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).
23 // #define VERBOSE /* extra debug messages (success too) */
24 // #define USB_TRACE /* packet-level success messages */
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/pci.h>
29 #include <linux/delay.h>
30 #include <linux/ioport.h>
31 #include <linux/slab.h>
32 #include <linux/errno.h>
33 #include <linux/init.h>
34 #include <linux/timer.h>
35 #include <linux/list.h>
36 #include <linux/interrupt.h>
37 #include <linux/proc_fs.h>
38 #include <linux/device.h>
39 #include <linux/usb/ch9.h>
40 #include <linux/usb/gadget.h>
41 #include <linux/prefetch.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 != usb_endpoint_num(desc))
117 switch (usb_endpoint_type(desc)) {
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 = get_unaligned_le16(&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_endpoint_dir_in(desc);
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 /*-------------------------------------------------------------------------*/
300 done(struct goku_ep *ep, struct goku_request *req, int status)
302 struct goku_udc *dev;
303 unsigned stopped = ep->stopped;
305 list_del_init(&req->queue);
307 if (likely(req->req.status == -EINPROGRESS))
308 req->req.status = status;
310 status = req->req.status;
314 pci_unmap_single(dev->pdev, req->req.dma, req->req.length,
315 ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
316 req->req.dma = DMA_ADDR_INVALID;
321 if (status && status != -ESHUTDOWN)
323 VDBG(dev, "complete %s req %p stat %d len %u/%u\n",
324 ep->ep.name, &req->req, status,
325 req->req.actual, req->req.length);
327 /* don't modify queue heads during completion callback */
329 spin_unlock(&dev->lock);
330 req->req.complete(&ep->ep, &req->req);
331 spin_lock(&dev->lock);
332 ep->stopped = stopped;
335 /*-------------------------------------------------------------------------*/
338 write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max)
340 unsigned length, count;
342 length = min(req->req.length - req->req.actual, max);
343 req->req.actual += length;
346 while (likely(count--))
347 writel(*buf++, fifo);
351 // return: 0 = still running, 1 = completed, negative = errno
352 static int write_fifo(struct goku_ep *ep, struct goku_request *req)
354 struct goku_udc *dev = ep->dev;
360 tmp = readl(&dev->regs->DataSet);
361 buf = req->req.buf + req->req.actual;
365 if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN))
368 /* NOTE: just single-buffered PIO-IN for now. */
369 if (unlikely((tmp & DATASET_A(ep->num)) != 0))
372 /* clear our "packet available" irq */
374 writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status);
376 count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket);
378 /* last packet often short (sometimes a zlp, especially on ep0) */
379 if (unlikely(count != ep->ep.maxpacket)) {
380 writel(~(1<<ep->num), &dev->regs->EOP);
382 dev->ep[0].stopped = 1;
383 dev->ep0state = EP0_STATUS;
387 if (likely(req->req.length != req->req.actual)
393 #if 0 /* printk seemed to trash is_last...*/
395 VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n",
396 ep->ep.name, count, is_last ? "/last" : "",
397 req->req.length - req->req.actual, req);
400 /* requests complete when all IN data is in the FIFO,
401 * or sometimes later, if a zlp was needed.
411 static int read_fifo(struct goku_ep *ep, struct goku_request *req)
413 struct goku_udc_regs __iomem *regs;
416 unsigned bufferspace, is_short, dbuff;
418 regs = ep->dev->regs;
420 buf = req->req.buf + req->req.actual;
423 if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT))
426 dbuff = (ep->num == 1 || ep->num == 2);
428 /* ack dataset irq matching the status we'll handle */
430 writel(~INT_EPxDATASET(ep->num), ®s->int_status);
432 set = readl(®s->DataSet) & DATASET_AB(ep->num);
433 size = readl(®s->EPxSizeLA[ep->num]);
434 bufferspace = req->req.length - req->req.actual;
436 /* usually do nothing without an OUT packet */
437 if (likely(ep->num != 0 || bufferspace != 0)) {
438 if (unlikely(set == 0))
440 /* use ep1/ep2 double-buffering for OUT */
441 if (!(size & PACKET_ACTIVE))
442 size = readl(®s->EPxSizeLB[ep->num]);
443 if (!(size & PACKET_ACTIVE)) /* "can't happen" */
445 size &= DATASIZE; /* EPxSizeH == 0 */
447 /* ep0out no-out-data case for set_config, etc */
451 /* read all bytes from this packet */
452 req->req.actual += size;
453 is_short = (size < ep->ep.maxpacket);
455 VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n",
456 ep->ep.name, size, is_short ? "/S" : "",
457 req, req->req.actual, req->req.length);
459 while (likely(size-- != 0)) {
460 u8 byte = (u8) readl(ep->reg_fifo);
462 if (unlikely(bufferspace == 0)) {
463 /* this happens when the driver's buffer
464 * is smaller than what the host sent.
465 * discard the extra data in this packet.
