1 // SPDX-License-Identifier: GPL-1.0+
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Copyright (C) 2019 Renesas Electronics Corporation
7 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
9 #include <linux/delay.h>
10 #include <linux/dma-mapping.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/usb/ch9.h>
15 #include <linux/usb/gadget.h>
16 #include <linux/usb/otg.h>
22 struct usbhsg_request {
23 struct usb_request req;
27 #define EP_NAME_SIZE 8
31 struct usbhs_pipe *pipe;
32 spinlock_t lock; /* protect the pipe */
34 char ep_name[EP_NAME_SIZE];
36 struct usbhsg_gpriv *gpriv;
40 struct usb_gadget gadget;
43 struct usbhsg_uep *uep;
46 struct usb_gadget_driver *driver;
47 struct usb_phy *transceiver;
51 #define USBHSG_STATUS_STARTED (1 << 0)
52 #define USBHSG_STATUS_REGISTERD (1 << 1)
53 #define USBHSG_STATUS_WEDGE (1 << 2)
54 #define USBHSG_STATUS_SELF_POWERED (1 << 3)
55 #define USBHSG_STATUS_SOFT_CONNECT (1 << 4)
58 struct usbhsg_recip_handle {
60 int (*device)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
61 struct usb_ctrlrequest *ctrl);
62 int (*interface)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
63 struct usb_ctrlrequest *ctrl);
64 int (*endpoint)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
65 struct usb_ctrlrequest *ctrl);
71 #define usbhsg_priv_to_gpriv(priv) \
73 usbhs_mod_get(priv, USBHS_GADGET), \
74 struct usbhsg_gpriv, mod)
76 #define __usbhsg_for_each_uep(start, pos, g, i) \
78 ((i) < (g)->uep_size) && ((pos) = (g)->uep + (i)); \
81 #define usbhsg_for_each_uep(pos, gpriv, i) \
82 __usbhsg_for_each_uep(1, pos, gpriv, i)
84 #define usbhsg_for_each_uep_with_dcp(pos, gpriv, i) \
85 __usbhsg_for_each_uep(0, pos, gpriv, i)
87 #define usbhsg_gadget_to_gpriv(g)\
88 container_of(g, struct usbhsg_gpriv, gadget)
90 #define usbhsg_req_to_ureq(r)\
91 container_of(r, struct usbhsg_request, req)
93 #define usbhsg_ep_to_uep(e) container_of(e, struct usbhsg_uep, ep)
94 #define usbhsg_gpriv_to_dev(gp) usbhs_priv_to_dev((gp)->mod.priv)
95 #define usbhsg_gpriv_to_priv(gp) ((gp)->mod.priv)
96 #define usbhsg_gpriv_to_dcp(gp) ((gp)->uep)
97 #define usbhsg_gpriv_to_nth_uep(gp, i) ((gp)->uep + i)
98 #define usbhsg_uep_to_gpriv(u) ((u)->gpriv)
99 #define usbhsg_uep_to_pipe(u) ((u)->pipe)
100 #define usbhsg_pipe_to_uep(p) ((p)->mod_private)
101 #define usbhsg_is_dcp(u) ((u) == usbhsg_gpriv_to_dcp((u)->gpriv))
103 #define usbhsg_ureq_to_pkt(u) (&(u)->pkt)
104 #define usbhsg_pkt_to_ureq(i) \
105 container_of(i, struct usbhsg_request, pkt)
107 #define usbhsg_is_not_connected(gp) ((gp)->gadget.speed == USB_SPEED_UNKNOWN)
110 #define usbhsg_status_init(gp) do {(gp)->status = 0; } while (0)
111 #define usbhsg_status_set(gp, b) (gp->status |= b)
112 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
113 #define usbhsg_status_has(gp, b) (gp->status & b)
118 static void __usbhsg_queue_pop(struct usbhsg_uep *uep,
119 struct usbhsg_request *ureq,
122 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
123 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
124 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
125 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
128 dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));
130 ureq->req.status = status;
131 spin_unlock(usbhs_priv_to_lock(priv));
132 usb_gadget_giveback_request(&uep->ep, &ureq->req);
133 spin_lock(usbhs_priv_to_lock(priv));
136 static void usbhsg_queue_pop(struct usbhsg_uep *uep,
137 struct usbhsg_request *ureq,
140 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
141 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
144 usbhs_lock(priv, flags);
145 __usbhsg_queue_pop(uep, ureq, status);
146 usbhs_unlock(priv, flags);
149 static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
151 struct usbhs_pipe *pipe = pkt->pipe;
152 struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
153 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
