULL;
3134 hsotg->gadget.speed = USB_SPEED_UNKNOWN;
3137 spin_unlock_irqrestore(&hsotg->lock, flags);
3139 if (!IS_ERR_OR_NULL(hsotg->uphy))
3140 otg_set_peripheral(hsotg->uphy->otg, NULL);
3141 dwc2_hsotg_phy_disable(hsotg);
3143 regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies), hsotg->supplies);
3145 clk_disable(hsotg->clk);
3147 mutex_unlock(&hsotg->init_mutex);
3153 * dwc2_hsotg_gadget_getframe - read the frame number
3154 * @gadget: The usb gadget state
3156 * Read the {micro} frame number
3158 static int dwc2_hsotg_gadget_getframe(struct usb_gadget *gadget)
3160 return dwc2_hsotg_read_frameno(to_hsotg(gadget));
3164 * dwc2_hsotg_pullup - connect/disconnect the USB PHY
3165 * @gadget: The usb gadget state
3166 * @is_on: Current state of the USB PHY
3168 * Connect/Disconnect the USB PHY pullup
3170 static int dwc2_hsotg_pullup(struct usb_gadget *gadget, int is_on)
3172 struct dwc2_hsotg *hsotg = to_hsotg(gadget);
3173 unsigned long flags = 0;
3175 dev_dbg(hsotg->dev, "%s: is_on: %d op_state: %d\n", __func__, is_on,
3178 /* Don't modify pullup state while in host mode */
3179 if (hsotg->op_state != OTG_STATE_B_PERIPHERAL) {
3180 hsotg->enabled = is_on;
3184 mutex_lock(&hsotg->init_mutex);
3185 spin_lock_irqsave(&hsotg->lock, flags);
3187 clk_enable(hsotg->clk);
3189 dwc2_hsotg_core_init_disconnected(hsotg, false);
3190 dwc2_hsotg_core_connect(hsotg);
3192 dwc2_hsotg_core_disconnect(hsotg);
3193 dwc2_hsotg_disconnect(hsotg);
3195 clk_disable(hsotg->clk);
3198 hsotg->gadget.speed = USB_SPEED_UNKNOWN;
3199 spin_unlock_irqrestore(&hsotg->lock, flags);
3200 mutex_unlock(&hsotg->init_mutex);
3205 static int dwc2_hsotg_vbus_session(struct usb_gadget *gadget, int is_active)
3207 struct dwc2_hsotg *hsotg = to_hsotg(gadget);
3208 unsigned long flags;
3210 dev_dbg(hsotg->dev, "%s: is_active: %d\n", __func__, is_active);
3211 spin_lock_irqsave(&hsotg->lock, flags);
3214 hsotg->op_state = OTG_STATE_B_PERIPHERAL;
3216 * If controller is hibernated, it must exit from hibernation
3217 * before being initialized
3219 if (hsotg->lx_state == DWC2_L2)
3220 dwc2_exit_hibernation(hsotg, false);
3222 /* Kill any ep0 requests as controller will be reinitialized */
3223 kill_all_requests(hsotg, hsotg->eps_out[0], -ECONNRESET);
3224 dwc2_hsotg_core_init_disconnected(hsotg, false);
3226 dwc2_hsotg_core_connect(hsotg);
3228 dwc2_hsotg_core_disconnect(hsotg);
3229 dwc2_hsotg_disconnect(hsotg);
3232 spin_unlock_irqrestore(&hsotg->lock, flags);
3237 * dwc2_hsotg_vbus_draw - report bMaxPower field
3238 * @gadget: The usb gadget state
3239 * @mA: Amount of current
3241 * Report how much power the device may consume to the phy.
3243 static int dwc2_hsotg_vbus_draw(struct usb_gadget *gadget, unsigned mA)
3245 struct dwc2_hsotg *hsotg = to_hsotg(gadget);
3247 if (IS_ERR_OR_NULL(hsotg->uphy))
3249 return usb_phy_set_power(hsotg->uphy, mA);
3252 static const struct usb_gadget_ops dwc2_hsotg_gadget_ops = {
3253 .get_frame = dwc2_hsotg_gadget_getframe,
3254 .udc_start = dwc2_hsotg_udc_start,
3255 .udc_stop = dwc2_hsotg_udc_stop,
3256 .pullup = dwc2_hsotg_pullup,
3257 .vbus_session = dwc2_hsotg_vbus_session,
3258 .vbus_draw = dwc2_hsotg_vbus_draw,
3262 * dwc2_hsotg_initep - initialise a single endpoint
3263 * @hsotg: The device state.
