1 // SPDX-License-Identifier: GPL-2.0+
3 * Driver for PLX NET2272 USB device controller
5 * Copyright (C) 2005-2006 PLX Technology, Inc.
6 * Copyright (C) 2006-2011 Analog Devices, Inc.
9 #include <linux/delay.h>
10 #include <linux/device.h>
11 #include <linux/errno.h>
12 #include <linux/init.h>
13 #include <linux/interrupt.h>
15 #include <linux/ioport.h>
16 #include <linux/kernel.h>
17 #include <linux/list.h>
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/pci.h>
21 #include <linux/platform_device.h>
22 #include <linux/prefetch.h>
23 #include <linux/sched.h>
24 #include <linux/slab.h>
25 #include <linux/timer.h>
26 #include <linux/usb.h>
27 #include <linux/usb/ch9.h>
28 #include <linux/usb/gadget.h>
30 #include <asm/byteorder.h>
31 #include <asm/unaligned.h>
35 #define DRIVER_DESC "PLX NET2272 USB Peripheral Controller"
37 static const char driver_name[] = "net2272";
38 static const char driver_vers[] = "2006 October 17/mainline";
39 static const char driver_desc[] = DRIVER_DESC;
41 static const char ep0name[] = "ep0";
42 static const char * const ep_name[] = {
44 "ep-a", "ep-b", "ep-c",
47 #ifdef CONFIG_USB_NET2272_DMA
49 * use_dma: the NET2272 can use an external DMA controller.
50 * Note that since there is no generic DMA api, some functions,
51 * notably request_dma, start_dma, and cancel_dma will need to be
52 * modified for your platform's particular dma controller.
54 * If use_dma is disabled, pio will be used instead.
56 static bool use_dma = false;
57 module_param(use_dma, bool, 0644);
60 * dma_ep: selects the endpoint for use with dma (1=ep-a, 2=ep-b)
61 * The NET2272 can only use dma for a single endpoint at a time.
62 * At some point this could be modified to allow either endpoint
63 * to take control of dma as it becomes available.
65 * Note that DMA should not be used on OUT endpoints unless it can
66 * be guaranteed that no short packets will arrive on an IN endpoint
67 * while the DMA operation is pending. Otherwise the OUT DMA will
68 * terminate prematurely (See NET2272 Errata 630-0213-0101)
70 static ushort dma_ep = 1;
71 module_param(dma_ep, ushort, 0644);
74 * dma_mode: net2272 dma mode setting (see LOCCTL1 definition):
75 * mode 0 == Slow DREQ mode
76 * mode 1 == Fast DREQ mode
77 * mode 2 == Burst mode
79 static ushort dma_mode = 2;
80 module_param(dma_mode, ushort, 0644);
88 * fifo_mode: net2272 buffer configuration:
89 * mode 0 == ep-{a,b,c} 512db each
90 * mode 1 == ep-a 1k, ep-{b,c} 512db
91 * mode 2 == ep-a 1k, ep-b 1k, ep-c 512db
92 * mode 3 == ep-a 1k, ep-b disabled, ep-c 512db
94 static ushort fifo_mode;
95 module_param(fifo_mode, ushort, 0644);
98 * enable_suspend: When enabled, the driver will respond to
99 * USB suspend requests by powering down the NET2272. Otherwise,
100 * USB suspend requests will be ignored. This is acceptable for
101 * self-powered devices. For bus powered devices set this to 1.
103 static ushort enable_suspend;
104 module_param(enable_suspend, ushort, 0644);
106 static void assert_out_naking(struct net2272_ep *ep, const char *where)
114 tmp = net2272_ep_read(ep, EP_STAT0);
115 if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) {
116 dev_dbg(ep->dev->dev, "%s %s %02x !NAK\n",
117 ep->ep.name, where, tmp);
118 net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS);
121 #define ASSERT_OUT_NAKING(ep) assert_out_naking(ep, __func__)
123 static void stop_out_naking(struct net2272_ep *ep)
125 u8 tmp = net2272_ep_read(ep, EP_STAT0);
127 if ((tmp & (1 << NAK_OUT_PACKETS)) != 0)
128 net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS);
131 #define PIPEDIR(bAddress) (usb_pipein(bAddress) ? "in" : "out")
133 static char *type_string(u8 bmAttributes)
135 switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) {
136 case USB_ENDPOINT_XFER_BULK: return "bulk";
137 case USB_ENDPOINT_XFER_ISOC: return "iso";
138 case USB_ENDPOINT_XFER_INT: return "intr";
139 default: return "control";
143 static char *buf_state_string(unsigned state)
146 case BUFF_FREE: return "free";
147 case BUFF_VALID: return "valid";
148 case BUFF_LCL: return "local";
149 case BUFF_USB: return "usb";
150 default: return "unknown";
154 static char *dma_mode_string(void)
159 case 0: return "SLOW DREQ";
160 case 1: return "FAST DREQ";
161 case 2: return "BURST";
162 default: return "invalid";
166 static void net2272_dequeue_all(struct net2272_ep *);
167 static int net2272_kick_dma(struct net2272_ep *, struct net2272_request *);
168 static int net2272_fifo_status(struct usb_ep *);
170 static const struct usb_ep_ops net2272_ep_ops;
172 /*---------------------------------------------------------------------------*/
175 net2272_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
178 struct net2272_ep *ep;
183 ep = container_of(_ep, struct net2272_ep, ep);
184 if (!_ep || !desc || ep->desc || _ep->name == ep0name
185 || desc->bDescriptorType != USB_DT_ENDPOINT)
188 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
191 max = usb_endpoint_maxp(desc);
193 spin_lock_irqsave(&dev->lock, flags);
194 _ep->maxpacket = max;
197 /* net2272_ep_reset() has already been called */
201 /* set speed-dependent max packet */
202 net2272_ep_write(ep, EP_MAXPKT0, max & 0xff);
203 net2272_ep_write(ep, EP_MAXPKT1, (max & 0xff00) >> 8);
205 /* set type, direction, address; reset fifo counters */
206 net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
207 tmp = usb_endpoint_type(desc);
208 if (usb_endpoint_xfer_bulk(desc)) {
209 /* catch some particularly blatant driver bugs */
210 if ((dev->gadget.speed == USB_SPEED_HIGH && max != 512) ||
211 (dev->gadget.speed == USB_SPEED_FULL && max > 64)) {
212 spin_unlock_irqrestore(&dev->lock, flags);
216 ep->is_iso = usb_endpoint_xfer_isoc(desc) ? 1 : 0;
217 tmp <<= ENDPOINT_TYPE;
218 tmp |= ((desc->bEndpointAddress & 0x0f) << ENDPOINT_NUMBER);
219 tmp |= usb_endpoint_dir_in(desc) << ENDPOINT_DIRECTION;
220 tmp |= (1 << ENDPOINT_ENABLE);
222 /* for OUT transfers, block the rx fifo until a read is posted */
223 ep->is_in = usb_endpoint_dir_in(desc);
225 net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS);
227 net2272_ep_write(ep, EP_CFG, tmp);
230 tmp = (1 << ep->num) | net2272_read(dev, IRQENB0);
231 net2272_write(dev, IRQENB0, tmp);
233 tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
234 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
235 | net2272_ep_read(ep, EP_IRQENB);
236 net2272_ep_write(ep, EP_IRQENB, tmp);
238 tmp = desc->bEndpointAddress;
239 dev_dbg(dev->dev, "enabled %s (ep%d%s-%s) max %04x cfg %02x\n",
240 _ep->name, tmp & 0x0f, PIPEDIR(tmp),
241 type_string(desc->bmAttributes), max,
242 net2272_ep_read(ep, EP_CFG));
244 spin_unlock_irqrestore(&dev->lock, flags);
248 static void net2272_ep_reset(struct net2272_ep *ep)
253 INIT_LIST_HEAD(&ep->queue);
255 usb_ep_set_maxpacket_limit(&ep->ep, ~0);
256 ep->ep.ops = &net2272_ep_ops;
258 /* disable irqs, endpoint */
259 net2272_ep_write(ep, EP_IRQENB, 0);
261 /* init to our chosen defaults, notably so that we NAK OUT
262 * packets until the driver queues a read.