467 if (req->req.status != -EOVERFLOW)
468 DBG(ep->dev, "%s overflow %u\n",
470 req->req.status = -EOVERFLOW;
478 if (unlikely(is_short || req->req.actual == req->req.length)) {
479 if (unlikely(ep->num == 0)) {
480 /* non-control endpoints now usable? */
481 if (ep->dev->req_config)
482 writel(ep->dev->configured
483 ? USBSTATE_CONFIGURED
486 /* ep0out status stage */
487 writel(~(1<<0), ®s->EOP);
489 ep->dev->ep0state = EP0_STATUS;
493 /* empty the second buffer asap */
494 if (dbuff && !list_empty(&ep->queue)) {
495 req = list_entry(ep->queue.next,
496 struct goku_request, queue);
506 pio_irq_enable(struct goku_udc *dev,
507 struct goku_udc_regs __iomem *regs, int epnum)
509 dev->int_enable |= INT_EPxDATASET (epnum);
510 writel(dev->int_enable, ®s->int_enable);
511 /* write may still be posted */
515 pio_irq_disable(struct goku_udc *dev,
516 struct goku_udc_regs __iomem *regs, int epnum)
518 dev->int_enable &= ~INT_EPxDATASET (epnum);
519 writel(dev->int_enable, ®s->int_enable);
520 /* write may still be posted */
524 pio_advance(struct goku_ep *ep)
526 struct goku_request *req;
528 if (unlikely(list_empty (&ep->queue)))
530 req = list_entry(ep->queue.next, struct goku_request, queue);
531 (ep->is_in ? write_fifo : read_fifo)(ep, req);
535 /*-------------------------------------------------------------------------*/
537 // return: 0 = q running, 1 = q stopped, negative = errno
538 static int start_dma(struct goku_ep *ep, struct goku_request *req)
540 struct goku_udc_regs __iomem *regs = ep->dev->regs;
542 u32 start = req->req.dma;
543 u32 end = start + req->req.length - 1;
545 master = readl(®s->dma_master) & MST_RW_BITS;
547 /* re-init the bits affecting IN dma; careful with zlps */
548 if (likely(ep->is_in)) {
549 if (unlikely(master & MST_RD_ENA)) {
550 DBG (ep->dev, "start, IN active dma %03x!!\n",
554 writel(end, ®s->in_dma_end);
555 writel(start, ®s->in_dma_start);
557 master &= ~MST_R_BITS;
558 if (unlikely(req->req.length == 0))
559 master = MST_RD_ENA | MST_RD_EOPB;
560 else if ((req->req.length % ep->ep.maxpacket) != 0
562 master = MST_RD_ENA | MST_EOPB_ENA;
564 master = MST_RD_ENA | MST_EOPB_DIS;
566 ep->dev->int_enable |= INT_MSTRDEND;
568 /* Goku DMA-OUT merges short packets, which plays poorly with
569 * protocols where short packets mark the transfer boundaries.
570 * The chip supports a nonstandard policy with INT_MSTWRTMOUT,
571 * ending transfers after 3 SOFs; we don't turn it on.
574 if (unlikely(master & MST_WR_ENA)) {
575 DBG (ep->dev, "start, OUT active dma %03x!!\n",
579 writel(end, ®s->out_dma_end);
580 writel(start, ®s->out_dma_start);
582 master &= ~MST_W_BITS;
583 master |= MST_WR_ENA | MST_TIMEOUT_DIS;
585 ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT;
588 writel(master, ®s->dma_master);
589 writel(ep->dev->int_enable, ®s->int_enable);
593 static void dma_advance(struct goku_udc *dev, struct goku_ep *ep)
595 struct goku_request *req;
596 struct goku_udc_regs __iomem *regs = ep->dev->regs;
599 master = readl(®s->dma_master);
601 if (unlikely(list_empty(&ep->queue))) {
604 dev->int_enable &= ~INT_MSTRDEND;
606 dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT);
607 writel(dev->int_enable, ®s->int_enable);
610 req = list_entry(ep->queue.next, struct goku_request, queue);
612 /* normal hw dma completion (not abort) */
613 if (likely(ep->is_in)) {
614 if (unlikely(master & MST_RD_ENA))
616 req->req.actual = readl(®s->in_dma_current);
618 if (unlikely(master & MST_WR_ENA))
621 /* hardware merges short packets, and also hides packet
622 * overruns. a partial packet MAY be in the fifo here.
624 req->req.actual = readl(®s->out_dma_current);
626 req->req.actual -= req->req.dma;
630 VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n",
631 ep->ep.name, ep->is_in ? "IN" : "OUT",
632 req->req.actual, req->req.length, req);
635 if (list_empty(&ep->queue))
637 req = list_entry(ep->queue.next, struct goku_request, queue);
638 (void) start_dma(ep, req);
641 static void abort_dma(struct goku_ep *ep, int status)
643 struct goku_udc_regs __iomem *regs = ep->dev->regs;
644 struct goku_request *req;
647 /* NAK future host requests, hoping the implicit delay lets the
648 * dma engine finish reading (or writing) its latest packet and
649 * empty the dma buffer (up to 16 bytes).
651 * This avoids needing to clean up a partial packet in the fifo;
652 * we can't do that for IN without side effects to HALT and TOGGLE.
654 command(regs, COMMAND_FIFO_DISABLE, ep->num);
655 req = list_entry(ep->queue.next, struct goku_request, queue);
656 master = readl(®s->dma_master) & MST_RW_BITS;
658 /* FIXME using these resets isn't usably documented. this may
659 * not work unless it's followed by disabling the endpoint.
661 * FIXME the OUT reset path doesn't even behave consistently.
