/**
* ep0.c - DesignWare USB3 DRD Controller Endpoint 0 Handling
*
- * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 of
- * the License as published by the Free Software Foundation.
+ * Taken from Linux Kernel v3.19-rc1 (drivers/usb/dwc3/ep0.c) and ported
+ * to uboot.
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * commit c00552ebaf : Merge 3.18-rc7 into usb-next
+ *
+ * SPDX-License-Identifier: GPL-2.0
*/
#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
#include <linux/list.h>
-#include <linux/dma-mapping.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/composite.h>
#include "core.h"
-#include "debug.h"
#include "gadget.h"
#include "io.h"
+#include "linux-compat.h"
+
static void __dwc3_ep0_do_control_status(struct dwc3 *dwc, struct dwc3_ep *dep);
static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
struct dwc3_ep *dep, struct dwc3_request *req);
}
static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma,
- u32 len, u32 type)
+ u32 len, u32 type, unsigned chain)
{
struct dwc3_gadget_ep_cmd_params params;
struct dwc3_trb *trb;
dep = dwc->eps[epnum];
if (dep->flags & DWC3_EP_BUSY) {
- dwc3_trace(trace_dwc3_ep0, "%s still busy", dep->name);
+ dev_vdbg(dwc->dev, "%s still busy", dep->name);
return 0;
}
- trb = dwc->ep0_trb;
+ trb = &dwc->ep0_trb[dep->free_slot];
+
+ if (chain)
+ dep->free_slot++;
trb->bpl = lower_32_bits(buf_dma);
trb->bph = upper_32_bits(buf_dma);
trb->ctrl = type;
trb->ctrl |= (DWC3_TRB_CTRL_HWO
- | DWC3_TRB_CTRL_LST
- | DWC3_TRB_CTRL_IOC
| DWC3_TRB_CTRL_ISP_IMI);
+ if (chain)
+ trb->ctrl |= DWC3_TRB_CTRL_CHN;
+ else
+ trb->ctrl |= (DWC3_TRB_CTRL_IOC
+ | DWC3_TRB_CTRL_LST);
+
+ dwc3_flush_cache((int)buf_dma, len);
+ dwc3_flush_cache((int)trb, sizeof(*trb));
+
+ if (chain)
+ return 0;
+
memset(¶ms, 0, sizeof(params));
params.param0 = upper_32_bits(dwc->ep0_trb_addr);
params.param1 = lower_32_bits(dwc->ep0_trb_addr);
- trace_dwc3_prepare_trb(dep, trb);
-
ret = dwc3_send_gadget_ep_cmd(dwc, dep->number,
DWC3_DEPCMD_STARTTRANSFER, ¶ms);
if (ret < 0) {
- dwc3_trace(trace_dwc3_ep0, "%s STARTTRANSFER failed",
- dep->name);
+ dev_dbg(dwc->dev, "%s STARTTRANSFER failed", dep->name);
return ret;
}
if (dwc->ep0state == EP0_STATUS_PHASE)
__dwc3_ep0_do_control_status(dwc, dwc->eps[direction]);
else
- dwc3_trace(trace_dwc3_ep0,
- "too early for delayed status");
+ dev_dbg(dwc->dev, "too early for delayed status");
return 0;
}
spin_lock_irqsave(&dwc->lock, flags);
if (!dep->endpoint.desc) {
- dwc3_trace(trace_dwc3_ep0,
- "trying to queue request %p to disabled %s",
+ dev_dbg(dwc->dev, "trying to queue request %p to disabled %s",
request, dep->name);
ret = -ESHUTDOWN;
goto out;
goto out;
}
- dwc3_trace(trace_dwc3_ep0,
- "queueing request %p to %s length %d state '%s'",
+ dev_vdbg(dwc->dev, "queueing request %p to %s length %d state '%s'",
request, dep->name, request->length,
dwc3_ep0_state_string(dwc->ep0state));
int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value)
{
- struct dwc3_ep *dep = to_dwc3_ep(ep);
- struct dwc3 *dwc = dep->dwc;
unsigned long flags;
int ret;
int ret;
ret = dwc3_ep0_start_trans(dwc, 0, dwc->ctrl_req_addr, 8,
- DWC3_TRBCTL_CONTROL_SETUP);
+ DWC3_TRBCTL_CONTROL_SETUP, 0);
WARN_ON(ret < 0);
}
addr = le16_to_cpu(ctrl->wValue);
if (addr > 127) {
- dwc3_trace(trace_dwc3_ep0, "invalid device address %d", addr);
