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path: root/drivers/usb/gadget/ci13xxx_udc.c
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Diffstat (limited to 'drivers/usb/gadget/ci13xxx_udc.c')
-rw-r--r--drivers/usb/gadget/ci13xxx_udc.c344
1 files changed, 239 insertions, 105 deletions
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index a1c67ae1572..e09178bc145 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -435,20 +435,6 @@ static int hw_ep_get_halt(int num, int dir)
}
/**
- * hw_ep_is_primed: test if endpoint is primed (execute without interruption)
- * @num: endpoint number
- * @dir: endpoint direction
- *
- * This function returns true if endpoint primed
- */
-static int hw_ep_is_primed(int num, int dir)
-{
- u32 reg = hw_cread(CAP_ENDPTPRIME, ~0) | hw_cread(CAP_ENDPTSTAT, ~0);
-
- return test_bit(hw_ep_bit(num, dir), (void *)&reg);
-}
-
-/**
* hw_test_and_clear_setup_status: test & clear setup status (execute without
* interruption)
* @n: bit number (endpoint)
@@ -472,10 +458,6 @@ static int hw_ep_prime(int num, int dir, int is_ctrl)
{
int n = hw_ep_bit(num, dir);
- /* the caller should flush first */
- if (hw_ep_is_primed(num, dir))
- return -EBUSY;
-
if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
return -EAGAIN;
@@ -1434,6 +1416,8 @@ static inline u8 _usb_addr(struct ci13xxx_ep *ep)
static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
{
unsigned i;
+ int ret = 0;
+ unsigned length = mReq->req.length;
trace("%p, %p", mEp, mReq);
@@ -1441,53 +1425,91 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
if (mReq->req.status == -EALREADY)
return -EALREADY;
- if (hw_ep_is_primed(mEp->num, mEp->dir))
- return -EBUSY;
-
mReq->req.status = -EALREADY;
-
- if (mReq->req.length && !mReq->req.dma) {
+ if (length && !mReq->req.dma) {
mReq->req.dma = \
dma_map_single(mEp->device, mReq->req.buf,
- mReq->req.length, mEp->dir ?
- DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ length, mEp->dir ? DMA_TO_DEVICE :
+ DMA_FROM_DEVICE);
if (mReq->req.dma == 0)
return -ENOMEM;
mReq->map = 1;
}
+ if (mReq->req.zero && length && (length % mEp->ep.maxpacket == 0)) {
+ mReq->zptr = dma_pool_alloc(mEp->td_pool, GFP_ATOMIC,
+ &mReq->zdma);
+ if (mReq->zptr == NULL) {
+ if (mReq->map) {
+ dma_unmap_single(mEp->device, mReq->req.dma,
+ length, mEp->dir ? DMA_TO_DEVICE :
+ DMA_FROM_DEVICE);
+ mReq->req.dma = 0;
+ mReq->map = 0;
+ }
+ return -ENOMEM;
+ }
+ memset(mReq->zptr, 0, sizeof(*mReq->zptr));
+ mReq->zptr->next = TD_TERMINATE;
+ mReq->zptr->token = TD_STATUS_ACTIVE;
+ if (!mReq->req.no_interrupt)
+ mReq->zptr->token |= TD_IOC;
+ }
/*
* TD configuration
* TODO - handle requests which spawns into several TDs
*/
memset(mReq->ptr, 0, sizeof(*mReq->ptr));
- mReq->ptr->next |= TD_TERMINATE;
- mReq->ptr->token = mReq->req.length << ffs_nr(TD_TOTAL_BYTES);
+ mReq->ptr->token = length << ffs_nr(TD_TOTAL_BYTES);
mReq->ptr->token &= TD_TOTAL_BYTES;
- mReq->ptr->token |= TD_IOC;
mReq->ptr->token |= TD_STATUS_ACTIVE;
+ if (mReq->zptr) {
+ mReq->ptr->next = mReq->zdma;
+ } else {
+ mReq->ptr->next = TD_TERMINATE;
+ if (!mReq->req.no_interrupt)
+ mReq->ptr->token |= TD_IOC;
+ }
mReq->ptr->page[0] = mReq->req.dma;
for (i = 1; i < 5; i++)
mReq->ptr->page[i] =
(mReq->req.dma + i * CI13XXX_PAGE_SIZE) & ~TD_RESERVED_MASK;
