2 * Toshiba TC86C001 ("Goku-S") USB Device Controller driver
4 * Copyright (C) 2000-2002 Lineo
5 * by Stuart Lynne, Tom Rushworth, and Bruce Balden
6 * Copyright (C) 2002 Toshiba Corporation
7 * Copyright (C) 2003 MontaVista Software (source@mvista.com)
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
15 * This device has ep0 and three semi-configurable bulk/interrupt endpoints.
17 * - Endpoint numbering is fixed: ep{1,2,3}-bulk
18 * - Gadget drivers can choose ep maxpacket (8/16/32/64)
19 * - Gadget drivers can choose direction (IN, OUT)
20 * - DMA works with ep1 (OUT transfers) and ep2 (IN transfers).
24 // #define VERBOSE /* extra debug messages (success too) */
25 // #define USB_TRACE /* packet-level success messages */
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/pci.h>
30 #include <linux/delay.h>
31 #include <linux/ioport.h>
32 #include <linux/slab.h>
33 #include <linux/errno.h>
34 #include <linux/init.h>
35 #include <linux/timer.h>
36 #include <linux/list.h>
37 #include <linux/interrupt.h>
38 #include <linux/proc_fs.h>
39 #include <linux/device.h>
40 #include <linux/usb/ch9.h>
41 #include <linux/usb_gadget.h>
43 #include <asm/byteorder.h>
46 #include <asm/system.h>
47 #include <asm/unaligned.h>
52 #define DRIVER_DESC "TC86C001 USB Device Controller"
53 #define DRIVER_VERSION "30-Oct 2003"
55 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
57 static const char driver_name [] = "goku_udc";
58 static const char driver_desc [] = DRIVER_DESC;
60 MODULE_AUTHOR("source@mvista.com");
61 MODULE_DESCRIPTION(DRIVER_DESC);
62 MODULE_LICENSE("GPL");
66 * IN dma behaves ok under testing, though the IN-dma abort paths don't
67 * seem to behave quite as expected. Used by default.
69 * OUT dma documents design problems handling the common "short packet"
70 * transfer termination policy; it couldn't be enabled by default, even
71 * if the OUT-dma abort problems had a resolution.
73 static unsigned use_dma = 1;
76 //#include <linux/moduleparam.h>
77 /* "modprobe goku_udc use_dma=1" etc
79 * 1 to use IN dma only (normal operation)
80 * 2 to use IN and OUT dma
82 module_param(use_dma, uint, S_IRUGO);
85 /*-------------------------------------------------------------------------*/
87 static void nuke(struct goku_ep *, int status);
90 command(struct goku_udc_regs __iomem *regs, int command, unsigned epnum)
92 writel(COMMAND_EP(epnum) | command, ®s->Command);
97 goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
105 ep = container_of(_ep, struct goku_ep, ep);
106 if (!_ep || !desc || ep->desc
107 || desc->bDescriptorType != USB_DT_ENDPOINT)
110 if (ep == &dev->ep[0])
112 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
114 if (ep->num != (desc->bEndpointAddress & 0x0f))
117 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
118 case USB_ENDPOINT_XFER_BULK:
119 case USB_ENDPOINT_XFER_INT:
125 if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK)
126 != EPxSTATUS_EP_INVALID)
129 /* enabling the no-toggle interrupt mode would need an api hook */
131 max = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
141 mode |= 2 << 1; /* bulk, or intr-with-toggle */
143 /* ep1/ep2 dma direction is chosen early; it works in the other
144 * direction, with pio. be cautious with out-dma.
146 ep->is_in = (USB_DIR_IN & desc->bEndpointAddress) != 0;
149 ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT);
151 ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT);
153 DBG(dev, "%s out-dma hides short packets\n",
157 spin_lock_irqsave(&ep->dev->lock, flags);
159 /* ep1 and ep2 can do double buffering and/or dma */
161 struct goku_udc_regs __iomem *regs = ep->dev->regs;
164 /* double buffer except (for now) with pio in */
165 tmp = ((ep->dma || !ep->is_in)
166 ? 0x10 /* double buffered */
167 : 0x11 /* single buffer */
169 tmp |= readl(®s->EPxSingle);
170 writel(tmp, ®s->EPxSingle);
172 tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num;
173 tmp |= readl(®s->EPxBCS);
174 writel(tmp, ®s->EPxBCS);
176 writel(mode, ep->reg_mode);
177 command(ep->dev->regs, COMMAND_RESET, ep->num);
178 ep->ep.maxpacket = max;
181 spin_unlock_irqrestore(&ep->dev->lock, flags);
183 DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name,
184 ep->is_in ? "IN" : "OUT",
185 ep->dma ? "dma" : "pio",
191 static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep)
193 struct goku_udc *dev = ep->dev;
196 command(regs, COMMAND_INVALID, ep->num);
198 if (ep->num == UDC_MSTWR_ENDPOINT)
199 dev->int_enable &= ~(INT_MSTWREND
201 else if (ep->num == UDC_MSTRD_ENDPOINT)
202 dev->int_enable &= ~INT_MSTRDEND;
203 dev->int_enable &= ~INT_EPxDATASET (ep->num);
205 dev->int_enable &= ~INT_EP0;
206 writel(dev->int_enable, ®s->int_enable);
207 readl(®s->int_enable);
209 struct goku_udc_regs __iomem *r = ep->dev->regs;
212 tmp = readl(&r->EPxSingle);
213 tmp &= ~(0x11 << ep->num);
214 writel(tmp, &r->EPxSingle);
216 tmp = readl(&r->EPxBCS);
217 tmp &= ~(0x11 << ep->num);
218 writel(tmp, &r->EPxBCS);
220 /* reset dma in case we're still using it */
224 master = readl(®s->dma_master) & MST_RW_BITS;
225 if (ep->num == UDC_MSTWR_ENDPOINT) {
226 master &= ~MST_W_BITS;
227 master |= MST_WR_RESET;
229 master &= ~MST_R_BITS;
230 master |= MST_RD_RESET;
232 writel(master, ®s->dma_master);
236 ep->ep.maxpacket = MAX_FIFO_SIZE;
243 static int goku_ep_disable(struct usb_ep *_ep)
246 struct goku_udc *dev;
249 ep = container_of(_ep, struct goku_ep, ep);
250 if (!_ep || !ep->desc)
253 if (dev->ep0state == EP0_SUSPEND)
256 VDBG(dev, "disable %s\n", _ep->name);
258 spin_lock_irqsave(&dev->lock, flags);
259 nuke(ep, -ESHUTDOWN);
260 ep_reset(dev->regs, ep);
261 spin_unlock_irqrestore(&dev->lock, flags);
266 /*-------------------------------------------------------------------------*/
268 static struct usb_request *
269 goku_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
271 struct goku_request *req;
275 req = kzalloc(sizeof *req, gfp_flags);
279 req->req.dma = DMA_ADDR_INVALID;
280 INIT_LIST_HEAD(&req->queue);
285 goku_free_request(struct usb_ep *_ep, struct usb_request *_req)
287 struct goku_request *req;
292 req = container_of(_req, struct goku_request, req);
293 WARN_ON(!list_empty(&req->queue));
297 /*-------------------------------------------------------------------------*/
299 /* allocating buffers this way eliminates dma mapping overhead, which
300 * on some platforms will mean eliminating a per-io buffer copy. with
301 * some kinds of system caches, further tweaks may still be needed.
