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/unaligned.h>
51 #define DRIVER_DESC "TC86C001 USB Device Controller"
52 #define DRIVER_VERSION "30-Oct 2003"
54 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
56 static const char driver_name [] = "goku_udc";
57 static const char driver_desc [] = DRIVER_DESC;
59 MODULE_AUTHOR("source@mvista.com");
60 MODULE_DESCRIPTION(DRIVER_DESC);
61 MODULE_LICENSE("GPL");
65 * IN dma behaves ok under testing, though the IN-dma abort paths don't
66 * seem to behave quite as expected. Used by default.
68 * OUT dma documents design problems handling the common "short packet"
69 * transfer termination policy; it couldn't be enabled by default, even
70 * if the OUT-dma abort problems had a resolution.
72 static unsigned use_dma = 1;
75 //#include <linux/moduleparam.h>
76 /* "modprobe goku_udc use_dma=1" etc
78 * 1 to use IN dma only (normal operation)
79 * 2 to use IN and OUT dma
81 module_param(use_dma, uint, S_IRUGO);
84 /*-------------------------------------------------------------------------*/
86 static void nuke(struct goku_ep *, int status);
89 command(struct goku_udc_regs __iomem *regs, int command, unsigned epnum)
91 writel(COMMAND_EP(epnum) | command, ®s->Command);
96 goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
104 ep = container_of(_ep, struct goku_ep, ep);
106 || desc->bDescriptorType != USB_DT_ENDPOINT)
109 if (ep == &dev->ep[0])
111 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
113 if (ep->num != usb_endpoint_num(desc))
116 switch (usb_endpoint_type(desc)) {
117 case USB_ENDPOINT_XFER_BULK:
118 case USB_ENDPOINT_XFER_INT:
124 if ((readl(ep->reg_status) & EPxSTATUS_EP_MASK)
125 != EPxSTATUS_EP_INVALID)
128 /* enabling the no-toggle interrupt mode would need an api hook */
130 max = get_unaligned_le16(&desc->wMaxPacketSize);
140 mode |= 2 << 1; /* bulk, or intr-with-toggle */
142 /* ep1/ep2 dma direction is chosen early; it works in the other
143 * direction, with pio. be cautious with out-dma.
145 ep->is_in = usb_endpoint_dir_in(desc);
148 ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT);
150 ep->dma = (use_dma == 2) && (ep->num == UDC_MSTWR_ENDPOINT);
152 DBG(dev, "%s out-dma hides short packets\n",
156 spin_lock_irqsave(&ep->dev->lock, flags);
158 /* ep1 and ep2 can do double buffering and/or dma */
160 struct goku_udc_regs __iomem *regs = ep->dev->regs;
163 /* double buffer except (for now) with pio in */
164 tmp = ((ep->dma || !ep->is_in)
165 ? 0x10 /* double buffered */
166 : 0x11 /* single buffer */
168 tmp |= readl(®s->EPxSingle);
169 writel(tmp, ®s->EPxSingle);
171 tmp = (ep->dma ? 0x10/*dma*/ : 0x11/*pio*/) << ep->num;
172 tmp |= readl(®s->EPxBCS);
173 writel(tmp, ®s->EPxBCS);
175 writel(mode, ep->reg_mode);
176 command(ep->dev->regs, COMMAND_RESET, ep->num);
177 ep->ep.maxpacket = max;
180 spin_unlock_irqrestore(&ep->dev->lock, flags);
182 DBG(dev, "enable %s %s %s maxpacket %u\n", ep->ep.name,
183 ep->is_in ? "IN" : "OUT",
184 ep->dma ? "dma" : "pio",
190 static void ep_reset(struct goku_udc_regs __iomem *regs, struct goku_ep *ep)
192 struct goku_udc *dev = ep->dev;
195 command(regs, COMMAND_INVALID, ep->num);
197 if (ep->num == UDC_MSTWR_ENDPOINT)
198 dev->int_enable &= ~(INT_MSTWREND
200 else if (ep->num == UDC_MSTRD_ENDPOINT)
201 dev->int_enable &= ~INT_MSTRDEND;
202 dev->int_enable &= ~INT_EPxDATASET (ep->num);
204 dev->int_enable &= ~INT_EP0;
205 writel(dev->int_enable, ®s->int_enable);
206 readl(®s->int_enable);
208 struct goku_udc_regs __iomem *r = ep->dev->regs;
211 tmp = readl(&r->EPxSingle);
212 tmp &= ~(0x11 << ep->num);
213 writel(tmp, &r->EPxSingle);
215 tmp = readl(&r->EPxBCS);
216 tmp &= ~(0x11 << ep->num);
217 writel(tmp, &r->EPxBCS);
219 /* reset dma in case we're still using it */
223 master = readl(®s->dma_master) & MST_RW_BITS;
224 if (ep->num == UDC_MSTWR_ENDPOINT) {
225 master &= ~MST_W_BITS;
226 master |= MST_WR_RESET;
228 master &= ~MST_R_BITS;
229 master |= MST_RD_RESET;
231 writel(master, ®s->dma_master);
235 ep->ep.maxpacket = MAX_FIFO_SIZE;
242 static int goku_ep_disable(struct usb_ep *_ep)
245 struct goku_udc *dev;
248 ep = container_of(_ep, struct goku_ep, ep);
249 if (!_ep || !ep->ep.desc)
252 if (dev->ep0state == EP0_SUSPEND)
255 VDBG(dev, "disable %s\n", _ep->name);
257 spin_lock_irqsave(&dev->lock, flags);
258 nuke(ep, -ESHUTDOWN);
259 ep_reset(dev->regs, ep);
260 spin_unlock_irqrestore(&dev->lock, flags);
265 /*-------------------------------------------------------------------------*/
267 static struct usb_request *
268 goku_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
270 struct goku_request *req;
274 req = kzalloc(sizeof *req, gfp_flags);
278 req->req.dma = DMA_ADDR_INVALID;
279 INIT_LIST_HEAD(&req->queue);
284 goku_free_request(struct usb_ep *_ep, struct usb_request *_req)
286 struct goku_request *req;
291 req = container_of(_req, struct goku_request, req);
292 WARN_ON(!list_empty(&req->queue));
296 /*-------------------------------------------------------------------------*/
299 done(struct goku_ep *ep, struct goku_request *req, int status)
301 struct goku_udc *dev;
302 unsigned stopped = ep->stopped;
304 list_del_init(&req->queue);
306 if (likely(req->req.status == -EINPROGRESS))
307 req->req.status = status;
309 status = req->req.status;
314 usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in);
317 if (status && status != -ESHUTDOWN)
319 VDBG(dev, "complete %s req %p stat %d len %u/%u\n",
320 ep->ep.name, &req->req, status,
321 req->req.actual, req->req.length);