264 tmp = (1 << NAK_OUT_PACKETS_MODE) | (1 << ALT_NAK_OUT_PACKETS);
265 net2272_ep_write(ep, EP_RSPSET, tmp);
267 tmp = (1 << INTERRUPT_MODE) | (1 << HIDE_STATUS_PHASE);
269 tmp |= (1 << ENDPOINT_TOGGLE) | (1 << ENDPOINT_HALT);
271 net2272_ep_write(ep, EP_RSPCLR, tmp);
273 /* scrub most status bits, and flush any fifo state */
274 net2272_ep_write(ep, EP_STAT0,
275 (1 << DATA_IN_TOKEN_INTERRUPT)
276 | (1 << DATA_OUT_TOKEN_INTERRUPT)
277 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
278 | (1 << DATA_PACKET_RECEIVED_INTERRUPT)
279 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT));
281 net2272_ep_write(ep, EP_STAT1,
283 | (1 << USB_OUT_ACK_SENT)
284 | (1 << USB_OUT_NAK_SENT)
285 | (1 << USB_IN_ACK_RCVD)
286 | (1 << USB_IN_NAK_SENT)
287 | (1 << USB_STALL_SENT)
288 | (1 << LOCAL_OUT_ZLP)
289 | (1 << BUFFER_FLUSH));
291 /* fifo size is handled separately */
294 static int net2272_disable(struct usb_ep *_ep)
296 struct net2272_ep *ep;
299 ep = container_of(_ep, struct net2272_ep, ep);
300 if (!_ep || !ep->desc || _ep->name == ep0name)
303 spin_lock_irqsave(&ep->dev->lock, flags);
304 net2272_dequeue_all(ep);
305 net2272_ep_reset(ep);
307 dev_vdbg(ep->dev->dev, "disabled %s\n", _ep->name);
309 spin_unlock_irqrestore(&ep->dev->lock, flags);
313 /*---------------------------------------------------------------------------*/
315 static struct usb_request *
316 net2272_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
318 struct net2272_request *req;
323 req = kzalloc(sizeof(*req), gfp_flags);
327 INIT_LIST_HEAD(&req->queue);
333 net2272_free_request(struct usb_ep *_ep, struct usb_request *_req)
335 struct net2272_request *req;
340 req = container_of(_req, struct net2272_request, req);
341 WARN_ON(!list_empty(&req->queue));
346 net2272_done(struct net2272_ep *ep, struct net2272_request *req, int status)
349 unsigned stopped = ep->stopped;
352 if (ep->dev->protocol_stall) {
359 list_del_init(&req->queue);
361 if (req->req.status == -EINPROGRESS)
362 req->req.status = status;
364 status = req->req.status;
367 if (use_dma && ep->dma)
368 usb_gadget_unmap_request(&dev->gadget, &req->req,
371 if (status && status != -ESHUTDOWN)
372 dev_vdbg(dev->dev, "complete %s req %p stat %d len %u/%u buf %p\n",
373 ep->ep.name, &req->req, status,
374 req->req.actual, req->req.length, req->req.buf);
376 /* don't modify queue heads during completion callback */
378 spin_unlock(&dev->lock);
379 usb_gadget_giveback_request(&ep->ep, &req->req);
380 spin_lock(&dev->lock);
381 ep->stopped = stopped;
385 net2272_write_packet(struct net2272_ep *ep, u8 *buf,
386 struct net2272_request *req, unsigned max)
388 u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA);
390 unsigned length, count;
393 length = min(req->req.length - req->req.actual, max);
394 req->req.actual += length;
396 dev_vdbg(ep->dev->dev, "write packet %s req %p max %u len %u avail %u\n",
397 ep->ep.name, req, max, length,
398 (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0));
403 while (likely(count >= 2)) {
404 /* no byte-swap required; chip endian set during init */
405 writew(*bufp++, ep_data);
410 /* write final byte by placing the NET2272 into 8-bit mode */
411 if (unlikely(count)) {
412 tmp = net2272_read(ep->dev, LOCCTL);
413 net2272_write(ep->dev, LOCCTL, tmp & ~(1 << DATA_WIDTH));
414 writeb(*buf, ep_data);
415 net2272_write(ep->dev, LOCCTL, tmp);
420 /* returns: 0: still running, 1: completed, negative: errno */
422 net2272_write_fifo(struct net2272_ep *ep, struct net2272_request *req)
428 dev_vdbg(ep->dev->dev, "write_fifo %s actual %d len %d\n",
429 ep->ep.name, req->req.actual, req->req.length);
432 * Keep loading the endpoint until the final packet is loaded,
433 * or the endpoint buffer is full.
437 * Clear interrupt status
438 * - Packet Transmitted interrupt will become set again when the
439 * host successfully takes another packet
441 net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT));
442 while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_FULL))) {
443 buf = req->req.buf + req->req.actual;
447 net2272_ep_read(ep, EP_STAT0);
449 max = (net2272_ep_read(ep, EP_AVAIL1) << 8) |
450 (net2272_ep_read(ep, EP_AVAIL0));
452 if (max < ep->ep.maxpacket)
453 max = (net2272_ep_read(ep, EP_AVAIL1) << 8)
454 | (net2272_ep_read(ep, EP_AVAIL0));
456 count = net2272_write_packet(ep, buf, req, max);
457 /* see if we are done */
458 if (req->req.length == req->req.actual) {
459 /* validate short or zlp packet */
460 if (count < ep->ep.maxpacket)
461 set_fifo_bytecount(ep, 0);
462 net2272_done(ep, req, 0);
464 if (!list_empty(&ep->queue)) {
465 req = list_entry(ep->queue.next,
466 struct net2272_request,
468 status = net2272_kick_dma(ep, req);
471 if ((net2272_ep_read(ep, EP_STAT0)
472 & (1 << BUFFER_EMPTY)))
477 net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT));
483 net2272_out_flush(struct net2272_ep *ep)
485 ASSERT_OUT_NAKING(ep);
487 net2272_ep_write(ep, EP_STAT0, (1 << DATA_OUT_TOKEN_INTERRUPT)
488 | (1 << DATA_PACKET_RECEIVED_INTERRUPT));
489 net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
493 net2272_read_packet(struct net2272_ep *ep, u8 *buf,
494 struct net2272_request *req, unsigned avail)
496 u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA);
500 req->req.actual += avail;
502 dev_vdbg(ep->dev->dev, "read packet %s req %p len %u avail %u\n",
503 ep->ep.name, req, avail,
504 (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0));
506 is_short = (avail < ep->ep.maxpacket);
508 if (unlikely(avail == 0)) {
509 /* remove any zlp from the buffer */
510 (void)readw(ep_data);
514 /* Ensure we get the final byte */
515 if (unlikely(avail % 2))
520 *bufp++ = readw(ep_data);
525 * To avoid false endpoint available race condition must read
526 * ep stat0 twice in the case of a short transfer
528 if (net2272_ep_read(ep, EP_STAT0) & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT))
529 net2272_ep_read(ep, EP_STAT0);
535 net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req)
543 dev_vdbg(ep->dev->dev, "read_fifo %s actual %d len %d\n",
544 ep->ep.name, req->req.actual, req->req.length);
548 buf = req->req.buf + req->req.actual;
551 count = (net2272_ep_read(ep, EP_AVAIL1) << 8)
552 | net2272_ep_read(ep, EP_AVAIL0);
554 net2272_ep_write(ep, EP_STAT0,
555 (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) |
556 (1 << DATA_PACKET_RECEIVED_INTERRUPT));
558 tmp = req->req.length - req->req.actual;
561 if ((tmp % ep->ep.maxpacket) != 0) {
562 dev_err(ep->dev->dev,
563 "%s out fifo %d bytes, expected %d\n",
564 ep->ep.name, count, tmp);
567 count = (tmp > 0) ? tmp : 0;
570 is_short = net2272_read_packet(ep, buf, req, count);
573 if (unlikely(cleanup || is_short ||
574 req->req.actual == req->req.length)) {
577 net2272_out_flush(ep);
578 net2272_done(ep, req, -EOVERFLOW);
580 net2272_done(ep, req, 0);
582 /* re-initialize endpoint transfer registers
583 * otherwise they may result in erroneous pre-validation
584 * for subsequent control reads
586 if (unlikely(ep->num == 0)) {
587 net2272_ep_write(ep, EP_TRANSFER2, 0);
588 net2272_ep_write(ep, EP_TRANSFER1, 0);
589 net2272_ep_write(ep, EP_TRANSFER0, 0);
592 if (!list_empty(&ep->queue)) {
595 req = list_entry(ep->queue.next,
596 struct net2272_request, queue);
597 status = net2272_kick_dma(ep, req);
599 !(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY)))
604 } while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY)));
610 net2272_pio_advance(struct net2272_ep *ep)
612 struct net2272_request *req;
614 if (unlikely(list_empty(&ep->queue)))
617 req = list_entry(ep->queue.next, struct net2272_request, queue);
618 (ep->is_in ? net2272_write_fifo : net2272_read_fifo)(ep, req);
621 /* returns 0 on success, else negative errno */
623 net2272_request_dma(struct net2272 *dev, unsigned ep, u32 buf,
624 unsigned len, unsigned dir)
626 dev_vdbg(dev->dev, "request_dma ep %d buf %08x len %d dir %d\n",
629 /* The NET2272 only supports a single dma channel */
633 * EP_TRANSFER (used to determine the number of bytes received
634 * in an OUT transfer) is 24 bits wide; don't ask for more than that.
636 if ((dir == 1) && (len > 0x1000000))
641 /* initialize platform's dma */
642 #ifdef CONFIG_USB_PCI
643 /* NET2272 addr, buffer addr, length, etc. */
644 switch (dev->dev_id) {
645 case PCI_DEVICE_ID_RDK1:
646 /* Setup PLX 9054 DMA mode */
647 writel((1 << LOCAL_BUS_WIDTH) |
648 (1 << TA_READY_INPUT_ENABLE) |
649 (0 << LOCAL_BURST_ENABLE) |
650 (1 << DONE_INTERRUPT_ENABLE) |
651 (1 << LOCAL_ADDRESSING_MODE) |
653 (1 << DMA_EOT_ENABLE) |
654 (1 << FAST_SLOW_TERMINATE_MODE_SELECT) |
655 (1 << DMA_CHANNEL_INTERRUPT_SELECT),
656 dev->rdk1.plx9054_base_addr + DMAMODE0);
658 writel(0x100000, dev->rdk1.plx9054_base_addr + DMALADR0);
659 writel(buf, dev->rdk1.plx9054_base_addr + DMAPADR0);
660 writel(len, dev->rdk1.plx9054_base_addr + DMASIZ0);
661 writel((dir << DIRECTION_OF_TRANSFER) |
662 (1 << INTERRUPT_AFTER_TERMINAL_COUNT),
663 dev->rdk1.plx9054_base_addr + DMADPR0);
664 writel((1 << LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE) |
665 readl(dev->rdk1.plx9054_base_addr + INTCSR),
666 dev->rdk1.plx9054_base_addr + INTCSR);
672 net2272_write(dev, DMAREQ,
673 (0 << DMA_BUFFER_VALID) |
674 (1 << DMA_REQUEST_ENABLE) |
675 (1 << DMA_CONTROL_DACK) |
676 (dev->dma_eot_polarity << EOT_POLARITY) |
677 (dev->dma_dack_polarity << DACK_POLARITY) |
678 (dev->dma_dreq_polarity << DREQ_POLARITY) |
679 ((ep >> 1) << DMA_ENDPOINT_SELECT));
681 (void) net2272_read(dev, SCRATCH);
687 net2272_start_dma(struct net2272 *dev)
689 /* start platform's dma controller */
690 #ifdef CONFIG_USB_PCI
691 switch (dev->dev_id) {
692 case PCI_DEVICE_ID_RDK1:
693 writeb((1 << CHANNEL_ENABLE) | (1 << CHANNEL_START),
694 dev->rdk1.plx9054_base_addr + DMACSR0);
700 /* returns 0 on success, else negative errno */
702 net2272_kick_dma(struct net2272_ep *ep, struct net2272_request *req)
707 if (!use_dma || (ep->num < 1) || (ep->num > 2) || !ep->dma)
710 /* don't use dma for odd-length transfers
711 * otherwise, we'd need to deal with the last byte with pio
713 if (req->req.length & 1)
716 dev_vdbg(ep->dev->dev, "kick_dma %s req %p dma %08llx\n",
717 ep->ep.name, req, (unsigned long long) req->req.dma);
719 net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS);
721 /* The NET2272 can only use DMA on one endpoint at a time */
722 if (ep->dev->dma_busy)
725 /* Make sure we only DMA an even number of bytes (we'll use
726 * pio to complete the transfer)
728 size = req->req.length;
731 /* device-to-host transfer */
733 /* initialize platform's dma controller */
734 if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 0))
735 /* unable to obtain DMA channel; return error and use pio mode */
737 req->req.actual += size;
739 /* host-to-device transfer */
741 tmp = net2272_ep_read(ep, EP_STAT0);
743 /* initialize platform's dma controller */
744 if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 1))
745 /* unable to obtain DMA channel; return error and use pio mode */
748 if (!(tmp & (1 << BUFFER_EMPTY)))
754 /* allow the endpoint's buffer to fill */
755 net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS);
757 /* this transfer completed and data's already in the fifo
758 * return error so pio gets used.