304 goku_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
305 dma_addr_t *dma, gfp_t gfp_flags)
310 ep = container_of(_ep, struct goku_ep, ep);
313 *dma = DMA_ADDR_INVALID;
316 /* the main problem with this call is that it wastes memory
317 * on typical 1/N page allocations: it allocates 1-N pages.
319 #warning Using dma_alloc_coherent even with buffers smaller than a page.
320 retval = dma_alloc_coherent(&ep->dev->pdev->dev,
321 bytes, dma, gfp_flags);
323 retval = kmalloc(bytes, gfp_flags);
328 goku_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma, unsigned bytes)
330 /* free memory into the right allocator */
331 if (dma != DMA_ADDR_INVALID) {
334 ep = container_of(_ep, struct goku_ep, ep);
337 dma_free_coherent(&ep->dev->pdev->dev, bytes, buf, dma);
342 /*-------------------------------------------------------------------------*/
345 done(struct goku_ep *ep, struct goku_request *req, int status)
347 struct goku_udc *dev;
348 unsigned stopped = ep->stopped;
350 list_del_init(&req->queue);
352 if (likely(req->req.status == -EINPROGRESS))
353 req->req.status = status;
355 status = req->req.status;
359 pci_unmap_single(dev->pdev, req->req.dma, req->req.length,
360 ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
361 req->req.dma = DMA_ADDR_INVALID;
366 if (status && status != -ESHUTDOWN)
368 VDBG(dev, "complete %s req %p stat %d len %u/%u\n",
369 ep->ep.name, &req->req, status,
370 req->req.actual, req->req.length);
372 /* don't modify queue heads during completion callback */
374 spin_unlock(&dev->lock);
375 req->req.complete(&ep->ep, &req->req);
376 spin_lock(&dev->lock);
377 ep->stopped = stopped;
380 /*-------------------------------------------------------------------------*/
383 write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max)
385 unsigned length, count;
387 length = min(req->req.length - req->req.actual, max);
388 req->req.actual += length;
391 while (likely(count--))
392 writel(*buf++, fifo);
396 // return: 0 = still running, 1 = completed, negative = errno
397 static int write_fifo(struct goku_ep *ep, struct goku_request *req)
399 struct goku_udc *dev = ep->dev;
405 tmp = readl(&dev->regs->DataSet);
406 buf = req->req.buf + req->req.actual;
410 if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN))
413 /* NOTE: just single-buffered PIO-IN for now. */
414 if (unlikely((tmp & DATASET_A(ep->num)) != 0))
417 /* clear our "packet available" irq */
419 writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status);
421 count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket);
423 /* last packet often short (sometimes a zlp, especially on ep0) */
424 if (unlikely(count != ep->ep.maxpacket)) {
425 writel(~(1<<ep->num), &dev->regs->EOP);
427 dev->ep[0].stopped = 1;
428 dev->ep0state = EP0_STATUS;
432 if (likely(req->req.length != req->req.actual)
438 #if 0 /* printk seemed to trash is_last...*/
440 VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n",
441 ep->ep.name, count, is_last ? "/last" : "",
442 req->req.length - req->req.actual, req);
445 /* requests complete when all IN data is in the FIFO,
446 * or sometimes later, if a zlp was needed.
456 static int read_fifo(struct goku_ep *ep, struct goku_request *req)
458 struct goku_udc_regs __iomem *regs;
461 unsigned bufferspace, is_short, dbuff;
463 regs = ep->dev->regs;
465 buf = req->req.buf + req->req.actual;
468 if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT))
471 dbuff = (ep->num == 1 || ep->num == 2);
473 /* ack dataset irq matching the status we'll handle */
475 writel(~INT_EPxDATASET(ep->num), ®s->int_status);
477 set = readl(®s->DataSet) & DATASET_AB(ep->num);
478 size = readl(®s->EPxSizeLA[ep->num]);
479 bufferspace = req->req.length - req->req.actual;
481 /* usually do nothing without an OUT packet */
482 if (likely(ep->num != 0 || bufferspace != 0)) {
483 if (unlikely(set == 0))
485 /* use ep1/ep2 double-buffering for OUT */
486 if (!(size & PACKET_ACTIVE))
487 size = readl(®s->EPxSizeLB[ep->num]);
488 if (!(size & PACKET_ACTIVE)) // "can't happen"
490 size &= DATASIZE; /* EPxSizeH == 0 */
492 /* ep0out no-out-data case for set_config, etc */
496 /* read all bytes from this packet */
497 req->req.actual += size;
498 is_short = (size < ep->ep.maxpacket);
500 VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n",
501 ep->ep.name, size, is_short ? "/S" : "",
502 req, req->req.actual, req->req.length);
504 while (likely(size-- != 0)) {
505 u8 byte = (u8) readl(ep->reg_fifo);
507 if (unlikely(bufferspace == 0)) {
508 /* this happens when the driver's buffer
509 * is smaller than what the host sent.
510 * discard the extra data in this packet.