- /*
- * QH configuration
- * At this point it's guaranteed exclusive access to qhead
- * (endpt is not primed) so it's no need to use tripwire
- */
+ if (!list_empty(&mEp->qh.queue)) {
+ struct ci13xxx_req *mReqPrev;
+ int n = hw_ep_bit(mEp->num, mEp->dir);
+ int tmp_stat;
+
+ mReqPrev = list_entry(mEp->qh.queue.prev,
+ struct ci13xxx_req, queue);
+ if (mReqPrev->zptr)
+ mReqPrev->zptr->next = mReq->dma & TD_ADDR_MASK;
+ else
+ mReqPrev->ptr->next = mReq->dma & TD_ADDR_MASK;
+ wmb();
+ if (hw_cread(CAP_ENDPTPRIME, BIT(n)))
+ goto done;
+ do {
+ hw_cwrite(CAP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW);
+ tmp_stat = hw_cread(CAP_ENDPTSTAT, BIT(n));
+ } while (!hw_cread(CAP_USBCMD, USBCMD_ATDTW));
+ hw_cwrite(CAP_USBCMD, USBCMD_ATDTW, 0);
+ if (tmp_stat)
+ goto done;
+ }
+
+ /* QH configuration */
mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */
mEp->qh.ptr->td.token &= ~TD_STATUS; /* clear status */
- if (mReq->req.zero == 0)
- mEp->qh.ptr->cap |= QH_ZLT;
- else
- mEp->qh.ptr->cap &= ~QH_ZLT;
+ mEp->qh.ptr->cap |= QH_ZLT;
wmb(); /* synchronize before ep prime */
- return hw_ep_prime(mEp->num, mEp->dir,
+ ret = hw_ep_prime(mEp->num, mEp->dir,
mEp->type == USB_ENDPOINT_XFER_CONTROL);
+done:
+ return ret;
}
/**
@@ -1504,8 +1526,15 @@ static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
if (mReq->req.status != -EALREADY)
return -EINVAL;
- if (hw_ep_is_primed(mEp->num, mEp->dir))
- hw_ep_flush(mEp->num, mEp->dir);
+ if ((TD_STATUS_ACTIVE & mReq->ptr->token) != 0)
+ return -EBUSY;
+
+ if (mReq->zptr) {
+ if ((TD_STATUS_ACTIVE & mReq->zptr->token) != 0)
+ return -EBUSY;
+ dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma);
+ mReq->zptr = NULL;
+ }
mReq->req.status = 0;
@@ -1517,9 +1546,7 @@ static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
}
mReq->req.status = mReq->ptr->token & TD_STATUS;
- if ((TD_STATUS_ACTIVE & mReq->req.status) != 0)
- mReq->req.status = -ECONNRESET;
- else if ((TD_STATUS_HALTED & mReq->req.status) != 0)
+ if ((TD_STATUS_HALTED & mReq->req.status) != 0)
mReq->req.status = -1;
else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
mReq->req.status = -1;
@@ -1581,12 +1608,19 @@ static int _gadget_stop_activity(struct usb_gadget *gadget)
{
struct usb_ep *ep;
struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
+ unsigned long flags;
trace("%p", gadget);
if (gadget == NULL)
return -EINVAL;
+ spin_lock_irqsave(udc->lock, flags);
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+ udc->remote_wakeup = 0;
+ udc->suspended = 0;
+ spin_unlock_irqrestore(udc->lock, flags);
+
/* flush all endpoints */
gadget_for_each_ep(ep, gadget) {
usb_ep_fifo_flush(ep);
@@ -1720,7 +1754,8 @@ __acquires(mEp->lock)
}
if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
- /* TODO: D1 - Remote Wakeup; D0 - Self Powered */
+ /* Assume that device is bus powered for now. */
+ *((u16 *)req->buf) = _udc->remote_wakeup << 1;
retval = 0;
} else if ((setup->bRequestType & USB_RECIP_MASK) \
== USB_RECIP_ENDPOINT) {
@@ -1749,6 +1784,28 @@ __acquires(mEp->lock)
}
/**
+ * isr_setup_status_complete: setup_status request complete function
+ * @ep: endpoint
+ * @req: request handled
+ *
+ * Caller must release lock. Put the port in test mode if test mode
+ * feature is selected.