760 if (tmp & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) {
763 net2272_write(ep->dev, DMAREQ,
764 (0 << DMA_BUFFER_VALID) |
765 (0 << DMA_REQUEST_ENABLE) |
766 (1 << DMA_CONTROL_DACK) |
767 (ep->dev->dma_eot_polarity << EOT_POLARITY) |
768 (ep->dev->dma_dack_polarity << DACK_POLARITY) |
769 (ep->dev->dma_dreq_polarity << DREQ_POLARITY) |
770 ((ep->num >> 1) << DMA_ENDPOINT_SELECT));
776 /* Don't use per-packet interrupts: use dma interrupts only */
777 net2272_ep_write(ep, EP_IRQENB, 0);
779 net2272_start_dma(ep->dev);
784 static void net2272_cancel_dma(struct net2272 *dev)
786 #ifdef CONFIG_USB_PCI
787 switch (dev->dev_id) {
788 case PCI_DEVICE_ID_RDK1:
789 writeb(0, dev->rdk1.plx9054_base_addr + DMACSR0);
790 writeb(1 << CHANNEL_ABORT, dev->rdk1.plx9054_base_addr + DMACSR0);
791 while (!(readb(dev->rdk1.plx9054_base_addr + DMACSR0) &
792 (1 << CHANNEL_DONE)))
793 continue; /* wait for dma to stabalize */
795 /* dma abort generates an interrupt */
796 writeb(1 << CHANNEL_CLEAR_INTERRUPT,
797 dev->rdk1.plx9054_base_addr + DMACSR0);
805 /*---------------------------------------------------------------------------*/
808 net2272_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
810 struct net2272_request *req;
811 struct net2272_ep *ep;
817 req = container_of(_req, struct net2272_request, req);
818 if (!_req || !_req->complete || !_req->buf
819 || !list_empty(&req->queue))
821 ep = container_of(_ep, struct net2272_ep, ep);
822 if (!_ep || (!ep->desc && ep->num != 0))
825 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
828 /* set up dma mapping in case the caller didn't */
829 if (use_dma && ep->dma) {
830 status = usb_gadget_map_request(&dev->gadget, _req,
836 dev_vdbg(dev->dev, "%s queue req %p, len %d buf %p dma %08llx %s\n",
837 _ep->name, _req, _req->length, _req->buf,
838 (unsigned long long) _req->dma, _req->zero ? "zero" : "!zero");
840 spin_lock_irqsave(&dev->lock, flags);
842 _req->status = -EINPROGRESS;
845 /* kickstart this i/o queue? */
846 if (list_empty(&ep->queue) && !ep->stopped) {
847 /* maybe there's no control data, just status ack */
848 if (ep->num == 0 && _req->length == 0) {
849 net2272_done(ep, req, 0);
850 dev_vdbg(dev->dev, "%s status ack\n", ep->ep.name);
854 /* Return zlp, don't let it block subsequent packets */
855 s = net2272_ep_read(ep, EP_STAT0);
856 if (s & (1 << BUFFER_EMPTY)) {
857 /* Buffer is empty check for a blocking zlp, handle it */
858 if ((s & (1 << NAK_OUT_PACKETS)) &&
859 net2272_ep_read(ep, EP_STAT1) & (1 << LOCAL_OUT_ZLP)) {
860 dev_dbg(dev->dev, "WARNING: returning ZLP short packet termination!\n");
862 * Request is going to terminate with a short packet ...
863 * hope the client is ready for it!
865 status = net2272_read_fifo(ep, req);
866 /* clear short packet naking */
867 net2272_ep_write(ep, EP_STAT0, (1 << NAK_OUT_PACKETS));
873 status = net2272_kick_dma(ep, req);
876 /* dma failed (most likely in use by another endpoint)
882 status = net2272_write_fifo(ep, req);
884 s = net2272_ep_read(ep, EP_STAT0);
885 if ((s & (1 << BUFFER_EMPTY)) == 0)
886 status = net2272_read_fifo(ep, req);
889 if (unlikely(status != 0)) {
897 list_add_tail(&req->queue, &ep->queue);
899 if (likely(!list_empty(&ep->queue)))
900 net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS);
902 spin_unlock_irqrestore(&dev->lock, flags);
907 /* dequeue ALL requests */
909 net2272_dequeue_all(struct net2272_ep *ep)
911 struct net2272_request *req;
913 /* called with spinlock held */
916 while (!list_empty(&ep->queue)) {
917 req = list_entry(ep->queue.next,
918 struct net2272_request,
920 net2272_done(ep, req, -ESHUTDOWN);
924 /* dequeue JUST ONE request */
926 net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req)
928 struct net2272_ep *ep;
929 struct net2272_request *req = NULL, *iter;
933 ep = container_of(_ep, struct net2272_ep, ep);
934 if (!_ep || (!ep->desc && ep->num != 0) || !_req)
937 spin_lock_irqsave(&ep->dev->lock, flags);
938 stopped = ep->stopped;
941 /* make sure it's still queued on this endpoint */
942 list_for_each_entry(iter, &ep->queue, queue) {
943 if (&iter->req != _req)
949 ep->stopped = stopped;
950 spin_unlock_irqrestore(&ep->dev->lock, flags);
954 /* queue head may be partially complete */
955 if (ep->queue.next == &req->queue) {
956 dev_dbg(ep->dev->dev, "unlink (%s) pio\n", _ep->name);
957 net2272_done(ep, req, -ECONNRESET);
959 ep->stopped = stopped;
961 spin_unlock_irqrestore(&ep->dev->lock, flags);
965 /*---------------------------------------------------------------------------*/
968 net2272_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
970 struct net2272_ep *ep;
974 ep = container_of(_ep, struct net2272_ep, ep);
975 if (!_ep || (!ep->desc && ep->num != 0))
977 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
979 if (ep->desc /* not ep0 */ && usb_endpoint_xfer_isoc(ep->desc))
982 spin_lock_irqsave(&ep->dev->lock, flags);
983 if (!list_empty(&ep->queue))
985 else if (ep->is_in && value && net2272_fifo_status(_ep) != 0)
988 dev_vdbg(ep->dev->dev, "%s %s %s\n", _ep->name,
989 value ? "set" : "clear",
990 wedged ? "wedge" : "halt");
994 ep->dev->protocol_stall = 1;
1004 spin_unlock_irqrestore(&ep->dev->lock, flags);
1010 net2272_set_halt(struct usb_ep *_ep, int value)
1012 return net2272_set_halt_and_wedge(_ep, value, 0);
1016 net2272_set_wedge(struct usb_ep *_ep)
1018 if (!_ep || _ep->name == ep0name)
1020 return net2272_set_halt_and_wedge(_ep, 1, 1);
1024 net2272_fifo_status(struct usb_ep *_ep)
1026 struct net2272_ep *ep;
1029 ep = container_of(_ep, struct net2272_ep, ep);
1030 if (!_ep || (!ep->desc && ep->num != 0))
1032 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
1035 avail = net2272_ep_read(ep, EP_AVAIL1) << 8;
1036 avail |= net2272_ep_read(ep, EP_AVAIL0);
1037 if (avail > ep->fifo_size)
1040 avail = ep->fifo_size - avail;
1045 net2272_fifo_flush(struct usb_ep *_ep)
1047 struct net2272_ep *ep;
1049 ep = container_of(_ep, struct net2272_ep, ep);
1050 if (!_ep || (!ep->desc && ep->num != 0))
1052 if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
1055 net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
1058 static const struct usb_ep_ops net2272_ep_ops = {
1059 .enable = net2272_enable,
1060 .disable = net2272_disable,
1062 .alloc_request = net2272_alloc_request,
1063 .free_request = net2272_free_request,
1065 .queue = net2272_queue,
1066 .dequeue = net2272_dequeue,
1068 .set_halt = net2272_set_halt,
1069 .set_wedge = net2272_set_wedge,
1070 .fifo_status = net2272_fifo_status,
1071 .fifo_flush = net2272_fifo_flush,
1074 /*---------------------------------------------------------------------------*/
1077 net2272_get_frame(struct usb_gadget *_gadget)
1079 struct net2272 *dev;
1080 unsigned long flags;