664 if (unlikely((readl(®s->dma_master) & MST_RD_ENA) == 0))
666 curr = readl(®s->in_dma_current);
668 writel(curr, ®s->in_dma_end);
669 writel(curr, ®s->in_dma_start);
671 master &= ~MST_R_BITS;
672 master |= MST_RD_RESET;
673 writel(master, ®s->dma_master);
675 if (readl(®s->dma_master) & MST_RD_ENA)
676 DBG(ep->dev, "IN dma active after reset!\n");
679 if (unlikely((readl(®s->dma_master) & MST_WR_ENA) == 0))
681 curr = readl(®s->out_dma_current);
683 writel(curr, ®s->out_dma_end);
684 writel(curr, ®s->out_dma_start);
686 master &= ~MST_W_BITS;
687 master |= MST_WR_RESET;
688 writel(master, ®s->dma_master);
690 if (readl(®s->dma_master) & MST_WR_ENA)
691 DBG(ep->dev, "OUT dma active after reset!\n");
693 req->req.actual = (curr - req->req.dma) + 1;
694 req->req.status = status;
696 VDBG(ep->dev, "%s %s %s %d/%d\n", __func__, ep->ep.name,
697 ep->is_in ? "IN" : "OUT",
698 req->req.actual, req->req.length);
700 command(regs, COMMAND_FIFO_ENABLE, ep->num);
705 /* dma already completed; no abort needed */
706 command(regs, COMMAND_FIFO_ENABLE, ep->num);
707 req->req.actual = req->req.length;
711 /*-------------------------------------------------------------------------*/
714 goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
716 struct goku_request *req;
718 struct goku_udc *dev;
722 /* always require a cpu-view buffer so pio works */
723 req = container_of(_req, struct goku_request, req);
724 if (unlikely(!_req || !_req->complete
725 || !_req->buf || !list_empty(&req->queue)))
727 ep = container_of(_ep, struct goku_ep, ep);
728 if (unlikely(!_ep || (!ep->desc && ep->num != 0)))
731 if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN))
734 /* can't touch registers when suspended */
735 if (dev->ep0state == EP0_SUSPEND)
738 /* set up dma mapping in case the caller didn't */
739 if (ep->dma && _req->dma == DMA_ADDR_INVALID) {
740 _req->dma = pci_map_single(dev->pdev, _req->buf, _req->length,
741 ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
746 VDBG(dev, "%s queue req %p, len %u buf %p\n",
747 _ep->name, _req, _req->length, _req->buf);
750 spin_lock_irqsave(&dev->lock, flags);
752 _req->status = -EINPROGRESS;
755 /* for ep0 IN without premature status, zlp is required and
756 * writing EOP starts the status stage (OUT).
758 if (unlikely(ep->num == 0 && ep->is_in))
761 /* kickstart this i/o queue? */
763 if (list_empty(&ep->queue) && likely(!ep->stopped)) {
764 /* dma: done after dma completion IRQ (or error)
765 * pio: done after last fifo operation
768 status = start_dma(ep, req);
770 status = (ep->is_in ? write_fifo : read_fifo)(ep, req);
772 if (unlikely(status != 0)) {
778 } /* else pio or dma irq handler advances the queue. */
780 if (likely(req != 0))
781 list_add_tail(&req->queue, &ep->queue);
783 if (likely(!list_empty(&ep->queue))
784 && likely(ep->num != 0)
786 && !(dev->int_enable & INT_EPxDATASET (ep->num)))
787 pio_irq_enable(dev, dev->regs, ep->num);
789 spin_unlock_irqrestore(&dev->lock, flags);
791 /* pci writes may still be posted */
795 /* dequeue ALL requests */
796 static void nuke(struct goku_ep *ep, int status)
798 struct goku_request *req;
801 if (list_empty(&ep->queue))
804 abort_dma(ep, status);
805 while (!list_empty(&ep->queue)) {
806 req = list_entry(ep->queue.next, struct goku_request, queue);
807 done(ep, req, status);
811 /* dequeue JUST ONE request */
812 static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req)
814 struct goku_request *req;
816 struct goku_udc *dev;
819 ep = container_of(_ep, struct goku_ep, ep);
820 if (!_ep || !_req || (!ep->desc && ep->num != 0))
826 /* we can't touch (dma) registers when suspended */
827 if (dev->ep0state == EP0_SUSPEND)
830 VDBG(dev, "%s %s %s %s %p\n", __func__, _ep->name,
831 ep->is_in ? "IN" : "OUT",
832 ep->dma ? "dma" : "pio",
835 spin_lock_irqsave(&dev->lock, flags);
837 /* make sure it's actually queued on this endpoint */
838 list_for_each_entry (req, &ep->queue, queue) {
839 if (&req->req == _req)
842 if (&req->req != _req) {
843 spin_unlock_irqrestore (&dev->lock, flags);
847 if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) {
848 abort_dma(ep, -ECONNRESET);
849 done(ep, req, -ECONNRESET);
850 dma_advance(dev, ep);
851 } else if (!list_empty(&req->queue))
852 done(ep, req, -ECONNRESET);
855 spin_unlock_irqrestore(&dev->lock, flags);
857 return req ? 0 : -EOPNOTSUPP;
860 /*-------------------------------------------------------------------------*/
862 static void goku_clear_halt(struct goku_ep *ep)
864 // assert (ep->num !=0)
865 VDBG(ep->dev, "%s clear halt\n", ep->ep.name);
