1 // SPDX-License-Identifier: GPL-2.0
3 * FOTG210 UDC Driver supports Bulk transfer so far
5 * Copyright (C) 2013 Faraday Technology Corporation
7 * Author : Yuan-Hsin Chen <yhchen@faraday-tech.com>
10 #include <linux/dma-mapping.h>
11 #include <linux/err.h>
12 #include <linux/interrupt.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/usb/ch9.h>
17 #include <linux/usb/gadget.h>
21 #define DRIVER_DESC "FOTG210 USB Device Controller Driver"
22 #define DRIVER_VERSION "30-April-2013"
24 static const char udc_name[] = "fotg210_udc";
25 static const char * const fotg210_ep_name[] = {
26 "ep0", "ep1", "ep2", "ep3", "ep4"};
28 static void fotg210_disable_fifo_int(struct fotg210_ep *ep)
30 u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1);
33 value |= DMISGR1_MF_IN_INT(ep->epnum - 1);
35 value |= DMISGR1_MF_OUTSPK_INT(ep->epnum - 1);
36 iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1);
39 static void fotg210_enable_fifo_int(struct fotg210_ep *ep)
41 u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1);
44 value &= ~DMISGR1_MF_IN_INT(ep->epnum - 1);
46 value &= ~DMISGR1_MF_OUTSPK_INT(ep->epnum - 1);
47 iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1);
50 static void fotg210_set_cxdone(struct fotg210_udc *fotg210)
52 u32 value = ioread32(fotg210->reg + FOTG210_DCFESR);
54 value |= DCFESR_CX_DONE;
55 iowrite32(value, fotg210->reg + FOTG210_DCFESR);
58 static void fotg210_done(struct fotg210_ep *ep, struct fotg210_request *req,
61 list_del_init(&req->queue);
63 /* don't modify queue heads during completion callback */
64 if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN)
65 req->req.status = -ESHUTDOWN;
67 req->req.status = status;
69 spin_unlock(&ep->fotg210->lock);
70 usb_gadget_giveback_request(&ep->ep, &req->req);
71 spin_lock(&ep->fotg210->lock);
74 if (list_empty(&ep->queue))
75 fotg210_disable_fifo_int(ep);
77 fotg210_set_cxdone(ep->fotg210);
81 static void fotg210_fifo_ep_mapping(struct fotg210_ep *ep, u32 epnum,
84 struct fotg210_udc *fotg210 = ep->fotg210;
87 /* Driver should map an ep to a fifo and then map the fifo
88 * to the ep. What a brain-damaged design!
91 /* map a fifo to an ep */
92 val = ioread32(fotg210->reg + FOTG210_EPMAP);
93 val &= ~EPMAP_FIFONOMSK(epnum, dir_in);
94 val |= EPMAP_FIFONO(epnum, dir_in);
95 iowrite32(val, fotg210->reg + FOTG210_EPMAP);
97 /* map the ep to the fifo */
98 val = ioread32(fotg210->reg + FOTG210_FIFOMAP);
99 val &= ~FIFOMAP_EPNOMSK(epnum);
100 val |= FIFOMAP_EPNO(epnum);
101 iowrite32(val, fotg210->reg + FOTG210_FIFOMAP);
104 val = ioread32(fotg210->reg + FOTG210_FIFOCF);
105 val |= FIFOCF_FIFO_EN(epnum - 1);
106 iowrite32(val, fotg210->reg + FOTG210_FIFOCF);
109 static void fotg210_set_fifo_dir(struct fotg210_ep *ep, u32 epnum, u32 dir_in)
111 struct fotg210_udc *fotg210 = ep->fotg210;
114 val = ioread32(fotg210->reg + FOTG210_FIFOMAP);
115 val |= (dir_in ? FIFOMAP_DIRIN(epnum - 1) : FIFOMAP_DIROUT(epnum - 1));
116 iowrite32(val, fotg210->reg + FOTG210_FIFOMAP);
119 static void fotg210_set_tfrtype(struct fotg210_ep *ep, u32 epnum, u32 type)
121 struct fotg210_udc *fotg210 = ep->fotg210;
124 val = ioread32(fotg210->reg + FOTG210_FIFOCF);
125 val |= FIFOCF_TYPE(type, epnum - 1);
126 iowrite32(val, fotg210->reg + FOTG210_FIFOCF);
129 static void fotg210_set_mps(struct fotg210_ep *ep, u32 epnum, u32 mps,
132 struct fotg210_udc *fotg210 = ep->fotg210;
134 u32 offset = dir_in ? FOTG210_INEPMPSR(epnum) :