156 ureq->req.actual = pkt->actual;
158 usbhs_lock(priv, flags);
160 __usbhsg_queue_pop(uep, ureq, 0);
161 usbhs_unlock(priv, flags);
164 static void usbhsg_queue_push(struct usbhsg_uep *uep,
165 struct usbhsg_request *ureq)
167 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
168 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
169 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
170 struct usbhs_pkt *pkt = usbhsg_ureq_to_pkt(ureq);
171 struct usb_request *req = &ureq->req;
174 req->status = -EINPROGRESS;
175 usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
176 req->buf, req->length, req->zero, -1);
177 usbhs_pkt_start(pipe);
179 dev_dbg(dev, "pipe %d : queue push (%d)\n",
180 usbhs_pipe_number(pipe),
187 static int usbhsg_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
190 struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
191 struct usb_request *req = &ureq->req;
192 struct usbhs_pipe *pipe = pkt->pipe;
193 enum dma_data_direction dir;
196 dir = usbhs_pipe_is_dir_host(pipe);
199 /* it can not use scatter/gather */
200 WARN_ON(req->num_sgs);
202 ret = usb_gadget_map_request_by_dev(dma_dev, req, dir);
208 usb_gadget_unmap_request_by_dev(dma_dev, req, dir);
215 * USB_TYPE_STANDARD / clear feature functions
217 static int usbhsg_recip_handler_std_control_done(struct usbhs_priv *priv,
218 struct usbhsg_uep *uep,
219 struct usb_ctrlrequest *ctrl)
221 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
222 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
223 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
225 usbhs_dcp_control_transfer_done(pipe);
230 static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
231 struct usbhsg_uep *uep,
232 struct usb_ctrlrequest *ctrl)
234 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
235 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
237 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_WEDGE)) {
238 usbhs_pipe_disable(pipe);
239 usbhs_pipe_sequence_data0(pipe);
240 usbhs_pipe_enable(pipe);
243 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
245 usbhs_pkt_start(pipe);
250 static struct usbhsg_recip_handle req_clear_feature = {
251 .name = "clear feature",
252 .device = usbhsg_recip_handler_std_control_done,
253 .interface = usbhsg_recip_handler_std_control_done,
254 .endpoint = usbhsg_recip_handler_std_clear_endpoint,
258 * USB_TYPE_STANDARD / set feature functions
260 static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
261 struct usbhsg_uep *uep,
262 struct usb_ctrlrequest *ctrl)
264 switch (le16_to_cpu(ctrl->wValue)) {
265 case USB_DEVICE_TEST_MODE:
266 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
268 usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
271 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
278 static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
279 struct usbhsg_uep *uep,
280 struct usb_ctrlrequest *ctrl)
282 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
284 usbhs_pipe_stall(pipe);
286 usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
291 static struct usbhsg_recip_handle req_set_feature = {
292 .name = "set feature",
293 .device = usbhsg_recip_handler_std_set_device,
294 .interface = usbhsg_recip_handler_std_control_done,
295 .endpoint = usbhsg_recip_handler_std_set_endpoint,
299 * USB_TYPE_STANDARD / get status functions
301 static void __usbhsg_recip_send_complete(struct usb_ep *ep,
302 struct usb_request *req)
304 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
306 /* free allocated recip-buffer/usb_request */
307 kfree(ureq->pkt.buf);
308 usb_ep_free_request(ep, req);
311 static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
312 unsigned short status)
314 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
315 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
316 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