866 command(ep->dev->regs, COMMAND_SETDATA0, ep->num);
867 command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num);
871 struct goku_request *req;
873 if (list_empty(&ep->queue))
875 req = list_entry(ep->queue.next, struct goku_request,
877 (void) start_dma(ep, req);
883 static int goku_set_halt(struct usb_ep *_ep, int value)
891 ep = container_of (_ep, struct goku_ep, ep);
895 ep->dev->ep0state = EP0_STALL;
896 ep->dev->ep[0].stopped = 1;
900 /* don't change EPxSTATUS_EP_INVALID to READY */
901 } else if (!ep->desc) {
902 DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name);
906 spin_lock_irqsave(&ep->dev->lock, flags);
907 if (!list_empty(&ep->queue))
909 else if (ep->is_in && value
910 /* data in (either) packet buffer? */
911 && (readl(&ep->dev->regs->DataSet)
912 & DATASET_AB(ep->num)))
918 VDBG(ep->dev, "%s set halt\n", ep->ep.name);
919 command(ep->dev->regs, COMMAND_STALL, ep->num);
920 readl(ep->reg_status);
922 spin_unlock_irqrestore(&ep->dev->lock, flags);
926 static int goku_fifo_status(struct usb_ep *_ep)
929 struct goku_udc_regs __iomem *regs;
934 ep = container_of(_ep, struct goku_ep, ep);
936 /* size is only reported sanely for OUT */
940 /* ignores 16-byte dma buffer; SizeH == 0 */
941 regs = ep->dev->regs;
942 size = readl(®s->EPxSizeLA[ep->num]) & DATASIZE;
943 size += readl(®s->EPxSizeLB[ep->num]) & DATASIZE;
944 VDBG(ep->dev, "%s %s %u\n", __func__, ep->ep.name, size);
948 static void goku_fifo_flush(struct usb_ep *_ep)
951 struct goku_udc_regs __iomem *regs;
956 ep = container_of(_ep, struct goku_ep, ep);
957 VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name);
959 /* don't change EPxSTATUS_EP_INVALID to READY */
960 if (!ep->desc && ep->num != 0) {
961 DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name);
965 regs = ep->dev->regs;
966 size = readl(®s->EPxSizeLA[ep->num]);
969 /* Non-desirable behavior: FIFO_CLEAR also clears the
970 * endpoint halt feature. For OUT, we _could_ just read
971 * the bytes out (PIO, if !ep->dma); for in, no choice.
974 command(regs, COMMAND_FIFO_CLEAR, ep->num);
977 static struct usb_ep_ops goku_ep_ops = {
978 .enable = goku_ep_enable,
979 .disable = goku_ep_disable,
981 .alloc_request = goku_alloc_request,
982 .free_request = goku_free_request,
985 .dequeue = goku_dequeue,
987 .set_halt = goku_set_halt,
988 .fifo_status = goku_fifo_status,
989 .fifo_flush = goku_fifo_flush,
992 /*-------------------------------------------------------------------------*/
994 static int goku_get_frame(struct usb_gadget *_gadget)
999 static const struct usb_gadget_ops goku_ops = {
1000 .get_frame = goku_get_frame,
1005 /*-------------------------------------------------------------------------*/
1007 static inline char *dmastr(void)
1010 return "(dma disabled)";
1011 else if (use_dma == 2)
1012 return "(dma IN and OUT)";
1017 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1019 static const char proc_node_name [] = "driver/udc";
1021 #define FOURBITS "%s%s%s%s"
1022 #define EIGHTBITS FOURBITS FOURBITS
1025 dump_intmask(const char *label, u32 mask, char **next, unsigned *size)
1029 /* int_status is the same format ... */
1030 t = scnprintf(*next, *size,
1031 "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n",
1033 (mask & INT_PWRDETECT) ? " power" : "",
1034 (mask & INT_SYSERROR) ? " sys" : "",
1035 (mask & INT_MSTRDEND) ? " in-dma" : "",
1036 (mask & INT_MSTWRTMOUT) ? " wrtmo" : "",
1038 (mask & INT_MSTWREND) ? " out-dma" : "",
1039 (mask & INT_MSTWRSET) ? " wrset" : "",
1040 (mask & INT_ERR) ? " err" : "",
1041 (mask & INT_SOF) ? " sof" : "",
1043 (mask & INT_EP3NAK) ? " ep3nak" : "",
1044 (mask & INT_EP2NAK) ? " ep2nak" : "",
1045 (mask & INT_EP1NAK) ? " ep1nak" : "",
1046 (mask & INT_EP3DATASET) ? " ep3" : "",
1048 (mask & INT_EP2DATASET) ? " ep2" : "",
1049 (mask & INT_EP1DATASET) ? " ep1" : "",
1050 (mask & INT_STATUSNAK) ? " ep0snak" : "",
1051 (mask & INT_STATUS) ? " ep0status" : "",
1053 (mask & INT_SETUP) ? " setup" : "",
1054 (mask & INT_ENDPOINT0) ? " ep0" : "",
1055 (mask & INT_USBRESET) ? " reset" : "",
1056 (mask & INT_SUSPEND) ? " suspend" : "");
1063 udc_proc_read(char *buffer, char **start, off_t off, int count,
1064 int *eof, void *_dev)
1067 struct goku_udc *dev = _dev;
1068 struct goku_udc_regs __iomem *regs = dev->regs;
1070 unsigned size = count;
1071 unsigned long flags;
1072 int i, t, is_usb_connected;
1078 local_irq_save(flags);
1080 /* basic device status */
1081 tmp = readl(®s->power_detect);
1082 is_usb_connected = tmp & PW_DETECT;
1083 t = scnprintf(next, size,
1085 "%s version: %s %s\n"
1086 "Gadget driver: %s\n"