135 FOTG210_OUTEPMPSR(epnum);
137 val = ioread32(fotg210->reg + offset);
138 val |= INOUTEPMPSR_MPS(mps);
139 iowrite32(val, fotg210->reg + offset);
142 static int fotg210_config_ep(struct fotg210_ep *ep,
143 const struct usb_endpoint_descriptor *desc)
145 struct fotg210_udc *fotg210 = ep->fotg210;
147 fotg210_set_fifo_dir(ep, ep->epnum, ep->dir_in);
148 fotg210_set_tfrtype(ep, ep->epnum, ep->type);
149 fotg210_set_mps(ep, ep->epnum, ep->ep.maxpacket, ep->dir_in);
150 fotg210_fifo_ep_mapping(ep, ep->epnum, ep->dir_in);
152 fotg210->ep[ep->epnum] = ep;
157 static int fotg210_ep_enable(struct usb_ep *_ep,
158 const struct usb_endpoint_descriptor *desc)
160 struct fotg210_ep *ep;
162 ep = container_of(_ep, struct fotg210_ep, ep);
165 ep->epnum = usb_endpoint_num(desc);
166 ep->type = usb_endpoint_type(desc);
167 ep->dir_in = usb_endpoint_dir_in(desc);
168 ep->ep.maxpacket = usb_endpoint_maxp(desc);
170 return fotg210_config_ep(ep, desc);
173 static void fotg210_reset_tseq(struct fotg210_udc *fotg210, u8 epnum)
175 struct fotg210_ep *ep = fotg210->ep[epnum];
180 fotg210->reg + FOTG210_INEPMPSR(epnum) :
181 fotg210->reg + FOTG210_OUTEPMPSR(epnum);
183 /* Note: Driver needs to set and clear INOUTEPMPSR_RESET_TSEQ
184 * bit. Controller wouldn't clear this bit. WTF!!!
187 value = ioread32(reg);
188 value |= INOUTEPMPSR_RESET_TSEQ;
189 iowrite32(value, reg);
191 value = ioread32(reg);
192 value &= ~INOUTEPMPSR_RESET_TSEQ;
193 iowrite32(value, reg);
196 static int fotg210_ep_release(struct fotg210_ep *ep)
204 fotg210_reset_tseq(ep->fotg210, ep->epnum);
209 static int fotg210_ep_disable(struct usb_ep *_ep)
211 struct fotg210_ep *ep;
212 struct fotg210_request *req;
217 ep = container_of(_ep, struct fotg210_ep, ep);
219 while (!list_empty(&ep->queue)) {
220 req = list_entry(ep->queue.next,
221 struct fotg210_request, queue);
222 spin_lock_irqsave(&ep->fotg210->lock, flags);
223 fotg210_done(ep, req, -ECONNRESET);
224 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
227 return fotg210_ep_release(ep);
230 static struct usb_request *fotg210_ep_alloc_request(struct usb_ep *_ep,
233 struct fotg210_request *req;
235 req = kzalloc(sizeof(struct fotg210_request), gfp_flags);
239 INIT_LIST_HEAD(&req->queue);
244 static void fotg210_ep_free_request(struct usb_ep *_ep,
245 struct usb_request *_req)
247 struct fotg210_request *req;
249 req = container_of(_req, struct fotg210_request, req);
253 static void fotg210_enable_dma(struct fotg210_ep *ep,
254 dma_addr_t d, u32 len)
257 struct fotg210_udc *fotg210 = ep->fotg210;
259 /* set transfer length and direction */
260 value = ioread32(fotg210->reg + FOTG210_DMACPSR1);
261 value &= ~(DMACPSR1_DMA_LEN(0xFFFF) | DMACPSR1_DMA_TYPE(1));
262 value |= DMACPSR1_DMA_LEN(len) | DMACPSR1_DMA_TYPE(ep->dir_in);
263 iowrite32(value, fotg210->reg + FOTG210_DMACPSR1);
265 /* set device DMA target FIFO number */
266 value = ioread32(fotg210->reg + FOTG210_DMATFNR);
268 value |= DMATFNR_ACC_FN(ep->epnum - 1);
270 value |= DMATFNR_ACC_CXF;
271 iowrite32(value, fotg210->reg + FOTG210_DMATFNR);
273 /* set DMA memory address */
274 iowrite32(d, fotg210->reg + FOTG210_DMACPSR2);
276 /* enable MDMA_EROR and MDMA_CMPLT interrupt */
277 value = ioread32(fotg210->reg + FOTG210_DMISGR2);
278 value &= ~(DMISGR2_MDMA_CMPLT | DMISGR2_MDMA_ERROR);
279 iowrite32(value, fotg210->reg + FOTG210_DMISGR2);
282 value = ioread32(fotg210->reg + FOTG210_DMACPSR1);