3264 * @hs_ep: The endpoint to be initialised.
3265 * @epnum: The endpoint number
3267 * Initialise the given endpoint (as part of the probe and device state
3268 * creation) to give to the gadget driver. Setup the endpoint name, any
3269 * direction information and other state that may be required.
3271 static void dwc2_hsotg_initep(struct dwc2_hsotg *hsotg,
3272 struct dwc2_hsotg_ep *hs_ep,
3285 hs_ep->dir_in = dir_in;
3286 hs_ep->index = epnum;
3288 snprintf(hs_ep->name, sizeof(hs_ep->name), "ep%d%s", epnum, dir);
3290 INIT_LIST_HEAD(&hs_ep->queue);
3291 INIT_LIST_HEAD(&hs_ep->ep.ep_list);
3293 /* add to the list of endpoints known by the gadget driver */
3295 list_add_tail(&hs_ep->ep.ep_list, &hsotg->gadget.ep_list);
3297 hs_ep->parent = hsotg;
3298 hs_ep->ep.name = hs_ep->name;
3299 usb_ep_set_maxpacket_limit(&hs_ep->ep, epnum ? 1024 : EP0_MPS_LIMIT);
3300 hs_ep->ep.ops = &dwc2_hsotg_ep_ops;
3303 hs_ep->ep.caps.type_control = true;
3305 hs_ep->ep.caps.type_iso = true;
3306 hs_ep->ep.caps.type_bulk = true;
3307 hs_ep->ep.caps.type_int = true;
3311 hs_ep->ep.caps.dir_in = true;
3313 hs_ep->ep.caps.dir_out = true;
3316 * if we're using dma, we need to set the next-endpoint pointer
3317 * to be something valid.
3320 if (using_dma(hsotg)) {
3321 u32 next = DXEPCTL_NEXTEP((epnum + 1) % 15);
3323 dwc2_writel(next, hsotg->regs + DIEPCTL(epnum));
3325 dwc2_writel(next, hsotg->regs + DOEPCTL(epnum));
3330 * dwc2_hsotg_hw_cfg - read HW configuration registers
3331 * @param: The device state
3333 * Read the USB core HW configuration registers
3335 static int dwc2_hsotg_hw_cfg(struct dwc2_hsotg *hsotg)
3341 /* check hardware configuration */
3343 cfg = dwc2_readl(hsotg->regs + GHWCFG2);
3344 hsotg->num_of_eps = (cfg >> GHWCFG2_NUM_DEV_EP_SHIFT) & 0xF;
3346 hsotg->num_of_eps++;
3348 hsotg->eps_in[0] = devm_kzalloc(hsotg->dev, sizeof(struct dwc2_hsotg_ep),
3350 if (!hsotg->eps_in[0])
3352 /* Same dwc2_hsotg_ep is used in both directions for ep0 */
3353 hsotg->eps_out[0] = hsotg->eps_in[0];
3355 cfg = dwc2_readl(hsotg->regs + GHWCFG1);
3356 for (i = 1, cfg >>= 2; i < hsotg->num_of_eps; i++, cfg >>= 2) {
3358 /* Direction in or both */
3359 if (!(ep_type & 2)) {
3360 hsotg->eps_in[i] = devm_kzalloc(hsotg->dev,
3361 sizeof(struct dwc2_hsotg_ep), GFP_KERNEL);
3362 if (!hsotg->eps_in[i])
3365 /* Direction out or both */
3366 if (!(ep_type & 1)) {
3367 hsotg->eps_out[i] = devm_kzalloc(hsotg->dev,
3368 sizeof(struct dwc2_hsotg_ep), GFP_KERNEL);
3369 if (!hsotg->eps_out[i])
3374 cfg = dwc2_readl(hsotg->regs + GHWCFG3);
3375 hsotg->fifo_mem = (cfg >> GHWCFG3_DFIFO_DEPTH_SHIFT);
3377 cfg = dwc2_readl(hsotg->regs + GHWCFG4);
3378 hsotg->dedicated_fifos = (cfg >> GHWCFG4_DED_FIFO_SHIFT) & 1;