512 if (req->req.status != -EOVERFLOW)
513 DBG(ep->dev, "%s overflow %u\n",
515 req->req.status = -EOVERFLOW;
523 if (unlikely(is_short || req->req.actual == req->req.length)) {
524 if (unlikely(ep->num == 0)) {
525 /* non-control endpoints now usable? */
526 if (ep->dev->req_config)
527 writel(ep->dev->configured
528 ? USBSTATE_CONFIGURED
531 /* ep0out status stage */
532 writel(~(1<<0), ®s->EOP);
534 ep->dev->ep0state = EP0_STATUS;
538 /* empty the second buffer asap */
539 if (dbuff && !list_empty(&ep->queue)) {
540 req = list_entry(ep->queue.next,
541 struct goku_request, queue);
551 pio_irq_enable(struct goku_udc *dev,
552 struct goku_udc_regs __iomem *regs, int epnum)
554 dev->int_enable |= INT_EPxDATASET (epnum);
555 writel(dev->int_enable, ®s->int_enable);
556 /* write may still be posted */
560 pio_irq_disable(struct goku_udc *dev,
561 struct goku_udc_regs __iomem *regs, int epnum)
563 dev->int_enable &= ~INT_EPxDATASET (epnum);
564 writel(dev->int_enable, ®s->int_enable);
565 /* write may still be posted */
569 pio_advance(struct goku_ep *ep)
571 struct goku_request *req;
573 if (unlikely(list_empty (&ep->queue)))
575 req = list_entry(ep->queue.next, struct goku_request, queue);
576 (ep->is_in ? write_fifo : read_fifo)(ep, req);
580 /*-------------------------------------------------------------------------*/
582 // return: 0 = q running, 1 = q stopped, negative = errno
583 static int start_dma(struct goku_ep *ep, struct goku_request *req)
585 struct goku_udc_regs __iomem *regs = ep->dev->regs;
587 u32 start = req->req.dma;
588 u32 end = start + req->req.length - 1;
590 master = readl(®s->dma_master) & MST_RW_BITS;
592 /* re-init the bits affecting IN dma; careful with zlps */
593 if (likely(ep->is_in)) {
594 if (unlikely(master & MST_RD_ENA)) {
595 DBG (ep->dev, "start, IN active dma %03x!!\n",
599 writel(end, ®s->in_dma_end);
600 writel(start, ®s->in_dma_start);
602 master &= ~MST_R_BITS;
603 if (unlikely(req->req.length == 0))
604 master = MST_RD_ENA | MST_RD_EOPB;
605 else if ((req->req.length % ep->ep.maxpacket) != 0
607 master = MST_RD_ENA | MST_EOPB_ENA;
609 master = MST_RD_ENA | MST_EOPB_DIS;
611 ep->dev->int_enable |= INT_MSTRDEND;
613 /* Goku DMA-OUT merges short packets, which plays poorly with
614 * protocols where short packets mark the transfer boundaries.
615 * The chip supports a nonstandard policy with INT_MSTWRTMOUT,
616 * ending transfers after 3 SOFs; we don't turn it on.
619 if (unlikely(master & MST_WR_ENA)) {
620 DBG (ep->dev, "start, OUT active dma %03x!!\n",
624 writel(end, ®s->out_dma_end);
625 writel(start, ®s->out_dma_start);
627 master &= ~MST_W_BITS;
628 master |= MST_WR_ENA | MST_TIMEOUT_DIS;
630 ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT;
633 writel(master, ®s->dma_master);
634 writel(ep->dev->int_enable, ®s->int_enable);
638 static void dma_advance(struct goku_udc *dev, struct goku_ep *ep)
640 struct goku_request *req;
641 struct goku_udc_regs __iomem *regs = ep->dev->regs;
644 master = readl(®s->dma_master);
646 if (unlikely(list_empty(&ep->queue))) {
649 dev->int_enable &= ~INT_MSTRDEND;
651 dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT);
652 writel(dev->int_enable, ®s->int_enable);
655 req = list_entry(ep->queue.next, struct goku_request, queue);
657 /* normal hw dma completion (not abort) */
658 if (likely(ep->is_in)) {
659 if (unlikely(master & MST_RD_ENA))
661 req->req.actual = readl(®s->in_dma_current);
663 if (unlikely(master & MST_WR_ENA))
666 /* hardware merges short packets, and also hides packet
667 * overruns. a partial packet MAY be in the fifo here.
669 req->req.actual = readl(®s->out_dma_current);
671 req->req.actual -= req->req.dma;
675 VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n",
676 ep->ep.name, ep->is_in ? "IN" : "OUT",
677 req->req.actual, req->req.length, req);
680 if (list_empty(&ep->queue))
682 req = list_entry(ep->queue.next, struct goku_request, queue);
683 (void) start_dma(ep, req);
686 static void abort_dma(struct goku_ep *ep, int status)
688 struct goku_udc_regs __iomem *regs = ep->dev->regs;
689 struct goku_request *req;
692 /* NAK future host requests, hoping the implicit delay lets the
693 * dma engine finish reading (or writing) its latest packet and
694 * empty the dma buffer (up to 16 bytes).
696 * This avoids needing to clean up a partial packet in the fifo;
697 * we can't do that for IN without side effects to HALT and TOGGLE.
699 command(regs, COMMAND_FIFO_DISABLE, ep->num);
700 req = list_entry(ep->queue.next, struct goku_request, queue);
701 master = readl(®s->dma_master) & MST_RW_BITS;
703 /* FIXME using these resets isn't usably documented. this may
704 * not work unless it's followed by disabling the endpoint.
706 * FIXME the OUT reset path doesn't even behave consistently.