283 value |= DMACPSR1_DMA_START;
284 iowrite32(value, fotg210->reg + FOTG210_DMACPSR1);
287 static void fotg210_disable_dma(struct fotg210_ep *ep)
289 iowrite32(DMATFNR_DISDMA, ep->fotg210->reg + FOTG210_DMATFNR);
292 static void fotg210_wait_dma_done(struct fotg210_ep *ep)
297 value = ioread32(ep->fotg210->reg + FOTG210_DISGR2);
298 if ((value & DISGR2_USBRST_INT) ||
299 (value & DISGR2_DMA_ERROR))
301 } while (!(value & DISGR2_DMA_CMPLT));
303 value &= ~DISGR2_DMA_CMPLT;
304 iowrite32(value, ep->fotg210->reg + FOTG210_DISGR2);
308 value = ioread32(ep->fotg210->reg + FOTG210_DMACPSR1);
309 value |= DMACPSR1_DMA_ABORT;
310 iowrite32(value, ep->fotg210->reg + FOTG210_DMACPSR1);
314 value = ioread32(ep->fotg210->reg +
315 FOTG210_FIBCR(ep->epnum - 1));
316 value |= FIBCR_FFRST;
317 iowrite32(value, ep->fotg210->reg +
318 FOTG210_FIBCR(ep->epnum - 1));
320 value = ioread32(ep->fotg210->reg + FOTG210_DCFESR);
321 value |= DCFESR_CX_CLR;
322 iowrite32(value, ep->fotg210->reg + FOTG210_DCFESR);
326 static void fotg210_start_dma(struct fotg210_ep *ep,
327 struct fotg210_request *req)
329 struct device *dev = &ep->fotg210->gadget.dev;
336 buffer = req->req.buf;
337 length = req->req.length;
339 buffer = req->req.buf + req->req.actual;
340 length = ioread32(ep->fotg210->reg +
341 FOTG210_FIBCR(ep->epnum - 1)) & FIBCR_BCFX;
342 if (length > req->req.length - req->req.actual)
343 length = req->req.length - req->req.actual;
346 buffer = req->req.buf + req->req.actual;
347 if (req->req.length - req->req.actual > ep->ep.maxpacket)
348 length = ep->ep.maxpacket;
350 length = req->req.length - req->req.actual;
353 d = dma_map_single(dev, buffer, length,
354 ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
356 if (dma_mapping_error(dev, d)) {
357 pr_err("dma_mapping_error\n");
361 fotg210_enable_dma(ep, d, length);
363 /* check if dma is done */
364 fotg210_wait_dma_done(ep);
366 fotg210_disable_dma(ep);
368 /* update actual transfer length */
369 req->req.actual += length;
371 dma_unmap_single(dev, d, length, DMA_TO_DEVICE);
374 static void fotg210_ep0_queue(struct fotg210_ep *ep,
375 struct fotg210_request *req)
377 if (!req->req.length) {
378 fotg210_done(ep, req, 0);
381 if (ep->dir_in) { /* if IN */
382 fotg210_start_dma(ep, req);
383 if (req->req.length == req->req.actual)
384 fotg210_done(ep, req, 0);
386 u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR0);
388 value &= ~DMISGR0_MCX_OUT_INT;
389 iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR0);
393 static int fotg210_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
396 struct fotg210_ep *ep;
397 struct fotg210_request *req;
401 ep = container_of(_ep, struct fotg210_ep, ep);
402 req = container_of(_req, struct fotg210_request, req);
404 if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN)
407 spin_lock_irqsave(&ep->fotg210->lock, flags);
409 if (list_empty(&ep->queue))
412 list_add_tail(&req->queue, &ep->queue);
415 req->req.status = -EINPROGRESS;
417 if (!ep->epnum) /* ep0 */
418 fotg210_ep0_queue(ep, req);
419 else if (request && !ep->stall)
420 fotg210_enable_fifo_int(ep);
422 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
427 static int fotg210_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
429 struct fotg210_ep *ep;
430 struct fotg210_request *req;
433 ep = container_of(_ep, struct fotg210_ep, ep);
434 req = container_of(_req, struct fotg210_request, req);
