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)
335 buffer = req->req.buf;
336 length = req->req.length;
338 buffer = req->req.buf + req->req.actual;
339 length = ioread32(ep->fotg210->reg +
340 FOTG210_FIBCR(ep->epnum - 1)) & FIBCR_BCFX;
341 if (length > req->req.length - req->req.actual)
342 length = req->req.length - req->req.actual;
345 buffer = req->req.buf + req->req.actual;
346 if (req->req.length - req->req.actual > ep->ep.maxpacket)
347 length = ep->ep.maxpacket;
349 length = req->req.length - req->req.actual;
352 d = dma_map_single(NULL, buffer, length,
353 ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
355 if (dma_mapping_error(NULL, d)) {
356 pr_err("dma_mapping_error\n");
360 dma_sync_single_for_device(NULL, d, length,
361 ep->dir_in ? DMA_TO_DEVICE :
364 fotg210_enable_dma(ep, d, length);
366 /* check if dma is done */
367 fotg210_wait_dma_done(ep);
369 fotg210_disable_dma(ep);
371 /* update actual transfer length */
372 req->req.actual += length;
374 dma_unmap_single(NULL, d, length, DMA_TO_DEVICE);
377 static void fotg210_ep0_queue(struct fotg210_ep *ep,
378 struct fotg210_request *req)
380 if (!req->req.length) {
381 fotg210_done(ep, req, 0);
384 if (ep->dir_in) { /* if IN */
385 fotg210_start_dma(ep, req);
386 if (req->req.length == req->req.actual)
387 fotg210_done(ep, req, 0);
389 u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR0);
391 value &= ~DMISGR0_MCX_OUT_INT;
392 iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR0);
396 static int fotg210_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
399 struct fotg210_ep *ep;
400 struct fotg210_request *req;
404 ep = container_of(_ep, struct fotg210_ep, ep);
405 req = container_of(_req, struct fotg210_request, req);
407 if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN)
410 spin_lock_irqsave(&ep->fotg210->lock, flags);
412 if (list_empty(&ep->queue))
415 list_add_tail(&req->queue, &ep->queue);
418 req->req.status = -EINPROGRESS;
420 if (!ep->epnum) /* ep0 */
421 fotg210_ep0_queue(ep, req);
422 else if (request && !ep->stall)
423 fotg210_enable_fifo_int(ep);
425 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
430 static int fotg210_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
432 struct fotg210_ep *ep;
433 struct fotg210_request *req;
436 ep = container_of(_ep, struct fotg210_ep, ep);
437 req = container_of(_req, struct fotg210_request, req);
439 spin_lock_irqsave(&ep->fotg210->lock, flags);
440 if (!list_empty(&ep->queue))
441 fotg210_done(ep, req, -ECONNRESET);
442 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
447 static void fotg210_set_epnstall(struct fotg210_ep *ep)
449 struct fotg210_udc *fotg210 = ep->fotg210;
453 /* check if IN FIFO is empty before stall */
456 value = ioread32(fotg210->reg + FOTG210_DCFESR);
457 } while (!(value & DCFESR_FIFO_EMPTY(ep->epnum - 1)));
461 fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
462 fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
463 value = ioread32(reg);
464 value |= INOUTEPMPSR_STL_EP;
465 iowrite32(value, reg);
468 static void fotg210_clear_epnstall(struct fotg210_ep *ep)
470 struct fotg210_udc *fotg210 = ep->fotg210;
475 fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
476 fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
477 value = ioread32(reg);
478 value &= ~INOUTEPMPSR_STL_EP;
479 iowrite32(value, reg);
482 static int fotg210_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge)
484 struct fotg210_ep *ep;
485 struct fotg210_udc *fotg210;
489 ep = container_of(_ep, struct fotg210_ep, ep);
491 fotg210 = ep->fotg210;
493 spin_lock_irqsave(&ep->fotg210->lock, flags);
496 fotg210_set_epnstall(ep);
501 fotg210_reset_tseq(fotg210, ep->epnum);
502 fotg210_clear_epnstall(ep);
505 if (!list_empty(&ep->queue))