323 /* don't modify queue heads during completion callback */
325 spin_unlock(&dev->lock);
326 req->req.complete(&ep->ep, &req->req);
327 spin_lock(&dev->lock);
328 ep->stopped = stopped;
331 /*-------------------------------------------------------------------------*/
334 write_packet(u32 __iomem *fifo, u8 *buf, struct goku_request *req, unsigned max)
336 unsigned length, count;
338 length = min(req->req.length - req->req.actual, max);
339 req->req.actual += length;
342 while (likely(count--))
343 writel(*buf++, fifo);
347 // return: 0 = still running, 1 = completed, negative = errno
348 static int write_fifo(struct goku_ep *ep, struct goku_request *req)
350 struct goku_udc *dev = ep->dev;
356 tmp = readl(&dev->regs->DataSet);
357 buf = req->req.buf + req->req.actual;
361 if (unlikely(ep->num == 0 && dev->ep0state != EP0_IN))
364 /* NOTE: just single-buffered PIO-IN for now. */
365 if (unlikely((tmp & DATASET_A(ep->num)) != 0))
368 /* clear our "packet available" irq */
370 writel(~INT_EPxDATASET(ep->num), &dev->regs->int_status);
372 count = write_packet(ep->reg_fifo, buf, req, ep->ep.maxpacket);
374 /* last packet often short (sometimes a zlp, especially on ep0) */
375 if (unlikely(count != ep->ep.maxpacket)) {
376 writel(~(1<<ep->num), &dev->regs->EOP);
378 dev->ep[0].stopped = 1;
379 dev->ep0state = EP0_STATUS;
383 if (likely(req->req.length != req->req.actual)
389 #if 0 /* printk seemed to trash is_last...*/
391 VDBG(dev, "wrote %s %u bytes%s IN %u left %p\n",
392 ep->ep.name, count, is_last ? "/last" : "",
393 req->req.length - req->req.actual, req);
396 /* requests complete when all IN data is in the FIFO,
397 * or sometimes later, if a zlp was needed.
407 static int read_fifo(struct goku_ep *ep, struct goku_request *req)
409 struct goku_udc_regs __iomem *regs;
412 unsigned bufferspace, is_short, dbuff;
414 regs = ep->dev->regs;
416 buf = req->req.buf + req->req.actual;
419 if (unlikely(ep->num == 0 && ep->dev->ep0state != EP0_OUT))
422 dbuff = (ep->num == 1 || ep->num == 2);
424 /* ack dataset irq matching the status we'll handle */
426 writel(~INT_EPxDATASET(ep->num), ®s->int_status);
428 set = readl(®s->DataSet) & DATASET_AB(ep->num);
429 size = readl(®s->EPxSizeLA[ep->num]);
430 bufferspace = req->req.length - req->req.actual;
432 /* usually do nothing without an OUT packet */
433 if (likely(ep->num != 0 || bufferspace != 0)) {
434 if (unlikely(set == 0))
436 /* use ep1/ep2 double-buffering for OUT */
437 if (!(size & PACKET_ACTIVE))
438 size = readl(®s->EPxSizeLB[ep->num]);
439 if (!(size & PACKET_ACTIVE)) /* "can't happen" */
441 size &= DATASIZE; /* EPxSizeH == 0 */
443 /* ep0out no-out-data case for set_config, etc */
447 /* read all bytes from this packet */
448 req->req.actual += size;
449 is_short = (size < ep->ep.maxpacket);
451 VDBG(ep->dev, "read %s %u bytes%s OUT req %p %u/%u\n",
452 ep->ep.name, size, is_short ? "/S" : "",
453 req, req->req.actual, req->req.length);
455 while (likely(size-- != 0)) {
456 u8 byte = (u8) readl(ep->reg_fifo);
458 if (unlikely(bufferspace == 0)) {
459 /* this happens when the driver's buffer
460 * is smaller than what the host sent.
461 * discard the extra data in this packet.
463 if (req->req.status != -EOVERFLOW)
464 DBG(ep->dev, "%s overflow %u\n",
466 req->req.status = -EOVERFLOW;
474 if (unlikely(is_short || req->req.actual == req->req.length)) {
475 if (unlikely(ep->num == 0)) {
476 /* non-control endpoints now usable? */
477 if (ep->dev->req_config)
478 writel(ep->dev->configured
479 ? USBSTATE_CONFIGURED
482 /* ep0out status stage */
483 writel(~(1<<0), ®s->EOP);
485 ep->dev->ep0state = EP0_STATUS;
489 /* empty the second buffer asap */
490 if (dbuff && !list_empty(&ep->queue)) {
491 req = list_entry(ep->queue.next,
492 struct goku_request, queue);
502 pio_irq_enable(struct goku_udc *dev,
503 struct goku_udc_regs __iomem *regs, int epnum)
505 dev->int_enable |= INT_EPxDATASET (epnum);
506 writel(dev->int_enable, ®s->int_enable);
507 /* write may still be posted */
511 pio_irq_disable(struct goku_udc *dev,
512 struct goku_udc_regs __iomem *regs, int epnum)
514 dev->int_enable &= ~INT_EPxDATASET (epnum);
515 writel(dev->int_enable, ®s->int_enable);
516 /* write may still be posted */
520 pio_advance(struct goku_ep *ep)
522 struct goku_request *req;
524 if (unlikely(list_empty (&ep->queue)))
526 req = list_entry(ep->queue.next, struct goku_request, queue);
527 (ep->is_in ? write_fifo : read_fifo)(ep, req);
531 /*-------------------------------------------------------------------------*/
533 // return: 0 = q running, 1 = q stopped, negative = errno
534 static int start_dma(struct goku_ep *ep, struct goku_request *req)
536 struct goku_udc_regs __iomem *regs = ep->dev->regs;
538 u32 start = req->req.dma;
539 u32 end = start + req->req.length - 1;
541 master = readl(®s->dma_master) & MST_RW_BITS;
543 /* re-init the bits affecting IN dma; careful with zlps */
544 if (likely(ep->is_in)) {
545 if (unlikely(master & MST_RD_ENA)) {
546 DBG (ep->dev, "start, IN active dma %03x!!\n",
550 writel(end, ®s->in_dma_end);
551 writel(start, ®s->in_dma_start);
553 master &= ~MST_R_BITS;
554 if (unlikely(req->req.length == 0))
555 master = MST_RD_ENA | MST_RD_EOPB;
556 else if ((req->req.length % ep->ep.maxpacket) != 0
558 master = MST_RD_ENA | MST_EOPB_ENA;
560 master = MST_RD_ENA | MST_EOPB_DIS;
562 ep->dev->int_enable |= INT_MSTRDEND;
564 /* Goku DMA-OUT merges short packets, which plays poorly with
565 * protocols where short packets mark the transfer boundaries.