436 spin_lock_irqsave(&ep->fotg210->lock, flags);
437 if (!list_empty(&ep->queue))
438 fotg210_done(ep, req, -ECONNRESET);
439 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
444 static void fotg210_set_epnstall(struct fotg210_ep *ep)
446 struct fotg210_udc *fotg210 = ep->fotg210;
450 /* check if IN FIFO is empty before stall */
453 value = ioread32(fotg210->reg + FOTG210_DCFESR);
454 } while (!(value & DCFESR_FIFO_EMPTY(ep->epnum - 1)));
458 fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
459 fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
460 value = ioread32(reg);
461 value |= INOUTEPMPSR_STL_EP;
462 iowrite32(value, reg);
465 static void fotg210_clear_epnstall(struct fotg210_ep *ep)
467 struct fotg210_udc *fotg210 = ep->fotg210;
472 fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
473 fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
474 value = ioread32(reg);
475 value &= ~INOUTEPMPSR_STL_EP;
476 iowrite32(value, reg);
479 static int fotg210_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge)
481 struct fotg210_ep *ep;
482 struct fotg210_udc *fotg210;
485 ep = container_of(_ep, struct fotg210_ep, ep);
487 fotg210 = ep->fotg210;
489 spin_lock_irqsave(&ep->fotg210->lock, flags);
492 fotg210_set_epnstall(ep);
497 fotg210_reset_tseq(fotg210, ep->epnum);
498 fotg210_clear_epnstall(ep);
501 if (!list_empty(&ep->queue))
502 fotg210_enable_fifo_int(ep);
505 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
509 static int fotg210_ep_set_halt(struct usb_ep *_ep, int value)
511 return fotg210_set_halt_and_wedge(_ep, value, 0);
514 static int fotg210_ep_set_wedge(struct usb_ep *_ep)
516 return fotg210_set_halt_and_wedge(_ep, 1, 1);
519 static void fotg210_ep_fifo_flush(struct usb_ep *_ep)
523 static const struct usb_ep_ops fotg210_ep_ops = {
524 .enable = fotg210_ep_enable,
525 .disable = fotg210_ep_disable,
527 .alloc_request = fotg210_ep_alloc_request,
528 .free_request = fotg210_ep_free_request,
530 .queue = fotg210_ep_queue,
531 .dequeue = fotg210_ep_dequeue,
533 .set_halt = fotg210_ep_set_halt,
534 .fifo_flush = fotg210_ep_fifo_flush,
535 .set_wedge = fotg210_ep_set_wedge,
538 static void fotg210_clear_tx0byte(struct fotg210_udc *fotg210)
540 u32 value = ioread32(fotg210->reg + FOTG210_TX0BYTE);
542 value &= ~(TX0BYTE_EP1 | TX0BYTE_EP2 | TX0BYTE_EP3
544 iowrite32(value, fotg210->reg + FOTG210_TX0BYTE);
547 static void fotg210_clear_rx0byte(struct fotg210_udc *fotg210)
549 u32 value = ioread32(fotg210->reg + FOTG210_RX0BYTE);
551 value &= ~(RX0BYTE_EP1 | RX0BYTE_EP2 | RX0BYTE_EP3
553 iowrite32(value, fotg210->reg + FOTG210_RX0BYTE);
556 /* read 8-byte setup packet only */
557 static void fotg210_rdsetupp(struct fotg210_udc *fotg210,
565 iowrite32(DMATFNR_ACC_CXF, fotg210->reg + FOTG210_DMATFNR);
567 for (i = (length >> 2); i > 0; i--) {
568 data = ioread32(fotg210->reg + FOTG210_CXPORT);
570 *(tmp + 1) = (data >> 8) & 0xFF;
571 *(tmp + 2) = (data >> 16) & 0xFF;
572 *(tmp + 3) = (data >> 24) & 0xFF;
576 switch (length % 4) {
578 data = ioread32(fotg210->reg + FOTG210_CXPORT);
582 data = ioread32(fotg210->reg + FOTG210_CXPORT);
584 *(tmp + 1) = (data >> 8) & 0xFF;
587 data = ioread32(fotg210->reg + FOTG210_CXPORT);
589 *(tmp + 1) = (data >> 8) & 0xFF;
590 *(tmp + 2) = (data >> 16) & 0xFF;
596 iowrite32(DMATFNR_DISDMA, fotg210->reg + FOTG210_DMATFNR);
599 static void fotg210_set_configuration(struct fotg210_udc *fotg210)
601 u32 value = ioread32(fotg210->reg + FOTG210_DAR);