709 if (unlikely((readl(®s->dma_master) & MST_RD_ENA) == 0))
711 curr = readl(®s->in_dma_current);
713 writel(curr, ®s->in_dma_end);
714 writel(curr, ®s->in_dma_start);
716 master &= ~MST_R_BITS;
717 master |= MST_RD_RESET;
718 writel(master, ®s->dma_master);
720 if (readl(®s->dma_master) & MST_RD_ENA)
721 DBG(ep->dev, "IN dma active after reset!\n");
724 if (unlikely((readl(®s->dma_master) & MST_WR_ENA) == 0))
726 curr = readl(®s->out_dma_current);
728 writel(curr, ®s->out_dma_end);
729 writel(curr, ®s->out_dma_start);
731 master &= ~MST_W_BITS;
732 master |= MST_WR_RESET;
733 writel(master, ®s->dma_master);
735 if (readl(®s->dma_master) & MST_WR_ENA)
736 DBG(ep->dev, "OUT dma active after reset!\n");
738 req->req.actual = (curr - req->req.dma) + 1;
739 req->req.status = status;
741 VDBG(ep->dev, "%s %s %s %d/%d\n", __FUNCTION__, ep->ep.name,
742 ep->is_in ? "IN" : "OUT",
743 req->req.actual, req->req.length);
745 command(regs, COMMAND_FIFO_ENABLE, ep->num);
750 /* dma already completed; no abort needed */
751 command(regs, COMMAND_FIFO_ENABLE, ep->num);
752 req->req.actual = req->req.length;
756 /*-------------------------------------------------------------------------*/
759 goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
761 struct goku_request *req;
763 struct goku_udc *dev;
767 /* always require a cpu-view buffer so pio works */
768 req = container_of(_req, struct goku_request, req);
769 if (unlikely(!_req || !_req->complete
770 || !_req->buf || !list_empty(&req->queue)))
772 ep = container_of(_ep, struct goku_ep, ep);
773 if (unlikely(!_ep || (!ep->desc && ep->num != 0)))
776 if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN))
779 /* can't touch registers when suspended */
780 if (dev->ep0state == EP0_SUSPEND)
783 /* set up dma mapping in case the caller didn't */
784 if (ep->dma && _req->dma == DMA_ADDR_INVALID) {
785 _req->dma = pci_map_single(dev->pdev, _req->buf, _req->length,
786 ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
791 VDBG(dev, "%s queue req %p, len %u buf %p\n",
792 _ep->name, _req, _req->length, _req->buf);
795 spin_lock_irqsave(&dev->lock, flags);
797 _req->status = -EINPROGRESS;
800 /* for ep0 IN without premature status, zlp is required and
801 * writing EOP starts the status stage (OUT).
803 if (unlikely(ep->num == 0 && ep->is_in))
806 /* kickstart this i/o queue? */
808 if (list_empty(&ep->queue) && likely(!ep->stopped)) {
809 /* dma: done after dma completion IRQ (or error)
810 * pio: done after last fifo operation
813 status = start_dma(ep, req);
815 status = (ep->is_in ? write_fifo : read_fifo)(ep, req);
817 if (unlikely(status != 0)) {
823 } /* else pio or dma irq handler advances the queue. */
825 if (likely(req != 0))
826 list_add_tail(&req->queue, &ep->queue);
828 if (likely(!list_empty(&ep->queue))
829 && likely(ep->num != 0)
831 && !(dev->int_enable & INT_EPxDATASET (ep->num)))
832 pio_irq_enable(dev, dev->regs, ep->num);
834 spin_unlock_irqrestore(&dev->lock, flags);
836 /* pci writes may still be posted */
840 /* dequeue ALL requests */
841 static void nuke(struct goku_ep *ep, int status)
843 struct goku_request *req;
846 if (list_empty(&ep->queue))
849 abort_dma(ep, status);
850 while (!list_empty(&ep->queue)) {
851 req = list_entry(ep->queue.next, struct goku_request, queue);
852 done(ep, req, status);
856 /* dequeue JUST ONE request */
857 static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req)
859 struct goku_request *req;
861 struct goku_udc *dev;
864 ep = container_of(_ep, struct goku_ep, ep);
865 if (!_ep || !_req || (!ep->desc && ep->num != 0))
871 /* we can't touch (dma) registers when suspended */
872 if (dev->ep0state == EP0_SUSPEND)
875 VDBG(dev, "%s %s %s %s %p\n", __FUNCTION__, _ep->name,
876 ep->is_in ? "IN" : "OUT",
877 ep->dma ? "dma" : "pio",
880 spin_lock_irqsave(&dev->lock, flags);
882 /* make sure it's actually queued on this endpoint */
883 list_for_each_entry (req, &ep->queue, queue) {
884 if (&req->req == _req)
887 if (&req->req != _req) {
888 spin_unlock_irqrestore (&dev->lock, flags);
892 if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) {
893 abort_dma(ep, -ECONNRESET);
894 done(ep, req, -ECONNRESET);
895 dma_advance(dev, ep);
896 } else if (!list_empty(&req->queue))
897 done(ep, req, -ECONNRESET);
900 spin_unlock_irqrestore(&dev->lock, flags);
902 return req ? 0 : -EOPNOTSUPP;
905 /*-------------------------------------------------------------------------*/
907 static void goku_clear_halt(struct goku_ep *ep)
909 // assert (ep->num !=0)
910 VDBG(ep->dev, "%s clear halt\n", ep->ep.name);
911 command(ep->dev->regs, COMMAND_SETDATA0, ep->num);
912 command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num);
916 struct goku_request *req;
918 if (list_empty(&ep->queue))
920 req = list_entry(ep->queue.next, struct goku_request,
922 (void) start_dma(ep, req);
928 static int goku_set_halt(struct usb_ep *_ep, int value)
936 ep = container_of (_ep, struct goku_ep, ep);
940 ep->dev->ep0state = EP0_STALL;
941 ep->dev->ep[0].stopped = 1;
945 /* don't change EPxSTATUS_EP_INVALID to READY */
946 } else if (!ep->desc) {
947 DBG(ep->dev, "%s %s inactive?\n", __FUNCTION__, ep->ep.name);
951 spin_lock_irqsave(&ep->dev->lock, flags);
952 if (!list_empty(&ep->queue))
954 else if (ep->is_in && value
955 /* data in (either) packet buffer? */
956 && (readl(&ep->dev->regs->DataSet)
957 & DATASET_AB(ep->num)))
963 VDBG(ep->dev, "%s set halt\n", ep->ep.name);
964 command(ep->dev->regs, COMMAND_STALL, ep->num);
965 readl(ep->reg_status);
967 spin_unlock_irqrestore(&ep->dev->lock, flags);
971 static int goku_fifo_status(struct usb_ep *_ep)
974 struct goku_udc_regs __iomem *regs;
979 ep = container_of(_ep, struct goku_ep, ep);
981 /* size is only reported sanely for OUT */
985 /* ignores 16-byte dma buffer; SizeH == 0 */
986 regs = ep->dev->regs;
987 size = readl(®s->EPxSizeLA[ep->num]) & DATASIZE;
988 size += readl(®s->EPxSizeLB[ep->num]) & DATASIZE;
989 VDBG(ep->dev, "%s %s %u\n", __FUNCTION__, ep->ep.name, size);
993 static void goku_fifo_flush(struct usb_ep *_ep)
996 struct goku_udc_regs __iomem *regs;
1001 ep = container_of(_ep, struct goku_ep, ep);
1002 VDBG(ep->dev, "%s %s\n", __FUNCTION__, ep->ep.name);
1004 /* don't change EPxSTATUS_EP_INVALID to READY */
1005 if (!ep->desc && ep->num != 0) {
1006 DBG(ep->dev, "%s %s inactive?\n", __FUNCTION__, ep->ep.name);
1010 regs = ep->dev->regs;
1011 size = readl(®s->EPxSizeLA[ep->num]);
1014 /* Non-desirable behavior: FIFO_CLEAR also clears the
1015 * endpoint halt feature. For OUT, we _could_ just read
1016 * the bytes out (PIO, if !ep->dma); for in, no choice.