506 fotg210_enable_fifo_int(ep);
509 spin_unlock_irqrestore(&ep->fotg210->lock, flags);
513 static int fotg210_ep_set_halt(struct usb_ep *_ep, int value)
515 return fotg210_set_halt_and_wedge(_ep, value, 0);
518 static int fotg210_ep_set_wedge(struct usb_ep *_ep)
520 return fotg210_set_halt_and_wedge(_ep, 1, 1);
523 static void fotg210_ep_fifo_flush(struct usb_ep *_ep)
527 static const struct usb_ep_ops fotg210_ep_ops = {
528 .enable = fotg210_ep_enable,
529 .disable = fotg210_ep_disable,
531 .alloc_request = fotg210_ep_alloc_request,
532 .free_request = fotg210_ep_free_request,
534 .queue = fotg210_ep_queue,
535 .dequeue = fotg210_ep_dequeue,
537 .set_halt = fotg210_ep_set_halt,
538 .fifo_flush = fotg210_ep_fifo_flush,
539 .set_wedge = fotg210_ep_set_wedge,
542 static void fotg210_clear_tx0byte(struct fotg210_udc *fotg210)
544 u32 value = ioread32(fotg210->reg + FOTG210_TX0BYTE);
546 value &= ~(TX0BYTE_EP1 | TX0BYTE_EP2 | TX0BYTE_EP3
548 iowrite32(value, fotg210->reg + FOTG210_TX0BYTE);
551 static void fotg210_clear_rx0byte(struct fotg210_udc *fotg210)
553 u32 value = ioread32(fotg210->reg + FOTG210_RX0BYTE);
555 value &= ~(RX0BYTE_EP1 | RX0BYTE_EP2 | RX0BYTE_EP3
557 iowrite32(value, fotg210->reg + FOTG210_RX0BYTE);
560 /* read 8-byte setup packet only */
561 static void fotg210_rdsetupp(struct fotg210_udc *fotg210,
569 iowrite32(DMATFNR_ACC_CXF, fotg210->reg + FOTG210_DMATFNR);
571 for (i = (length >> 2); i > 0; i--) {
572 data = ioread32(fotg210->reg + FOTG210_CXPORT);
574 *(tmp + 1) = (data >> 8) & 0xFF;
575 *(tmp + 2) = (data >> 16) & 0xFF;
576 *(tmp + 3) = (data >> 24) & 0xFF;
580 switch (length % 4) {
582 data = ioread32(fotg210->reg + FOTG210_CXPORT);
586 data = ioread32(fotg210->reg + FOTG210_CXPORT);
588 *(tmp + 1) = (data >> 8) & 0xFF;
591 data = ioread32(fotg210->reg + FOTG210_CXPORT);
593 *(tmp + 1) = (data >> 8) & 0xFF;
594 *(tmp + 2) = (data >> 16) & 0xFF;
600 iowrite32(DMATFNR_DISDMA, fotg210->reg + FOTG210_DMATFNR);
603 static void fotg210_set_configuration(struct fotg210_udc *fotg210)
605 u32 value = ioread32(fotg210->reg + FOTG210_DAR);
607 value |= DAR_AFT_CONF;
608 iowrite32(value, fotg210->reg + FOTG210_DAR);
611 static void fotg210_set_dev_addr(struct fotg210_udc *fotg210, u32 addr)
613 u32 value = ioread32(fotg210->reg + FOTG210_DAR);
615 value |= (addr & 0x7F);
616 iowrite32(value, fotg210->reg + FOTG210_DAR);
619 static void fotg210_set_cxstall(struct fotg210_udc *fotg210)
621 u32 value = ioread32(fotg210->reg + FOTG210_DCFESR);
623 value |= DCFESR_CX_STL;
624 iowrite32(value, fotg210->reg + FOTG210_DCFESR);
627 static void fotg210_request_error(struct fotg210_udc *fotg210)
629 fotg210_set_cxstall(fotg210);
630 pr_err("request error!!\n");
633 static void fotg210_set_address(struct fotg210_udc *fotg210,
634 struct usb_ctrlrequest *ctrl)
636 if (ctrl->wValue >= 0x0100) {
637 fotg210_request_error(fotg210);
639 fotg210_set_dev_addr(fotg210, ctrl->wValue);
640 fotg210_set_cxdone(fotg210);
644 static void fotg210_set_feature(struct fotg210_udc *fotg210,
645 struct usb_ctrlrequest *ctrl)
647 switch (ctrl->bRequestType & USB_RECIP_MASK) {
648 case USB_RECIP_DEVICE:
649 fotg210_set_cxdone(fotg210);
651 case USB_RECIP_INTERFACE:
652 fotg210_set_cxdone(fotg210);
654 case USB_RECIP_ENDPOINT: {
656 epnum = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
658 fotg210_set_epnstall(fotg210->ep[epnum]);
660 fotg210_set_cxstall(fotg210);
661 fotg210_set_cxdone(fotg210);
665 fotg210_request_error(fotg210);
670 static void fotg210_clear_feature(struct fotg210_udc *fotg210,
671 struct usb_ctrlrequest *ctrl)
673 struct fotg210_ep *ep =
674 fotg210->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK];
676 switch (ctrl->bRequestType & USB_RECIP_MASK) {
677 case USB_RECIP_DEVICE:
678 fotg210_set_cxdone(fotg210);