566 * The chip supports a nonstandard policy with INT_MSTWRTMOUT,
567 * ending transfers after 3 SOFs; we don't turn it on.
570 if (unlikely(master & MST_WR_ENA)) {
571 DBG (ep->dev, "start, OUT active dma %03x!!\n",
575 writel(end, ®s->out_dma_end);
576 writel(start, ®s->out_dma_start);
578 master &= ~MST_W_BITS;
579 master |= MST_WR_ENA | MST_TIMEOUT_DIS;
581 ep->dev->int_enable |= INT_MSTWREND|INT_MSTWRTMOUT;
584 writel(master, ®s->dma_master);
585 writel(ep->dev->int_enable, ®s->int_enable);
589 static void dma_advance(struct goku_udc *dev, struct goku_ep *ep)
591 struct goku_request *req;
592 struct goku_udc_regs __iomem *regs = ep->dev->regs;
595 master = readl(®s->dma_master);
597 if (unlikely(list_empty(&ep->queue))) {
600 dev->int_enable &= ~INT_MSTRDEND;
602 dev->int_enable &= ~(INT_MSTWREND|INT_MSTWRTMOUT);
603 writel(dev->int_enable, ®s->int_enable);
606 req = list_entry(ep->queue.next, struct goku_request, queue);
608 /* normal hw dma completion (not abort) */
609 if (likely(ep->is_in)) {
610 if (unlikely(master & MST_RD_ENA))
612 req->req.actual = readl(®s->in_dma_current);
614 if (unlikely(master & MST_WR_ENA))
617 /* hardware merges short packets, and also hides packet
618 * overruns. a partial packet MAY be in the fifo here.
620 req->req.actual = readl(®s->out_dma_current);
622 req->req.actual -= req->req.dma;
626 VDBG(dev, "done %s %s dma, %u/%u bytes, req %p\n",
627 ep->ep.name, ep->is_in ? "IN" : "OUT",
628 req->req.actual, req->req.length, req);
631 if (list_empty(&ep->queue))
633 req = list_entry(ep->queue.next, struct goku_request, queue);
634 (void) start_dma(ep, req);
637 static void abort_dma(struct goku_ep *ep, int status)
639 struct goku_udc_regs __iomem *regs = ep->dev->regs;
640 struct goku_request *req;
643 /* NAK future host requests, hoping the implicit delay lets the
644 * dma engine finish reading (or writing) its latest packet and
645 * empty the dma buffer (up to 16 bytes).
647 * This avoids needing to clean up a partial packet in the fifo;
648 * we can't do that for IN without side effects to HALT and TOGGLE.
650 command(regs, COMMAND_FIFO_DISABLE, ep->num);
651 req = list_entry(ep->queue.next, struct goku_request, queue);
652 master = readl(®s->dma_master) & MST_RW_BITS;
654 /* FIXME using these resets isn't usably documented. this may
655 * not work unless it's followed by disabling the endpoint.
657 * FIXME the OUT reset path doesn't even behave consistently.
660 if (unlikely((readl(®s->dma_master) & MST_RD_ENA) == 0))
662 curr = readl(®s->in_dma_current);
664 writel(curr, ®s->in_dma_end);
665 writel(curr, ®s->in_dma_start);
667 master &= ~MST_R_BITS;
668 master |= MST_RD_RESET;
669 writel(master, ®s->dma_master);
671 if (readl(®s->dma_master) & MST_RD_ENA)
672 DBG(ep->dev, "IN dma active after reset!\n");
675 if (unlikely((readl(®s->dma_master) & MST_WR_ENA) == 0))
677 curr = readl(®s->out_dma_current);
679 writel(curr, ®s->out_dma_end);
680 writel(curr, ®s->out_dma_start);
682 master &= ~MST_W_BITS;
683 master |= MST_WR_RESET;
684 writel(master, ®s->dma_master);
686 if (readl(®s->dma_master) & MST_WR_ENA)
687 DBG(ep->dev, "OUT dma active after reset!\n");
689 req->req.actual = (curr - req->req.dma) + 1;
690 req->req.status = status;
692 VDBG(ep->dev, "%s %s %s %d/%d\n", __func__, ep->ep.name,
693 ep->is_in ? "IN" : "OUT",
694 req->req.actual, req->req.length);
696 command(regs, COMMAND_FIFO_ENABLE, ep->num);
701 /* dma already completed; no abort needed */
702 command(regs, COMMAND_FIFO_ENABLE, ep->num);
703 req->req.actual = req->req.length;
707 /*-------------------------------------------------------------------------*/
710 goku_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
712 struct goku_request *req;
714 struct goku_udc *dev;
718 /* always require a cpu-view buffer so pio works */
719 req = container_of(_req, struct goku_request, req);
720 if (unlikely(!_req || !_req->complete
721 || !_req->buf || !list_empty(&req->queue)))
723 ep = container_of(_ep, struct goku_ep, ep);
724 if (unlikely(!_ep || (!ep->ep.desc && ep->num != 0)))
727 if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN))
730 /* can't touch registers when suspended */
731 if (dev->ep0state == EP0_SUSPEND)
734 /* set up dma mapping in case the caller didn't */
736 status = usb_gadget_map_request(&dev->gadget, &req->req,
743 VDBG(dev, "%s queue req %p, len %u buf %p\n",
744 _ep->name, _req, _req->length, _req->buf);
747 spin_lock_irqsave(&dev->lock, flags);
749 _req->status = -EINPROGRESS;
752 /* for ep0 IN without premature status, zlp is required and
753 * writing EOP starts the status stage (OUT).
