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authorAaro Koskinen <aaro.koskinen@iki.fi>2013-10-06 19:22:28 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-07 05:02:21 (GMT)
commit75ee5124871070fc4085de7ad94565cfa423960b (patch)
tree6c8818ba8f120f75653559d3826ca80e71cbc8d9 /drivers/staging/octeon-usb
parent393e2146869c215470d6e78e946395f3331c3fd7 (diff)
staging: octeon-usb: call transfer completion callback directly
The callback is always the same, we can just call it directly. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/octeon-usb')
-rw-r--r--drivers/staging/octeon-usb/octeon-hcd.c354
1 files changed, 111 insertions, 243 deletions
diff --git a/drivers/staging/octeon-usb/octeon-hcd.c b/drivers/staging/octeon-usb/octeon-hcd.c
index 47d0585..25d6e3c 100644
--- a/drivers/staging/octeon-usb/octeon-hcd.c
+++ b/drivers/staging/octeon-usb/octeon-hcd.c
@@ -205,48 +205,6 @@ struct cvmx_usb_iso_packet {
};
/**
- * enum cvmx_usb_callback - possible callback reasons for the USB API
- *
- * @CVMX_USB_CALLBACK_TRANSFER_COMPLETE: A callback of this type is called when
- * a submitted transfer completes. The
- * completion callback will be called even
- * if the transfer fails or is canceled.
- * The status parameter will contain
- * details of why he callback was called.
- * @__CVMX_USB_CALLBACK_END: Do not use. Used internally for array
- * bounds.
- */
-enum cvmx_usb_callback {
- CVMX_USB_CALLBACK_TRANSFER_COMPLETE,
- __CVMX_USB_CALLBACK_END
-};
-
-struct cvmx_usb_state;
-
-/**
- * USB callback functions are always of the following type.
- * The parameters are as follows:
- * - usb = USB device state populated by cvmx_usb_initialize().
- * - reason = The enum cvmx_usb_callback used to register
- * the callback.
- * - status = The enum cvmx_usb_complete representing the
- * status code of a transaction.
- * - pipe_handle = The Pipe that caused this callback, or
- * -1 if this callback wasn't associated with a pipe.
- * - submit_handle = Transfer submit handle causing this
- * callback, or -1 if this callback wasn't associated
- * with a transfer.
- * - Actual number of bytes transfer.
- * - user_data = The user pointer supplied to the
- * function cvmx_usb_submit().
- */
-typedef void (*cvmx_usb_callback_func_t)(struct cvmx_usb_state *usb,
- enum cvmx_usb_callback reason,
- enum cvmx_usb_complete status,
- int pipe_handle, int submit_handle,
- int bytes_transferred, void *user_data);
-
-/**
* enum cvmx_usb_initialize_flags - flags used by the initialization function
*
* @CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI: The USB port uses a 12MHz crystal
@@ -376,7 +334,6 @@ enum cvmx_usb_stage {
* @iso_packets: For ISO transactions, the sub packets in the request.
* @actual_bytes: Actual bytes transfer for this transaction.
* @stage: For control transactions, the current stage.
- * @callback: User's callback function when complete.
* @callback_data: User's data.
*/
struct cvmx_usb_transaction {
@@ -395,7 +352,6 @@ struct cvmx_usb_transaction {
int retries;
int actual_bytes;
enum cvmx_usb_stage stage;
- cvmx_usb_callback_func_t callback;
void *callback_data;
};
@@ -2173,51 +2129,110 @@ done:
return;
}
+static inline struct octeon_hcd *cvmx_usb_to_octeon(struct cvmx_usb_state *p)
+{
+ return container_of(p, struct octeon_hcd, usb);
+}
-/**
- * Call a user's callback for a specific reason.
- *
- * @usb: USB device state populated by cvmx_usb_initialize().