680 case USB_RECIP_INTERFACE:
681 fotg210_set_cxdone(fotg210);
683 case USB_RECIP_ENDPOINT:
684 if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) {
686 fotg210_set_cxdone(fotg210);
690 fotg210_set_halt_and_wedge(&ep->ep, 0, 0);
692 fotg210_set_cxdone(fotg210);
695 fotg210_request_error(fotg210);
700 static int fotg210_is_epnstall(struct fotg210_ep *ep)
702 struct fotg210_udc *fotg210 = ep->fotg210;
707 fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
708 fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
709 value = ioread32(reg);
710 return value & INOUTEPMPSR_STL_EP ? 1 : 0;
713 static void fotg210_get_status(struct fotg210_udc *fotg210,
714 struct usb_ctrlrequest *ctrl)
718 switch (ctrl->bRequestType & USB_RECIP_MASK) {
719 case USB_RECIP_DEVICE:
720 fotg210->ep0_data = 1 << USB_DEVICE_SELF_POWERED;
722 case USB_RECIP_INTERFACE:
723 fotg210->ep0_data = 0;
725 case USB_RECIP_ENDPOINT:
726 epnum = ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK;
729 fotg210_is_epnstall(fotg210->ep[epnum])
730 << USB_ENDPOINT_HALT;
732 fotg210_request_error(fotg210);
736 fotg210_request_error(fotg210);
740 fotg210->ep0_req->buf = &fotg210->ep0_data;
741 fotg210->ep0_req->length = 2;
743 spin_unlock(&fotg210->lock);
744 fotg210_ep_queue(fotg210->gadget.ep0, fotg210->ep0_req, GFP_ATOMIC);
745 spin_lock(&fotg210->lock);
748 static int fotg210_setup_packet(struct fotg210_udc *fotg210,
749 struct usb_ctrlrequest *ctrl)
754 fotg210_rdsetupp(fotg210, p);
756 fotg210->ep[0]->dir_in = ctrl->bRequestType & USB_DIR_IN;
758 if (fotg210->gadget.speed == USB_SPEED_UNKNOWN) {
759 u32 value = ioread32(fotg210->reg + FOTG210_DMCR);
760 fotg210->gadget.speed = value & DMCR_HS_EN ?
761 USB_SPEED_HIGH : USB_SPEED_FULL;
765 if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
766 switch (ctrl->bRequest) {
767 case USB_REQ_GET_STATUS:
768 fotg210_get_status(fotg210, ctrl);
770 case USB_REQ_CLEAR_FEATURE:
771 fotg210_clear_feature(fotg210, ctrl);
773 case USB_REQ_SET_FEATURE:
774 fotg210_set_feature(fotg210, ctrl);
776 case USB_REQ_SET_ADDRESS:
777 fotg210_set_address(fotg210, ctrl);
779 case USB_REQ_SET_CONFIGURATION:
780 fotg210_set_configuration(fotg210);
794 static void fotg210_ep0out(struct fotg210_udc *fotg210)
796 struct fotg210_ep *ep = fotg210->ep[0];
798 if (!list_empty(&ep->queue) && !ep->dir_in) {
799 struct fotg210_request *req;
801 req = list_first_entry(&ep->queue,
802 struct fotg210_request, queue);
805 fotg210_start_dma(ep, req);
807 if ((req->req.length - req->req.actual) < ep->ep.maxpacket)
808 fotg210_done(ep, req, 0);
810 pr_err("%s : empty queue\n", __func__);
814 static void fotg210_ep0in(struct fotg210_udc *fotg210)
816 struct fotg210_ep *ep = fotg210->ep[0];
818 if ((!list_empty(&ep->queue)) && (ep->dir_in)) {
819 struct fotg210_request *req;
821 req = list_entry(ep->queue.next,
822 struct fotg210_request, queue);
825 fotg210_start_dma(ep, req);
827 if (req->req.actual == req->req.length)
828 fotg210_done(ep, req, 0);
830 fotg210_set_cxdone(fotg210);
834 static void fotg210_clear_comabt_int(struct fotg210_udc *fotg210)
836 u32 value = ioread32(fotg210->reg + FOTG210_DISGR0);
838 value &= ~DISGR0_CX_COMABT_INT;
839 iowrite32(value, fotg210->reg + FOTG210_DISGR0);
842 static void fotg210_in_fifo_handler(struct fotg210_ep *ep)
844 struct fotg210_request *req = list_entry(ep->queue.next,
845 struct fotg210_request, queue);
848 fotg210_start_dma(ep, req);
849 fotg210_done(ep, req, 0);
852 static void fotg210_out_fifo_handler(struct fotg210_ep *ep)
854 struct fotg210_request *req = list_entry(ep->queue.next,
855 struct fotg210_request, queue);
856 int disgr1 = ioread32(ep->fotg210->reg + FOTG210_DISGR1);
858 fotg210_start_dma(ep, req);
860 /* Complete the request when it's full or a short packet arrived.