755 if (unlikely(ep->num == 0 && ep->is_in))
758 /* kickstart this i/o queue? */
760 if (list_empty(&ep->queue) && likely(!ep->stopped)) {
761 /* dma: done after dma completion IRQ (or error)
762 * pio: done after last fifo operation
765 status = start_dma(ep, req);
767 status = (ep->is_in ? write_fifo : read_fifo)(ep, req);
769 if (unlikely(status != 0)) {
775 } /* else pio or dma irq handler advances the queue. */
777 if (likely(req != 0))
778 list_add_tail(&req->queue, &ep->queue);
780 if (likely(!list_empty(&ep->queue))
781 && likely(ep->num != 0)
783 && !(dev->int_enable & INT_EPxDATASET (ep->num)))
784 pio_irq_enable(dev, dev->regs, ep->num);
786 spin_unlock_irqrestore(&dev->lock, flags);
788 /* pci writes may still be posted */
792 /* dequeue ALL requests */
793 static void nuke(struct goku_ep *ep, int status)
795 struct goku_request *req;
798 if (list_empty(&ep->queue))
801 abort_dma(ep, status);
802 while (!list_empty(&ep->queue)) {
803 req = list_entry(ep->queue.next, struct goku_request, queue);
804 done(ep, req, status);
808 /* dequeue JUST ONE request */
809 static int goku_dequeue(struct usb_ep *_ep, struct usb_request *_req)
811 struct goku_request *req;
813 struct goku_udc *dev;
816 ep = container_of(_ep, struct goku_ep, ep);
817 if (!_ep || !_req || (!ep->ep.desc && ep->num != 0))
823 /* we can't touch (dma) registers when suspended */
824 if (dev->ep0state == EP0_SUSPEND)
827 VDBG(dev, "%s %s %s %s %p\n", __func__, _ep->name,
828 ep->is_in ? "IN" : "OUT",
829 ep->dma ? "dma" : "pio",
832 spin_lock_irqsave(&dev->lock, flags);
834 /* make sure it's actually queued on this endpoint */
835 list_for_each_entry (req, &ep->queue, queue) {
836 if (&req->req == _req)
839 if (&req->req != _req) {
840 spin_unlock_irqrestore (&dev->lock, flags);
844 if (ep->dma && ep->queue.next == &req->queue && !ep->stopped) {
845 abort_dma(ep, -ECONNRESET);
846 done(ep, req, -ECONNRESET);
847 dma_advance(dev, ep);
848 } else if (!list_empty(&req->queue))
849 done(ep, req, -ECONNRESET);
852 spin_unlock_irqrestore(&dev->lock, flags);
854 return req ? 0 : -EOPNOTSUPP;
857 /*-------------------------------------------------------------------------*/
859 static void goku_clear_halt(struct goku_ep *ep)
861 // assert (ep->num !=0)
862 VDBG(ep->dev, "%s clear halt\n", ep->ep.name);
863 command(ep->dev->regs, COMMAND_SETDATA0, ep->num);
864 command(ep->dev->regs, COMMAND_STALL_CLEAR, ep->num);
868 struct goku_request *req;
870 if (list_empty(&ep->queue))
872 req = list_entry(ep->queue.next, struct goku_request,
874 (void) start_dma(ep, req);
880 static int goku_set_halt(struct usb_ep *_ep, int value)
888 ep = container_of (_ep, struct goku_ep, ep);
892 ep->dev->ep0state = EP0_STALL;
893 ep->dev->ep[0].stopped = 1;
897 /* don't change EPxSTATUS_EP_INVALID to READY */
898 } else if (!ep->ep.desc) {
899 DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name);
903 spin_lock_irqsave(&ep->dev->lock, flags);
904 if (!list_empty(&ep->queue))
906 else if (ep->is_in && value
907 /* data in (either) packet buffer? */
908 && (readl(&ep->dev->regs->DataSet)
909 & DATASET_AB(ep->num)))
915 VDBG(ep->dev, "%s set halt\n", ep->ep.name);
916 command(ep->dev->regs, COMMAND_STALL, ep->num);
917 readl(ep->reg_status);
919 spin_unlock_irqrestore(&ep->dev->lock, flags);
923 static int goku_fifo_status(struct usb_ep *_ep)
926 struct goku_udc_regs __iomem *regs;
931 ep = container_of(_ep, struct goku_ep, ep);
933 /* size is only reported sanely for OUT */
937 /* ignores 16-byte dma buffer; SizeH == 0 */
938 regs = ep->dev->regs;
939 size = readl(®s->EPxSizeLA[ep->num]) & DATASIZE;
940 size += readl(®s->EPxSizeLB[ep->num]) & DATASIZE;
941 VDBG(ep->dev, "%s %s %u\n", __func__, ep->ep.name, size);
945 static void goku_fifo_flush(struct usb_ep *_ep)
948 struct goku_udc_regs __iomem *regs;
953 ep = container_of(_ep, struct goku_ep, ep);
954 VDBG(ep->dev, "%s %s\n", __func__, ep->ep.name);
956 /* don't change EPxSTATUS_EP_INVALID to READY */
957 if (!ep->ep.desc && ep->num != 0) {
958 DBG(ep->dev, "%s %s inactive?\n", __func__, ep->ep.name);
962 regs = ep->dev->regs;
963 size = readl(®s->EPxSizeLA[ep->num]);
966 /* Non-desirable behavior: FIFO_CLEAR also clears the
967 * endpoint halt feature. For OUT, we _could_ just read
968 * the bytes out (PIO, if !ep->dma); for in, no choice.