1089 pci_name(dev->pdev), driver_desc,
1090 driver_name, DRIVER_VERSION, dmastr(),
1091 dev->driver ? dev->driver->driver.name : "(none)",
1093 ? ((tmp & PW_PULLUP) ? "full speed" : "powered")
1096 switch(dev->ep0state){
1097 case EP0_DISCONNECT: state = "ep0_disconnect"; break;
1098 case EP0_IDLE: state = "ep0_idle"; break;
1099 case EP0_IN: state = "ep0_in"; break;
1100 case EP0_OUT: state = "ep0_out"; break;
1101 case EP0_STATUS: state = "ep0_status"; break;
1102 case EP0_STALL: state = "ep0_stall"; break;
1103 case EP0_SUSPEND: state = "ep0_suspend"; break;
1104 default: state = "ep0_?"; break;
1110 dump_intmask("int_status", readl(®s->int_status), &next, &size);
1111 dump_intmask("int_enable", readl(®s->int_enable), &next, &size);
1113 if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0)
1116 /* registers for (active) device and ep0 */
1117 t = scnprintf(next, size, "\nirqs %lu\ndataset %02x "
1118 "single.bcs %02x.%02x state %x addr %u\n",
1119 dev->irqs, readl(®s->DataSet),
1120 readl(®s->EPxSingle), readl(®s->EPxBCS),
1121 readl(®s->UsbState),
1122 readl(®s->address));
1126 tmp = readl(®s->dma_master);
1127 t = scnprintf(next, size,
1128 "dma %03X =" EIGHTBITS "%s %s\n", tmp,
1129 (tmp & MST_EOPB_DIS) ? " eopb-" : "",
1130 (tmp & MST_EOPB_ENA) ? " eopb+" : "",
1131 (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "",
1132 (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "",
1134 (tmp & MST_RD_EOPB) ? " eopb" : "",
1135 (tmp & MST_RD_RESET) ? " in_reset" : "",
1136 (tmp & MST_WR_RESET) ? " out_reset" : "",
1137 (tmp & MST_RD_ENA) ? " IN" : "",
1139 (tmp & MST_WR_ENA) ? " OUT" : "",
1140 (tmp & MST_CONNECTION)
1146 /* dump endpoint queues */
1147 for (i = 0; i < 4; i++) {
1148 struct goku_ep *ep = &dev->ep [i];
1149 struct goku_request *req;
1154 tmp = readl(ep->reg_status);
1155 t = scnprintf(next, size,
1156 "%s %s max %u %s, irqs %lu, "
1157 "status %02x (%s) " FOURBITS "\n",
1159 ep->is_in ? "in" : "out",
1161 ep->dma ? "dma" : "pio",
1164 switch (tmp & EPxSTATUS_EP_MASK) {
1165 case EPxSTATUS_EP_READY:
1167 case EPxSTATUS_EP_DATAIN:
1168 s = "packet"; break;
1169 case EPxSTATUS_EP_FULL:
1171 case EPxSTATUS_EP_TX_ERR: // host will retry
1172 s = "tx_err"; break;
1173 case EPxSTATUS_EP_RX_ERR:
1174 s = "rx_err"; break;
1175 case EPxSTATUS_EP_BUSY: /* ep0 only */
1177 case EPxSTATUS_EP_STALL:
1179 case EPxSTATUS_EP_INVALID: // these "can't happen"
1180 s = "invalid"; break;
1184 (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0",
1185 (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "",
1186 (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "",
1187 (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : ""
1189 if (t <= 0 || t > size)
1194 if (list_empty(&ep->queue)) {
1195 t = scnprintf(next, size, "\t(nothing queued)\n");
1196 if (t <= 0 || t > size)
1202 list_for_each_entry(req, &ep->queue, queue) {
1203 if (ep->dma && req->queue.prev == &ep->queue) {
1204 if (i == UDC_MSTRD_ENDPOINT)
1205 tmp = readl(®s->in_dma_current);
1207 tmp = readl(®s->out_dma_current);
1208 tmp -= req->req.dma;
1211 tmp = req->req.actual;
1213 t = scnprintf(next, size,
1214 "\treq %p len %u/%u buf %p\n",
1215 &req->req, tmp, req->req.length,
1217 if (t <= 0 || t > size)
1225 local_irq_restore(flags);
1227 return count - size;
1230 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
1232 /*-------------------------------------------------------------------------*/
1234 static void udc_reinit (struct goku_udc *dev)
1236 static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" };
1240 INIT_LIST_HEAD (&dev->gadget.ep_list);
1241 dev->gadget.ep0 = &dev->ep [0].ep;
1242 dev->gadget.speed = USB_SPEED_UNKNOWN;
1243 dev->ep0state = EP0_DISCONNECT;
1246 for (i = 0; i < 4; i++) {
1247 struct goku_ep *ep = &dev->ep[i];
1250 ep->ep.name = names[i];
1251 ep->reg_fifo = &dev->regs->ep_fifo [i];
1252 ep->reg_status = &dev->regs->ep_status [i];
1253 ep->reg_mode = &dev->regs->ep_mode[i];
1255 ep->ep.ops = &goku_ep_ops;
1256 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1258 INIT_LIST_HEAD (&ep->queue);
1263 dev->ep[0].reg_mode = NULL;
1264 dev->ep[0].ep.maxpacket = MAX_EP0_SIZE;
1265 list_del_init (&dev->ep[0].ep.ep_list);
1268 static void udc_reset(struct goku_udc *dev)
1270 struct goku_udc_regs __iomem *regs = dev->regs;
1272 writel(0, ®s->power_detect);
1273 writel(0, ®s->int_enable);
1274 readl(®s->int_enable);
1275 dev->int_enable = 0;
1277 /* deassert reset, leave USB D+ at hi-Z (no pullup)
1278 * don't let INT_PWRDETECT sequence begin
1281 writel(PW_RESETB, ®s->power_detect);
1282 readl(®s->int_enable);