- * @pipe: Pipe the callback is for or NULL
- * @transaction:
- * Transaction the callback is for or NULL
- * @reason: Reason this callback is being called
- * @complete_code:
- * Completion code for the transaction, if any
- */
-static void __cvmx_usb_perform_callback(struct cvmx_usb_state *usb,
- struct cvmx_usb_pipe *pipe,
- struct cvmx_usb_transaction *transaction,
- enum cvmx_usb_callback reason,
- enum cvmx_usb_complete complete_code)
+static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p)
{
- cvmx_usb_callback_func_t callback = NULL;
- void *user_data;
- int submit_handle = -1;
- int pipe_handle = -1;
- int bytes_transferred = 0;
-
- if (pipe)
- pipe_handle = __cvmx_usb_get_pipe_handle(usb, pipe);
-
- if (transaction) {
- submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
- bytes_transferred = transaction->actual_bytes;
- /* Transactions are allowed to override the default callback */
- if ((reason == CVMX_USB_CALLBACK_TRANSFER_COMPLETE) && transaction->callback) {
- callback = transaction->callback;
- user_data = transaction->callback_data;
- }
+ return container_of((void *)p, struct usb_hcd, hcd_priv);
+}
+
+static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb,
+ enum cvmx_usb_complete status,
+ int pipe_handle,
+ int submit_handle,
+ int bytes_transferred,
+ void *user_data)
+{
+ struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
+ struct usb_hcd *hcd = octeon_to_hcd(priv);
+ struct device *dev = hcd->self.controller;
+ struct urb *urb = user_data;
+
+ urb->actual_length = bytes_transferred;
+ urb->hcpriv = NULL;
+
+ if (!list_empty(&urb->urb_list)) {
+ /*
+ * It is on the dequeue_list, but we are going to call
+ * usb_hcd_giveback_urb(), so we must clear it from
+ * the list. We got to it before the
+ * octeon_usb_urb_dequeue_work() tasklet did.
+ */
+ list_del(&urb->urb_list);
+ /* No longer on the dequeue_list. */
+ INIT_LIST_HEAD(&urb->urb_list);
}
- if (!callback)
- return;
+ /* For Isochronous transactions we need to update the URB packet status
+ list from data in our private copy */
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ int i;
+ /*
+ * The pointer to the private list is stored in the setup_packet
+ * field.
+ */
+ struct cvmx_usb_iso_packet *iso_packet =
+ (struct cvmx_usb_iso_packet *) urb->setup_packet;
+ /* Recalculate the transfer size by adding up each packet */
+ urb->actual_length = 0;
+ for (i = 0; i < urb->number_of_packets; i++) {
+ if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) {
+ urb->iso_frame_desc[i].status = 0;
+ urb->iso_frame_desc[i].actual_length = iso_packet[i].length;
+ urb->actual_length += urb->iso_frame_desc[i].actual_length;
+ } else {
+ dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%d submit=%d size=%d\n",
+ i, urb->number_of_packets,
+ iso_packet[i].status, pipe_handle,
+ submit_handle, iso_packet[i].length);
+ urb->iso_frame_desc[i].status = -EREMOTEIO;
+ }
+ }
+ /* Free the private list now that we don't need it anymore */
+ kfree(iso_packet);
+ urb->setup_packet = NULL;
+ }
- callback(usb, reason, complete_code, pipe_handle, submit_handle,
- bytes_transferred, user_data);
+ switch (status) {
+ case CVMX_USB_COMPLETE_SUCCESS:
+ urb->status = 0;
+ break;
+ case CVMX_USB_COMPLETE_CANCEL:
+ if (urb->status == 0)
+ urb->status = -ENOENT;
+ break;
+ case CVMX_USB_COMPLETE_STALL:
+ dev_dbg(dev, "status=stall pipe=%d submit=%d size=%d\n",
+ pipe_handle, submit_handle, bytes_transferred);
+ urb->status = -EPIPE;
+ break;
+ case CVMX_USB_COMPLETE_BABBLEERR:
+ dev_dbg(dev, "status=babble pipe=%d submit=%d size=%d\n",
+ pipe_handle, submit_handle, bytes_transferred);
+ urb->status = -EPIPE;
+ break;
+ case CVMX_USB_COMPLETE_SHORT:
+ dev_dbg(dev, "status=short pipe=%d submit=%d size=%d\n",
+ pipe_handle, submit_handle, bytes_transferred);
+ urb->status = -EREMOTEIO;
+ break;
+ case CVMX_USB_COMPLETE_ERROR:
+ case CVMX_USB_COMPLETE_XACTERR:
+ case CVMX_USB_COMPLETE_DATATGLERR:
+ case CVMX_USB_COMPLETE_FRAMEERR:
+ dev_dbg(dev, "status=%d pipe=%d submit=%d size=%d\n",
+ status, pipe_handle, submit_handle, bytes_transferred);
+ urb->status = -EPROTO;
+ break;
+ }
+ spin_unlock(&priv->lock);
+ usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status);
+ spin_lock(&priv->lock);
}
-
/**
* Signal the completion of a transaction and free it. The
* transaction will be removed from the pipe transaction list.