1085 dev = container_of(_gadget, struct net2272, gadget);
1086 spin_lock_irqsave(&dev->lock, flags);
1088 ret = net2272_read(dev, FRAME1) << 8;
1089 ret |= net2272_read(dev, FRAME0);
1091 spin_unlock_irqrestore(&dev->lock, flags);
1096 net2272_wakeup(struct usb_gadget *_gadget)
1098 struct net2272 *dev;
1100 unsigned long flags;
1104 dev = container_of(_gadget, struct net2272, gadget);
1106 spin_lock_irqsave(&dev->lock, flags);
1107 tmp = net2272_read(dev, USBCTL0);
1108 if (tmp & (1 << IO_WAKEUP_ENABLE))
1109 net2272_write(dev, USBCTL1, (1 << GENERATE_RESUME));
1111 spin_unlock_irqrestore(&dev->lock, flags);
1117 net2272_set_selfpowered(struct usb_gadget *_gadget, int value)
1122 _gadget->is_selfpowered = (value != 0);
1128 net2272_pullup(struct usb_gadget *_gadget, int is_on)
1130 struct net2272 *dev;
1132 unsigned long flags;
1136 dev = container_of(_gadget, struct net2272, gadget);
1138 spin_lock_irqsave(&dev->lock, flags);
1139 tmp = net2272_read(dev, USBCTL0);
1140 dev->softconnect = (is_on != 0);
1142 tmp |= (1 << USB_DETECT_ENABLE);
1144 tmp &= ~(1 << USB_DETECT_ENABLE);
1145 net2272_write(dev, USBCTL0, tmp);
1146 spin_unlock_irqrestore(&dev->lock, flags);
1151 static int net2272_start(struct usb_gadget *_gadget,
1152 struct usb_gadget_driver *driver);
1153 static int net2272_stop(struct usb_gadget *_gadget);
1154 static void net2272_async_callbacks(struct usb_gadget *_gadget, bool enable);
1156 static const struct usb_gadget_ops net2272_ops = {
1157 .get_frame = net2272_get_frame,
1158 .wakeup = net2272_wakeup,
1159 .set_selfpowered = net2272_set_selfpowered,
1160 .pullup = net2272_pullup,
1161 .udc_start = net2272_start,
1162 .udc_stop = net2272_stop,
1163 .udc_async_callbacks = net2272_async_callbacks,
1166 /*---------------------------------------------------------------------------*/
1169 registers_show(struct device *_dev, struct device_attribute *attr, char *buf)
1171 struct net2272 *dev;
1174 unsigned long flags;
1179 dev = dev_get_drvdata(_dev);
1182 spin_lock_irqsave(&dev->lock, flags);
1184 /* Main Control Registers */
1185 t = scnprintf(next, size, "%s version %s,"
1186 "chiprev %02x, locctl %02x\n"
1187 "irqenb0 %02x irqenb1 %02x "
1188 "irqstat0 %02x irqstat1 %02x\n",
1189 driver_name, driver_vers, dev->chiprev,
1190 net2272_read(dev, LOCCTL),
1191 net2272_read(dev, IRQENB0),
1192 net2272_read(dev, IRQENB1),
1193 net2272_read(dev, IRQSTAT0),
1194 net2272_read(dev, IRQSTAT1));
1199 t1 = net2272_read(dev, DMAREQ);
1200 t = scnprintf(next, size, "\ndmareq %02x: %s %s%s%s%s\n",
1201 t1, ep_name[(t1 & 0x01) + 1],
1202 t1 & (1 << DMA_CONTROL_DACK) ? "dack " : "",
1203 t1 & (1 << DMA_REQUEST_ENABLE) ? "reqenb " : "",
1204 t1 & (1 << DMA_REQUEST) ? "req " : "",
1205 t1 & (1 << DMA_BUFFER_VALID) ? "valid " : "");
1209 /* USB Control Registers */
1210 t1 = net2272_read(dev, USBCTL1);
1211 if (t1 & (1 << VBUS_PIN)) {
1212 if (t1 & (1 << USB_HIGH_SPEED))
1214 else if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1220 t = scnprintf(next, size,
1221 "usbctl0 %02x usbctl1 %02x addr 0x%02x (%s)\n",
1222 net2272_read(dev, USBCTL0), t1,
1223 net2272_read(dev, OURADDR), s);
1227 /* Endpoint Registers */
1228 for (i = 0; i < 4; ++i) {
1229 struct net2272_ep *ep;
1235 t1 = net2272_ep_read(ep, EP_CFG);
1236 t2 = net2272_ep_read(ep, EP_RSPSET);
1237 t = scnprintf(next, size,
1238 "\n%s\tcfg %02x rsp (%02x) %s%s%s%s%s%s%s%s"
1240 ep->ep.name, t1, t2,
1241 (t2 & (1 << ALT_NAK_OUT_PACKETS)) ? "NAK " : "",
1242 (t2 & (1 << HIDE_STATUS_PHASE)) ? "hide " : "",
1243 (t2 & (1 << AUTOVALIDATE)) ? "auto " : "",
1244 (t2 & (1 << INTERRUPT_MODE)) ? "interrupt " : "",
1245 (t2 & (1 << CONTROL_STATUS_PHASE_HANDSHAKE)) ? "status " : "",
1246 (t2 & (1 << NAK_OUT_PACKETS_MODE)) ? "NAKmode " : "",
1247 (t2 & (1 << ENDPOINT_TOGGLE)) ? "DATA1 " : "DATA0 ",
1248 (t2 & (1 << ENDPOINT_HALT)) ? "HALT " : "",
1249 net2272_ep_read(ep, EP_IRQENB));
1253 t = scnprintf(next, size,
1254 "\tstat0 %02x stat1 %02x avail %04x "
1256 net2272_ep_read(ep, EP_STAT0),
1257 net2272_ep_read(ep, EP_STAT1),
1258 (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0),
1260 ep->is_in ? "in" : "out",
1261 type_string(t1 >> 5),
1262 ep->stopped ? "*" : "");
1266 t = scnprintf(next, size,
1267 "\tep_transfer %06x\n",
1268 ((net2272_ep_read(ep, EP_TRANSFER2) & 0xff) << 16) |
1269 ((net2272_ep_read(ep, EP_TRANSFER1) & 0xff) << 8) |
1270 ((net2272_ep_read(ep, EP_TRANSFER0) & 0xff)));
1274 t1 = net2272_ep_read(ep, EP_BUFF_STATES) & 0x03;
1275 t2 = (net2272_ep_read(ep, EP_BUFF_STATES) >> 2) & 0x03;
1276 t = scnprintf(next, size,
1277 "\tbuf-a %s buf-b %s\n",
1278 buf_state_string(t1),
1279 buf_state_string(t2));
1284 spin_unlock_irqrestore(&dev->lock, flags);
1286 return PAGE_SIZE - size;
1288 static DEVICE_ATTR_RO(registers);
1290 /*---------------------------------------------------------------------------*/
1293 net2272_set_fifo_mode(struct net2272 *dev, int mode)
1297 tmp = net2272_read(dev, LOCCTL) & 0x3f;
1299 net2272_write(dev, LOCCTL, tmp);
1301 INIT_LIST_HEAD(&dev->gadget.ep_list);
1303 /* always ep-a, ep-c ... maybe not ep-b */
1304 list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list);
1308 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
1309 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 512;
1312 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
1313 dev->ep[1].fifo_size = 1024;
1314 dev->ep[2].fifo_size = 512;
1317 list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
1318 dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024;
1321 dev->ep[1].fifo_size = 1024;
1325 /* ep-c is always 2 512 byte buffers */
1326 list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list);
1327 dev->ep[3].fifo_size = 512;
1330 /*---------------------------------------------------------------------------*/
1333 net2272_usb_reset(struct net2272 *dev)
1335 dev->gadget.speed = USB_SPEED_UNKNOWN;
1337 net2272_cancel_dma(dev);
1339 net2272_write(dev, IRQENB0, 0);
1340 net2272_write(dev, IRQENB1, 0);
1342 /* clear irq state */
1343 net2272_write(dev, IRQSTAT0, 0xff);
1344 net2272_write(dev, IRQSTAT1, ~(1 << SUSPEND_REQUEST_INTERRUPT));
1346 net2272_write(dev, DMAREQ,
1347 (0 << DMA_BUFFER_VALID) |
1348 (0 << DMA_REQUEST_ENABLE) |
1349 (1 << DMA_CONTROL_DACK) |
1350 (dev->dma_eot_polarity << EOT_POLARITY) |
1351 (dev->dma_dack_polarity << DACK_POLARITY) |
1352 (dev->dma_dreq_polarity << DREQ_POLARITY) |
1353 ((dma_ep >> 1) << DMA_ENDPOINT_SELECT));
1355 net2272_cancel_dma(dev);
1356 net2272_set_fifo_mode(dev, (fifo_mode <= 3) ? fifo_mode : 0);
1358 /* Set the NET2272 ep fifo data width to 16-bit mode and for correct byte swapping
1359 * note that the higher level gadget drivers are expected to convert data to little endian.