+ */
+static void
+isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct ci13xxx *udc = req->context;
+ unsigned long flags;
+
+ trace("%p, %p", ep, req);
+
+ spin_lock_irqsave(udc->lock, flags);
+ if (udc->test_mode)
+ hw_port_test_set(udc->test_mode);
+ spin_unlock_irqrestore(udc->lock, flags);
+}
+
+/**
* isr_setup_status_phase: queues the status phase of a setup transation
* @udc: udc struct
*
@@ -1764,6 +1821,8 @@ __acquires(mEp->lock)
trace("%p", udc);
mEp = (udc->ep0_dir == TX) ? &udc->ep0out : &udc->ep0in;
+ udc->status->context = udc;
+ udc->status->complete = isr_setup_status_complete;
spin_unlock(mEp->lock);
retval = usb_ep_queue(&mEp->ep, udc->status, GFP_ATOMIC);
@@ -1783,7 +1842,7 @@ static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
__releases(mEp->lock)
__acquires(mEp->lock)
{
- struct ci13xxx_req *mReq;
+ struct ci13xxx_req *mReq, *mReqTemp;
int retval;
trace("%p", mEp);
@@ -1791,34 +1850,25 @@ __acquires(mEp->lock)
if (list_empty(&mEp->qh.queue))
return -EINVAL;
- /* pop oldest request */
- mReq = list_entry(mEp->qh.queue.next,
- struct ci13xxx_req, queue);
- list_del_init(&mReq->queue);
-
- retval = _hardware_dequeue(mEp, mReq);
- if (retval < 0) {
- dbg_event(_usb_addr(mEp), "DONE", retval);
- goto done;
- }
-
- dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
-
- if (!list_empty(&mEp->qh.queue)) {
- struct ci13xxx_req* mReqEnq;
-
- mReqEnq = list_entry(mEp->qh.queue.next,
- struct ci13xxx_req, queue);
- _hardware_enqueue(mEp, mReqEnq);
+ list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue,
+ queue) {
+ retval = _hardware_dequeue(mEp, mReq);
+ if (retval < 0)
+ break;
+ list_del_init(&mReq->queue);
+ dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
+ if (mReq->req.complete != NULL) {
+ spin_unlock(mEp->lock);
+ mReq->req.complete(&mEp->ep, &mReq->req);
+ spin_lock(mEp->lock);
+ }
}
- if (mReq->req.complete != NULL) {
- spin_unlock(mEp->lock);
- mReq->req.complete(&mEp->ep, &mReq->req);
- spin_lock(mEp->lock);
- }
+ if (retval == EBUSY)
+ retval = 0;
+ if (retval < 0)
+ dbg_event(_usb_addr(mEp), "DONE", retval);
- done:
return retval;
}
@@ -1833,6 +1883,7 @@ __releases(udc->lock)
__acquires(udc->lock)
{
unsigned i;
+ u8 tmode = 0;
trace("%p", udc);
@@ -1895,22 +1946,32 @@ __acquires(udc->lock)
switch (req.bRequest) {
case USB_REQ_CLEAR_FEATURE:
- if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
- le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
- goto delegate;
- if (req.wLength != 0)
- break;
- num = le16_to_cpu(req.wIndex);
- num &= USB_ENDPOINT_NUMBER_MASK;
- if (!udc->ci13xxx_ep[num].wedge) {
- spin_unlock(udc->lock);
- err = usb_ep_clear_halt(
- &udc->ci13xxx_ep[num].ep);
- spin_lock(udc->lock);
- if (err)
+ if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
+ le16_to_cpu(req.wValue) ==
+ USB_ENDPOINT_HALT) {
+ if (req.wLength != 0)
break;
+ num = le16_to_cpu(req.wIndex);
+ num &= USB_ENDPOINT_NUMBER_MASK;
+ if (!udc->ci13xxx_ep[num].wedge) {
+ spin_unlock(udc->lock);
+ err = usb_ep_clear_halt(
+ &udc->ci13xxx_ep[num].ep);
+ spin_lock(udc->lock);
+ if (err)
+ break;
+ }
+ err = isr_setup_status_phase(udc);
+ } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) &&
+ le16_to_cpu(req.wValue) ==
+ USB_DEVICE_REMOTE_WAKEUP) {
+ if (req.wLength != 0)
+ break;
+ udc->remote_wakeup = 0;
+ err = isr_setup_status_phase(udc);
+ } else {
+ goto delegate;
}
- err = isr_setup_status_phase(udc);
break;
case USB_REQ_GET_STATUS:
if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
@@ -1934,20 +1995,48 @@ __acquires(udc->lock)
err = isr_setup_status_phase(udc);
break;
case USB_REQ_SET_FEATURE:
- if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
- le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
- goto delegate;
- if (req.wLength != 0)
- break;
- num = le16_to_cpu(req.wIndex);
- num &= USB_ENDPOINT_NUMBER_MASK;
+ if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
+ le16_to_cpu(req.wValue) ==
+ USB_ENDPOINT_HALT) {
+ if (req.wLength != 0)
+ break;
+ num = le16_to_cpu(req.wIndex);
+ num &= USB_ENDPOINT_NUMBER_MASK;