@@ -2234,6 +2249,9 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb,
struct cvmx_usb_transaction *transaction,
enum cvmx_usb_complete complete_code)
{
+ int pipe_handle;
+ int submit_handle;
+
/* If this was a split then clear our split in progress marker */
if (usb->active_split == transaction)
usb->active_split = NULL;
@@ -2277,9 +2295,12 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb,
__cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
}
- __cvmx_usb_perform_callback(usb, pipe, transaction,
- CVMX_USB_CALLBACK_TRANSFER_COMPLETE,
- complete_code);
+ pipe_handle = __cvmx_usb_get_pipe_handle(usb, pipe);
+ submit_handle = __cvmx_usb_get_submit_handle(usb, transaction);
+ octeon_usb_urb_complete_callback(usb, complete_code, pipe_handle,
+ submit_handle,
+ transaction->actual_bytes,
+ transaction->callback_data);
__cvmx_usb_free_transaction(usb, transaction);
done:
return;
@@ -2305,7 +2326,6 @@ done:
* For ISO, the number of packet in the transaction.
* @iso_packets:
* A description of each ISO packet
- * @callback: User callback to call when the transaction completes
* @user_data: User's data for the callback
*
* Returns: Submit handle or negative on failure. Matches the result
@@ -2320,7 +2340,6 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
int iso_start_frame,
int iso_number_packets,
struct cvmx_usb_iso_packet *iso_packets,
- cvmx_usb_callback_func_t callback,
void *user_data)
{
int submit_handle;
@@ -2347,7 +2366,6 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
transaction->iso_start_frame = iso_start_frame;
transaction->iso_number_packets = iso_number_packets;
transaction->iso_packets = iso_packets;
- transaction->callback = callback;
transaction->callback_data = user_data;
if (transaction->type == CVMX_USB_TRANSFER_CONTROL)
transaction->stage = CVMX_USB_STAGE_SETUP;
@@ -2392,23 +2410,14 @@ static int __cvmx_usb_submit_transaction(struct cvmx_usb_state *usb,
* zero.
* @buffer_length:
* Length of buffer in bytes.
- * @callback: Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then there is no way to know when a transaction
- * completes.
* @user_data: User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
+ * callback is called.
*
* Returns: A submitted transaction handle or negative on
* failure. Negative values are error codes.
*/
static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb, int pipe_handle,
uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
void *user_data)
{
int submit_handle;
@@ -2427,7 +2436,6 @@ static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb, int pipe_handle,
0, /* iso_start_frame */
0, /* iso_number_packets */
NULL, /* iso_packets */
- callback,
user_data);
return submit_handle;
}
@@ -2446,25 +2454,15 @@ static int cvmx_usb_submit_bulk(struct cvmx_usb_state *usb, int pipe_handle,
* zero.
* @buffer_length:
* Length of buffer in bytes.
- * @callback: Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then there is no way to know when a transaction
- * completes.