971 command(regs, COMMAND_FIFO_CLEAR, ep->num);
974 static struct usb_ep_ops goku_ep_ops = {
975 .enable = goku_ep_enable,
976 .disable = goku_ep_disable,
978 .alloc_request = goku_alloc_request,
979 .free_request = goku_free_request,
982 .dequeue = goku_dequeue,
984 .set_halt = goku_set_halt,
985 .fifo_status = goku_fifo_status,
986 .fifo_flush = goku_fifo_flush,
989 /*-------------------------------------------------------------------------*/
991 static int goku_get_frame(struct usb_gadget *_gadget)
996 static int goku_start(struct usb_gadget_driver *driver,
997 int (*bind)(struct usb_gadget *, struct usb_gadget_driver *));
998 static int goku_stop(struct usb_gadget_driver *driver);
1000 static const struct usb_gadget_ops goku_ops = {
1001 .get_frame = goku_get_frame,
1002 .start = goku_start,
1008 /*-------------------------------------------------------------------------*/
1010 static inline char *dmastr(void)
1013 return "(dma disabled)";
1014 else if (use_dma == 2)
1015 return "(dma IN and OUT)";
1020 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1022 static const char proc_node_name [] = "driver/udc";
1024 #define FOURBITS "%s%s%s%s"
1025 #define EIGHTBITS FOURBITS FOURBITS
1028 dump_intmask(const char *label, u32 mask, char **next, unsigned *size)
1032 /* int_status is the same format ... */
1033 t = scnprintf(*next, *size,
1034 "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n",
1036 (mask & INT_PWRDETECT) ? " power" : "",
1037 (mask & INT_SYSERROR) ? " sys" : "",
1038 (mask & INT_MSTRDEND) ? " in-dma" : "",
1039 (mask & INT_MSTWRTMOUT) ? " wrtmo" : "",
1041 (mask & INT_MSTWREND) ? " out-dma" : "",
1042 (mask & INT_MSTWRSET) ? " wrset" : "",
1043 (mask & INT_ERR) ? " err" : "",
1044 (mask & INT_SOF) ? " sof" : "",
1046 (mask & INT_EP3NAK) ? " ep3nak" : "",
1047 (mask & INT_EP2NAK) ? " ep2nak" : "",
1048 (mask & INT_EP1NAK) ? " ep1nak" : "",
1049 (mask & INT_EP3DATASET) ? " ep3" : "",
1051 (mask & INT_EP2DATASET) ? " ep2" : "",
1052 (mask & INT_EP1DATASET) ? " ep1" : "",
1053 (mask & INT_STATUSNAK) ? " ep0snak" : "",
1054 (mask & INT_STATUS) ? " ep0status" : "",
1056 (mask & INT_SETUP) ? " setup" : "",
1057 (mask & INT_ENDPOINT0) ? " ep0" : "",
1058 (mask & INT_USBRESET) ? " reset" : "",
1059 (mask & INT_SUSPEND) ? " suspend" : "");
1066 udc_proc_read(char *buffer, char **start, off_t off, int count,
1067 int *eof, void *_dev)
1070 struct goku_udc *dev = _dev;
1071 struct goku_udc_regs __iomem *regs = dev->regs;
1073 unsigned size = count;
1074 unsigned long flags;
1075 int i, t, is_usb_connected;
1081 local_irq_save(flags);
1083 /* basic device status */
1084 tmp = readl(®s->power_detect);
1085 is_usb_connected = tmp & PW_DETECT;
1086 t = scnprintf(next, size,
1088 "%s version: %s %s\n"
1089 "Gadget driver: %s\n"
1092 pci_name(dev->pdev), driver_desc,
1093 driver_name, DRIVER_VERSION, dmastr(),
1094 dev->driver ? dev->driver->driver.name : "(none)",
1096 ? ((tmp & PW_PULLUP) ? "full speed" : "powered")
1099 switch(dev->ep0state){
1100 case EP0_DISCONNECT: state = "ep0_disconnect"; break;
1101 case EP0_IDLE: state = "ep0_idle"; break;
1102 case EP0_IN: state = "ep0_in"; break;
1103 case EP0_OUT: state = "ep0_out"; break;
1104 case EP0_STATUS: state = "ep0_status"; break;
1105 case EP0_STALL: state = "ep0_stall"; break;
1106 case EP0_SUSPEND: state = "ep0_suspend"; break;
1107 default: state = "ep0_?"; break;
1113 dump_intmask("int_status", readl(®s->int_status), &next, &size);
1114 dump_intmask("int_enable", readl(®s->int_enable), &next, &size);
1116 if (!is_usb_connected || !dev->driver || (tmp & PW_PULLUP) == 0)
1119 /* registers for (active) device and ep0 */
1120 t = scnprintf(next, size, "\nirqs %lu\ndataset %02x "
1121 "single.bcs %02x.%02x state %x addr %u\n",
1122 dev->irqs, readl(®s->DataSet),
1123 readl(®s->EPxSingle), readl(®s->EPxBCS),
1124 readl(®s->UsbState),
1125 readl(®s->address));
1129 tmp = readl(®s->dma_master);
1130 t = scnprintf(next, size,
1131 "dma %03X =" EIGHTBITS "%s %s\n", tmp,
1132 (tmp & MST_EOPB_DIS) ? " eopb-" : "",
1133 (tmp & MST_EOPB_ENA) ? " eopb+" : "",
1134 (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "",
1135 (tmp & MST_TIMEOUT_ENA) ? " tmo+" : "",
1137 (tmp & MST_RD_EOPB) ? " eopb" : "",
1138 (tmp & MST_RD_RESET) ? " in_reset" : "",
1139 (tmp & MST_WR_RESET) ? " out_reset" : "",
1140 (tmp & MST_RD_ENA) ? " IN" : "",
1142 (tmp & MST_WR_ENA) ? " OUT" : "",
1143 (tmp & MST_CONNECTION)
1149 /* dump endpoint queues */
1150 for (i = 0; i < 4; i++) {
1151 struct goku_ep *ep = &dev->ep [i];
1152 struct goku_request *req;
1154 if (i && !ep->ep.desc)
1157 tmp = readl(ep->reg_status);
1158 t = scnprintf(next, size,
1159 "%s %s max %u %s, irqs %lu, "
1160 "status %02x (%s) " FOURBITS "\n",
1162 ep->is_in ? "in" : "out",
1164 ep->dma ? "dma" : "pio",
1167 switch (tmp & EPxSTATUS_EP_MASK) {
1168 case EPxSTATUS_EP_READY:
1170 case EPxSTATUS_EP_DATAIN:
1171 s = "packet"; break;