1019 command(regs, COMMAND_FIFO_CLEAR, ep->num);
1022 static struct usb_ep_ops goku_ep_ops = {
1023 .enable = goku_ep_enable,
1024 .disable = goku_ep_disable,
1026 .alloc_request = goku_alloc_request,
1027 .free_request = goku_free_request,
1029 .alloc_buffer = goku_alloc_buffer,
1030 .free_buffer = goku_free_buffer,
1032 .queue = goku_queue,
1033 .dequeue = goku_dequeue,
1035 .set_halt = goku_set_halt,
1036 .fifo_status = goku_fifo_status,
1037 .fifo_flush = goku_fifo_flush,
1040 /*-------------------------------------------------------------------------*/
1042 static int goku_get_frame(struct usb_gadget *_gadget)
1047 static const struct usb_gadget_ops goku_ops = {
1048 .get_frame = goku_get_frame,
1053 /*-------------------------------------------------------------------------*/
1055 static inline char *dmastr(void)
1058 return "(dma disabled)";
1059 else if (use_dma == 2)
1060 return "(dma IN and OUT)";
1065 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1067 static const char proc_node_name [] = "driver/udc";
1069 #define FOURBITS "%s%s%s%s"
1070 #define EIGHTBITS FOURBITS FOURBITS
1073 dump_intmask(const char *label, u32 mask, char **next, unsigned *size)
1077 /* int_status is the same format ... */
1078 t = scnprintf(*next, *size,
1079 "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n",
1081 (mask & INT_PWRDETECT) ? " power" : "",
1082 (mask & INT_SYSERROR) ? " sys" : "",
1083 (mask & INT_MSTRDEND) ? " in-dma" : "",
1084 (mask & INT_MSTWRTMOUT) ? " wrtmo" : "",
1086 (mask & INT_MSTWREND) ? " out-dma" : "",
1087 (mask & INT_MSTWRSET) ? " wrset" : "",
1088 (mask & INT_ERR) ? " err" : "",
1089 (mask & INT_SOF) ? " sof" : "",
1091 (mask & INT_EP3NAK) ? " ep3nak" : "",
1092 (mask & INT_EP2NAK) ? " ep2nak" : "",
1093 (mask & INT_EP1NAK) ? " ep1nak" : "",
1094 (mask & INT_EP3DATASET) ? " ep3" : "",
1096 (mask & INT_EP2DATASET) ? " ep2" : "",
1097 (mask & INT_EP1DATASET) ? " ep1" : "",
1098 (mask & INT_STATUSNAK) ? " ep0snak" : "",
1099 (mask & INT_STATUS) ? " ep0status" : "",
1101 (mask & INT_SETUP) ? " setup" : "",
1102 (mask & INT_ENDPOINT0) ? " ep0" : "",
1103 (mask & INT_USBRESET) ? " reset" : "",
1104 (mask & INT_SUSPEND) ? " suspend" : "");
1111 udc_proc_read(char *buffer, char **start, off_t off, int count,
1112 int *eof, void *_dev)
1115 struct goku_udc *dev = _dev;
1116 struct goku_udc_regs __iomem *regs = dev->regs;
1118 unsigned size = count;
1119 unsigned long flags;
1120 int i, t, is_usb_connected;
1126 local_irq_save(flags);
1128 /* basic device status */
1129 tmp = readl(®s->power_detect);
1130 is_usb_connected = tmp & PW_DETECT;
1131 t = scnprintf(next, size,
1133 "%s version: %s %s\n"
1134 "Gadget driver: %s\n"
1137 pci_name(dev->pdev), driver_desc,
1138 driver_name, DRIVER_VERSION, dmastr(),
1139 dev->driver ? dev->driver->driver.name : "(none)",
1141 ? ((tmp & PW_PULLUP) ? "full speed" : "powered")
1144 switch(dev->ep0state){
1145 case EP0_DISCONNECT: tmp = "ep0_disconnect"; break;
1146 case EP0_IDLE: tmp = "ep0_idle"; break;
1147 case EP0_IN: tmp = "ep0_in"; break;
1148 case EP0_OUT: tmp = "ep0_out"; break;
1149 case EP0_STATUS: tmp = "ep0_status"; break;
1150 case EP0_STALL: tmp = "ep0_stall"; break;
1151 case EP0_SUSPEND: tmp = "ep0_suspend"; break;
1152 default: tmp = "ep0_?"; break;
1158 dump_intmask("int_status", readl(®s->int_status), &next, &size);
1159 dump_intmask("int_enable", readl(®s->int_enable), &next, &size);
1161 if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0)
1164 /* registers for (active) device and ep0 */
1165 t = scnprintf(next, size, "\nirqs %lu\ndataset %02x "
1166 "single.bcs %02x.%02x state %x addr %u\n",
1167 dev->irqs, readl(®s->DataSet),
1168 readl(®s->EPxSingle), readl(®s->EPxBCS),
1169 readl(®s->UsbState),
1170 readl(®s->address));
1174 tmp = readl(®s->dma_master);
1175 t = scnprintf(next, size,
1176 "dma %03X =" EIGHTBITS "%s %s\n", tmp,
1177 (tmp & MST_EOPB_DIS) ? " eopb-" : "",
1178 (tmp & MST_EOPB_ENA) ? " eopb+" : "",
1179 (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "",
1180 (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "",
1182 (tmp & MST_RD_EOPB) ? " eopb" : "",
1183 (tmp & MST_RD_RESET) ? " in_reset" : "",
1184 (tmp & MST_WR_RESET) ? " out_reset" : "",
1185 (tmp & MST_RD_ENA) ? " IN" : "",
1187 (tmp & MST_WR_ENA) ? " OUT" : "",
1188 (tmp & MST_CONNECTION)
1194 /* dump endpoint queues */
1195 for (i = 0; i < 4; i++) {
1196 struct goku_ep *ep = &dev->ep [i];
1197 struct goku_request *req;
1203 tmp = readl(ep->reg_status);
1204 t = scnprintf(next, size,
1205 "%s %s max %u %s, irqs %lu, "
1206 "status %02x (%s) " FOURBITS "\n",
1208 ep->is_in ? "in" : "out",
1210 ep->dma ? "dma" : "pio",
1213 switch (tmp & EPxSTATUS_EP_MASK) {
1214 case EPxSTATUS_EP_READY:
1216 case EPxSTATUS_EP_DATAIN:
1217 s = "packet"; break;
1218 case EPxSTATUS_EP_FULL:
1220 case EPxSTATUS_EP_TX_ERR: // host will retry
1221 s = "tx_err"; break;
1222 case EPxSTATUS_EP_RX_ERR:
1223 s = "rx_err"; break;
1224 case EPxSTATUS_EP_BUSY: /* ep0 only */
1226 case EPxSTATUS_EP_STALL:
1228 case EPxSTATUS_EP_INVALID: // these "can't happen"
1229 s = "invalid"; break;
1233 (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0",
1234 (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "",
1235 (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "",
1236 (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : ""
1238 if (t <= 0 || t > size)
1243 if (list_empty(&ep->queue)) {
1244 t = scnprintf(next, size, "\t(nothing queued)\n");
1245 if (t <= 0 || t > size)
1251 list_for_each_entry(req, &ep->queue, queue) {
1252 if (ep->dma && req->queue.prev == &ep->queue) {
1253 if (i == UDC_MSTRD_ENDPOINT)
1254 tmp = readl(®s->in_dma_current);
1256 tmp = readl(®s->out_dma_current);
1257 tmp -= req->req.dma;
1260 tmp = req->req.actual;
1262 t = scnprintf(next, size,
1263 "\treq %p len %u/%u buf %p\n",
1264 &req->req, tmp, req->req.length,
1266 if (t <= 0 || t > size)
1274 local_irq_restore(flags);
1276 return count - size;
1279 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
1281 /*-------------------------------------------------------------------------*/
1283 static void udc_reinit (struct goku_udc *dev)
1285 static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" };
1289 INIT_LIST_HEAD (&dev->gadget.ep_list);
1290 dev->gadget.ep0 = &dev->ep [0].ep;
1291 dev->gadget.speed = USB_SPEED_UNKNOWN;
1292 dev->ep0state = EP0_DISCONNECT;
1295 for (i = 0; i < 4; i++) {
1296 struct goku_ep *ep = &dev->ep[i];
1299 ep->ep.name = names[i];
1300 ep->reg_fifo = &dev->regs->ep_fifo [i];
1301 ep->reg_status = &dev->regs->ep_status [i];
1302 ep->reg_mode = &dev->regs->ep_mode[i];
1304 ep->ep.ops = &goku_ep_ops;
1305 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1307 INIT_LIST_HEAD (&ep->queue);
1312 dev->ep[0].reg_mode = NULL;
1313 dev->ep[0].ep.maxpacket = MAX_EP0_SIZE;
1314 list_del_init (&dev->ep[0].ep.ep_list);
1317 static void udc_reset(struct goku_udc *dev)
1319 struct goku_udc_regs __iomem *regs = dev->regs;
1321 writel(0, ®s->power_detect);
1322 writel(0, ®s->int_enable);
1323 readl(®s->int_enable);
1324 dev->int_enable = 0;
1326 /* deassert reset, leave USB D+ at hi-Z (no pullup)
1327 * don't let INT_PWRDETECT sequence begin
1330 writel(PW_RESETB, ®s->power_detect);
1331 readl(®s->int_enable);
1334 static void ep0_start(struct goku_udc *dev)
1336 struct goku_udc_regs __iomem *regs = dev->regs;
1339 VDBG(dev, "%s\n", __FUNCTION__);
1343 //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master);
1345 /* hw handles set_address, set_feature, get_status; maybe more */
1346 writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF
1347 | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF
1348 | G_REQMODE_GET_DESC
1349 | G_REQMODE_CLEAR_FEAT
1352 for (i = 0; i < 4; i++)
1353 dev->ep[i].irqs = 0;
1355 /* can't modify descriptors after writing UsbReady */
1356 for (i = 0; i < DESC_LEN; i++)
1357 writel(0, ®s->descriptors[i]);
1358 writel(0, ®s->UsbReady);
1360 /* expect ep0 requests when the host drops reset */
1361 writel(PW_RESETB | PW_PULLUP, ®s->power_detect);
1362 dev->int_enable = INT_DEVWIDE | INT_EP0;
1363 writel(dev->int_enable, &dev->regs->int_enable);
1364 readl(®s->int_enable);
1365 dev->gadget.speed = USB_SPEED_FULL;
1366 dev->ep0state = EP0_IDLE;
1369 static void udc_enable(struct goku_udc *dev)
1371 /* start enumeration now, or after power detect irq */
1372 if (readl(&dev->regs->power_detect) & PW_DETECT)
1375 DBG(dev, "%s\n", __FUNCTION__);
1376 dev->int_enable = INT_PWRDETECT;
1377 writel(dev->int_enable, &dev->regs->int_enable);
1381 /*-------------------------------------------------------------------------*/
1383 /* keeping it simple:
1384 * - one bus driver, initted first;
1385 * - one function driver, initted second
1388 static struct goku_udc *the_controller;
1390 /* when a driver is successfully registered, it will receive
1391 * control requests including set_configuration(), which enables
1392 * non-control requests. then usb traffic follows until a
1393 * disconnect is reported. then a host may connect again, or
1394 * the driver might get unbound.
1396 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1398 struct goku_udc *dev = the_controller;
1402 || driver->speed != USB_SPEED_FULL
1404 || !driver->disconnect
1412 /* hook up the driver */
1413 driver->driver.bus = NULL;
1414 dev->driver = driver;
1415 dev->gadget.dev.driver = &driver->driver;
1416 retval = driver->bind(&dev->gadget);
1418 DBG(dev, "bind to driver %s --> error %d\n",
1419 driver->driver.name, retval);
1421 dev->gadget.dev.driver = NULL;
1425 /* then enable host detection and ep0; and we're ready
1426 * for set_configuration as well as eventual disconnect.