603 value |= DAR_AFT_CONF;
604 iowrite32(value, fotg210->reg + FOTG210_DAR);
607 static void fotg210_set_dev_addr(struct fotg210_udc *fotg210, u32 addr)
609 u32 value = ioread32(fotg210->reg + FOTG210_DAR);
611 value |= (addr & 0x7F);
612 iowrite32(value, fotg210->reg + FOTG210_DAR);
615 static void fotg210_set_cxstall(struct fotg210_udc *fotg210)
617 u32 value = ioread32(fotg210->reg + FOTG210_DCFESR);
619 value |= DCFESR_CX_STL;
620 iowrite32(value, fotg210->reg + FOTG210_DCFESR);
623 static void fotg210_request_error(struct fotg210_udc *fotg210)
625 fotg210_set_cxstall(fotg210);
626 pr_err("request error!!\n");
629 static void fotg210_set_address(struct fotg210_udc *fotg210,
630 struct usb_ctrlrequest *ctrl)
632 if (ctrl->wValue >= 0x0100) {
633 fotg210_request_error(fotg210);
635 fotg210_set_dev_addr(fotg210, ctrl->wValue);
636 fotg210_set_cxdone(fotg210);
640 static void fotg210_set_feature(struct fotg210_udc *fotg210,
641 struct usb_ctrlrequest *ctrl)
643 switch (ctrl->bRequestType & USB_RECIP_MASK) {
644 case USB_RECIP_DEVICE:
645 fotg210_set_cxdone(fotg210);
647 case USB_RECIP_INTERFACE:
648 fotg210_set_cxdone(fotg210);
650 case USB_RECIP_ENDPOINT: {
652 epnum = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
654 fotg210_set_epnstall(fotg210->ep[epnum]);
656 fotg210_set_cxstall(fotg210);
657 fotg210_set_cxdone(fotg210);
661 fotg210_request_error(fotg210);
666 static void fotg210_clear_feature(struct fotg210_udc *fotg210,
667 struct usb_ctrlrequest *ctrl)
669 struct fotg210_ep *ep =
670 fotg210->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK];
672 switch (ctrl->bRequestType & USB_RECIP_MASK) {
673 case USB_RECIP_DEVICE:
674 fotg210_set_cxdone(fotg210);
676 case USB_RECIP_INTERFACE:
677 fotg210_set_cxdone(fotg210);
679 case USB_RECIP_ENDPOINT:
680 if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) {
682 fotg210_set_cxdone(fotg210);
686 fotg210_set_halt_and_wedge(&ep->ep, 0, 0);
688 fotg210_set_cxdone(fotg210);
691 fotg210_request_error(fotg210);
696 static int fotg210_is_epnstall(struct fotg210_ep *ep)
698 struct fotg210_udc *fotg210 = ep->fotg210;
703 fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
704 fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
705 value = ioread32(reg);
706 return value & INOUTEPMPSR_STL_EP ? 1 : 0;
709 static void fotg210_get_status(struct fotg210_udc *fotg210,
710 struct usb_ctrlrequest *ctrl)
714 switch (ctrl->bRequestType & USB_RECIP_MASK) {
715 case USB_RECIP_DEVICE:
716 fotg210->ep0_data = 1 << USB_DEVICE_SELF_POWERED;
718 case USB_RECIP_INTERFACE:
719 fotg210->ep0_data = 0;
721 case USB_RECIP_ENDPOINT:
722 epnum = ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK;
725 fotg210_is_epnstall(fotg210->ep[epnum])
726 << USB_ENDPOINT_HALT;
728 fotg210_request_error(fotg210);
732 fotg210_request_error(fotg210);
736 fotg210->ep0_req->buf = &fotg210->ep0_data;
737 fotg210->ep0_req->length = 2;
739 spin_unlock(&fotg210->lock);
740 fotg210_ep_queue(fotg210->gadget.ep0, fotg210->ep0_req, GFP_ATOMIC);
741 spin_lock(&fotg210->lock);
744 static int fotg210_setup_packet(struct fotg210_udc *fotg210,
745 struct usb_ctrlrequest *ctrl)
750 fotg210_rdsetupp(fotg210, p);
752 fotg210->ep[0]->dir_in = ctrl->bRequestType & USB_DIR_IN;
754 if (fotg210->gadget.speed == USB_SPEED_UNKNOWN) {
755 u32 value = ioread32(fotg210->reg + FOTG210_DMCR);
756 fotg210->gadget.speed = value & DMCR_HS_EN ?