* @user_data: User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
+ * callback is called.
*
* Returns: A submitted transaction handle or negative on
* failure. Negative values are error codes.
*/
static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,
int pipe_handle, uint64_t buffer,
- int buffer_length,
- cvmx_usb_callback_func_t callback,
- void *user_data)
+ int buffer_length, void *user_data)
{
int submit_handle;
@@ -2482,7 +2480,6 @@ static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,
0, /* iso_start_frame */
0, /* iso_number_packets */
NULL, /* iso_packets */
- callback,
user_data);
return submit_handle;
}
@@ -2505,16 +2502,8 @@ static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,
* zero.
* @buffer_length:
* Length of buffer in bytes.
- * @callback: Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then there is no way to know when a transaction
- * completes.
* @user_data: User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
+ * callback is called.
*
* Returns: A submitted transaction handle or negative on
* failure. Negative values are error codes.
@@ -2522,7 +2511,6 @@ static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,
static int cvmx_usb_submit_control(struct cvmx_usb_state *usb,
int pipe_handle, uint64_t control_header,
uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
void *user_data)
{
int submit_handle;
@@ -2548,7 +2536,6 @@ static int cvmx_usb_submit_control(struct cvmx_usb_state *usb,
0, /* iso_start_frame */
0, /* iso_number_packets */
NULL, /* iso_packets */
- callback,
user_data);
return submit_handle;
}
@@ -2578,16 +2565,8 @@ static int cvmx_usb_submit_control(struct cvmx_usb_state *usb,
* zero.
* @buffer_length:
* Length of buffer in bytes.
- * @callback: Function to call when this transaction
- * completes. If the return value of this
- * function isn't an error, then this function
- * is guaranteed to be called when the
- * transaction completes. If this parameter is
- * NULL, then there is no way to know when a transaction
- * completes.
* @user_data: User supplied data returned when the
- * callback is called. This is only used if
- * callback in not NULL.
+ * callback is called.
*
* Returns: A submitted transaction handle or negative on
* failure. Negative values are error codes.
@@ -2597,7 +2576,6 @@ static int cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb,
int number_packets, struct
cvmx_usb_iso_packet packets[],
uint64_t buffer, int buffer_length,
- cvmx_usb_callback_func_t callback,
void *user_data)
{
int submit_handle;
@@ -2622,7 +2600,6 @@ static int cvmx_usb_submit_isochronous(struct cvmx_usb_state *usb,
start_frame,
number_packets,
packets,
- callback,
user_data);
return submit_handle;
}
@@ -3217,16 +3194,6 @@ static int __cvmx_usb_poll_channel(struct cvmx_usb_state *usb, int channel)
return 0;
}
-static inline struct octeon_hcd *cvmx_usb_to_octeon(struct cvmx_usb_state *p)
-{
- return container_of(p, struct octeon_hcd, usb);
-}
-
-static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p)
-{
- return container_of((void *)p, struct usb_hcd, hcd_priv);
-}
-
static void octeon_usb_port_callback(struct cvmx_usb_state *usb)
{
struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
@@ -3372,101 +3339,6 @@ static int octeon_usb_get_frame_number(struct usb_hcd *hcd)
return cvmx_usb_get_frame_number(&priv->usb);
}
-static void octeon_usb_urb_complete_callback(struct cvmx_usb_state *usb,
- enum cvmx_usb_callback reason,
- enum cvmx_usb_complete status,
- int pipe_handle,
- int submit_handle,
- int bytes_transferred,
- void *user_data)
-{
- struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
- struct usb_hcd *hcd = octeon_to_hcd(priv);
- struct device *dev = hcd->self.controller;
- struct urb *urb = user_data;
-
- urb->actual_length = bytes_transferred;
- urb->hcpriv = NULL;
-
- if (!list_empty(&urb->urb_list)) {
- /*
- * It is on the dequeue_list, but we are going to call
- * usb_hcd_giveback_urb(), so we must clear it from
- * the list. We got to it before the
- * octeon_usb_urb_dequeue_work() tasklet did.