3380 dev_info(hsotg->dev, "EPs: %d, %s fifos, %d entries in SPRAM\n",
3382 hsotg->dedicated_fifos ? "dedicated" : "shared",
3388 * dwc2_hsotg_dump - dump state of the udc
3389 * @param: The device state
3391 static void dwc2_hsotg_dump(struct dwc2_hsotg *hsotg)
3394 struct device *dev = hsotg->dev;
3395 void __iomem *regs = hsotg->regs;
3399 dev_info(dev, "DCFG=0x%08x, DCTL=0x%08x, DIEPMSK=%08x\n",
3400 dwc2_readl(regs + DCFG), dwc2_readl(regs + DCTL),
3401 dwc2_readl(regs + DIEPMSK));
3403 dev_info(dev, "GAHBCFG=0x%08x, GHWCFG1=0x%08x\n",
3404 dwc2_readl(regs + GAHBCFG), dwc2_readl(regs + GHWCFG1));
3406 dev_info(dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n",
3407 dwc2_readl(regs + GRXFSIZ), dwc2_readl(regs + GNPTXFSIZ));
3409 /* show periodic fifo settings */
3411 for (idx = 1; idx < hsotg->num_of_eps; idx++) {
3412 val = dwc2_readl(regs + DPTXFSIZN(idx));
3413 dev_info(dev, "DPTx[%d] FSize=%d, StAddr=0x%08x\n", idx,
3414 val >> FIFOSIZE_DEPTH_SHIFT,
3415 val & FIFOSIZE_STARTADDR_MASK);
3418 for (idx = 0; idx < hsotg->num_of_eps; idx++) {
3420 "ep%d-in: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", idx,
3421 dwc2_readl(regs + DIEPCTL(idx)),
3422 dwc2_readl(regs + DIEPTSIZ(idx)),
3423 dwc2_readl(regs + DIEPDMA(idx)));
3425 val = dwc2_readl(regs + DOEPCTL(idx));
3427 "ep%d-out: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n",
3428 idx, dwc2_readl(regs + DOEPCTL(idx)),
3429 dwc2_readl(regs + DOEPTSIZ(idx)),
3430 dwc2_readl(regs + DOEPDMA(idx)));
3434 dev_info(dev, "DVBUSDIS=0x%08x, DVBUSPULSE=%08x\n",
3435 dwc2_readl(regs + DVBUSDIS), dwc2_readl(regs + DVBUSPULSE));
3440 static void dwc2_hsotg_of_probe(struct dwc2_hsotg *hsotg)
3442 struct device_node *np = hsotg->dev->of_node;
3446 /* Enable dma if requested in device tree */
3447 hsotg->g_using_dma = of_property_read_bool(np, "g-use-dma");
3450 * Register TX periodic fifo size per endpoint.
3451 * EP0 is excluded since it has no fifo configuration.
3453 if (!of_find_property(np, "g-tx-fifo-size", &len))
3458 /* Read tx fifo sizes other than ep0 */
3459 if (of_property_read_u32_array(np, "g-tx-fifo-size",
3460 &hsotg->g_tx_fifo_sz[1], len))
3466 /* Make remaining TX fifos unavailable */
3467 if (len < MAX_EPS_CHANNELS) {
3468 for (i = len; i < MAX_EPS_CHANNELS; i++)
3469 hsotg->g_tx_fifo_sz[i] = 0;
3473 /* Register RX fifo size */
3474 of_property_read_u32(np, "g-rx-fifo-size", &hsotg->g_rx_fifo_sz);
3476 /* Register NPTX fifo size */
3477 of_property_read_u32(np, "g-np-tx-fifo-size",
3478 &hsotg->g_np_g_tx_fifo_sz);
3481 static inline void dwc2_hsotg_of_probe(struct dwc2_hsotg *hsotg) { }
3485 * dwc2_gadget_init - init function for gadget
3486 * @dwc2: The data structure for the DWC2 driver.
3487 * @irq: The IRQ number for the controller.