1172 case EPxSTATUS_EP_FULL:
1174 case EPxSTATUS_EP_TX_ERR: // host will retry
1175 s = "tx_err"; break;
1176 case EPxSTATUS_EP_RX_ERR:
1177 s = "rx_err"; break;
1178 case EPxSTATUS_EP_BUSY: /* ep0 only */
1180 case EPxSTATUS_EP_STALL:
1182 case EPxSTATUS_EP_INVALID: // these "can't happen"
1183 s = "invalid"; break;
1187 (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0",
1188 (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "",
1189 (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "",
1190 (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : ""
1192 if (t <= 0 || t > size)
1197 if (list_empty(&ep->queue)) {
1198 t = scnprintf(next, size, "\t(nothing queued)\n");
1199 if (t <= 0 || t > size)
1205 list_for_each_entry(req, &ep->queue, queue) {
1206 if (ep->dma && req->queue.prev == &ep->queue) {
1207 if (i == UDC_MSTRD_ENDPOINT)
1208 tmp = readl(®s->in_dma_current);
1210 tmp = readl(®s->out_dma_current);
1211 tmp -= req->req.dma;
1214 tmp = req->req.actual;
1216 t = scnprintf(next, size,
1217 "\treq %p len %u/%u buf %p\n",
1218 &req->req, tmp, req->req.length,
1220 if (t <= 0 || t > size)
1228 local_irq_restore(flags);
1230 return count - size;
1233 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
1235 /*-------------------------------------------------------------------------*/
1237 static void udc_reinit (struct goku_udc *dev)
1239 static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" };
1243 INIT_LIST_HEAD (&dev->gadget.ep_list);
1244 dev->gadget.ep0 = &dev->ep [0].ep;
1245 dev->gadget.speed = USB_SPEED_UNKNOWN;
1246 dev->ep0state = EP0_DISCONNECT;
1249 for (i = 0; i < 4; i++) {
1250 struct goku_ep *ep = &dev->ep[i];
1253 ep->ep.name = names[i];
1254 ep->reg_fifo = &dev->regs->ep_fifo [i];
1255 ep->reg_status = &dev->regs->ep_status [i];
1256 ep->reg_mode = &dev->regs->ep_mode[i];
1258 ep->ep.ops = &goku_ep_ops;
1259 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1261 INIT_LIST_HEAD (&ep->queue);
1266 dev->ep[0].reg_mode = NULL;
1267 dev->ep[0].ep.maxpacket = MAX_EP0_SIZE;
1268 list_del_init (&dev->ep[0].ep.ep_list);
1271 static void udc_reset(struct goku_udc *dev)
1273 struct goku_udc_regs __iomem *regs = dev->regs;
1275 writel(0, ®s->power_detect);
1276 writel(0, ®s->int_enable);
1277 readl(®s->int_enable);
1278 dev->int_enable = 0;
1280 /* deassert reset, leave USB D+ at hi-Z (no pullup)
1281 * don't let INT_PWRDETECT sequence begin
1284 writel(PW_RESETB, ®s->power_detect);
1285 readl(®s->int_enable);
1288 static void ep0_start(struct goku_udc *dev)
1290 struct goku_udc_regs __iomem *regs = dev->regs;
1293 VDBG(dev, "%s\n", __func__);
1297 //writel(MST_EOPB_ENA | MST_TIMEOUT_ENA, ®s->dma_master);
1299 /* hw handles set_address, set_feature, get_status; maybe more */
1300 writel( G_REQMODE_SET_INTF | G_REQMODE_GET_INTF
1301 | G_REQMODE_SET_CONF | G_REQMODE_GET_CONF
1302 | G_REQMODE_GET_DESC
1303 | G_REQMODE_CLEAR_FEAT
1306 for (i = 0; i < 4; i++)
1307 dev->ep[i].irqs = 0;
1309 /* can't modify descriptors after writing UsbReady */
1310 for (i = 0; i < DESC_LEN; i++)
1311 writel(0, ®s->descriptors[i]);
1312 writel(0, ®s->UsbReady);
1314 /* expect ep0 requests when the host drops reset */
1315 writel(PW_RESETB | PW_PULLUP, ®s->power_detect);
1316 dev->int_enable = INT_DEVWIDE | INT_EP0;
1317 writel(dev->int_enable, &dev->regs->int_enable);
1318 readl(®s->int_enable);
1319 dev->gadget.speed = USB_SPEED_FULL;
1320 dev->ep0state = EP0_IDLE;
1323 static void udc_enable(struct goku_udc *dev)
1325 /* start enumeration now, or after power detect irq */
1326 if (readl(&dev->regs->power_detect) & PW_DETECT)
1329 DBG(dev, "%s\n", __func__);
1330 dev->int_enable = INT_PWRDETECT;
1331 writel(dev->int_enable, &dev->regs->int_enable);
1335 /*-------------------------------------------------------------------------*/
1337 /* keeping it simple:
1338 * - one bus driver, initted first;
1339 * - one function driver, initted second
1342 static struct goku_udc *the_controller;
1344 /* when a driver is successfully registered, it will receive
1345 * control requests including set_configuration(), which enables
1346 * non-control requests. then usb traffic follows until a
1347 * disconnect is reported. then a host may connect again, or
1348 * the driver might get unbound.
1350 static int goku_start(struct usb_gadget_driver *driver,
1351 int (*bind)(struct usb_gadget *, struct usb_gadget_driver *))
1353 struct goku_udc *dev = the_controller;
1357 || driver->max_speed < USB_SPEED_FULL
1359 || !driver->disconnect
1367 /* hook up the driver */
1368 driver->driver.bus = NULL;
1369 dev->driver = driver;
1370 dev->gadget.dev.driver = &driver->driver;
1371 retval = bind(&dev->gadget, driver);
1373 DBG(dev, "bind to driver %s --> error %d\n",
1374 driver->driver.name, retval);
1376 dev->gadget.dev.driver = NULL;
1380 /* then enable host detection and ep0; and we're ready
1381 * for set_configuration as well as eventual disconnect.