317 struct usb_request *req;
320 /* alloc new usb_request for recip */
321 req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
323 dev_err(dev, "recip request allocation fail\n");
327 /* alloc recip data buffer */
328 buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
330 usb_ep_free_request(&dcp->ep, req);
334 /* recip data is status */
335 *buf = cpu_to_le16(status);
337 /* allocated usb_request/buffer will be freed */
338 req->complete = __usbhsg_recip_send_complete;
340 req->length = sizeof(*buf);
344 pipe->handler = &usbhs_fifo_pio_push_handler;
345 usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
348 static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
349 struct usbhsg_uep *uep,
350 struct usb_ctrlrequest *ctrl)
352 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
353 unsigned short status = 0;
355 if (usbhsg_status_has(gpriv, USBHSG_STATUS_SELF_POWERED))
356 status = 1 << USB_DEVICE_SELF_POWERED;
358 __usbhsg_recip_send_status(gpriv, status);
363 static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
364 struct usbhsg_uep *uep,
365 struct usb_ctrlrequest *ctrl)
367 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
368 unsigned short status = 0;
370 __usbhsg_recip_send_status(gpriv, status);
375 static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
376 struct usbhsg_uep *uep,
377 struct usb_ctrlrequest *ctrl)
379 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
380 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
381 unsigned short status = 0;
383 if (usbhs_pipe_is_stall(pipe))
384 status = 1 << USB_ENDPOINT_HALT;
386 __usbhsg_recip_send_status(gpriv, status);
391 static struct usbhsg_recip_handle req_get_status = {
392 .name = "get status",
393 .device = usbhsg_recip_handler_std_get_device,
394 .interface = usbhsg_recip_handler_std_get_interface,
395 .endpoint = usbhsg_recip_handler_std_get_endpoint,
401 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
402 struct usbhsg_recip_handle *handler,
403 struct usb_ctrlrequest *ctrl)
405 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
406 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
407 struct usbhsg_uep *uep;
408 struct usbhs_pipe *pipe;
409 int recip = ctrl->bRequestType & USB_RECIP_MASK;
410 int nth = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
412 int (*func)(struct usbhs_priv *priv, struct usbhsg_uep *uep,
413 struct usb_ctrlrequest *ctrl);
416 uep = usbhsg_gpriv_to_nth_uep(gpriv, nth);
417 pipe = usbhsg_uep_to_pipe(uep);
419 dev_err(dev, "wrong recip request\n");
424 case USB_RECIP_DEVICE:
426 func = handler->device;
428 case USB_RECIP_INTERFACE:
430 func = handler->interface;
432 case USB_RECIP_ENDPOINT:
434 func = handler->endpoint;
437 dev_warn(dev, "unsupported RECIP(%d)\n", recip);
443 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
444 ret = func(priv, uep, ctrl);
453 * it will be called from usbhs_interrupt
455 static int usbhsg_irq_dev_state(struct usbhs_priv *priv,
456 struct usbhs_irq_state *irq_state)
458 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
459 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
461 gpriv->gadget.speed = usbhs_bus_get_speed(priv);
463 dev_dbg(dev, "state = %x : speed : %d\n",
464 usbhs_status_get_device_state(irq_state),
465 gpriv->gadget.speed);
470 static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
471 struct usbhs_irq_state *irq_state)
473 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
474 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
475 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
476 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
477 struct usb_ctrlrequest ctrl;
478 struct usbhsg_recip_handle *recip_handler = NULL;
479 int stage = usbhs_status_get_ctrl_stage(irq_state);
482 dev_dbg(dev, "stage = %d\n", stage);
488 * - "Interrupt Function"
489 * - "Control Transfer Stage Transition Interrupt"