1360 * Enable byte swap for your local bus/cpu if needed by setting BYTE_SWAP in LOCCTL here
1362 net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) | (1 << DATA_WIDTH));
1363 net2272_write(dev, LOCCTL1, (dma_mode << DMA_MODE));
1367 net2272_usb_reinit(struct net2272 *dev)
1371 /* basic endpoint init */
1372 for (i = 0; i < 4; ++i) {
1373 struct net2272_ep *ep = &dev->ep[i];
1375 ep->ep.name = ep_name[i];
1380 if (use_dma && ep->num == dma_ep)
1383 if (i > 0 && i <= 3)
1384 ep->fifo_size = 512;
1387 net2272_ep_reset(ep);
1390 ep->ep.caps.type_control = true;
1392 ep->ep.caps.type_iso = true;
1393 ep->ep.caps.type_bulk = true;
1394 ep->ep.caps.type_int = true;
1397 ep->ep.caps.dir_in = true;
1398 ep->ep.caps.dir_out = true;
1400 usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64);
1402 dev->gadget.ep0 = &dev->ep[0].ep;
1403 dev->ep[0].stopped = 0;
1404 INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
1408 net2272_ep0_start(struct net2272 *dev)
1410 struct net2272_ep *ep0 = &dev->ep[0];
1412 net2272_ep_write(ep0, EP_RSPSET,
1413 (1 << NAK_OUT_PACKETS_MODE) |
1414 (1 << ALT_NAK_OUT_PACKETS));
1415 net2272_ep_write(ep0, EP_RSPCLR,
1416 (1 << HIDE_STATUS_PHASE) |
1417 (1 << CONTROL_STATUS_PHASE_HANDSHAKE));
1418 net2272_write(dev, USBCTL0,
1419 (dev->softconnect << USB_DETECT_ENABLE) |
1420 (1 << USB_ROOT_PORT_WAKEUP_ENABLE) |
1421 (1 << IO_WAKEUP_ENABLE));
1422 net2272_write(dev, IRQENB0,
1423 (1 << SETUP_PACKET_INTERRUPT_ENABLE) |
1424 (1 << ENDPOINT_0_INTERRUPT_ENABLE) |
1425 (1 << DMA_DONE_INTERRUPT_ENABLE));
1426 net2272_write(dev, IRQENB1,
1427 (1 << VBUS_INTERRUPT_ENABLE) |
1428 (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) |
1429 (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE));
1432 /* when a driver is successfully registered, it will receive
1433 * control requests including set_configuration(), which enables
1434 * non-control requests. then usb traffic follows until a
1435 * disconnect is reported. then a host may connect again, or
1436 * the driver might get unbound.
1438 static int net2272_start(struct usb_gadget *_gadget,
1439 struct usb_gadget_driver *driver)
1441 struct net2272 *dev;
1444 if (!driver || !driver->setup ||
1445 driver->max_speed != USB_SPEED_HIGH)
1448 dev = container_of(_gadget, struct net2272, gadget);
1450 for (i = 0; i < 4; ++i)
1451 dev->ep[i].irqs = 0;
1452 /* hook up the driver ... */
1453 dev->softconnect = 1;
1454 driver->driver.bus = NULL;
1455 dev->driver = driver;
1457 /* ... then enable host detection and ep0; and we're ready
1458 * for set_configuration as well as eventual disconnect.
1460 net2272_ep0_start(dev);
1466 stop_activity(struct net2272 *dev, struct usb_gadget_driver *driver)
1470 /* don't disconnect if it's not connected */
1471 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1474 /* stop hardware; prevent new request submissions;
1475 * and kill any outstanding requests.
1477 net2272_usb_reset(dev);
1478 for (i = 0; i < 4; ++i)
1479 net2272_dequeue_all(&dev->ep[i]);
1481 /* report disconnect; the driver is already quiesced */
1482 if (dev->async_callbacks && driver) {
1483 spin_unlock(&dev->lock);
1484 driver->disconnect(&dev->gadget);
1485 spin_lock(&dev->lock);
1488 net2272_usb_reinit(dev);
1491 static int net2272_stop(struct usb_gadget *_gadget)
1493 struct net2272 *dev;
1494 unsigned long flags;
1496 dev = container_of(_gadget, struct net2272, gadget);
1498 spin_lock_irqsave(&dev->lock, flags);
1499 stop_activity(dev, NULL);
1500 spin_unlock_irqrestore(&dev->lock, flags);
1507 static void net2272_async_callbacks(struct usb_gadget *_gadget, bool enable)
1509 struct net2272 *dev = container_of(_gadget, struct net2272, gadget);
1511 spin_lock_irq(&dev->lock);
1512 dev->async_callbacks = enable;
1513 spin_unlock_irq(&dev->lock);
1516 /*---------------------------------------------------------------------------*/
1517 /* handle ep-a/ep-b dma completions */
1519 net2272_handle_dma(struct net2272_ep *ep)
1521 struct net2272_request *req;
1525 if (!list_empty(&ep->queue))
1526 req = list_entry(ep->queue.next,
1527 struct net2272_request, queue);
1531 dev_vdbg(ep->dev->dev, "handle_dma %s req %p\n", ep->ep.name, req);
1533 /* Ensure DREQ is de-asserted */
1534 net2272_write(ep->dev, DMAREQ,
1535 (0 << DMA_BUFFER_VALID)
1536 | (0 << DMA_REQUEST_ENABLE)
1537 | (1 << DMA_CONTROL_DACK)
1538 | (ep->dev->dma_eot_polarity << EOT_POLARITY)
1539 | (ep->dev->dma_dack_polarity << DACK_POLARITY)
1540 | (ep->dev->dma_dreq_polarity << DREQ_POLARITY)
1541 | (ep->dma << DMA_ENDPOINT_SELECT));
1543 ep->dev->dma_busy = 0;
1545 net2272_ep_write(ep, EP_IRQENB,
1546 (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
1547 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
1548 | net2272_ep_read(ep, EP_IRQENB));
1550 /* device-to-host transfer completed */
1552 /* validate a short packet or zlp if necessary */
1553 if ((req->req.length % ep->ep.maxpacket != 0) ||
1555 set_fifo_bytecount(ep, 0);
1557 net2272_done(ep, req, 0);
1558 if (!list_empty(&ep->queue)) {
1559 req = list_entry(ep->queue.next,
1560 struct net2272_request, queue);
1561 status = net2272_kick_dma(ep, req);
1563 net2272_pio_advance(ep);
1566 /* host-to-device transfer completed */
1568 /* terminated with a short packet? */
1569 if (net2272_read(ep->dev, IRQSTAT0) &
1570 (1 << DMA_DONE_INTERRUPT)) {
1571 /* abort system dma */
1572 net2272_cancel_dma(ep->dev);
1575 /* EP_TRANSFER will contain the number of bytes
1576 * actually received.
1577 * NOTE: There is no overflow detection on EP_TRANSFER:
1578 * We can't deal with transfers larger than 2^24 bytes!
1580 len = (net2272_ep_read(ep, EP_TRANSFER2) << 16)
1581 | (net2272_ep_read(ep, EP_TRANSFER1) << 8)
1582 | (net2272_ep_read(ep, EP_TRANSFER0));
1587 req->req.actual += len;
1589 /* get any remaining data */
1590 net2272_pio_advance(ep);
1594 /*---------------------------------------------------------------------------*/
1597 net2272_handle_ep(struct net2272_ep *ep)
1599 struct net2272_request *req;
1602 if (!list_empty(&ep->queue))
1603 req = list_entry(ep->queue.next,
1604 struct net2272_request, queue);
1608 /* ack all, and handle what we care about */
1609 stat0 = net2272_ep_read(ep, EP_STAT0);
1610 stat1 = net2272_ep_read(ep, EP_STAT1);
1613 dev_vdbg(ep->dev->dev, "%s ack ep_stat0 %02x, ep_stat1 %02x, req %p\n",
1614 ep->ep.name, stat0, stat1, req ? &req->req : NULL);
1616 net2272_ep_write(ep, EP_STAT0, stat0 &
1617 ~((1 << NAK_OUT_PACKETS)
1618 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)));
1619 net2272_ep_write(ep, EP_STAT1, stat1);
1621 /* data packet(s) received (in the fifo, OUT)
1622 * direction must be validated, otherwise control read status phase
1623 * could be interpreted as a valid packet
1625 if (!ep->is_in && (stat0 & (1 << DATA_PACKET_RECEIVED_INTERRUPT)))
1626 net2272_pio_advance(ep);
1627 /* data packet(s) transmitted (IN) */
1628 else if (stat0 & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT))
1629 net2272_pio_advance(ep);
1632 static struct net2272_ep *
1633 net2272_get_ep_by_addr(struct net2272 *dev, u16 wIndex)
1635 struct net2272_ep *ep;
1637 if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
1640 list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) {
1641 u8 bEndpointAddress;
1645 bEndpointAddress = ep->desc->bEndpointAddress;
1646 if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
1648 if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f))
1659 * JJJJJJJKKKKKKK * 8
1661 * {JKKKKKKK * 10}, JK
1663 static const u8 net2272_test_packet[] = {
1664 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1665 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
1666 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
1667 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
1668 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
1669 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFD, 0x7E
1673 net2272_set_test_mode(struct net2272 *dev, int mode)
1677 /* Disable all net2272 interrupts:
1678 * Nothing but a power cycle should stop the test.