861 * Like other drivers, short_not_ok isn't handled.
864 if (req->req.length == req->req.actual ||
865 (disgr1 & DISGR1_SPK_INT(ep->epnum - 1)))
866 fotg210_done(ep, req, 0);
869 static irqreturn_t fotg210_irq(int irq, void *_fotg210)
871 struct fotg210_udc *fotg210 = _fotg210;
872 u32 int_grp = ioread32(fotg210->reg + FOTG210_DIGR);
873 u32 int_msk = ioread32(fotg210->reg + FOTG210_DMIGR);
877 spin_lock(&fotg210->lock);
879 if (int_grp & DIGR_INT_G2) {
880 void __iomem *reg = fotg210->reg + FOTG210_DISGR2;
881 u32 int_grp2 = ioread32(reg);
882 u32 int_msk2 = ioread32(fotg210->reg + FOTG210_DMISGR2);
885 int_grp2 &= ~int_msk2;
887 if (int_grp2 & DISGR2_USBRST_INT) {
888 value = ioread32(reg);
889 value &= ~DISGR2_USBRST_INT;
890 iowrite32(value, reg);
891 pr_info("fotg210 udc reset\n");
893 if (int_grp2 & DISGR2_SUSP_INT) {
894 value = ioread32(reg);
895 value &= ~DISGR2_SUSP_INT;
896 iowrite32(value, reg);
897 pr_info("fotg210 udc suspend\n");
899 if (int_grp2 & DISGR2_RESM_INT) {
900 value = ioread32(reg);
901 value &= ~DISGR2_RESM_INT;
902 iowrite32(value, reg);
903 pr_info("fotg210 udc resume\n");
905 if (int_grp2 & DISGR2_ISO_SEQ_ERR_INT) {
906 value = ioread32(reg);
907 value &= ~DISGR2_ISO_SEQ_ERR_INT;
908 iowrite32(value, reg);
909 pr_info("fotg210 iso sequence error\n");
911 if (int_grp2 & DISGR2_ISO_SEQ_ABORT_INT) {
912 value = ioread32(reg);
913 value &= ~DISGR2_ISO_SEQ_ABORT_INT;
914 iowrite32(value, reg);
915 pr_info("fotg210 iso sequence abort\n");
917 if (int_grp2 & DISGR2_TX0BYTE_INT) {
918 fotg210_clear_tx0byte(fotg210);
919 value = ioread32(reg);
920 value &= ~DISGR2_TX0BYTE_INT;
921 iowrite32(value, reg);
922 pr_info("fotg210 transferred 0 byte\n");
924 if (int_grp2 & DISGR2_RX0BYTE_INT) {
925 fotg210_clear_rx0byte(fotg210);
926 value = ioread32(reg);
927 value &= ~DISGR2_RX0BYTE_INT;
928 iowrite32(value, reg);
929 pr_info("fotg210 received 0 byte\n");
931 if (int_grp2 & DISGR2_DMA_ERROR) {
932 value = ioread32(reg);
933 value &= ~DISGR2_DMA_ERROR;
934 iowrite32(value, reg);
938 if (int_grp & DIGR_INT_G0) {
939 void __iomem *reg = fotg210->reg + FOTG210_DISGR0;
940 u32 int_grp0 = ioread32(reg);
941 u32 int_msk0 = ioread32(fotg210->reg + FOTG210_DMISGR0);
942 struct usb_ctrlrequest ctrl;
944 int_grp0 &= ~int_msk0;
946 /* the highest priority in this source register */
947 if (int_grp0 & DISGR0_CX_COMABT_INT) {
948 fotg210_clear_comabt_int(fotg210);
949 pr_info("fotg210 CX command abort\n");
952 if (int_grp0 & DISGR0_CX_SETUP_INT) {
953 if (fotg210_setup_packet(fotg210, &ctrl)) {
954 spin_unlock(&fotg210->lock);
955 if (fotg210->driver->setup(&fotg210->gadget,
957 fotg210_set_cxstall(fotg210);
958 spin_lock(&fotg210->lock);
961 if (int_grp0 & DISGR0_CX_COMEND_INT)
962 pr_info("fotg210 cmd end\n");
964 if (int_grp0 & DISGR0_CX_IN_INT)
965 fotg210_ep0in(fotg210);
967 if (int_grp0 & DISGR0_CX_OUT_INT)
968 fotg210_ep0out(fotg210);
970 if (int_grp0 & DISGR0_CX_COMFAIL_INT) {
971 fotg210_set_cxstall(fotg210);