1285 static void ep0_start(struct goku_udc *dev)
1287 struct goku_udc_regs __iomem *regs = dev->regs;
1290 VDBG(dev, "%s\n", __func__);
1294 //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master);
1296 /* hw handles set_address, set_feature, get_status; maybe more */
1297 writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF
1298 | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF
1299 | G_REQMODE_GET_DESC
1300 | G_REQMODE_CLEAR_FEAT
1303 for (i = 0; i < 4; i++)
1304 dev->ep[i].irqs = 0;
1306 /* can't modify descriptors after writing UsbReady */
1307 for (i = 0; i < DESC_LEN; i++)
1308 writel(0, ®s->descriptors[i]);
1309 writel(0, ®s->UsbReady);
1311 /* expect ep0 requests when the host drops reset */
1312 writel(PW_RESETB | PW_PULLUP, ®s->power_detect);
1313 dev->int_enable = INT_DEVWIDE | INT_EP0;
1314 writel(dev->int_enable, &dev->regs->int_enable);
1315 readl(®s->int_enable);
1316 dev->gadget.speed = USB_SPEED_FULL;
1317 dev->ep0state = EP0_IDLE;
1320 static void udc_enable(struct goku_udc *dev)
1322 /* start enumeration now, or after power detect irq */
1323 if (readl(&dev->regs->power_detect) & PW_DETECT)
1326 DBG(dev, "%s\n", __func__);
1327 dev->int_enable = INT_PWRDETECT;
1328 writel(dev->int_enable, &dev->regs->int_enable);
1332 /*-------------------------------------------------------------------------*/
1334 /* keeping it simple:
1335 * - one bus driver, initted first;
1336 * - one function driver, initted second
1339 static struct goku_udc *the_controller;
1341 /* when a driver is successfully registered, it will receive
1342 * control requests including set_configuration(), which enables
1343 * non-control requests. then usb traffic follows until a
1344 * disconnect is reported. then a host may connect again, or
1345 * the driver might get unbound.
1347 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
1348 int (*bind)(struct usb_gadget *))
1350 struct goku_udc *dev = the_controller;
1354 || driver->speed < USB_SPEED_FULL
1356 || !driver->disconnect
1364 /* hook up the driver */
1365 driver->driver.bus = NULL;
1366 dev->driver = driver;
1367 dev->gadget.dev.driver = &driver->driver;
1368 retval = bind(&dev->gadget);
1370 DBG(dev, "bind to driver %s --> error %d\n",
1371 driver->driver.name, retval);
1373 dev->gadget.dev.driver = NULL;
1377 /* then enable host detection and ep0; and we're ready
1378 * for set_configuration as well as eventual disconnect.
1382 DBG(dev, "registered gadget driver '%s'\n", driver->driver.name);
1385 EXPORT_SYMBOL(usb_gadget_probe_driver);
1388 stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver)
1392 DBG (dev, "%s\n", __func__);
1394 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1397 /* disconnect gadget driver after quiesceing hw and the driver */
1399 for (i = 0; i < 4; i++)
1400 nuke(&dev->ep [i], -ESHUTDOWN);
1402 spin_unlock(&dev->lock);
1403 driver->disconnect(&dev->gadget);
1404 spin_lock(&dev->lock);
1411 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1413 struct goku_udc *dev = the_controller;
1414 unsigned long flags;
1418 if (!driver || driver != dev->driver || !driver->unbind)
1421 spin_lock_irqsave(&dev->lock, flags);
1423 stop_activity(dev, driver);
1424 spin_unlock_irqrestore(&dev->lock, flags);
1426 driver->unbind(&dev->gadget);
1427 dev->gadget.dev.driver = NULL;
1429 DBG(dev, "unregistered driver '%s'\n", driver->driver.name);
1432 EXPORT_SYMBOL(usb_gadget_unregister_driver);
1435 /*-------------------------------------------------------------------------*/
1437 static void ep0_setup(struct goku_udc *dev)
1439 struct goku_udc_regs __iomem *regs = dev->regs;
1440 struct usb_ctrlrequest ctrl;
1443 /* read SETUP packet and enter DATA stage */
1444 ctrl.bRequestType = readl(®s->bRequestType);
1445 ctrl.bRequest = readl(®s->bRequest);
1446 ctrl.wValue = cpu_to_le16((readl(®s->wValueH) << 8)
1447 | readl(®s->wValueL));
1448 ctrl.wIndex = cpu_to_le16((readl(®s->wIndexH) << 8)
1449 | readl(®s->wIndexL));
1450 ctrl.wLength = cpu_to_le16((readl(®s->wLengthH) << 8)
1451 | readl(®s->wLengthL));
1452 writel(0, ®s->SetupRecv);
1454 nuke(&dev->ep[0], 0);
1455 dev->ep[0].stopped = 0;
1456 if (likely(ctrl.bRequestType & USB_DIR_IN)) {
1457 dev->ep[0].is_in = 1;
1458 dev->ep0state = EP0_IN;
1459 /* detect early status stages */
1460 writel(ICONTROL_STATUSNAK, &dev->regs->IntControl);
1462 dev->ep[0].is_in = 0;
1463 dev->ep0state = EP0_OUT;
1465 /* NOTE: CLEAR_FEATURE is done in software so that we can
1466 * synchronize transfer restarts after bulk IN stalls. data
1467 * won't even enter the fifo until the halt is cleared.