+ dev_dbg(dwc->dev, "invalid device address %d", addr);
return -EINVAL;
}
if (state == USB_STATE_CONFIGURED) {
- dwc3_trace(trace_dwc3_ep0,
- "trying to set address when configured");
+ dev_dbg(dwc->dev, "trying to set address when configured");
return -EINVAL;
}
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
dwc->resize_fifos = true;
- dwc3_trace(trace_dwc3_ep0, "resize FIFOs flag SET");
+ dev_dbg(dwc->dev, "resize FIFOs flag SET");
}
break;
struct dwc3_ep *dep;
enum usb_device_state state = dwc->gadget.state;
u16 wLength;
- u16 wValue;
if (state == USB_STATE_DEFAULT)
return -EINVAL;
- wValue = le16_to_cpu(ctrl->wValue);
wLength = le16_to_cpu(ctrl->wLength);
if (wLength != 6) {
switch (ctrl->bRequest) {
case USB_REQ_GET_STATUS:
- dwc3_trace(trace_dwc3_ep0, "USB_REQ_GET_STATUS");
+ dev_vdbg(dwc->dev, "USB_REQ_GET_STATUS");
ret = dwc3_ep0_handle_status(dwc, ctrl);
break;
case USB_REQ_CLEAR_FEATURE:
- dwc3_trace(trace_dwc3_ep0, "USB_REQ_CLEAR_FEATURE");
+ dev_vdbg(dwc->dev, "USB_REQ_CLEAR_FEATURE");
ret = dwc3_ep0_handle_feature(dwc, ctrl, 0);
break;
case USB_REQ_SET_FEATURE:
- dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_FEATURE");
+ dev_vdbg(dwc->dev, "USB_REQ_SET_FEATURE");
ret = dwc3_ep0_handle_feature(dwc, ctrl, 1);
break;
case USB_REQ_SET_ADDRESS:
- dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_ADDRESS");
+ dev_vdbg(dwc->dev, "USB_REQ_SET_ADDRESS");
ret = dwc3_ep0_set_address(dwc, ctrl);
break;
case USB_REQ_SET_CONFIGURATION:
- dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_CONFIGURATION");
+ dev_vdbg(dwc->dev, "USB_REQ_SET_CONFIGURATION");
ret = dwc3_ep0_set_config(dwc, ctrl);
break;
case USB_REQ_SET_SEL:
- dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_SEL");
+ dev_vdbg(dwc->dev, "USB_REQ_SET_SEL");
ret = dwc3_ep0_set_sel(dwc, ctrl);
break;
case USB_REQ_SET_ISOCH_DELAY:
- dwc3_trace(trace_dwc3_ep0, "USB_REQ_SET_ISOCH_DELAY");
+ dev_vdbg(dwc->dev, "USB_REQ_SET_ISOCH_DELAY");
ret = dwc3_ep0_set_isoch_delay(dwc, ctrl);
break;
default:
- dwc3_trace(trace_dwc3_ep0, "Forwarding to gadget driver");
+ dev_vdbg(dwc->dev, "Forwarding to gadget driver");
ret = dwc3_ep0_delegate_req(dwc, ctrl);
break;
}
if (!dwc->gadget_driver)
goto out;
- trace_dwc3_ctrl_req(ctrl);
-
len = le16_to_cpu(ctrl->wLength);
if (!len) {
dwc->three_stage_setup = false;
struct usb_request *ur;
struct dwc3_trb *trb;
struct dwc3_ep *ep0;
- u32 transferred;
+ unsigned transfer_size = 0;
+ unsigned maxp;
+ void *buf;
+ u32 transferred = 0;
u32 status;
u32 length;
u8 epnum;
trb = dwc->ep0_trb;
- trace_dwc3_complete_trb(ep0, trb);
-
r = next_request(&ep0->request_list);
if (!r)
return;
+ dwc3_flush_cache((int)trb, sizeof(*trb));
+
status = DWC3_TRB_SIZE_TRBSTS(trb->size);
if (status == DWC3_TRBSTS_SETUP_PENDING) {
- dwc3_trace(trace_dwc3_ep0, "Setup Pending received");
+ dev_dbg(dwc->dev, "Setup Pending received");
if (r)
dwc3_gadget_giveback(ep0, r, -ECONNRESET);
}
ur = &r->request;
+ buf = ur->buf;
length = trb->size & DWC3_TRB_SIZE_MASK;
+ maxp = ep0->endpoint.maxpacket;
+
if (dwc->ep0_bounced) {
- unsigned transfer_size = ur->length;
- unsigned maxp = ep0->endpoint.maxpacket;
+ /*
+ * Handle the first TRB before handling the bounce buffer if
+ * the request length is greater than the bounce buffer size.