972 pr_info("fotg210 ep0 fail\n");
976 if (int_grp & DIGR_INT_G1) {
977 void __iomem *reg = fotg210->reg + FOTG210_DISGR1;
978 u32 int_grp1 = ioread32(reg);
979 u32 int_msk1 = ioread32(fotg210->reg + FOTG210_DMISGR1);
982 int_grp1 &= ~int_msk1;
984 for (fifo = 0; fifo < FOTG210_MAX_FIFO_NUM; fifo++) {
985 if (int_grp1 & DISGR1_IN_INT(fifo))
986 fotg210_in_fifo_handler(fotg210->ep[fifo + 1]);
988 if ((int_grp1 & DISGR1_OUT_INT(fifo)) ||
989 (int_grp1 & DISGR1_SPK_INT(fifo)))
990 fotg210_out_fifo_handler(fotg210->ep[fifo + 1]);
994 spin_unlock(&fotg210->lock);
999 static void fotg210_disable_unplug(struct fotg210_udc *fotg210)
1001 u32 reg = ioread32(fotg210->reg + FOTG210_PHYTMSR);
1003 reg &= ~PHYTMSR_UNPLUG;
1004 iowrite32(reg, fotg210->reg + FOTG210_PHYTMSR);
1007 static int fotg210_udc_start(struct usb_gadget *g,
1008 struct usb_gadget_driver *driver)
1010 struct fotg210_udc *fotg210 = gadget_to_fotg210(g);
1013 /* hook up the driver */
1014 driver->driver.bus = NULL;
1015 fotg210->driver = driver;
1017 /* enable device global interrupt */
1018 value = ioread32(fotg210->reg + FOTG210_DMCR);
1019 value |= DMCR_GLINT_EN;
1020 iowrite32(value, fotg210->reg + FOTG210_DMCR);
1025 static void fotg210_init(struct fotg210_udc *fotg210)
1029 /* disable global interrupt and set int polarity to active high */
1030 iowrite32(GMIR_MHC_INT | GMIR_MOTG_INT | GMIR_INT_POLARITY,
1031 fotg210->reg + FOTG210_GMIR);
1033 /* disable device global interrupt */
1034 value = ioread32(fotg210->reg + FOTG210_DMCR);
1035 value &= ~DMCR_GLINT_EN;
1036 iowrite32(value, fotg210->reg + FOTG210_DMCR);
1038 /* enable only grp2 irqs we handle */
1039 iowrite32(~(DISGR2_DMA_ERROR | DISGR2_RX0BYTE_INT | DISGR2_TX0BYTE_INT
1040 | DISGR2_ISO_SEQ_ABORT_INT | DISGR2_ISO_SEQ_ERR_INT
1041 | DISGR2_RESM_INT | DISGR2_SUSP_INT | DISGR2_USBRST_INT),
1042 fotg210->reg + FOTG210_DMISGR2);
1044 /* disable all fifo interrupt */
1045 iowrite32(~(u32)0, fotg210->reg + FOTG210_DMISGR1);
1047 /* disable cmd end */
1048 value = ioread32(fotg210->reg + FOTG210_DMISGR0);
1049 value |= DMISGR0_MCX_COMEND;
1050 iowrite32(value, fotg210->reg + FOTG210_DMISGR0);
1053 static int fotg210_udc_stop(struct usb_gadget *g)
1055 struct fotg210_udc *fotg210 = gadget_to_fotg210(g);
1056 unsigned long flags;
1058 spin_lock_irqsave(&fotg210->lock, flags);
1060 fotg210_init(fotg210);
1061 fotg210->driver = NULL;
1063 spin_unlock_irqrestore(&fotg210->lock, flags);
1068 static const struct usb_gadget_ops fotg210_gadget_ops = {
1069 .udc_start = fotg210_udc_start,
1070 .udc_stop = fotg210_udc_stop,
1073 static int fotg210_udc_remove(struct platform_device *pdev)
1075 struct fotg210_udc *fotg210 = platform_get_drvdata(pdev);
1078 usb_del_gadget_udc(&fotg210->gadget);
1079 iounmap(fotg210->reg);
1080 free_irq(platform_get_irq(pdev, 0), fotg210);
1082 fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
1083 for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