3489 int dwc2_gadget_init(struct dwc2_hsotg *hsotg, int irq)
3491 struct device *dev = hsotg->dev;
3492 struct dwc2_hsotg_plat *plat = dev->platform_data;
3496 u32 p_tx_fifo[] = DWC2_G_P_LEGACY_TX_FIFO_SIZE;
3498 /* Set default UTMI width */
3499 hsotg->phyif = GUSBCFG_PHYIF16;
3501 dwc2_hsotg_of_probe(hsotg);
3503 /* Initialize to legacy fifo configuration values */
3504 hsotg->g_rx_fifo_sz = 2048;
3505 hsotg->g_np_g_tx_fifo_sz = 1024;
3506 memcpy(&hsotg->g_tx_fifo_sz[1], p_tx_fifo, sizeof(p_tx_fifo));
3507 /* Device tree specific probe */
3508 dwc2_hsotg_of_probe(hsotg);
3509 /* Dump fifo information */
3510 dev_dbg(dev, "NonPeriodic TXFIFO size: %d\n",
3511 hsotg->g_np_g_tx_fifo_sz);
3512 dev_dbg(dev, "RXFIFO size: %d\n", hsotg->g_rx_fifo_sz);
3513 for (i = 0; i < MAX_EPS_CHANNELS; i++)
3514 dev_dbg(dev, "Periodic TXFIFO%2d size: %d\n", i,
3515 hsotg->g_tx_fifo_sz[i]);
3517 * If platform probe couldn't find a generic PHY or an old style
3518 * USB PHY, fall back to pdata
3520 if (IS_ERR_OR_NULL(hsotg->phy) && IS_ERR_OR_NULL(hsotg->uphy)) {
3521 plat = dev_get_platdata(dev);
3524 "no platform data or transceiver defined\n");
3525 return -EPROBE_DEFER;
3528 } else if (hsotg->phy) {
3530 * If using the generic PHY framework, check if the PHY bus
3531 * width is 8-bit and set the phyif appropriately.
3533 if (phy_get_bus_width(hsotg->phy) == 8)
3534 hsotg->phyif = GUSBCFG_PHYIF8;
3537 hsotg->clk = devm_clk_get(dev, "otg");
3538 if (IS_ERR(hsotg->clk)) {
3540 dev_dbg(dev, "cannot get otg clock\n");
3543 hsotg->gadget.max_speed = USB_SPEED_HIGH;
3544 hsotg->gadget.ops = &dwc2_hsotg_gadget_ops;
3545 hsotg->gadget.name = dev_name(dev);
3546 if (hsotg->dr_mode == USB_DR_MODE_OTG)
3547 hsotg->gadget.is_otg = 1;
3548 else if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL)
3549 hsotg->op_state = OTG_STATE_B_PERIPHERAL;
3551 /* reset the system */
3553 ret = clk_prepare_enable(hsotg->clk);
3555 dev_err(dev, "failed to enable otg clk\n");
3562 for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)
3563 hsotg->supplies[i].supply = dwc2_hsotg_supply_names[i];
3565 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hsotg->supplies),
3568 dev_err(dev, "failed to request supplies: %d\n", ret);
3572 ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
3576 dev_err(dev, "failed to enable supplies: %d\n", ret);
3580 /* usb phy enable */
3581 dwc2_hsotg_phy_enable(hsotg);
3584 * Force Device mode before initialization.
3585 * This allows correctly configuring fifo for device mode.
3587 __bic32(hsotg->regs + GUSBCFG, GUSBCFG_FORCEHOSTMODE);
3588 __orr32(hsotg->regs + GUSBCFG, GUSBCFG_FORCEDEVMODE);
3591 * According to Synopsys databook, this sleep is needed for the force
3592 * device mode to take effect.