1680 net2272_write(dev, IRQENB0, 0x00);
1681 net2272_write(dev, IRQENB1, 0x00);
1683 /* Force tranceiver to high-speed */
1684 net2272_write(dev, XCVRDIAG, 1 << FORCE_HIGH_SPEED);
1686 net2272_write(dev, PAGESEL, 0);
1687 net2272_write(dev, EP_STAT0, 1 << DATA_PACKET_TRANSMITTED_INTERRUPT);
1688 net2272_write(dev, EP_RSPCLR,
1689 (1 << CONTROL_STATUS_PHASE_HANDSHAKE)
1690 | (1 << HIDE_STATUS_PHASE));
1691 net2272_write(dev, EP_CFG, 1 << ENDPOINT_DIRECTION);
1692 net2272_write(dev, EP_STAT1, 1 << BUFFER_FLUSH);
1694 /* wait for status phase to complete */
1695 while (!(net2272_read(dev, EP_STAT0) &
1696 (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)))
1699 /* Enable test mode */
1700 net2272_write(dev, USBTEST, mode);
1702 /* load test packet */
1703 if (mode == USB_TEST_PACKET) {
1704 /* switch to 8 bit mode */
1705 net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) &
1706 ~(1 << DATA_WIDTH));
1708 for (i = 0; i < sizeof(net2272_test_packet); ++i)
1709 net2272_write(dev, EP_DATA, net2272_test_packet[i]);
1711 /* Validate test packet */
1712 net2272_write(dev, EP_TRANSFER0, 0);
1717 net2272_handle_stat0_irqs(struct net2272 *dev, u8 stat)
1719 struct net2272_ep *ep;
1722 /* starting a control request? */
1723 if (unlikely(stat & (1 << SETUP_PACKET_INTERRUPT))) {
1726 struct usb_ctrlrequest r;
1729 struct net2272_request *req;
1731 if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
1732 if (net2272_read(dev, USBCTL1) & (1 << USB_HIGH_SPEED))
1733 dev->gadget.speed = USB_SPEED_HIGH;
1735 dev->gadget.speed = USB_SPEED_FULL;
1736 dev_dbg(dev->dev, "%s\n",
1737 usb_speed_string(dev->gadget.speed));
1743 /* make sure any leftover interrupt state is cleared */
1744 stat &= ~(1 << ENDPOINT_0_INTERRUPT);
1745 while (!list_empty(&ep->queue)) {
1746 req = list_entry(ep->queue.next,
1747 struct net2272_request, queue);
1748 net2272_done(ep, req,
1749 (req->req.actual == req->req.length) ? 0 : -EPROTO);
1752 dev->protocol_stall = 0;
1753 net2272_ep_write(ep, EP_STAT0,
1754 (1 << DATA_IN_TOKEN_INTERRUPT)
1755 | (1 << DATA_OUT_TOKEN_INTERRUPT)
1756 | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
1757 | (1 << DATA_PACKET_RECEIVED_INTERRUPT)
1758 | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT));
1759 net2272_ep_write(ep, EP_STAT1,
1761 | (1 << USB_OUT_ACK_SENT)
1762 | (1 << USB_OUT_NAK_SENT)
1763 | (1 << USB_IN_ACK_RCVD)
1764 | (1 << USB_IN_NAK_SENT)
1765 | (1 << USB_STALL_SENT)
1766 | (1 << LOCAL_OUT_ZLP));
1769 * Ensure Control Read pre-validation setting is beyond maximum size
1770 * - Control Writes can leave non-zero values in EP_TRANSFER. If
1771 * an EP0 transfer following the Control Write is a Control Read,
1772 * the NET2272 sees the non-zero EP_TRANSFER as an unexpected
1773 * pre-validation count.
1774 * - Setting EP_TRANSFER beyond the maximum EP0 transfer size ensures
1775 * the pre-validation count cannot cause an unexpected validatation
1777 net2272_write(dev, PAGESEL, 0);
1778 net2272_write(dev, EP_TRANSFER2, 0xff);
1779 net2272_write(dev, EP_TRANSFER1, 0xff);
1780 net2272_write(dev, EP_TRANSFER0, 0xff);
1782 u.raw[0] = net2272_read(dev, SETUP0);
1783 u.raw[1] = net2272_read(dev, SETUP1);
1784 u.raw[2] = net2272_read(dev, SETUP2);
1785 u.raw[3] = net2272_read(dev, SETUP3);
1786 u.raw[4] = net2272_read(dev, SETUP4);
1787 u.raw[5] = net2272_read(dev, SETUP5);
1788 u.raw[6] = net2272_read(dev, SETUP6);
1789 u.raw[7] = net2272_read(dev, SETUP7);
1791 * If you have a big endian cpu make sure le16_to_cpus
1792 * performs the proper byte swapping here...
1794 le16_to_cpus(&u.r.wValue);
1795 le16_to_cpus(&u.r.wIndex);
1796 le16_to_cpus(&u.r.wLength);
1799 net2272_write(dev, IRQSTAT0, 1 << SETUP_PACKET_INTERRUPT);
1800 stat ^= (1 << SETUP_PACKET_INTERRUPT);
1802 /* watch control traffic at the token level, and force
1803 * synchronization before letting the status phase happen.
1805 ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0;
1807 scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
1808 | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE)
1809 | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE);
1810 stop_out_naking(ep);
1812 scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
1813 | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE)
1814 | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE);
1815 net2272_ep_write(ep, EP_IRQENB, scratch);
1817 if ((u.r.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD)
1819 switch (u.r.bRequest) {
1820 case USB_REQ_GET_STATUS: {
1821 struct net2272_ep *e;
1824 switch (u.r.bRequestType & USB_RECIP_MASK) {
1825 case USB_RECIP_ENDPOINT:
1826 e = net2272_get_ep_by_addr(dev, u.r.wIndex);
1827 if (!e || u.r.wLength > 2)
1829 if (net2272_ep_read(e, EP_RSPSET) & (1 << ENDPOINT_HALT))
1830 status = cpu_to_le16(1);
1832 status = cpu_to_le16(0);
1834 /* don't bother with a request object! */
1835 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
1836 writew(status, net2272_reg_addr(dev, EP_DATA));
1837 set_fifo_bytecount(&dev->ep[0], 0);
1839 dev_vdbg(dev->dev, "%s stat %02x\n",
1840 ep->ep.name, status);
1841 goto next_endpoints;
1842 case USB_RECIP_DEVICE:
1843 if (u.r.wLength > 2)
1845 if (dev->gadget.is_selfpowered)
1846 status = (1 << USB_DEVICE_SELF_POWERED);
1848 /* don't bother with a request object! */
1849 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
1850 writew(status, net2272_reg_addr(dev, EP_DATA));
1851 set_fifo_bytecount(&dev->ep[0], 0);
1853 dev_vdbg(dev->dev, "device stat %02x\n", status);
1854 goto next_endpoints;
1855 case USB_RECIP_INTERFACE:
1856 if (u.r.wLength > 2)
1859 /* don't bother with a request object! */
1860 net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
1861 writew(status, net2272_reg_addr(dev, EP_DATA));
1862 set_fifo_bytecount(&dev->ep[0], 0);
1864 dev_vdbg(dev->dev, "interface status %02x\n", status);
1865 goto next_endpoints;
1870 case USB_REQ_CLEAR_FEATURE: {
1871 struct net2272_ep *e;
1873 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1875 if (u.r.wValue != USB_ENDPOINT_HALT ||
1878 e = net2272_get_ep_by_addr(dev, u.r.wIndex);
1882 dev_vdbg(dev->dev, "%s wedged, halt not cleared\n",
1885 dev_vdbg(dev->dev, "%s clear halt\n", ep->ep.name);
1889 goto next_endpoints;
1891 case USB_REQ_SET_FEATURE: {
1892 struct net2272_ep *e;
1894 if (u.r.bRequestType == USB_RECIP_DEVICE) {
1895 if (u.r.wIndex != NORMAL_OPERATION)
1896 net2272_set_test_mode(dev, (u.r.wIndex >> 8));
1898 dev_vdbg(dev->dev, "test mode: %d\n", u.r.wIndex);
1899 goto next_endpoints;
1900 } else if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1902 if (u.r.wValue != USB_ENDPOINT_HALT ||
1905 e = net2272_get_ep_by_addr(dev, u.r.wIndex);
1910 dev_vdbg(dev->dev, "%s set halt\n", ep->ep.name);
1911 goto next_endpoints;
1913 case USB_REQ_SET_ADDRESS: {
1914 net2272_write(dev, OURADDR, u.r.wValue & 0xff);
1920 dev_vdbg(dev->dev, "setup %02x.%02x v%04x i%04x "
1922 u.r.bRequestType, u.r.bRequest,
1923 u.r.wValue, u.r.wIndex,
1924 net2272_ep_read(ep, EP_CFG));
1925 if (dev->async_callbacks) {
1926 spin_unlock(&dev->lock);
1927 tmp = dev->driver->setup(&dev->gadget, &u.r);
1928 spin_lock(&dev->lock);
1932 /* stall ep0 on error */
1935 dev_vdbg(dev->dev, "req %02x.%02x protocol STALL; stat %d\n",
1936 u.r.bRequestType, u.r.bRequest, tmp);
1937 dev->protocol_stall = 1;
1939 /* endpoint dma irq? */
1940 } else if (stat & (1 << DMA_DONE_INTERRUPT)) {
1941 net2272_cancel_dma(dev);
1942 net2272_write(dev, IRQSTAT0, 1 << DMA_DONE_INTERRUPT);
1943 stat &= ~(1 << DMA_DONE_INTERRUPT);
1944 num = (net2272_read(dev, DMAREQ) & (1 << DMA_ENDPOINT_SELECT))
1948 net2272_handle_dma(ep);
1952 /* endpoint data irq? */
1953 scratch = stat & 0x0f;
1955 for (num = 0; scratch; num++) {
1958 /* does this endpoint's FIFO and queue need tending? */
1960 if ((scratch & t) == 0)
1965 net2272_handle_ep(ep);
1968 /* some interrupts we can just ignore */
1969 stat &= ~(1 << SOF_INTERRUPT);
1972 dev_dbg(dev->dev, "unhandled irqstat0 %02x\n", stat);
1976 net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat)
1980 /* after disconnect there's nothing else to do! */
1981 tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT);
1982 mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED);
1986 bool disconnect = false;
1989 * Ignore disconnects and resets if the speed hasn't been set.
1990 * VBUS can bounce and there's always an initial reset.