1084 kfree(fotg210->ep[i]);
1090 static int fotg210_udc_probe(struct platform_device *pdev)
1092 struct resource *res, *ires;
1093 struct fotg210_udc *fotg210 = NULL;
1094 struct fotg210_ep *_ep[FOTG210_MAX_NUM_EP];
1098 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1100 pr_err("platform_get_resource error.\n");
1104 ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1106 pr_err("platform_get_resource IORESOURCE_IRQ error.\n");
1112 /* initialize udc */
1113 fotg210 = kzalloc(sizeof(struct fotg210_udc), GFP_KERNEL);
1114 if (fotg210 == NULL)
1117 for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
1118 _ep[i] = kzalloc(sizeof(struct fotg210_ep), GFP_KERNEL);
1121 fotg210->ep[i] = _ep[i];
1124 fotg210->reg = ioremap(res->start, resource_size(res));
1125 if (fotg210->reg == NULL) {
1126 pr_err("ioremap error.\n");
1130 spin_lock_init(&fotg210->lock);
1132 platform_set_drvdata(pdev, fotg210);
1134 fotg210->gadget.ops = &fotg210_gadget_ops;
1136 fotg210->gadget.max_speed = USB_SPEED_HIGH;
1137 fotg210->gadget.dev.parent = &pdev->dev;
1138 fotg210->gadget.dev.dma_mask = pdev->dev.dma_mask;
1139 fotg210->gadget.name = udc_name;
1141 INIT_LIST_HEAD(&fotg210->gadget.ep_list);
1143 for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
1144 struct fotg210_ep *ep = fotg210->ep[i];
1147 INIT_LIST_HEAD(&fotg210->ep[i]->ep.ep_list);
1148 list_add_tail(&fotg210->ep[i]->ep.ep_list,
1149 &fotg210->gadget.ep_list);
1151 ep->fotg210 = fotg210;
1152 INIT_LIST_HEAD(&ep->queue);
1153 ep->ep.name = fotg210_ep_name[i];
1154 ep->ep.ops = &fotg210_ep_ops;
1155 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
1158 ep->ep.caps.type_control = true;
1160 ep->ep.caps.type_iso = true;
1161 ep->ep.caps.type_bulk = true;
1162 ep->ep.caps.type_int = true;
1165 ep->ep.caps.dir_in = true;
1166 ep->ep.caps.dir_out = true;
1168 usb_ep_set_maxpacket_limit(&fotg210->ep[0]->ep, 0x40);
1169 fotg210->gadget.ep0 = &fotg210->ep[0]->ep;
1170 INIT_LIST_HEAD(&fotg210->gadget.ep0->ep_list);
1172 fotg210->ep0_req = fotg210_ep_alloc_request(&fotg210->ep[0]->ep,
1174 if (fotg210->ep0_req == NULL)
1177 fotg210_init(fotg210);
1179 fotg210_disable_unplug(fotg210);
1181 ret = request_irq(ires->start, fotg210_irq, IRQF_SHARED,
1184 pr_err("request_irq error (%d)\n", ret);
1188 ret = usb_add_gadget_udc(&pdev->dev, &fotg210->gadget);
1192 dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1197 free_irq(ires->start, fotg210);
1200 fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
1203 iounmap(fotg210->reg);
1206 for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
1207 kfree(fotg210->ep[i]);
1214 static struct platform_driver fotg210_driver = {
1216 .name = (char *)udc_name,
1218 .probe = fotg210_udc_probe,
1219 .remove = fotg210_udc_remove,
1222 module_platform_driver(fotg210_driver);
1224 MODULE_AUTHOR("Yuan-Hsin Chen, Feng-Hsin Chiang <john453@faraday-tech.com>");
1225 MODULE_LICENSE("GPL");
1226 MODULE_DESCRIPTION(DRIVER_DESC);