1385 DBG(dev, "registered gadget driver '%s'\n", driver->driver.name);
1390 stop_activity(struct goku_udc *dev, struct usb_gadget_driver *driver)
1394 DBG (dev, "%s\n", __func__);
1396 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1399 /* disconnect gadget driver after quiesceing hw and the driver */
1401 for (i = 0; i < 4; i++)
1402 nuke(&dev->ep [i], -ESHUTDOWN);
1404 spin_unlock(&dev->lock);
1405 driver->disconnect(&dev->gadget);
1406 spin_lock(&dev->lock);
1413 static int goku_stop(struct usb_gadget_driver *driver)
1415 struct goku_udc *dev = the_controller;
1416 unsigned long flags;
1420 if (!driver || driver != dev->driver || !driver->unbind)
1423 spin_lock_irqsave(&dev->lock, flags);
1425 stop_activity(dev, driver);
1426 spin_unlock_irqrestore(&dev->lock, flags);
1428 driver->unbind(&dev->gadget);
1429 dev->gadget.dev.driver = NULL;
1431 DBG(dev, "unregistered driver '%s'\n", driver->driver.name);
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 */
1476 (!dev->ep[tmp].ep.desc && tmp != 0))
1478 if (ctrl.wIndex & cpu_to_le16(
1480 if (!dev->ep[tmp].is_in)
1483 if (dev->ep[tmp].is_in)
1486 if (ctrl.wValue != cpu_to_le16(
1490 goku_clear_halt(&dev->ep[tmp]);
1492 /* start ep0out status stage */
1493 writel(~(1<<0), ®s->EOP);
1494 dev->ep[0].stopped = 1;
1495 dev->ep0state = EP0_STATUS;
1497 case USB_RECIP_DEVICE:
1498 /* device remote wakeup: always clear */
1499 if (ctrl.wValue != cpu_to_le16(1))
1501 VDBG(dev, "clear dev remote wakeup\n");
1503 case USB_RECIP_INTERFACE:
1505 default: /* pass to gadget driver */
1515 VDBG(dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
1516 ctrl.bRequestType, ctrl.bRequest,
1517 le16_to_cpu(ctrl.wValue), le16_to_cpu(ctrl.wIndex),
1518 le16_to_cpu(ctrl.wLength));
1521 /* hw wants to know when we're configured (or not) */
1522 dev->req_config = (ctrl.bRequest == USB_REQ_SET_CONFIGURATION
1523 && ctrl.bRequestType == USB_RECIP_DEVICE);
1524 if (unlikely(dev->req_config))
1525 dev->configured = (ctrl.wValue != cpu_to_le16(0));
1527 /* delegate everything to the gadget driver.
1528 * it may respond after this irq handler returns.
1530 spin_unlock (&dev->lock);
1531 tmp = dev->driver->setup(&dev->gadget, &ctrl);
1532 spin_lock (&dev->lock);
1533 if (unlikely(tmp < 0)) {
1536 VDBG(dev, "req %02x.%02x protocol STALL; err %d\n",
1537 ctrl.bRequestType, ctrl.bRequest, tmp);
1539 command(regs, COMMAND_STALL, 0);
1540 dev->ep[0].stopped = 1;
1541 dev->ep0state = EP0_STALL;
1544 /* expect at least one data or status stage irq */
1547 #define ACK(irqbit) { \
1549 writel(~irqbit, ®s->int_status); \
1553 static irqreturn_t goku_irq(int irq, void *_dev)
1555 struct goku_udc *dev = _dev;
1556 struct goku_udc_regs __iomem *regs = dev->regs;
1558 u32 stat, handled = 0;
1559 unsigned i, rescans = 5;
1561 spin_lock(&dev->lock);
1564 stat = readl(®s->int_status) & dev->int_enable;
1569 /* device-wide irqs */
1570 if (unlikely(stat & INT_DEVWIDE)) {
1571 if (stat & INT_SYSERROR) {
1572 ERROR(dev, "system error\n");
1573 stop_activity(dev, dev->driver);
1576 // FIXME have a neater way to prevent re-enumeration
1580 if (stat & INT_PWRDETECT) {
1581 writel(~stat, ®s->int_status);
1582 if (readl(&dev->regs->power_detect) & PW_DETECT) {
1583 VDBG(dev, "connect\n");
1586 DBG(dev, "disconnect\n");
1587 if (dev->gadget.speed == USB_SPEED_FULL)
1588 stop_activity(dev, dev->driver);
1589 dev->ep0state = EP0_DISCONNECT;
1590 dev->int_enable = INT_DEVWIDE;
1591 writel(dev->int_enable, &dev->regs->int_enable);
1597 if (stat & INT_SUSPEND) {
1599 if (readl(®s->ep_status[0]) & EPxSTATUS_SUSPEND) {
1600 switch (dev->ep0state) {
1601 case EP0_DISCONNECT:
1607 DBG(dev, "USB suspend\n");
1608 dev->ep0state = EP0_SUSPEND;
1609 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1611 && dev->driver->suspend) {
1612 spin_unlock(&dev->lock);
1613 dev->driver->suspend(&dev->gadget);
1614 spin_lock(&dev->lock);
1617 if (dev->ep0state != EP0_SUSPEND) {
1618 DBG(dev, "bogus USB resume %d\n",
1622 DBG(dev, "USB resume\n");
1623 dev->ep0state = EP0_IDLE;
1624 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1626 && dev->driver->resume) {
1627 spin_unlock(&dev->lock);
1628 dev->driver->resume(&dev->gadget);
1629 spin_lock(&dev->lock);
1634 if (stat & INT_USBRESET) { /* hub reset done */
1636 INFO(dev, "USB reset done, gadget %s\n",
1637 dev->driver->driver.name);
1639 // and INT_ERR on some endpoint's crc/bitstuff/... problem
1642 /* progress ep0 setup, data, or status stages.