1992 net2272_write(dev, IRQSTAT1, tmp);
1993 if (dev->gadget.speed != USB_SPEED_UNKNOWN) {
1994 if ((stat & (1 << VBUS_INTERRUPT)) &&
1995 (net2272_read(dev, USBCTL1) &
1996 (1 << VBUS_PIN)) == 0) {
1998 dev_dbg(dev->dev, "disconnect %s\n",
1999 dev->driver->driver.name);
2000 } else if ((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) &&
2001 (net2272_read(dev, USBCTL1) & mask)
2004 dev_dbg(dev->dev, "reset %s\n",
2005 dev->driver->driver.name);
2008 if (disconnect || reset) {
2009 stop_activity(dev, dev->driver);
2010 net2272_ep0_start(dev);
2011 if (dev->async_callbacks) {
2012 spin_unlock(&dev->lock);
2014 usb_gadget_udc_reset(&dev->gadget, dev->driver);
2016 (dev->driver->disconnect)(&dev->gadget);
2017 spin_lock(&dev->lock);
2028 tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT);
2030 net2272_write(dev, IRQSTAT1, tmp);
2031 if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) {
2032 if (dev->async_callbacks && dev->driver->suspend)
2033 dev->driver->suspend(&dev->gadget);
2034 if (!enable_suspend) {
2035 stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT);
2036 dev_dbg(dev->dev, "Suspend disabled, ignoring\n");
2039 if (dev->async_callbacks && dev->driver->resume)
2040 dev->driver->resume(&dev->gadget);
2045 /* clear any other status/irqs */
2047 net2272_write(dev, IRQSTAT1, stat);
2049 /* some status we can just ignore */
2050 stat &= ~((1 << CONTROL_STATUS_INTERRUPT)
2051 | (1 << SUSPEND_REQUEST_INTERRUPT)
2052 | (1 << RESUME_INTERRUPT));
2056 dev_dbg(dev->dev, "unhandled irqstat1 %02x\n", stat);
2059 static irqreturn_t net2272_irq(int irq, void *_dev)
2061 struct net2272 *dev = _dev;
2062 #if defined(PLX_PCI_RDK) || defined(PLX_PCI_RDK2)
2065 #if defined(PLX_PCI_RDK)
2068 spin_lock(&dev->lock);
2069 #if defined(PLX_PCI_RDK)
2070 intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR);
2072 if ((intcsr & LOCAL_INTERRUPT_TEST) == LOCAL_INTERRUPT_TEST) {
2073 writel(intcsr & ~(1 << PCI_INTERRUPT_ENABLE),
2074 dev->rdk1.plx9054_base_addr + INTCSR);
2075 net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1));
2076 net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0));
2077 intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR);
2078 writel(intcsr | (1 << PCI_INTERRUPT_ENABLE),
2079 dev->rdk1.plx9054_base_addr + INTCSR);
2081 if ((intcsr & DMA_CHANNEL_0_TEST) == DMA_CHANNEL_0_TEST) {
2082 writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)),
2083 dev->rdk1.plx9054_base_addr + DMACSR0);
2085 dmareq = net2272_read(dev, DMAREQ);
2087 net2272_handle_dma(&dev->ep[2]);
2089 net2272_handle_dma(&dev->ep[1]);
2092 #if defined(PLX_PCI_RDK2)
2093 /* see if PCI int for us by checking irqstat */
2094 intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT);
2095 if (!(intcsr & (1 << NET2272_PCI_IRQ))) {
2096 spin_unlock(&dev->lock);
2099 /* check dma interrupts */
2101 /* Platform/devcice interrupt handler */
2102 #if !defined(PLX_PCI_RDK)
2103 net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1));
2104 net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0));
2106 spin_unlock(&dev->lock);
2111 static int net2272_present(struct net2272 *dev)
2114 * Quick test to see if CPU can communicate properly with the NET2272.
2115 * Verifies connection using writes and reads to write/read and
2116 * read-only registers.
2118 * This routine is strongly recommended especially during early bring-up
2119 * of new hardware, however for designs that do not apply Power On System
2120 * Tests (POST) it may discarded (or perhaps minimized).
2125 /* Verify NET2272 write/read SCRATCH register can write and read */
2126 refval = net2272_read(dev, SCRATCH);
2127 for (ii = 0; ii < 0x100; ii += 7) {
2128 net2272_write(dev, SCRATCH, ii);
2129 val = net2272_read(dev, SCRATCH);
2132 "%s: write/read SCRATCH register test failed: "
2133 "wrote:0x%2.2x, read:0x%2.2x\n",
2138 /* To be nice, we write the original SCRATCH value back: */
2139 net2272_write(dev, SCRATCH, refval);
2141 /* Verify NET2272 CHIPREV register is read-only: */
2142 refval = net2272_read(dev, CHIPREV_2272);
2143 for (ii = 0; ii < 0x100; ii += 7) {
2144 net2272_write(dev, CHIPREV_2272, ii);
2145 val = net2272_read(dev, CHIPREV_2272);
2146 if (val != refval) {
2148 "%s: write/read CHIPREV register test failed: "
2149 "wrote 0x%2.2x, read:0x%2.2x expected:0x%2.2x\n",
2150 __func__, ii, val, refval);
2156 * Verify NET2272's "NET2270 legacy revision" register
2157 * - NET2272 has two revision registers. The NET2270 legacy revision
2158 * register should read the same value, regardless of the NET2272
2159 * silicon revision. The legacy register applies to NET2270
2160 * firmware being applied to the NET2272.
2162 val = net2272_read(dev, CHIPREV_LEGACY);
2163 if (val != NET2270_LEGACY_REV) {
2165 * Unexpected legacy revision value
2166 * - Perhaps the chip is a NET2270?
2169 "%s: WARNING: UNEXPECTED NET2272 LEGACY REGISTER VALUE:\n"
2170 " - CHIPREV_LEGACY: expected 0x%2.2x, got:0x%2.2x. (Not NET2272?)\n",
2171 __func__, NET2270_LEGACY_REV, val);
2176 * Verify NET2272 silicon revision
2177 * - This revision register is appropriate for the silicon version
2180 val = net2272_read(dev, CHIPREV_2272);
2182 case CHIPREV_NET2272_R1:
2184 * NET2272 Rev 1 has DMA related errata:
2185 * - Newer silicon (Rev 1A or better) required
2188 "%s: Rev 1 detected: newer silicon recommended for DMA support\n",
2191 case CHIPREV_NET2272_R1A:
2194 /* NET2272 silicon version *may* not work with this firmware */
2196 "%s: unexpected silicon revision register value: "
2197 " CHIPREV_2272: 0x%2.2x\n",
2200 * Return Success, even though the chip rev is not an expected value
2201 * - Older, pre-built firmware can attempt to operate on newer silicon
2202 * - Often, new silicon is perfectly compatible
2206 /* Success: NET2272 checks out OK */
2211 net2272_gadget_release(struct device *_dev)
2213 struct net2272 *dev = container_of(_dev, struct net2272, gadget.dev);
2218 /*---------------------------------------------------------------------------*/
2221 net2272_remove(struct net2272 *dev)
2224 usb_del_gadget(&dev->gadget);
2225 free_irq(dev->irq, dev);
2226 iounmap(dev->base_addr);
2227 device_remove_file(dev->dev, &dev_attr_registers);
2229 dev_info(dev->dev, "unbind\n");
2232 static struct net2272 *net2272_probe_init(struct device *dev, unsigned int irq)
2234 struct net2272 *ret;
2237 dev_dbg(dev, "No IRQ!\n");
2238 return ERR_PTR(-ENODEV);
2241 /* alloc, and start init */
2242 ret = kzalloc(sizeof(*ret), GFP_KERNEL);
2244 return ERR_PTR(-ENOMEM);
2246 spin_lock_init(&ret->lock);
2249 ret->gadget.ops = &net2272_ops;
2250 ret->gadget.max_speed = USB_SPEED_HIGH;
2252 /* the "gadget" abstracts/virtualizes the controller */
2253 ret->gadget.name = driver_name;
2254 usb_initialize_gadget(dev, &ret->gadget, net2272_gadget_release);
2260 net2272_probe_fin(struct net2272 *dev, unsigned int irqflags)
2264 /* See if there... */
2265 if (net2272_present(dev)) {
2266 dev_warn(dev->dev, "2272 not found!\n");
2271 net2272_usb_reset(dev);
2272 net2272_usb_reinit(dev);
2274 ret = request_irq(dev->irq, net2272_irq, irqflags, driver_name, dev);
2276 dev_err(dev->dev, "request interrupt %i failed\n", dev->irq);
2280 dev->chiprev = net2272_read(dev, CHIPREV_2272);
2283 dev_info(dev->dev, "%s\n", driver_desc);
2284 dev_info(dev->dev, "irq %i, mem %p, chip rev %04x, dma %s\n",
2285 dev->irq, dev->base_addr, dev->chiprev,
2287 dev_info(dev->dev, "version: %s\n", driver_vers);
2289 ret = device_create_file(dev->dev, &dev_attr_registers);
2293 ret = usb_add_gadget(&dev->gadget);
2301 device_remove_file(dev->dev, &dev_attr_registers);
2303 free_irq(dev->irq, dev);
2308 #ifdef CONFIG_USB_PCI
2311 * wrap this driver around the specified device, but
2312 * don't respond over USB until a gadget driver binds to us
2316 net2272_rdk1_probe(struct pci_dev *pdev, struct net2272 *dev)
2318 unsigned long resource, len, tmp;
2319 void __iomem *mem_mapped_addr[4];
2323 * BAR 0 holds PLX 9054 config registers
2324 * BAR 1 is i/o memory; unused here
2325 * BAR 2 holds EPLD config registers
2326 * BAR 3 holds NET2272 registers
2329 /* Find and map all address spaces */
2330 for (i = 0; i < 4; ++i) {
2332 continue; /* BAR1 unused */
2334 resource = pci_resource_start(pdev, i);
2335 len = pci_resource_len(pdev, i);
2337 if (!request_mem_region(resource, len, driver_name)) {