+ */
+ if (ur->length > DWC3_EP0_BOUNCE_SIZE) {
+ transfer_size = (ur->length / maxp) * maxp;
+ transferred = transfer_size - length;
+ buf = (u8 *)buf + transferred;
+ ur->actual += transferred;
+
+ trb++;
+ dwc3_flush_cache((int)trb, sizeof(*trb));
+ length = trb->size & DWC3_TRB_SIZE_MASK;
- transfer_size += (maxp - (transfer_size % maxp));
- transferred = min_t(u32, ur->length,
- transfer_size - length);
- memcpy(ur->buf, dwc->ep0_bounce, transferred);
+ ep0->free_slot = 0;
+ }
+
+ transfer_size = roundup((ur->length - transfer_size),
+ maxp);
+ transferred = min_t(u32, ur->length - transferred,
+ transfer_size - length);
+ dwc3_flush_cache((int)dwc->ep0_bounce, DWC3_EP0_BOUNCE_SIZE);
+ memcpy(buf, dwc->ep0_bounce, transferred);
} else {
transferred = ur->length - length;
}
ret = dwc3_ep0_start_trans(dwc, epnum,
dwc->ctrl_req_addr, 0,
- DWC3_TRBCTL_CONTROL_DATA);
+ DWC3_TRBCTL_CONTROL_DATA, 0);
WARN_ON(ret < 0);
}
}
dep = dwc->eps[0];
trb = dwc->ep0_trb;
- trace_dwc3_complete_trb(dep, trb);
-
if (!list_empty(&dep->request_list)) {
r = next_request(&dep->request_list);
ret = dwc3_gadget_set_test_mode(dwc, dwc->test_mode_nr);
if (ret < 0) {
- dwc3_trace(trace_dwc3_ep0, "Invalid Test #%d",
+ dev_dbg(dwc->dev, "Invalid Test #%d",
dwc->test_mode_nr);
dwc3_ep0_stall_and_restart(dwc);
return;
status = DWC3_TRB_SIZE_TRBSTS(trb->size);
if (status == DWC3_TRBSTS_SETUP_PENDING)
- dwc3_trace(trace_dwc3_ep0, "Setup Pending received");
+ dev_dbg(dwc->dev, "Setup Pending received");
dwc->ep0state = EP0_SETUP_PHASE;
dwc3_ep0_out_start(dwc);
switch (dwc->ep0state) {
case EP0_SETUP_PHASE:
- dwc3_trace(trace_dwc3_ep0, "Setup Phase");
+ dev_vdbg(dwc->dev, "Setup Phase");
dwc3_ep0_inspect_setup(dwc, event);
break;
case EP0_DATA_PHASE:
- dwc3_trace(trace_dwc3_ep0, "Data Phase");
+ dev_vdbg(dwc->dev, "Data Phase");
dwc3_ep0_complete_data(dwc, event);
break;
case EP0_STATUS_PHASE:
- dwc3_trace(trace_dwc3_ep0, "Status Phase");
+ dev_vdbg(dwc->dev, "Status Phase");
dwc3_ep0_complete_status(dwc, event);
break;
default:
if (req->request.length == 0) {
ret = dwc3_ep0_start_trans(dwc, dep->number,
- dwc->ctrl_req_addr, 0,
- DWC3_TRBCTL_CONTROL_DATA);
- } else if (!IS_ALIGNED(req->request.length, dep->endpoint.maxpacket)
- && (dep->number == 0)) {
- u32 transfer_size;
+ dwc->ctrl_req_addr, 0,
+ DWC3_TRBCTL_CONTROL_DATA, 0);
+ } else if (!IS_ALIGNED(req->request.length, dep->endpoint.maxpacket) &&
+ (dep->number == 0)) {
+ u32 transfer_size = 0;
u32 maxpacket;
ret = usb_gadget_map_request(&dwc->gadget, &req->request,
return;
}
- WARN_ON(req->request.length > DWC3_EP0_BOUNCE_SIZE);
-
maxpacket = dep->endpoint.maxpacket;
- transfer_size = roundup(req->request.length, maxpacket);
+ if (req->request.length > DWC3_EP0_BOUNCE_SIZE) {
+ transfer_size = (req->request.length / maxpacket) *
+ maxpacket;
+ ret = dwc3_ep0_start_trans(dwc, dep->number,
+ req->request.dma,
+ transfer_size,
+ DWC3_TRBCTL_CONTROL_DATA, 1);
+ }
+
+ transfer_size = roundup((req->request.length - transfer_size),
+ maxpacket);
dwc->ep0_bounced = true;
* TRBs to handle the transfer.