490 * - Fig. "Control Transfer Stage Transitions"
494 case READ_DATA_STAGE:
495 pipe->handler = &usbhs_fifo_pio_push_handler;
497 case WRITE_DATA_STAGE:
498 pipe->handler = &usbhs_fifo_pio_pop_handler;
500 case NODATA_STATUS_STAGE:
501 pipe->handler = &usbhs_ctrl_stage_end_handler;
503 case READ_STATUS_STAGE:
504 case WRITE_STATUS_STAGE:
505 usbhs_dcp_control_transfer_done(pipe);
514 usbhs_usbreq_get_val(priv, &ctrl);
516 switch (ctrl.bRequestType & USB_TYPE_MASK) {
517 case USB_TYPE_STANDARD:
518 switch (ctrl.bRequest) {
519 case USB_REQ_CLEAR_FEATURE:
520 recip_handler = &req_clear_feature;
522 case USB_REQ_SET_FEATURE:
523 recip_handler = &req_set_feature;
525 case USB_REQ_GET_STATUS:
526 recip_handler = &req_get_status;
532 * setup stage / run recip
535 ret = usbhsg_recip_run_handle(priv, recip_handler, &ctrl);
537 ret = gpriv->driver->setup(&gpriv->gadget, &ctrl);
540 usbhs_pipe_stall(pipe);
550 static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
552 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
553 struct usbhs_pkt *pkt;
556 pkt = usbhs_pkt_pop(pipe, NULL);
560 usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ESHUTDOWN);
563 usbhs_pipe_disable(pipe);
573 static int usbhsg_ep_enable(struct usb_ep *ep,
574 const struct usb_endpoint_descriptor *desc)
576 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
577 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
578 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
579 struct usbhs_pipe *pipe;
583 usbhs_lock(priv, flags);
586 * if it already have pipe,
590 usbhs_pipe_clear(uep->pipe);
591 usbhs_pipe_sequence_data0(uep->pipe);
593 goto usbhsg_ep_enable_end;
596 pipe = usbhs_pipe_malloc(priv,
597 usb_endpoint_type(desc),
598 usb_endpoint_dir_in(desc));
601 pipe->mod_private = uep;
603 /* set epnum / maxp */
604 usbhs_pipe_config_update(pipe, 0,
605 usb_endpoint_num(desc),
606 usb_endpoint_maxp(desc));
609 * usbhs_fifo_dma_push/pop_handler try to
610 * use dmaengine if possible.
611 * It will use pio handler if impossible.
613 if (usb_endpoint_dir_in(desc)) {
614 pipe->handler = &usbhs_fifo_dma_push_handler;
616 pipe->handler = &usbhs_fifo_dma_pop_handler;
617 usbhs_xxxsts_clear(priv, BRDYSTS,
618 usbhs_pipe_number(pipe));
624 usbhsg_ep_enable_end:
625 usbhs_unlock(priv, flags);
630 static int usbhsg_ep_disable(struct usb_ep *ep)
632 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
633 struct usbhs_pipe *pipe;
636 spin_lock_irqsave(&uep->lock, flags);
637 pipe = usbhsg_uep_to_pipe(uep);
641 usbhsg_pipe_disable(uep);
642 usbhs_pipe_free(pipe);
644 uep->pipe->mod_private = NULL;
648 spin_unlock_irqrestore(&uep->lock, flags);
653 static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
656 struct usbhsg_request *ureq;
658 ureq = kzalloc(sizeof *ureq, gfp_flags);
662 usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
667 static void usbhsg_ep_free_request(struct usb_ep *ep,
668 struct usb_request *req)
670 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
672 WARN_ON(!list_empty(&ureq->pkt.node));
676 static int usbhsg_ep_queue(struct usb_ep *ep, struct usb_request *req,
679 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
680 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
681 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
682 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
685 if (usbhsg_is_not_connected(gpriv) ||
686 unlikely(!gpriv->driver) ||
690 usbhsg_queue_push(uep, ureq);
695 static int usbhsg_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
697 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
698 struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
699 struct usbhs_pipe *pipe;
702 spin_lock_irqsave(&uep->lock, flags);
703 pipe = usbhsg_uep_to_pipe(uep);
705 usbhs_pkt_pop(pipe, usbhsg_ureq_to_pkt(ureq));
708 * To dequeue a request, this driver should call the usbhsg_queue_pop()
709 * even if the pipe is NULL.