1430 DBG(dev, "registered gadget driver '%s'\n", driver->driver.name);
1433 EXPORT_SYMBOL(usb_gadget_register_driver);
1436 stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver)
1440 DBG (dev, "%s\n", __FUNCTION__);
1442 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1445 /* disconnect gadget driver after quiesceing hw and the driver */
1447 for (i = 0; i < 4; i++)
1448 nuke(&dev->ep [i], -ESHUTDOWN);
1450 spin_unlock(&dev->lock);
1451 driver->disconnect(&dev->gadget);
1452 spin_lock(&dev->lock);
1459 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1461 struct goku_udc *dev = the_controller;
1462 unsigned long flags;
1466 if (!driver || driver != dev->driver || !driver->unbind)
1469 spin_lock_irqsave(&dev->lock, flags);
1471 stop_activity(dev, driver);
1472 spin_unlock_irqrestore(&dev->lock, flags);
1474 driver->unbind(&dev->gadget);
1476 DBG(dev, "unregistered driver '%s'\n", driver->driver.name);
1479 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1482 /*-------------------------------------------------------------------------*/
1484 static void ep0_setup(struct goku_udc *dev)
1486 struct goku_udc_regs __iomem *regs = dev->regs;
1487 struct usb_ctrlrequest ctrl;
1490 /* read SETUP packet and enter DATA stage */
1491 ctrl.bRequestType = readl(®s->bRequestType);
1492 ctrl.bRequest = readl(®s->bRequest);
1493 ctrl.wValue = cpu_to_le16((readl(®s->wValueH) << 8)
1494 | readl(®s->wValueL));
1495 ctrl.wIndex = cpu_to_le16((readl(®s->wIndexH) << 8)
1496 | readl(®s->wIndexL));
1497 ctrl.wLength = cpu_to_le16((readl(®s->wLengthH) << 8)
1498 | readl(®s->wLengthL));
1499 writel(0, ®s->SetupRecv);
1501 nuke(&dev->ep[0], 0);
1502 dev->ep[0].stopped = 0;
1503 if (likely(ctrl.bRequestType & USB_DIR_IN)) {
1504 dev->ep[0].is_in = 1;
1505 dev->ep0state = EP0_IN;
1506 /* detect early status stages */
1507 writel(ICONTROL_STATUSNAK, &dev->regs->IntControl);
1509 dev->ep[0].is_in = 0;
1510 dev->ep0state = EP0_OUT;
1512 /* NOTE: CLEAR_FEATURE is done in software so that we can
1513 * synchronize transfer restarts after bulk IN stalls. data
1514 * won't even enter the fifo until the halt is cleared.
1516 switch (ctrl.bRequest) {
1517 case USB_REQ_CLEAR_FEATURE:
1518 switch (ctrl.bRequestType) {
1519 case USB_RECIP_ENDPOINT:
1520 tmp = le16_to_cpu(ctrl.wIndex) & 0x0f;
1521 /* active endpoint */
1522 if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0))
1524 if (ctrl.wIndex & __constant_cpu_to_le16(
1526 if (!dev->ep[tmp].is_in)
1529 if (dev->ep[tmp].is_in)
1532 if (ctrl.wValue != __constant_cpu_to_le16(
1536 goku_clear_halt(&dev->ep[tmp]);
1538 /* start ep0out status stage */
1539 writel(~(1<<0), ®s->EOP);
1540 dev->ep[0].stopped = 1;
1541 dev->ep0state = EP0_STATUS;
1543 case USB_RECIP_DEVICE:
1544 /* device remote wakeup: always clear */
1545 if (ctrl.wValue != __constant_cpu_to_le16(1))
1547 VDBG(dev, "clear dev remote wakeup\n");
1549 case USB_RECIP_INTERFACE:
1551 default: /* pass to gadget driver */
1561 VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
1562 ctrl.bRequestType, ctrl.bRequest,
1563 le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex),
1564 le16_to_cpu(ctrl.wLength));
1567 /* hw wants to know when we're configured (or not) */
1568 dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION
1569 && ctrl.bRequestType == USB_RECIP_DEVICE);
1570 if (unlikely(dev->req_config))
1571 dev->configured = (ctrl.wValue != __constant_cpu_to_le16(0));
1573 /* delegate everything to the gadget driver.
1574 * it may respond after this irq handler returns.
1576 spin_unlock (&dev->lock);
1577 tmp = dev->driver->setup(&dev->gadget, &ctrl);
1578 spin_lock (&dev->lock);
1579 if (unlikely(tmp < 0)) {
1582 VDBG(dev, "req %02x.%02x protocol STALL; err %d\n",
1583 ctrl.bRequestType, ctrl.bRequest, tmp);
1585 command(regs, COMMAND_STALL, 0);
1586 dev->ep[0].stopped = 1;
1587 dev->ep0state = EP0_STALL;
1590 /* expect at least one data or status stage irq */
1593 #define ACK(irqbit) { \
1595 writel(~irqbit, ®s->int_status); \
1599 static irqreturn_t goku_irq(int irq, void *_dev)
1601 struct goku_udc *dev = _dev;
1602 struct goku_udc_regs __iomem *regs = dev->regs;
1604 u32 stat, handled = 0;
1605 unsigned i, rescans = 5;
1607 spin_lock(&dev->lock);
1610 stat = readl(®s->int_status) & dev->int_enable;
1615 /* device-wide irqs */
1616 if (unlikely(stat & INT_DEVWIDE)) {
1617 if (stat & INT_SYSERROR) {
1618 ERROR(dev, "system error\n");
1619 stop_activity(dev, dev->driver);
1622 // FIXME have a neater way to prevent re-enumeration
1626 if (stat & INT_PWRDETECT) {
1627 writel(~stat, ®s->int_status);
1628 if (readl(&dev->regs->power_detect) & PW_DETECT) {
1629 VDBG(dev, "connect\n");
1632 DBG(dev, "disconnect\n");
1633 if (dev->gadget.speed == USB_SPEED_FULL)
1634 stop_activity(dev, dev->driver);
1635 dev->ep0state = EP0_DISCONNECT;
1636 dev->int_enable = INT_DEVWIDE;
1637 writel(dev->int_enable, &dev->regs->int_enable);
1643 if (stat & INT_SUSPEND) {
1645 if (readl(®s->ep_status[0]) & EPxSTATUS_SUSPEND) {
1646 switch (dev->ep0state) {
1647 case EP0_DISCONNECT:
1653 DBG(dev, "USB suspend\n");
1654 dev->ep0state = EP0_SUSPEND;
1655 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1657 && dev->driver->suspend) {
1658 spin_unlock(&dev->lock);
1659 dev->driver->suspend(&dev->gadget);
1660 spin_lock(&dev->lock);
1663 if (dev->ep0state != EP0_SUSPEND) {
1664 DBG(dev, "bogus USB resume %d\n",
1668 DBG(dev, "USB resume\n");
1669 dev->ep0state = EP0_IDLE;
1670 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1672 && dev->driver->resume) {
1673 spin_unlock(&dev->lock);
1674 dev->driver->resume(&dev->gadget);
1675 spin_lock(&dev->lock);
1680 if (stat & INT_USBRESET) { /* hub reset done */
1682 INFO(dev, "USB reset done, gadget %s\n",
1683 dev->driver->driver.name);
1685 // and INT_ERR on some endpoint's crc/bitstuff/... problem
1688 /* progress ep0 setup, data, or status stages.