*/
ret = dwc3_ep0_start_trans(dwc, dep->number,
- dwc->ep0_bounce_addr, transfer_size,
- DWC3_TRBCTL_CONTROL_DATA);
+ dwc->ep0_bounce_addr, transfer_size,
+ DWC3_TRBCTL_CONTROL_DATA, 0);
} else {
ret = usb_gadget_map_request(&dwc->gadget, &req->request,
dep->number);
}
ret = dwc3_ep0_start_trans(dwc, dep->number, req->request.dma,
- req->request.length, DWC3_TRBCTL_CONTROL_DATA);
+ req->request.length,
+ DWC3_TRBCTL_CONTROL_DATA, 0);
}
WARN_ON(ret < 0);
: DWC3_TRBCTL_CONTROL_STATUS2;
return dwc3_ep0_start_trans(dwc, dep->number,
- dwc->ctrl_req_addr, 0, type);
+ dwc->ctrl_req_addr, 0, type, 0);
}
static void __dwc3_ep0_do_control_status(struct dwc3 *dwc, struct dwc3_ep *dep)
{
if (dwc->resize_fifos) {
- dwc3_trace(trace_dwc3_ep0, "Resizing FIFOs");
+ dev_dbg(dwc->dev, "Resizing FIFOs");
dwc3_gadget_resize_tx_fifos(dwc);
dwc->resize_fifos = 0;
}
switch (event->status) {
case DEPEVT_STATUS_CONTROL_DATA:
- dwc3_trace(trace_dwc3_ep0, "Control Data");
+ dev_vdbg(dwc->dev, "Control Data");
/*
* We already have a DATA transfer in the controller's cache,
if (dwc->ep0_expect_in != event->endpoint_number) {
struct dwc3_ep *dep = dwc->eps[dwc->ep0_expect_in];
- dwc3_trace(trace_dwc3_ep0,
- "Wrong direction for Data phase");
+ dev_vdbg(dwc->dev, "Wrong direction for Data phase");
dwc3_ep0_end_control_data(dwc, dep);
dwc3_ep0_stall_and_restart(dwc);
return;
if (dwc->ep0_next_event != DWC3_EP0_NRDY_STATUS)
return;
- dwc3_trace(trace_dwc3_ep0, "Control Status");
+ dev_vdbg(dwc->dev, "Control Status");
dwc->ep0state = EP0_STATUS_PHASE;
if (dwc->delayed_status) {
WARN_ON_ONCE(event->endpoint_number != 1);
- dwc3_trace(trace_dwc3_ep0, "Delayed Status");
+ dev_vdbg(dwc->dev, "Delayed Status");
return;
}
{
u8 epnum = event->endpoint_number;
- dwc3_trace(trace_dwc3_ep0, "%s while ep%d%s in state '%s'",
+ dev_dbg(dwc->dev, "%s while ep%d%s in state '%s'",
dwc3_ep_event_string(event->endpoint_event),
epnum >> 1, (epnum & 1) ? "in" : "out",
dwc3_ep0_state_string(dwc->ep0state));
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