757 USB_SPEED_HIGH : USB_SPEED_FULL;
761 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
762 switch (ctrl->bRequest) {
763 case USB_REQ_GET_STATUS:
764 fotg210_get_status(fotg210, ctrl);
766 case USB_REQ_CLEAR_FEATURE:
767 fotg210_clear_feature(fotg210, ctrl);
769 case USB_REQ_SET_FEATURE:
770 fotg210_set_feature(fotg210, ctrl);
772 case USB_REQ_SET_ADDRESS:
773 fotg210_set_address(fotg210, ctrl);
775 case USB_REQ_SET_CONFIGURATION:
776 fotg210_set_configuration(fotg210);
790 static void fotg210_ep0out(struct fotg210_udc *fotg210)
792 struct fotg210_ep *ep = fotg210->ep[0];
794 if (!list_empty(&ep->queue) && !ep->dir_in) {
795 struct fotg210_request *req;
797 req = list_first_entry(&ep->queue,
798 struct fotg210_request, queue);
801 fotg210_start_dma(ep, req);
803 if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
804 fotg210_done(ep, req, 0);
806 pr_err("%s : empty queue\n", __func__);
810 static void fotg210_ep0in(struct fotg210_udc *fotg210)
812 struct fotg210_ep *ep = fotg210->ep[0];
814 if ((!list_empty(&ep->queue)) && (ep->dir_in)) {
815 struct fotg210_request *req;
817 req = list_entry(ep->queue.next,
818 struct fotg210_request, queue);
821 fotg210_start_dma(ep, req);
823 if (req->req.actual == req->req.length)
824 fotg210_done(ep, req, 0);
826 fotg210_set_cxdone(fotg210);
830 static void fotg210_clear_comabt_int(struct fotg210_udc *fotg210)
832 u32 value = ioread32(fotg210->reg + FOTG210_DISGR0);
834 value &= ~DISGR0_CX_COMABT_INT;
835 iowrite32(value, fotg210->reg + FOTG210_DISGR0);
838 static void fotg210_in_fifo_handler(struct fotg210_ep *ep)
840 struct fotg210_request *req = list_entry(ep->queue.next,
841 struct fotg210_request, queue);
844 fotg210_start_dma(ep, req);
845 fotg210_done(ep, req, 0);
848 static void fotg210_out_fifo_handler(struct fotg210_ep *ep)
850 struct fotg210_request *req = list_entry(ep->queue.next,
851 struct fotg210_request, queue);
852 int disgr1 = ioread32(ep->fotg210->reg + FOTG210_DISGR1);
854 fotg210_start_dma(ep, req);
856 /* Complete the request when it's full or a short packet arrived.
857 * Like other drivers, short_not_ok isn't handled.
860 if (req->req.length == req->req.actual ||
861 (disgr1 & DISGR1_SPK_INT(ep->epnum - 1)))
862 fotg210_done(ep, req, 0);
865 static irqreturn_t fotg210_irq(int irq, void *_fotg210)
867 struct fotg210_udc *fotg210 = _fotg210;
868 u32 int_grp = ioread32(fotg210->reg + FOTG210_DIGR);
869 u32 int_msk = ioread32(fotg210->reg + FOTG210_DMIGR);
873 spin_lock(&fotg210->lock);
875 if (int_grp & DIGR_INT_G2) {
876 void __iomem *reg = fotg210->reg + FOTG210_DISGR2;
877 u32 int_grp2 = ioread32(reg);
878 u32 int_msk2 = ioread32(fotg210->reg + FOTG210_DMISGR2);
881 int_grp2 &= ~int_msk2;
883 if (int_grp2 & DISGR2_USBRST_INT) {
884 value = ioread32(reg);
885 value &= ~DISGR2_USBRST_INT;
886 iowrite32(value, reg);
887 pr_info("fotg210 udc reset\n");
889 if (int_grp2 & DISGR2_SUSP_INT) {
890 value = ioread32(reg);
891 value &= ~DISGR2_SUSP_INT;
892 iowrite32(value, reg);
893 pr_info("fotg210 udc suspend\n");
895 if (int_grp2 & DISGR2_RESM_INT) {
896 value = ioread32(reg);
897 value &= ~DISGR2_RESM_INT;
898 iowrite32(value, reg);
899 pr_info("fotg210 udc resume\n");
901 if (int_grp2 & DISGR2_ISO_SEQ_ERR_INT) {
902 value = ioread32(reg);
903 value &= ~DISGR2_ISO_SEQ_ERR_INT;
904 iowrite32(value, reg);
905 pr_info("fotg210 iso sequence error\n");
907 if (int_grp2 & DISGR2_ISO_SEQ_ABORT_INT) {
908 value = ioread32(reg);
909 value &= ~DISGR2_ISO_SEQ_ABORT_INT;
910 iowrite32(value, reg);
911 pr_info("fotg210 iso sequence abort\n");
913 if (int_grp2 & DISGR2_TX0BYTE_INT) {
914 fotg210_clear_tx0byte(fotg210);