1469 switch (ctrl.bRequest) {
1470 case USB_REQ_CLEAR_FEATURE:
1471 switch (ctrl.bRequestType) {
1472 case USB_RECIP_ENDPOINT:
1473 tmp = le16_to_cpu(ctrl.wIndex) & 0x0f;
1474 /* active endpoint */
1475 if (tmp > 3 || (!dev->ep[tmp].desc && tmp != 0))
1477 if (ctrl.wIndex & cpu_to_le16(
1479 if (!dev->ep[tmp].is_in)
1482 if (dev->ep[tmp].is_in)
1485 if (ctrl.wValue != cpu_to_le16(
1489 goku_clear_halt(&dev->ep[tmp]);
1491 /* start ep0out status stage */
1492 writel(~(1<<0), ®s->EOP);
1493 dev->ep[0].stopped = 1;
1494 dev->ep0state = EP0_STATUS;
1496 case USB_RECIP_DEVICE:
1497 /* device remote wakeup: always clear */
1498 if (ctrl.wValue != cpu_to_le16(1))
1500 VDBG(dev, "clear dev remote wakeup\n");
1502 case USB_RECIP_INTERFACE:
1504 default: /* pass to gadget driver */
1514 VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
1515 ctrl.bRequestType, ctrl.bRequest,
1516 le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex),
1517 le16_to_cpu(ctrl.wLength));
1520 /* hw wants to know when we're configured (or not) */
1521 dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION
1522 && ctrl.bRequestType == USB_RECIP_DEVICE);
1523 if (unlikely(dev->req_config))
1524 dev->configured = (ctrl.wValue != cpu_to_le16(0));
1526 /* delegate everything to the gadget driver.
1527 * it may respond after this irq handler returns.
1529 spin_unlock (&dev->lock);
1530 tmp = dev->driver->setup(&dev->gadget, &ctrl);
1531 spin_lock (&dev->lock);
1532 if (unlikely(tmp < 0)) {
1535 VDBG(dev, "req %02x.%02x protocol STALL; err %d\n",
1536 ctrl.bRequestType, ctrl.bRequest, tmp);
1538 command(regs, COMMAND_STALL, 0);
1539 dev->ep[0].stopped = 1;
1540 dev->ep0state = EP0_STALL;
1543 /* expect at least one data or status stage irq */
1546 #define ACK(irqbit) { \
1548 writel(~irqbit, ®s->int_status); \
1552 static irqreturn_t goku_irq(int irq, void *_dev)
1554 struct goku_udc *dev = _dev;
1555 struct goku_udc_regs __iomem *regs = dev->regs;
1557 u32 stat, handled = 0;
1558 unsigned i, rescans = 5;
1560 spin_lock(&dev->lock);
1563 stat = readl(®s->int_status) & dev->int_enable;
1568 /* device-wide irqs */
1569 if (unlikely(stat & INT_DEVWIDE)) {
1570 if (stat & INT_SYSERROR) {
1571 ERROR(dev, "system error\n");
1572 stop_activity(dev, dev->driver);
1575 // FIXME have a neater way to prevent re-enumeration
1579 if (stat & INT_PWRDETECT) {
1580 writel(~stat, ®s->int_status);
1581 if (readl(&dev->regs->power_detect) & PW_DETECT) {
1582 VDBG(dev, "connect\n");
1585 DBG(dev, "disconnect\n");
1586 if (dev->gadget.speed == USB_SPEED_FULL)
1587 stop_activity(dev, dev->driver);
1588 dev->ep0state = EP0_DISCONNECT;
1589 dev->int_enable = INT_DEVWIDE;
1590 writel(dev->int_enable, &dev->regs->int_enable);
1596 if (stat & INT_SUSPEND) {
1598 if (readl(®s->ep_status[0]) & EPxSTATUS_SUSPEND) {
1599 switch (dev->ep0state) {
1600 case EP0_DISCONNECT:
1606 DBG(dev, "USB suspend\n");
1607 dev->ep0state = EP0_SUSPEND;
1608 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1610 && dev->driver->suspend) {
1611 spin_unlock(&dev->lock);
1612 dev->driver->suspend(&dev->gadget);
1613 spin_lock(&dev->lock);
1616 if (dev->ep0state != EP0_SUSPEND) {
1617 DBG(dev, "bogus USB resume %d\n",
1621 DBG(dev, "USB resume\n");
1622 dev->ep0state = EP0_IDLE;
1623 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1625 && dev->driver->resume) {
1626 spin_unlock(&dev->lock);
1627 dev->driver->resume(&dev->gadget);
1628 spin_lock(&dev->lock);
1633 if (stat & INT_USBRESET) { /* hub reset done */
1635 INFO(dev, "USB reset done, gadget %s\n",
1636 dev->driver->driver.name);
1638 // and INT_ERR on some endpoint's crc/bitstuff/... problem
1641 /* progress ep0 setup, data, or status stages.