1643 * no transition {EP0_STATUS, EP0_STALL} --> EP0_IDLE; saves irqs
1645 if (stat & INT_SETUP) {
1650 if (stat & INT_STATUSNAK) {
1651 ACK(INT_STATUSNAK|INT_ENDPOINT0);
1652 if (dev->ep0state == EP0_IN) {
1656 writel(~(1<<0), ®s->EOP);
1657 dev->ep0state = EP0_STATUS;
1660 if (stat & INT_ENDPOINT0) {
1667 /* dma completion */
1668 if (stat & INT_MSTRDEND) { /* IN */
1670 ep = &dev->ep[UDC_MSTRD_ENDPOINT];
1672 dma_advance(dev, ep);
1674 if (stat & INT_MSTWREND) { /* OUT */
1676 ep = &dev->ep[UDC_MSTWR_ENDPOINT];
1678 dma_advance(dev, ep);
1680 if (stat & INT_MSTWRTMOUT) { /* OUT */
1681 ACK(INT_MSTWRTMOUT);
1682 ep = &dev->ep[UDC_MSTWR_ENDPOINT];
1684 ERROR(dev, "%s write timeout ?\n", ep->ep.name);
1685 // reset dma? then dma_advance()
1689 for (i = 1; i < 4; i++) {
1690 u32 tmp = INT_EPxDATASET(i);
1696 if (list_empty (&ep->queue))
1697 pio_irq_disable(dev, regs, i);
1707 (void)readl(®s->int_enable);
1708 spin_unlock(&dev->lock);
1710 DBG(dev, "unhandled irq status: %05x (%05x, %05x)\n", stat,
1711 readl(®s->int_status), dev->int_enable);
1712 return IRQ_RETVAL(handled);
1717 /*-------------------------------------------------------------------------*/
1719 static void gadget_release(struct device *_dev)
1721 struct goku_udc *dev = dev_get_drvdata(_dev);
1726 /* tear down the binding between this driver and the pci device */
1728 static void goku_remove(struct pci_dev *pdev)
1730 struct goku_udc *dev = pci_get_drvdata(pdev);
1732 DBG(dev, "%s\n", __func__);
1734 usb_del_gadget_udc(&dev->gadget);
1736 BUG_ON(dev->driver);
1738 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1739 remove_proc_entry(proc_node_name, NULL);
1744 free_irq(pdev->irq, dev);
1747 if (dev->got_region)
1748 release_mem_region(pci_resource_start (pdev, 0),
1749 pci_resource_len (pdev, 0));
1751 pci_disable_device(pdev);
1752 if (dev->registered)
1753 device_unregister(&dev->gadget.dev);
1755 pci_set_drvdata(pdev, NULL);
1757 the_controller = NULL;
1759 INFO(dev, "unbind\n");
1762 /* wrap this driver around the specified pci device, but
1763 * don't respond over USB until a gadget driver binds to us.
1766 static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1768 struct goku_udc *dev = NULL;
1769 unsigned long resource, len;
1770 void __iomem *base = NULL;
1773 /* if you want to support more than one controller in a system,
1774 * usb_gadget_driver_{register,unregister}() must change.
1776 if (the_controller) {
1777 pr_warning("ignoring %s\n", pci_name(pdev));
1781 printk(KERN_ERR "Check PCI %s IRQ setup!\n", pci_name(pdev));
1786 /* alloc, and start init */
1787 dev = kzalloc (sizeof *dev, GFP_KERNEL);
1789 pr_debug("enomem %s\n", pci_name(pdev));
1794 spin_lock_init(&dev->lock);
1796 dev->gadget.ops = &goku_ops;
1797 dev->gadget.max_speed = USB_SPEED_FULL;
1799 /* the "gadget" abstracts/virtualizes the controller */
1800 dev_set_name(&dev->gadget.dev, "gadget");
1801 dev->gadget.dev.parent = &pdev->dev;
1802 dev->gadget.dev.dma_mask = pdev->dev.dma_mask;
1803 dev->gadget.dev.release = gadget_release;
1804 dev->gadget.name = driver_name;
1806 /* now all the pci goodies ... */
1807 retval = pci_enable_device(pdev);
1809 DBG(dev, "can't enable, %d\n", retval);
1814 resource = pci_resource_start(pdev, 0);
1815 len = pci_resource_len(pdev, 0);
1816 if (!request_mem_region(resource, len, driver_name)) {
1817 DBG(dev, "controller already in use\n");
1821 dev->got_region = 1;
1823 base = ioremap_nocache(resource, len);
1825 DBG(dev, "can't map memory\n");
1829 dev->regs = (struct goku_udc_regs __iomem *) base;
1831 pci_set_drvdata(pdev, dev);
1832 INFO(dev, "%s\n", driver_desc);
1833 INFO(dev, "version: " DRIVER_VERSION " %s\n", dmastr());
1834 INFO(dev, "irq %d, pci mem %p\n", pdev->irq, base);
1836 /* init to known state, then setup irqs */
1839 if (request_irq(pdev->irq, goku_irq, IRQF_SHARED,
1840 driver_name, dev) != 0) {
1841 DBG(dev, "request interrupt %d failed\n", pdev->irq);
1847 pci_set_master(pdev);
1850 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1851 create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev);
1854 the_controller = dev;
1855 retval = device_register(&dev->gadget.dev);
1857 put_device(&dev->gadget.dev);
1860 dev->registered = 1;
1861 retval = usb_add_gadget_udc(&pdev->dev, &dev->gadget);
1874 /*-------------------------------------------------------------------------*/
1876 static const struct pci_device_id pci_ids[] = { {
1877 .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
1879 .vendor = 0x102f, /* Toshiba */
1880 .device = 0x0107, /* this UDC */
1881 .subvendor = PCI_ANY_ID,
1882 .subdevice = PCI_ANY_ID,
1884 }, { /* end: all zeroes */ }
1886 MODULE_DEVICE_TABLE (pci, pci_ids);
1888 static struct pci_driver goku_pci_driver = {
1889 .name = (char *) driver_name,
1890 .id_table = pci_ids,
1892 .probe = goku_probe,
1893 .remove = goku_remove,
1895 /* FIXME add power management support */
1898 module_pci_driver(goku_pci_driver);