711 usbhsg_queue_pop(uep, ureq, -ECONNRESET);
712 spin_unlock_irqrestore(&uep->lock, flags);
717 static int __usbhsg_ep_set_halt_wedge(struct usb_ep *ep, int halt, int wedge)
719 struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
720 struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
721 struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
722 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
723 struct device *dev = usbhsg_gpriv_to_dev(gpriv);
727 dev_dbg(dev, "set halt %d (pipe %d)\n",
728 halt, usbhs_pipe_number(pipe));
730 /******************** spin lock ********************/
731 usbhs_lock(priv, flags);
734 * According to usb_ep_set_halt()'s description, this function should
735 * return -EAGAIN if the IN endpoint has any queue or data. Note
736 * that the usbhs_pipe_is_dir_in() returns false if the pipe is an
737 * IN endpoint in the gadget mode.
739 if (!usbhs_pipe_is_dir_in(pipe) && (__usbhsf_pkt_get(pipe) ||
740 usbhs_pipe_contains_transmittable_data(pipe))) {
746 usbhs_pipe_stall(pipe);
748 usbhs_pipe_disable(pipe);
751 usbhsg_status_set(gpriv, USBHSG_STATUS_WEDGE);
753 usbhsg_status_clr(gpriv, USBHSG_STATUS_WEDGE);
756 usbhs_unlock(priv, flags);
757 /******************** spin unlock ******************/
762 static int usbhsg_ep_set_halt(struct usb_ep *ep, int value)
764 return __usbhsg_ep_set_halt_wedge(ep, value, 0);
767 static int usbhsg_ep_set_wedge(struct usb_ep *ep)
769 return __usbhsg_ep_set_halt_wedge(ep, 1, 1);
772 static const struct usb_ep_ops usbhsg_ep_ops = {
773 .enable = usbhsg_ep_enable,
774 .disable = usbhsg_ep_disable,
776 .alloc_request = usbhsg_ep_alloc_request,
777 .free_request = usbhsg_ep_free_request,
779 .queue = usbhsg_ep_queue,
780 .dequeue = usbhsg_ep_dequeue,
782 .set_halt = usbhsg_ep_set_halt,
783 .set_wedge = usbhsg_ep_set_wedge,
789 static int usbhsg_can_pullup(struct usbhs_priv *priv)
791 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
793 return gpriv->driver &&
794 usbhsg_status_has(gpriv, USBHSG_STATUS_SOFT_CONNECT);
797 static void usbhsg_update_pullup(struct usbhs_priv *priv)
799 if (usbhsg_can_pullup(priv))
800 usbhs_sys_function_pullup(priv, 1);
802 usbhs_sys_function_pullup(priv, 0);
806 * usb module start/end
808 static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
810 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
811 struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
812 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
813 struct device *dev = usbhs_priv_to_dev(priv);
817 /******************** spin lock ********************/
818 usbhs_lock(priv, flags);
820 usbhsg_status_set(gpriv, status);
821 if (!(usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
822 usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD)))
823 ret = -1; /* not ready */
825 usbhs_unlock(priv, flags);
826 /******************** spin unlock ********************/
829 return 0; /* not ready is not error */
832 * enable interrupt and systems if ready
834 dev_dbg(dev, "start gadget\n");
837 * pipe initialize and enable DCP
839 usbhs_fifo_init(priv);
840 usbhs_pipe_init(priv,
841 usbhsg_dma_map_ctrl);
843 /* dcp init instead of usbhsg_ep_enable() */
844 dcp->pipe = usbhs_dcp_malloc(priv);
845 dcp->pipe->mod_private = dcp;
846 usbhs_pipe_config_update(dcp->pipe, 0, 0, 64);
849 * system config enble
854 usbhs_sys_function_ctrl(priv, 1);
855 usbhsg_update_pullup(priv);
858 * enable irq callback
860 mod->irq_dev_state = usbhsg_irq_dev_state;
861 mod->irq_ctrl_stage = usbhsg_irq_ctrl_stage;
862 usbhs_irq_callback_update(priv, mod);