1642 * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs
1644 if (stat & INT_SETUP) {
1649 if (stat & INT_STATUSNAK) {
1650 ACK(INT_STATUSNAK|INT_ENDPOINT0);
1651 if (dev->ep0state == EP0_IN) {
1655 writel(~(1<<0), ®s->EOP);
1656 dev->ep0state = EP0_STATUS;
1659 if (stat & INT_ENDPOINT0) {
1666 /* dma completion */
1667 if (stat & INT_MSTRDEND) { /* IN */
1669 ep = &dev->ep[UDC_MSTRD_ENDPOINT];
1671 dma_advance(dev, ep);
1673 if (stat & INT_MSTWREND) { /* OUT */
1675 ep = &dev->ep[UDC_MSTWR_ENDPOINT];
1677 dma_advance(dev, ep);
1679 if (stat & INT_MSTWRTMOUT) { /* OUT */
1680 ACK(INT_MSTWRTMOUT);
1681 ep = &dev->ep[UDC_MSTWR_ENDPOINT];
1683 ERROR(dev, "%s write timeout ?\n", ep->ep.name);
1684 // reset dma? then dma_advance()
1688 for (i = 1; i < 4; i++) {
1689 u32 tmp = INT_EPxDATASET(i);
1695 if (list_empty (&ep->queue))
1696 pio_irq_disable(dev, regs, i);
1706 (void)readl(®s->int_enable);
1707 spin_unlock(&dev->lock);
1709 DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat,
1710 readl(®s->int_status), dev->int_enable);
1711 return IRQ_RETVAL(handled);
1716 /*-------------------------------------------------------------------------*/
1718 static void gadget_release(struct device *_dev)
1720 struct goku_udc *dev = dev_get_drvdata(_dev);
1725 /* tear down the binding between this driver and the pci device */
1727 static void goku_remove(struct pci_dev *pdev)
1729 struct goku_udc *dev = pci_get_drvdata(pdev);
1731 DBG(dev, "%s\n", __func__);
1733 BUG_ON(dev->driver);
1735 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1736 remove_proc_entry(proc_node_name, NULL);
1741 free_irq(pdev->irq, dev);
1744 if (dev->got_region)
1745 release_mem_region(pci_resource_start (pdev, 0),
1746 pci_resource_len (pdev, 0));
1748 pci_disable_device(pdev);
1749 if (dev->registered)
1750 device_unregister(&dev->gadget.dev);
1752 pci_set_drvdata(pdev, NULL);
1754 the_controller = NULL;
1756 INFO(dev, "unbind\n");
1759 /* wrap this driver around the specified pci device, but
1760 * don't respond over USB until a gadget driver binds to us.
1763 static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1765 struct goku_udc *dev = NULL;
1766 unsigned long resource, len;
1767 void __iomem *base = NULL;
1770 /* if you want to support more than one controller in a system,
1771 * usb_gadget_driver_{register,unregister}() must change.
1773 if (the_controller) {
1774 pr_warning("ignoring %s\n", pci_name(pdev));
1778 printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev));
1783 /* alloc, and start init */
1784 dev = kzalloc (sizeof *dev, GFP_KERNEL);
1786 pr_debug("enomem %s\n", pci_name(pdev));
1791 spin_lock_init(&dev->lock);
1793 dev->gadget.ops = &goku_ops;
1795 /* the "gadget" abstracts/virtualizes the controller */
1796 dev_set_name(&dev->gadget.dev, "gadget");
1797 dev->gadget.dev.parent = &pdev->dev;
1798 dev->gadget.dev.dma_mask = pdev->dev.dma_mask;
1799 dev->gadget.dev.release = gadget_release;
1800 dev->gadget.name = driver_name;
1802 /* now all the pci goodies ... */
1803 retval = pci_enable_device(pdev);
1805 DBG(dev, "can't enable, %d\n", retval);
1810 resource = pci_resource_start(pdev, 0);
1811 len = pci_resource_len(pdev, 0);
1812 if (!request_mem_region(resource, len, driver_name)) {
1813 DBG(dev, "controller already in use\n");
1817 dev->got_region = 1;
1819 base = ioremap_nocache(resource, len);
1821 DBG(dev, "can't map memory\n");
1825 dev->regs = (struct goku_udc_regs __iomem *) base;
1827 pci_set_drvdata(pdev, dev);
1828 INFO(dev, "%s\n", driver_desc);
1829 INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr());
1830 INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base);
1832 /* init to known state, then setup irqs */
1835 if (request_irq(pdev->irq, goku_irq, IRQF_SHARED/*|IRQF_SAMPLE_RANDOM*/,
1836 driver_name, dev) != 0) {
1837 DBG(dev, "request interrupt %d failed\n", pdev->irq);
1843 pci_set_master(pdev);
1846 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1847 create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev);
1850 the_controller = dev;
1851 retval = device_register(&dev->gadget.dev);
1853 put_device(&dev->gadget.dev);
1856 dev->registered = 1;
1866 /*-------------------------------------------------------------------------*/
1868 static const struct pci_device_id pci_ids[] = { {
1869 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
1871 .vendor = 0x102f, /* Toshiba */
1872 .device = 0x0107, /* this UDC */
1873 .subvendor = PCI_ANY_ID,
1874 .subdevice = PCI_ANY_ID,
1876 }, { /* end: all zeroes */ }
1878 MODULE_DEVICE_TABLE (pci, pci_ids);
1880 static struct pci_driver goku_pci_driver = {
1881 .name = (char *) driver_name,
1882 .id_table = pci_ids,
1884 .probe = goku_probe,
1885 .remove = goku_remove,
1887 /* FIXME add power management support */
1890 static int __init init (void)
1892 return pci_register_driver (&goku_pci_driver);
1896 static void __exit cleanup (void)
1898 pci_unregister_driver (&goku_pci_driver);
1900 module_exit (cleanup);