2338 dev_dbg(dev->dev, "controller already in use\n");
2343 mem_mapped_addr[i] = ioremap(resource, len);
2344 if (mem_mapped_addr[i] == NULL) {
2345 release_mem_region(resource, len);
2346 dev_dbg(dev->dev, "can't map memory\n");
2352 dev->rdk1.plx9054_base_addr = mem_mapped_addr[0];
2353 dev->rdk1.epld_base_addr = mem_mapped_addr[2];
2354 dev->base_addr = mem_mapped_addr[3];
2356 /* Set PLX 9054 bus width (16 bits) */
2357 tmp = readl(dev->rdk1.plx9054_base_addr + LBRD1);
2358 writel((tmp & ~(3 << MEMORY_SPACE_LOCAL_BUS_WIDTH)) | W16_BIT,
2359 dev->rdk1.plx9054_base_addr + LBRD1);
2361 /* Enable PLX 9054 Interrupts */
2362 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) |
2363 (1 << PCI_INTERRUPT_ENABLE) |
2364 (1 << LOCAL_INTERRUPT_INPUT_ENABLE),
2365 dev->rdk1.plx9054_base_addr + INTCSR);
2367 writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)),
2368 dev->rdk1.plx9054_base_addr + DMACSR0);
2371 writeb((1 << EPLD_DMA_ENABLE) |
2372 (1 << DMA_CTL_DACK) |
2373 (1 << DMA_TIMEOUT_ENABLE) |
2377 (1 << NET2272_RESET),
2378 dev->base_addr + EPLD_IO_CONTROL_REGISTER);
2381 writeb(readb(dev->base_addr + EPLD_IO_CONTROL_REGISTER) &
2382 ~(1 << NET2272_RESET),
2383 dev->base_addr + EPLD_IO_CONTROL_REGISTER);
2391 continue; /* BAR1 unused */
2392 iounmap(mem_mapped_addr[i]);
2393 release_mem_region(pci_resource_start(pdev, i),
2394 pci_resource_len(pdev, i));
2401 net2272_rdk2_probe(struct pci_dev *pdev, struct net2272 *dev)
2403 unsigned long resource, len;
2404 void __iomem *mem_mapped_addr[2];
2408 * BAR 0 holds FGPA config registers
2409 * BAR 1 holds NET2272 registers
2412 /* Find and map all address spaces, bar2-3 unused in rdk 2 */
2413 for (i = 0; i < 2; ++i) {
2414 resource = pci_resource_start(pdev, i);
2415 len = pci_resource_len(pdev, i);
2417 if (!request_mem_region(resource, len, driver_name)) {
2418 dev_dbg(dev->dev, "controller already in use\n");
2423 mem_mapped_addr[i] = ioremap(resource, len);
2424 if (mem_mapped_addr[i] == NULL) {
2425 release_mem_region(resource, len);
2426 dev_dbg(dev->dev, "can't map memory\n");
2432 dev->rdk2.fpga_base_addr = mem_mapped_addr[0];
2433 dev->base_addr = mem_mapped_addr[1];
2436 /* Set 2272 bus width (16 bits) and reset */
2437 writel((1 << CHIP_RESET), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK);
2439 writel((1 << BUS_WIDTH), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK);
2440 /* Print fpga version number */
2441 dev_info(dev->dev, "RDK2 FPGA version %08x\n",
2442 readl(dev->rdk2.fpga_base_addr + RDK2_FPGAREV));
2443 /* Enable FPGA Interrupts */
2444 writel((1 << NET2272_PCI_IRQ), dev->rdk2.fpga_base_addr + RDK2_IRQENB);
2450 iounmap(mem_mapped_addr[i]);
2451 release_mem_region(pci_resource_start(pdev, i),
2452 pci_resource_len(pdev, i));
2459 net2272_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2461 struct net2272 *dev;
2464 dev = net2272_probe_init(&pdev->dev, pdev->irq);
2466 return PTR_ERR(dev);
2467 dev->dev_id = pdev->device;
2469 if (pci_enable_device(pdev) < 0) {
2474 pci_set_master(pdev);
2476 switch (pdev->device) {
2477 case PCI_DEVICE_ID_RDK1: ret = net2272_rdk1_probe(pdev, dev); break;
2478 case PCI_DEVICE_ID_RDK2: ret = net2272_rdk2_probe(pdev, dev); break;
2484 ret = net2272_probe_fin(dev, 0);
2488 pci_set_drvdata(pdev, dev);
2493 pci_disable_device(pdev);
2495 usb_put_gadget(&dev->gadget);
2501 net2272_rdk1_remove(struct pci_dev *pdev, struct net2272 *dev)
2505 /* disable PLX 9054 interrupts */
2506 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) &
2507 ~(1 << PCI_INTERRUPT_ENABLE),
2508 dev->rdk1.plx9054_base_addr + INTCSR);
2510 /* clean up resources allocated during probe() */
2511 iounmap(dev->rdk1.plx9054_base_addr);
2512 iounmap(dev->rdk1.epld_base_addr);
2514 for (i = 0; i < 4; ++i) {
2516 continue; /* BAR1 unused */
2517 release_mem_region(pci_resource_start(pdev, i),
2518 pci_resource_len(pdev, i));
2523 net2272_rdk2_remove(struct pci_dev *pdev, struct net2272 *dev)
2527 /* disable fpga interrupts
2528 writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) &
2529 ~(1 << PCI_INTERRUPT_ENABLE),
2530 dev->rdk1.plx9054_base_addr + INTCSR);
2533 /* clean up resources allocated during probe() */
2534 iounmap(dev->rdk2.fpga_base_addr);
2536 for (i = 0; i < 2; ++i)
2537 release_mem_region(pci_resource_start(pdev, i),
2538 pci_resource_len(pdev, i));
2542 net2272_pci_remove(struct pci_dev *pdev)
2544 struct net2272 *dev = pci_get_drvdata(pdev);
2546 net2272_remove(dev);
2548 switch (pdev->device) {
2549 case PCI_DEVICE_ID_RDK1: net2272_rdk1_remove(pdev, dev); break;
2550 case PCI_DEVICE_ID_RDK2: net2272_rdk2_remove(pdev, dev); break;
2554 pci_disable_device(pdev);
2556 usb_put_gadget(&dev->gadget);
2559 /* Table of matching PCI IDs */
2560 static struct pci_device_id pci_ids[] = {
2562 .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe),
2564 .vendor = PCI_VENDOR_ID_PLX,
2565 .device = PCI_DEVICE_ID_RDK1,
2566 .subvendor = PCI_ANY_ID,
2567 .subdevice = PCI_ANY_ID,
2570 .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe),
2572 .vendor = PCI_VENDOR_ID_PLX,
2573 .device = PCI_DEVICE_ID_RDK2,
2574 .subvendor = PCI_ANY_ID,
2575 .subdevice = PCI_ANY_ID,
2579 MODULE_DEVICE_TABLE(pci, pci_ids);
2581 static struct pci_driver net2272_pci_driver = {
2582 .name = driver_name,
2583 .id_table = pci_ids,
2585 .probe = net2272_pci_probe,
2586 .remove = net2272_pci_remove,
2589 static int net2272_pci_register(void)
2591 return pci_register_driver(&net2272_pci_driver);
2594 static void net2272_pci_unregister(void)
2596 pci_unregister_driver(&net2272_pci_driver);
2600 static inline int net2272_pci_register(void) { return 0; }
2601 static inline void net2272_pci_unregister(void) { }
2604 /*---------------------------------------------------------------------------*/
2607 net2272_plat_probe(struct platform_device *pdev)
2609 struct net2272 *dev;
2611 unsigned int irqflags;
2612 resource_size_t base, len;
2613 struct resource *iomem, *iomem_bus, *irq_res;
2615 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2616 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2617 iomem_bus = platform_get_resource(pdev, IORESOURCE_BUS, 0);
2618 if (!irq_res || !iomem) {
2619 dev_err(&pdev->dev, "must provide irq/base addr");
2623 dev = net2272_probe_init(&pdev->dev, irq_res->start);
2625 return PTR_ERR(dev);
2628 if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE)
2629 irqflags |= IRQF_TRIGGER_RISING;
2630 if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE)
2631 irqflags |= IRQF_TRIGGER_FALLING;
2632 if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL)
2633 irqflags |= IRQF_TRIGGER_HIGH;
2634 if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL)
2635 irqflags |= IRQF_TRIGGER_LOW;
2637 base = iomem->start;
2638 len = resource_size(iomem);
2640 dev->base_shift = iomem_bus->start;
2642 if (!request_mem_region(base, len, driver_name)) {
2643 dev_dbg(dev->dev, "get request memory region!\n");
2647 dev->base_addr = ioremap(base, len);
2648 if (!dev->base_addr) {
2649 dev_dbg(dev->dev, "can't map memory\n");
2654 ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW);
2658 platform_set_drvdata(pdev, dev);
2659 dev_info(&pdev->dev, "running in 16-bit, %sbyte swap local bus mode\n",
2660 (net2272_read(dev, LOCCTL) & (1 << BYTE_SWAP)) ? "" : "no ");
2665 iounmap(dev->base_addr);
2667 release_mem_region(base, len);
2669 usb_put_gadget(&dev->gadget);
2675 net2272_plat_remove(struct platform_device *pdev)
2677 struct net2272 *dev = platform_get_drvdata(pdev);
2679 net2272_remove(dev);
2681 release_mem_region(pdev->resource[0].start,
2682 resource_size(&pdev->resource[0]));
2684 usb_put_gadget(&dev->gadget);
2689 static struct platform_driver net2272_plat_driver = {
2690 .probe = net2272_plat_probe,
2691 .remove = net2272_plat_remove,
2693 .name = driver_name,
2695 /* FIXME .suspend, .resume */
2697 MODULE_ALIAS("platform:net2272");
2699 static int __init net2272_init(void)
2703 ret = net2272_pci_register();
2706 ret = platform_driver_register(&net2272_plat_driver);
2712 net2272_pci_unregister();
2715 module_init(net2272_init);
2717 static void __exit net2272_cleanup(void)
2719 net2272_pci_unregister();
2720 platform_driver_unregister(&net2272_plat_driver);
2722 module_exit(net2272_cleanup);
2724 MODULE_DESCRIPTION(DRIVER_DESC);
2725 MODULE_AUTHOR("PLX Technology, Inc.");
2726 MODULE_LICENSE("GPL");