- spin_unlock(udc->lock);
- err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
- spin_lock(udc->lock);
- if (err)
- break;
- err = isr_setup_status_phase(udc);
+ spin_unlock(udc->lock);
+ err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
+ spin_lock(udc->lock);
+ if (!err)
+ isr_setup_status_phase(udc);
+ } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) {
+ if (req.wLength != 0)
+ break;
+ switch (le16_to_cpu(req.wValue)) {
+ case USB_DEVICE_REMOTE_WAKEUP:
+ udc->remote_wakeup = 1;
+ err = isr_setup_status_phase(udc);
+ break;
+ case USB_DEVICE_TEST_MODE:
+ tmode = le16_to_cpu(req.wIndex) >> 8;
+ switch (tmode) {
+ case TEST_J:
+ case TEST_K:
+ case TEST_SE0_NAK:
+ case TEST_PACKET:
+ case TEST_FORCE_EN:
+ udc->test_mode = tmode;
+ err = isr_setup_status_phase(
+ udc);
+ break;
+ default:
+ break;
+ }
+ default:
+ goto delegate;
+ }
+ } else {
+ goto delegate;
+ }
break;
default:
delegate:
@@ -2178,15 +2267,15 @@ static int ep_queue(struct usb_ep *ep, struct usb_request *req,
/* push request */
mReq->req.status = -EINPROGRESS;
mReq->req.actual = 0;
- list_add_tail(&mReq->queue, &mEp->qh.queue);
- if (list_is_singular(&mEp->qh.queue))
- retval = _hardware_enqueue(mEp, mReq);
+ retval = _hardware_enqueue(mEp, mReq);
if (retval == -EALREADY) {
dbg_event(_usb_addr(mEp), "QUEUE", retval);
retval = 0;
}
+ if (!retval)
+ list_add_tail(&mReq->queue, &mEp->qh.queue);
done:
spin_unlock_irqrestore(mEp->lock, flags);
@@ -2206,19 +2295,25 @@ static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
trace("%p, %p", ep, req);
- if (ep == NULL || req == NULL || mEp->desc == NULL ||
- list_empty(&mReq->queue) || list_empty(&mEp->qh.queue))
+ if (ep == NULL || req == NULL || mReq->req.status != -EALREADY ||
+ mEp->desc == NULL || list_empty(&mReq->queue) ||
+ list_empty(&mEp->qh.queue))
return -EINVAL;
spin_lock_irqsave(mEp->lock, flags);
dbg_event(_usb_addr(mEp), "DEQUEUE", 0);
- if (mReq->req.status == -EALREADY)
- _hardware_dequeue(mEp, mReq);
+ hw_ep_flush(mEp->num, mEp->dir);
/* pop request */
list_del_init(&mReq->queue);
+ if (mReq->map) {
+ dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
+ mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ mReq->req.dma = 0;
+ mReq->map = 0;
+ }
req->status = -ECONNRESET;
if (mReq->req.complete != NULL) {
@@ -2377,6 +2472,31 @@ static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
return 0;
}
+static int ci13xxx_wakeup(struct usb_gadget *_gadget)
+{
+ struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
+ unsigned long flags;
+ int ret = 0;
+
+ trace();
+
+ spin_lock_irqsave(udc->lock, flags);
+ if (!udc->remote_wakeup) {
+ ret = -EOPNOTSUPP;
+ dbg_trace("remote wakeup feature is not enabled\n");
+ goto out;
+ }
+ if (!hw_cread(CAP_PORTSC, PORTSC_SUSP)) {
+ ret = -EINVAL;
+ dbg_trace("port is not suspended\n");
+ goto out;
+ }
+ hw_cwrite(CAP_PORTSC, PORTSC_FPR, PORTSC_FPR);
+out:
+ spin_unlock_irqrestore(udc->lock, flags);
+ return ret;
+}
+
/**
* Device operations part of the API to the USB controller hardware,
* which don't involve endpoints (or i/o)
@@ -2384,6 +2504,7 @@ static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
*/
static const struct usb_gadget_ops usb_gadget_ops = {
.vbus_session = ci13xxx_vbus_session,
+ .wakeup = ci13xxx_wakeup,
};
/**
@@ -2626,6 +2747,12 @@ static irqreturn_t udc_irq(void)
isr_statistics.pci++;
udc->gadget.speed = hw_port_is_high_speed() ?
USB_SPEED_HIGH : USB_SPEED_FULL;
+ if (udc->suspended) {
+ spin_unlock(udc->lock);
+ udc->driver->resume(&udc->gadget);
+ spin_lock(udc->lock);
+ udc->suspended = 0;
+ }
}
if (USBi_UEI & intr)
isr_statistics.uei++;
@@ -2633,8 +2760,15 @@ static irqreturn_t udc_irq(void)
isr_statistics.ui++;
isr_tr_complete_handler(udc);
}
- if (USBi_SLI & intr)
+ if (USBi_SLI & intr) {
+ if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
+ udc->suspended = 1;
+ spin_unlock(udc->lock);
+ udc->driver->suspend(&udc->gadget);
+ spin_lock(udc->lock);
+ }
isr_statistics.sli++;
+ }
retval = IRQ_HANDLED;
} else {
isr_statistics.none++;