915 value = ioread32(reg);
916 value &= ~DISGR2_TX0BYTE_INT;
917 iowrite32(value, reg);
918 pr_info("fotg210 transferred 0 byte\n");
920 if (int_grp2 & DISGR2_RX0BYTE_INT) {
921 fotg210_clear_rx0byte(fotg210);
922 value = ioread32(reg);
923 value &= ~DISGR2_RX0BYTE_INT;
924 iowrite32(value, reg);
925 pr_info("fotg210 received 0 byte\n");
927 if (int_grp2 & DISGR2_DMA_ERROR) {
928 value = ioread32(reg);
929 value &= ~DISGR2_DMA_ERROR;
930 iowrite32(value, reg);
934 if (int_grp & DIGR_INT_G0) {
935 void __iomem *reg = fotg210->reg + FOTG210_DISGR0;
936 u32 int_grp0 = ioread32(reg);
937 u32 int_msk0 = ioread32(fotg210->reg + FOTG210_DMISGR0);
938 struct usb_ctrlrequest ctrl;
940 int_grp0 &= ~int_msk0;
942 /* the highest priority in this source register */
943 if (int_grp0 & DISGR0_CX_COMABT_INT) {
944 fotg210_clear_comabt_int(fotg210);
945 pr_info("fotg210 CX command abort\n");
948 if (int_grp0 & DISGR0_CX_SETUP_INT) {
949 if (fotg210_setup_packet(fotg210, &ctrl)) {
950 spin_unlock(&fotg210->lock);
951 if (fotg210->driver->setup(&fotg210->gadget,
953 fotg210_set_cxstall(fotg210);
954 spin_lock(&fotg210->lock);
957 if (int_grp0 & DISGR0_CX_COMEND_INT)
958 pr_info("fotg210 cmd end\n");
960 if (int_grp0 & DISGR0_CX_IN_INT)
961 fotg210_ep0in(fotg210);
963 if (int_grp0 & DISGR0_CX_OUT_INT)
964 fotg210_ep0out(fotg210);
966 if (int_grp0 & DISGR0_CX_COMFAIL_INT) {
967 fotg210_set_cxstall(fotg210);
968 pr_info("fotg210 ep0 fail\n");
972 if (int_grp & DIGR_INT_G1) {
973 void __iomem *reg = fotg210->reg + FOTG210_DISGR1;
974 u32 int_grp1 = ioread32(reg);
975 u32 int_msk1 = ioread32(fotg210->reg + FOTG210_DMISGR1);
978 int_grp1 &= ~int_msk1;
980 for (fifo = 0; fifo < FOTG210_MAX_FIFO_NUM; fifo++) {
981 if (int_grp1 & DISGR1_IN_INT(fifo))
982 fotg210_in_fifo_handler(fotg210->ep[fifo + 1]);
984 if ((int_grp1 & DISGR1_OUT_INT(fifo)) ||
985 (int_grp1 & DISGR1_SPK_INT(fifo)))
986 fotg210_out_fifo_handler(fotg210->ep[fifo + 1]);
990 spin_unlock(&fotg210->lock);
995 static void fotg210_disable_unplug(struct fotg210_udc *fotg210)
997 u32 reg = ioread32(fotg210->reg + FOTG210_PHYTMSR);
999 reg &= ~PHYTMSR_UNPLUG;
1000 iowrite32(reg, fotg210->reg + FOTG210_PHYTMSR);
1003 static int fotg210_udc_start(struct usb_gadget *g,
1004 struct usb_gadget_driver *driver)
1006 struct fotg210_udc *fotg210 = gadget_to_fotg210(g);
1009 /* hook up the driver */
1010 driver->driver.bus = NULL;
1011 fotg210->driver = driver;
1013 /* enable device global interrupt */
1014 value = ioread32(fotg210->reg + FOTG210_DMCR);
1015 value |= DMCR_GLINT_EN;
1016 iowrite32(value, fotg210->reg + FOTG210_DMCR);
1021 static void fotg210_init(struct fotg210_udc *fotg210)
1025 /* disable global interrupt and set int polarity to active high */
1026 iowrite32(GMIR_MHC_INT | GMIR_MOTG_INT | GMIR_INT_POLARITY,
1027 fotg210->reg + FOTG210_GMIR);
1029 /* disable device global interrupt */
1030 value = ioread32(fotg210->reg + FOTG210_DMCR);
1031 value &= ~DMCR_GLINT_EN;
1032 iowrite32(value, fotg210->reg + FOTG210_DMCR);
1034 /* enable only grp2 irqs we handle */
1035 iowrite32(~(DISGR2_DMA_ERROR | DISGR2_RX0BYTE_INT | DISGR2_TX0BYTE_INT
1036 | DISGR2_ISO_SEQ_ABORT_INT | DISGR2_ISO_SEQ_ERR_INT
1037 | DISGR2_RESM_INT | DISGR2_SUSP_INT | DISGR2_USBRST_INT),
1038 fotg210->reg + FOTG210_DMISGR2);
1040 /* disable all fifo interrupt */
1041 iowrite32(~(u32)0, fotg210->reg + FOTG210_DMISGR1);
1043 /* disable cmd end */
1044 value = ioread32(fotg210->reg + FOTG210_DMISGR0);
1045 value |= DMISGR0_MCX_COMEND;
1046 iowrite32(value, fotg210->reg + FOTG210_DMISGR0);
1049 static int fotg210_udc_stop(struct usb_gadget *g)
1051 struct fotg210_udc *fotg210 = gadget_to_fotg210(g);