867 static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
869 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
870 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
871 struct usbhsg_uep *uep;
872 struct device *dev = usbhs_priv_to_dev(priv);
876 /******************** spin lock ********************/
877 usbhs_lock(priv, flags);
879 usbhsg_status_clr(gpriv, status);
880 if (!usbhsg_status_has(gpriv, USBHSG_STATUS_STARTED) &&
881 !usbhsg_status_has(gpriv, USBHSG_STATUS_REGISTERD))
882 ret = -1; /* already done */
884 usbhs_unlock(priv, flags);
885 /******************** spin unlock ********************/
888 return 0; /* already done is not error */
891 * disable interrupt and systems if 1st try
893 usbhs_fifo_quit(priv);
895 /* disable all irq */
896 mod->irq_dev_state = NULL;
897 mod->irq_ctrl_stage = NULL;
898 usbhs_irq_callback_update(priv, mod);
900 gpriv->gadget.speed = USB_SPEED_UNKNOWN;
903 usbhs_sys_set_test_mode(priv, 0);
904 usbhs_sys_function_ctrl(priv, 0);
906 /* disable all eps */
907 usbhsg_for_each_uep_with_dcp(uep, gpriv, i)
908 usbhsg_ep_disable(&uep->ep);
910 dev_dbg(dev, "stop gadget\n");
916 * VBUS provided by the PHY
918 static int usbhsm_phy_get_vbus(struct platform_device *pdev)
920 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
921 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
923 return gpriv->vbus_active;
926 static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
928 struct usbhs_mod_info *info = &priv->mod_info;
930 info->irq_vbus = NULL;
931 info->get_vbus = usbhsm_phy_get_vbus;
933 usbhs_irq_callback_update(priv, NULL);
941 static int usbhsg_gadget_start(struct usb_gadget *gadget,
942 struct usb_gadget_driver *driver)
944 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
945 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
946 struct device *dev = usbhs_priv_to_dev(priv);
951 driver->max_speed < USB_SPEED_FULL)
954 /* connect to bus through transceiver */
955 if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
956 ret = otg_set_peripheral(gpriv->transceiver->otg,
959 dev_err(dev, "%s: can't bind to transceiver\n",
964 /* get vbus using phy versions */
965 usbhs_mod_phy_mode(priv);
968 /* first hook up the driver ... */
969 gpriv->driver = driver;
971 return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
974 static int usbhsg_gadget_stop(struct usb_gadget *gadget)
976 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
977 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
979 usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
981 if (!IS_ERR_OR_NULL(gpriv->transceiver))
982 otg_set_peripheral(gpriv->transceiver->otg, NULL);
984 gpriv->driver = NULL;
992 static int usbhsg_get_frame(struct usb_gadget *gadget)
994 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
995 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
997 return usbhs_frame_get_num(priv);
1000 static int usbhsg_pullup(struct usb_gadget *gadget, int is_on)
1002 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1003 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1004 unsigned long flags;
1006 usbhs_lock(priv, flags);
1008 usbhsg_status_set(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1010 usbhsg_status_clr(gpriv, USBHSG_STATUS_SOFT_CONNECT);
1011 usbhsg_update_pullup(priv);
1012 usbhs_unlock(priv, flags);
1017 static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
1019 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1022 usbhsg_status_set(gpriv, USBHSG_STATUS_SELF_POWERED);
1024 usbhsg_status_clr(gpriv, USBHSG_STATUS_SELF_POWERED);
1026 gadget->is_selfpowered = (is_self != 0);