1689 * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs
1691 if (stat & INT_SETUP) {
1696 if (stat & INT_STATUSNAK) {
1697 ACK(INT_STATUSNAK|INT_ENDPOINT0);
1698 if (dev->ep0state == EP0_IN) {
1702 writel(~(1<<0), ®s->EOP);
1703 dev->ep0state = EP0_STATUS;
1706 if (stat & INT_ENDPOINT0) {
1713 /* dma completion */
1714 if (stat & INT_MSTRDEND) { /* IN */
1716 ep = &dev->ep[UDC_MSTRD_ENDPOINT];
1718 dma_advance(dev, ep);
1720 if (stat & INT_MSTWREND) { /* OUT */
1722 ep = &dev->ep[UDC_MSTWR_ENDPOINT];
1724 dma_advance(dev, ep);
1726 if (stat & INT_MSTWRTMOUT) { /* OUT */
1727 ACK(INT_MSTWRTMOUT);
1728 ep = &dev->ep[UDC_MSTWR_ENDPOINT];
1730 ERROR(dev, "%s write timeout ?\n", ep->ep.name);
1731 // reset dma? then dma_advance()
1735 for (i = 1; i < 4; i++) {
1736 u32 tmp = INT_EPxDATASET(i);
1742 if (list_empty (&ep->queue))
1743 pio_irq_disable(dev, regs, i);
1753 (void)readl(®s->int_enable);
1754 spin_unlock(&dev->lock);
1756 DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat,
1757 readl(®s->int_status), dev->int_enable);
1758 return IRQ_RETVAL(handled);
1763 /*-------------------------------------------------------------------------*/
1765 static void gadget_release(struct device *_dev)
1767 struct goku_udc *dev = dev_get_drvdata(_dev);
1772 /* tear down the binding between this driver and the pci device */
1774 static void goku_remove(struct pci_dev *pdev)
1776 struct goku_udc *dev = pci_get_drvdata(pdev);
1778 DBG(dev, "%s\n", __FUNCTION__);
1780 BUG_ON(dev->driver);
1782 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1783 remove_proc_entry(proc_node_name, NULL);
1788 free_irq(pdev->irq, dev);
1791 if (dev->got_region)
1792 release_mem_region(pci_resource_start (pdev, 0),
1793 pci_resource_len (pdev, 0));
1795 pci_disable_device(pdev);
1796 device_unregister(&dev->gadget.dev);
1798 pci_set_drvdata(pdev, NULL);
1800 the_controller = NULL;
1802 INFO(dev, "unbind\n");
1805 /* wrap this driver around the specified pci device, but
1806 * don't respond over USB until a gadget driver binds to us.
1809 static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1811 struct goku_udc *dev = NULL;
1812 unsigned long resource, len;
1813 void __iomem *base = NULL;
1816 /* if you want to support more than one controller in a system,
1817 * usb_gadget_driver_{register,unregister}() must change.
1819 if (the_controller) {
1820 WARN(dev, "ignoring %s\n", pci_name(pdev));
1824 printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev));
1829 /* alloc, and start init */
1830 dev = kmalloc (sizeof *dev, GFP_KERNEL);
1832 pr_debug("enomem %s\n", pci_name(pdev));
1837 memset(dev, 0, sizeof *dev);
1838 spin_lock_init(&dev->lock);
1840 dev->gadget.ops = &goku_ops;
1842 /* the "gadget" abstracts/virtualizes the controller */
1843 strcpy(dev->gadget.dev.bus_id, "gadget");
1844 dev->gadget.dev.parent = &pdev->dev;
1845 dev->gadget.dev.dma_mask = pdev->dev.dma_mask;
1846 dev->gadget.dev.release = gadget_release;
1847 dev->gadget.name = driver_name;
1849 /* now all the pci goodies ... */
1850 retval = pci_enable_device(pdev);
1852 DBG(dev, "can't enable, %d\n", retval);
1857 resource = pci_resource_start(pdev, 0);
1858 len = pci_resource_len(pdev, 0);
1859 if (!request_mem_region(resource, len, driver_name)) {
1860 DBG(dev, "controller already in use\n");
1864 dev->got_region = 1;
1866 base = ioremap_nocache(resource, len);
1868 DBG(dev, "can't map memory\n");
1872 dev->regs = (struct goku_udc_regs __iomem *) base;
1874 pci_set_drvdata(pdev, dev);
1875 INFO(dev, "%s\n", driver_desc);
1876 INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr());
1877 INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base);
1879 /* init to known state, then setup irqs */
1882 if (request_irq(pdev->irq, goku_irq, IRQF_SHARED/*|IRQF_SAMPLE_RANDOM*/,
1883 driver_name, dev) != 0) {
1884 DBG(dev, "request interrupt %d failed\n", pdev->irq);
1890 pci_set_master(pdev);
1893 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1894 create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev);
1898 the_controller = dev;
1899 device_register(&dev->gadget.dev);
1910 /*-------------------------------------------------------------------------*/
1912 static struct pci_device_id pci_ids [] = { {
1913 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
1915 .vendor = 0x102f, /* Toshiba */
1916 .device = 0x0107, /* this UDC */
1917 .subvendor = PCI_ANY_ID,
1918 .subdevice = PCI_ANY_ID,
1920 }, { /* end: all zeroes */ }
1922 MODULE_DEVICE_TABLE (pci, pci_ids);
1924 static struct pci_driver goku_pci_driver = {
1925 .name = (char *) driver_name,
1926 .id_table = pci_ids,
1928 .probe = goku_probe,
1929 .remove = goku_remove,
1931 /* FIXME add power management support */
1934 static int __init init (void)
1936 return pci_register_driver (&goku_pci_driver);
1940 static void __exit cleanup (void)
1942 pci_unregister_driver (&goku_pci_driver);
1944 module_exit (cleanup);