1052 unsigned long flags;
1054 spin_lock_irqsave(&fotg210->lock, flags);
1056 fotg210_init(fotg210);
1057 fotg210->driver = NULL;
1059 spin_unlock_irqrestore(&fotg210->lock, flags);
1064 static const struct usb_gadget_ops fotg210_gadget_ops = {
1065 .udc_start = fotg210_udc_start,
1066 .udc_stop = fotg210_udc_stop,
1069 static int fotg210_udc_remove(struct platform_device *pdev)
1071 struct fotg210_udc *fotg210 = platform_get_drvdata(pdev);
1074 usb_del_gadget_udc(&fotg210->gadget);
1075 iounmap(fotg210->reg);
1076 free_irq(platform_get_irq(pdev, 0), fotg210);
1078 fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
1079 for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
1080 kfree(fotg210->ep[i]);
1086 static int fotg210_udc_probe(struct platform_device *pdev)
1088 struct resource *res, *ires;
1089 struct fotg210_udc *fotg210 = NULL;
1090 struct fotg210_ep *_ep[FOTG210_MAX_NUM_EP];
1094 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1096 pr_err("platform_get_resource error.\n");
1100 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1102 pr_err("platform_get_resource IORESOURCE_IRQ error.\n");
1108 /* initialize udc */
1109 fotg210 = kzalloc(sizeof(struct fotg210_udc), GFP_KERNEL);
1110 if (fotg210 == NULL)
1113 for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
1114 _ep[i] = kzalloc(sizeof(struct fotg210_ep), GFP_KERNEL);
1117 fotg210->ep[i] = _ep[i];
1120 fotg210->reg = ioremap(res->start, resource_size(res));
1121 if (fotg210->reg == NULL) {
1122 pr_err("ioremap error.\n");
1126 spin_lock_init(&fotg210->lock);
1128 platform_set_drvdata(pdev, fotg210);
1130 fotg210->gadget.ops = &fotg210_gadget_ops;
1132 fotg210->gadget.max_speed = USB_SPEED_HIGH;
1133 fotg210->gadget.dev.parent = &pdev->dev;
1134 fotg210->gadget.dev.dma_mask = pdev->dev.dma_mask;
1135 fotg210->gadget.name = udc_name;
1137 INIT_LIST_HEAD(&fotg210->gadget.ep_list);
1139 for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
1140 struct fotg210_ep *ep = fotg210->ep[i];
1143 INIT_LIST_HEAD(&fotg210->ep[i]->ep.ep_list);
1144 list_add_tail(&fotg210->ep[i]->ep.ep_list,
1145 &fotg210->gadget.ep_list);
1147 ep->fotg210 = fotg210;
1148 INIT_LIST_HEAD(&ep->queue);
1149 ep->ep.name = fotg210_ep_name[i];
1150 ep->ep.ops = &fotg210_ep_ops;
1151 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
1154 ep->ep.caps.type_control = true;
1156 ep->ep.caps.type_iso = true;
1157 ep->ep.caps.type_bulk = true;
1158 ep->ep.caps.type_int = true;
1161 ep->ep.caps.dir_in = true;
1162 ep->ep.caps.dir_out = true;
1164 usb_ep_set_maxpacket_limit(&fotg210->ep[0]->ep, 0x40);
1165 fotg210->gadget.ep0 = &fotg210->ep[0]->ep;
1166 INIT_LIST_HEAD(&fotg210->gadget.ep0->ep_list);
1168 fotg210->ep0_req = fotg210_ep_alloc_request(&fotg210->ep[0]->ep,
1170 if (fotg210->ep0_req == NULL)
1173 fotg210_init(fotg210);
1175 fotg210_disable_unplug(fotg210);
1177 ret = request_irq(ires->start, fotg210_irq, IRQF_SHARED,
1180 pr_err("request_irq error (%d)\n", ret);
1184 ret = usb_add_gadget_udc(&pdev->dev, &fotg210->gadget);
1188 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1193 free_irq(ires->start, fotg210);
1196 fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
1199 iounmap(fotg210->reg);
1202 for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
1203 kfree(fotg210->ep[i]);
1210 static struct platform_driver fotg210_driver = {
1214 .probe = fotg210_udc_probe,
1215 .remove = fotg210_udc_remove,
1218 module_platform_driver(fotg210_driver);
1220 MODULE_AUTHOR("Yuan-Hsin Chen, Feng-Hsin Chiang <john453@faraday-tech.com>");
1221 MODULE_LICENSE("GPL");
1222 MODULE_DESCRIPTION(DRIVER_DESC);