1031 static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
1033 struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
1034 struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
1035 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
1037 gpriv->vbus_active = !!is_active;
1039 usbhsc_schedule_notify_hotplug(pdev);
1044 static const struct usb_gadget_ops usbhsg_gadget_ops = {
1045 .get_frame = usbhsg_get_frame,
1046 .set_selfpowered = usbhsg_set_selfpowered,
1047 .udc_start = usbhsg_gadget_start,
1048 .udc_stop = usbhsg_gadget_stop,
1049 .pullup = usbhsg_pullup,
1050 .vbus_session = usbhsg_vbus_session,
1053 static int usbhsg_start(struct usbhs_priv *priv)
1055 return usbhsg_try_start(priv, USBHSG_STATUS_STARTED);
1058 static int usbhsg_stop(struct usbhs_priv *priv)
1060 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1062 /* cable disconnect */
1063 if (gpriv->driver &&
1064 gpriv->driver->disconnect)
1065 gpriv->driver->disconnect(&gpriv->gadget);
1067 return usbhsg_try_stop(priv, USBHSG_STATUS_STARTED);
1070 int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
1072 struct usbhsg_gpriv *gpriv;
1073 struct usbhsg_uep *uep;
1074 struct device *dev = usbhs_priv_to_dev(priv);
1075 struct renesas_usbhs_driver_pipe_config *pipe_configs =
1076 usbhs_get_dparam(priv, pipe_configs);
1077 int pipe_size = usbhs_get_dparam(priv, pipe_size);
1081 gpriv = kzalloc(sizeof(struct usbhsg_gpriv), GFP_KERNEL);
1085 uep = kcalloc(pipe_size, sizeof(struct usbhsg_uep), GFP_KERNEL);
1088 goto usbhs_mod_gadget_probe_err_gpriv;
1091 gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
1092 dev_info(dev, "%stransceiver found\n",
1093 !IS_ERR(gpriv->transceiver) ? "" : "no ");
1098 * There is no guarantee that it is possible to access usb module here.
1099 * Don't accesses to it.
1100 * The accesse will be enable after "usbhsg_start"
1106 usbhs_mod_register(priv, &gpriv->mod, USBHS_GADGET);
1109 gpriv->mod.name = "gadget";
1110 gpriv->mod.start = usbhsg_start;
1111 gpriv->mod.stop = usbhsg_stop;
1113 gpriv->uep_size = pipe_size;
1114 usbhsg_status_init(gpriv);
1119 gpriv->gadget.dev.parent = dev;
1120 gpriv->gadget.name = "renesas_usbhs_udc";
1121 gpriv->gadget.ops = &usbhsg_gadget_ops;
1122 gpriv->gadget.max_speed = USB_SPEED_HIGH;
1123 gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv,
1126 INIT_LIST_HEAD(&gpriv->gadget.ep_list);
1131 usbhsg_for_each_uep_with_dcp(uep, gpriv, i) {
1134 snprintf(uep->ep_name, EP_NAME_SIZE, "ep%d", i);
1136 uep->ep.name = uep->ep_name;
1137 uep->ep.ops = &usbhsg_ep_ops;
1138 INIT_LIST_HEAD(&uep->ep.ep_list);
1139 spin_lock_init(&uep->lock);
1142 if (usbhsg_is_dcp(uep)) {
1143 gpriv->gadget.ep0 = &uep->ep;
1144 usb_ep_set_maxpacket_limit(&uep->ep, 64);
1145 uep->ep.caps.type_control = true;
1147 /* init normal pipe */
1148 if (pipe_configs[i].type == USB_ENDPOINT_XFER_ISOC)
1149 uep->ep.caps.type_iso = true;
1150 if (pipe_configs[i].type == USB_ENDPOINT_XFER_BULK)
1151 uep->ep.caps.type_bulk = true;
1152 if (pipe_configs[i].type == USB_ENDPOINT_XFER_INT)
1153 uep->ep.caps.type_int = true;
1154 usb_ep_set_maxpacket_limit(&uep->ep,
1155 pipe_configs[i].bufsize);
1156 list_add_tail(&uep->ep.ep_list, &gpriv->gadget.ep_list);
1158 uep->ep.caps.dir_in = true;
1159 uep->ep.caps.dir_out = true;
1162 ret = usb_add_gadget_udc(dev, &gpriv->gadget);
1167 dev_info(dev, "gadget probed\n");
1174 usbhs_mod_gadget_probe_err_gpriv:
1180 void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
1182 struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
1184 usb_del_gadget_udc(&gpriv->gadget);