3596 dwc2_hsotg_corereset(hsotg);
3597 ret = dwc2_hsotg_hw_cfg(hsotg);
3599 dev_err(hsotg->dev, "Hardware configuration failed: %d\n", ret);
3603 dwc2_hsotg_init(hsotg);
3605 /* Switch back to default configuration */
3606 __bic32(hsotg->regs + GUSBCFG, GUSBCFG_FORCEDEVMODE);
3608 hsotg->ctrl_buff = devm_kzalloc(hsotg->dev,
3609 DWC2_CTRL_BUFF_SIZE, GFP_KERNEL);
3610 if (!hsotg->ctrl_buff) {
3611 dev_err(dev, "failed to allocate ctrl request buff\n");
3616 hsotg->ep0_buff = devm_kzalloc(hsotg->dev,
3617 DWC2_CTRL_BUFF_SIZE, GFP_KERNEL);
3618 if (!hsotg->ep0_buff) {
3619 dev_err(dev, "failed to allocate ctrl reply buff\n");
3624 ret = devm_request_irq(hsotg->dev, irq, dwc2_hsotg_irq, IRQF_SHARED,
3625 dev_name(hsotg->dev), hsotg);
3627 dwc2_hsotg_phy_disable(hsotg);
3628 clk_disable_unprepare(hsotg->clk);
3629 regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
3631 dev_err(dev, "cannot claim IRQ for gadget\n");
3635 /* hsotg->num_of_eps holds number of EPs other than ep0 */
3637 if (hsotg->num_of_eps == 0) {
3638 dev_err(dev, "wrong number of EPs (zero)\n");
3643 /* setup endpoint information */
3645 INIT_LIST_HEAD(&hsotg->gadget.ep_list);
3646 hsotg->gadget.ep0 = &hsotg->eps_out[0]->ep;
3648 /* allocate EP0 request */
3650 hsotg->ctrl_req = dwc2_hsotg_ep_alloc_request(&hsotg->eps_out[0]->ep,
3652 if (!hsotg->ctrl_req) {
3653 dev_err(dev, "failed to allocate ctrl req\n");
3658 /* initialise the endpoints now the core has been initialised */
3659 for (epnum = 0; epnum < hsotg->num_of_eps; epnum++) {
3660 if (hsotg->eps_in[epnum])
3661 dwc2_hsotg_initep(hsotg, hsotg->eps_in[epnum],
3663 if (hsotg->eps_out[epnum])
3664 dwc2_hsotg_initep(hsotg, hsotg->eps_out[epnum],
3668 /* disable power and clock */
3669 dwc2_hsotg_phy_disable(hsotg);
3671 ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
3674 dev_err(dev, "failed to disable supplies: %d\n", ret);
3678 ret = usb_add_gadget_udc(dev, &hsotg->gadget);
3682 dwc2_hsotg_dump(hsotg);
3687 dwc2_hsotg_phy_disable(hsotg);
3689 clk_disable_unprepare(hsotg->clk);
3695 * dwc2_hsotg_remove - remove function for hsotg driver
3696 * @pdev: The platform information for the driver
3698 int dwc2_hsotg_remove(struct dwc2_hsotg *hsotg)
3700 usb_del_gadget_udc(&hsotg->gadget);
3701 clk_disable_unprepare(hsotg->clk);
3706 int dwc2_hsotg_suspend(struct dwc2_hsotg *hsotg)
3708 unsigned long flags;
3711 if (hsotg->lx_state != DWC2_L0)
3714 mutex_lock(&hsotg->init_mutex);
3716 if (hsotg->driver) {
3719 dev_info(hsotg->dev, "suspending usb gadget %s\n",
3720 hsotg->driver->driver.name);
3722 spin_lock_irqsave(&hsotg->lock, flags);
3724 dwc2_hsotg_core_disconnect(hsotg);
3725 dwc2_hsotg_disconnect(hsotg);
3726 hsotg->gadget.speed = USB_SPEED_UNKNOWN;
3727 spin_unlock_irqrestore(&hsotg->lock, flags);
3729 dwc2_hsotg_phy_disable(hsotg);
3731 for (ep = 0; ep < hsotg->num_of_eps; ep++) {
3732 if (hsotg->eps_in[ep])
3733 dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep);
3734 if (hsotg->eps_out[ep])
3735 dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep);
3738 ret = regulator_bulk_disable(ARRAY_SIZE(hsotg->supplies),
3740 clk_disable(hsotg->clk);
3743 mutex_unlock(&hsotg->init_mutex);
3748 int dwc2_hsotg_resume(struct dwc2_hsotg *hsotg)
3750 unsigned long flags;
3753 if (hsotg->lx_state == DWC2_L2)
3756 mutex_lock(&hsotg->init_mutex);
3758 if (hsotg->driver) {
3759 dev_info(hsotg->dev, "resuming usb gadget %s\n",
3760 hsotg->driver->driver.name);
3762 clk_enable(hsotg->clk);
3763 ret = regulator_bulk_enable(ARRAY_SIZE(hsotg->supplies),
3766 dwc2_hsotg_phy_enable(hsotg);
3768 spin_lock_irqsave(&hsotg->lock, flags);
3769 dwc2_hsotg_core_init_disconnected(hsotg, false);
3771 dwc2_hsotg_core_connect(hsotg);
3772 spin_unlock_irqrestore(&hsotg->lock, flags);
3774 mutex_unlock(&hsotg->init_mutex);