- */
- list_del(&urb->urb_list);
- /* No longer on the dequeue_list. */
- INIT_LIST_HEAD(&urb->urb_list);
- }
-
- /* For Isochronous transactions we need to update the URB packet status
- list from data in our private copy */
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- int i;
- /*
- * The pointer to the private list is stored in the setup_packet
- * field.
- */
- struct cvmx_usb_iso_packet *iso_packet =
- (struct cvmx_usb_iso_packet *) urb->setup_packet;
- /* Recalculate the transfer size by adding up each packet */
- urb->actual_length = 0;
- for (i = 0; i < urb->number_of_packets; i++) {
- if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) {
- urb->iso_frame_desc[i].status = 0;
- urb->iso_frame_desc[i].actual_length = iso_packet[i].length;
- urb->actual_length += urb->iso_frame_desc[i].actual_length;
- } else {
- dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%d submit=%d size=%d\n",
- i, urb->number_of_packets,
- iso_packet[i].status, pipe_handle,
- submit_handle, iso_packet[i].length);
- urb->iso_frame_desc[i].status = -EREMOTEIO;
- }
- }
- /* Free the private list now that we don't need it anymore */
- kfree(iso_packet);
- urb->setup_packet = NULL;
- }
-
- switch (status) {
- case CVMX_USB_COMPLETE_SUCCESS:
- urb->status = 0;
- break;
- case CVMX_USB_COMPLETE_CANCEL:
- if (urb->status == 0)
- urb->status = -ENOENT;
- break;
- case CVMX_USB_COMPLETE_STALL:
- dev_dbg(dev, "status=stall pipe=%d submit=%d size=%d\n",
- pipe_handle, submit_handle, bytes_transferred);
- urb->status = -EPIPE;
- break;
- case CVMX_USB_COMPLETE_BABBLEERR:
- dev_dbg(dev, "status=babble pipe=%d submit=%d size=%d\n",
- pipe_handle, submit_handle, bytes_transferred);
- urb->status = -EPIPE;
- break;
- case CVMX_USB_COMPLETE_SHORT:
- dev_dbg(dev, "status=short pipe=%d submit=%d size=%d\n",
- pipe_handle, submit_handle, bytes_transferred);
- urb->status = -EREMOTEIO;
- break;
- case CVMX_USB_COMPLETE_ERROR:
- case CVMX_USB_COMPLETE_XACTERR:
- case CVMX_USB_COMPLETE_DATATGLERR:
- case CVMX_USB_COMPLETE_FRAMEERR:
- dev_dbg(dev, "status=%d pipe=%d submit=%d size=%d\n",
- status, pipe_handle, submit_handle, bytes_transferred);
- urb->status = -EPROTO;
- break;
- }
- spin_unlock(&priv->lock);
- usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status);
- spin_lock(&priv->lock);
-}
-
static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
struct urb *urb,
gfp_t mem_flags)
@@ -3595,7 +3467,6 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
iso_packet,
urb->transfer_dma,
urb->transfer_buffer_length,
- octeon_usb_urb_complete_callback,
urb);
/*
* If submit failed we need to free our private packet
@@ -3613,7 +3484,6 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
submit_handle = cvmx_usb_submit_interrupt(&priv->usb, pipe_handle,
urb->transfer_dma,
urb->transfer_buffer_length,
- octeon_usb_urb_complete_callback,
urb);
break;
case PIPE_CONTROL:
@@ -3623,7 +3493,6 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
urb->setup_dma,
urb->transfer_dma,
urb->transfer_buffer_length,
- octeon_usb_urb_complete_callback,
urb);
break;
case PIPE_BULK:
@@ -3632,7 +3501,6 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
submit_handle = cvmx_usb_submit_bulk(&priv->usb, pipe_handle,
urb->transfer_dma,
urb->transfer_buffer_length,
- octeon_usb_urb_complete_callback,
urb);
break;
}

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