Rather than using usb_interrupt_msg() to receive responses, reuse the
urb callback we already have in place.
Signed-off-by: Sean Young <sean@xxxxxxxx>
---
drivers/media/rc/iguanair.c | 147 +++++++++++++++++---------------------------
1 file changed, 56 insertions(+), 91 deletions(-)
diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c
index 5e2eaf8..bdd526d 100644
--- a/drivers/media/rc/iguanair.c
+++ b/drivers/media/rc/iguanair.c
@@ -35,7 +35,7 @@ struct iguanair {
struct device *dev;
struct usb_device *udev;
- int pipe_in, pipe_out;
+ int pipe_out;
uint8_t bufsize;
uint8_t version[2];
@@ -82,11 +82,6 @@ struct packet {
uint8_t cmd;
};
-struct response_packet {
- struct packet header;
- uint8_t data[4];
-};
-
struct send_packet {
struct packet header;
uint8_t length;
@@ -100,6 +95,26 @@ static void process_ir_data(struct iguanair *ir, unsigned len)
{
if (len >= 4 && ir->buf_in[0] == 0 && ir->buf_in[1] == 0) {
switch (ir->buf_in[3]) {
+ case CMD_GET_VERSION:
+ if (len == 6) {
+ ir->version[0] = ir->buf_in[4];
+ ir->version[1] = ir->buf_in[5];
+ complete(&ir->completion);
+ }
+ break;
+ case CMD_GET_BUFSIZE:
+ if (len >= 5) {
+ ir->bufsize = ir->buf_in[4];
+ complete(&ir->completion);
+ }
+ break;
+ case CMD_GET_FEATURES:
+ if (len > 5) {
+ if (ir->version[0] >= 4)
+ ir->cycle_overhead = ir->buf_in[5];
+ complete(&ir->completion);
+ }
+ break;
case CMD_TX_OVERFLOW:
ir->tx_overflow = true;
case CMD_RECEIVER_OFF:
@@ -169,31 +184,22 @@ static void iguanair_rx(struct urb *urb)
usb_submit_urb(urb, GFP_ATOMIC);
}
-static int iguanair_send(struct iguanair *ir, void *data, unsigned size,
- struct response_packet *response, unsigned *res_len)
+static int iguanair_send(struct iguanair *ir, void *data, unsigned size)
{
- unsigned offset, len;
int rc, transferred;
- for (offset = 0; offset < size; offset += MAX_PACKET_SIZE) {
- len = min(size - offset, MAX_PACKET_SIZE);
-
- if (ir->tx_overflow)
- return -EOVERFLOW;
+ INIT_COMPLETION(ir->completion);
- rc = usb_interrupt_msg(ir->udev, ir->pipe_out, data + offset,
- len, &transferred, TIMEOUT);
- if (rc)
- return rc;
+ rc = usb_interrupt_msg(ir->udev, ir->pipe_out, data, size,
+ &transferred, TIMEOUT);
+ if (rc)
+ return rc;
- if (transferred != len)
- return -EIO;
- }
+ if (transferred != size)
+ return -EIO;
- if (response) {
- rc = usb_interrupt_msg(ir->udev, ir->pipe_in, response,
- sizeof(*response), res_len, TIMEOUT);
- }
+ if (wait_for_completion_timeout(&ir->completion, TIMEOUT) == 0)
+ return -ETIMEDOUT;
return rc;
}
@@ -201,66 +207,40 @@ static int iguanair_send(struct iguanair *ir, void *data, unsigned size,
static int iguanair_get_features(struct iguanair *ir)
{
struct packet packet;
- struct response_packet response;
- int rc, len;
+ int rc;
packet.start = 0;
packet.direction = DIR_OUT;
packet.cmd = CMD_GET_VERSION;
- rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
+ rc = iguanair_send(ir, &packet, sizeof(packet));
if (rc) {
dev_info(ir->dev, "failed to get version\n");
goto out;
}
- if (len != 6) {
- dev_info(ir->dev, "failed to get version\n");
- rc = -EIO;
- goto out;
- }
-
- ir->version[0] = response.data[0];
- ir->version[1] = response.data[1];
ir->bufsize = 150;
ir->cycle_overhead = 65;
packet.cmd = CMD_GET_BUFSIZE;
- rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
+ rc = iguanair_send(ir, &packet, sizeof(packet));
if (rc) {
dev_info(ir->dev, "failed to get buffer size\n");
goto out;
}
- if (len != 5) {
- dev_info(ir->dev, "failed to get buffer size\n");
- rc = -EIO;
- goto out;
- }
-
- ir->bufsize = response.data[0];
-
if (ir->version[0] == 0 || ir->version[1] == 0)
goto out;
packet.cmd = CMD_GET_FEATURES;
- rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
+ rc = iguanair_send(ir, &packet, sizeof(packet));
if (rc) {
dev_info(ir->dev, "failed to get features\n");
goto out;
}
- if (len < 5) {
- dev_info(ir->dev, "failed to get features\n");
- rc = -EIO;
- goto out;
- }
-
- if (len > 5 && ir->version[0] >= 4)
- ir->cycle_overhead = response.data[1];
-
out:
return rc;
}
@@ -269,17 +249,8 @@ static int iguanair_receiver(struct iguanair *ir, bool enable)
{
struct packet packet = { 0, DIR_OUT, enable ?
CMD_RECEIVER_ON : CMD_RECEIVER_OFF };
- int rc;
-
- INIT_COMPLETION(ir->completion);
-
- rc = iguanair_send(ir, &packet, sizeof(packet), NULL, NULL);
- if (rc)
- return rc;
-
- wait_for_completion_timeout(&ir->completion, TIMEOUT);
- return 0;
+ return iguanair_send(ir, &packet, sizeof(packet));
}
/*
@@ -406,17 +377,10 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count)
ir->tx_overflow = false;
- INIT_COMPLETION(ir->completion);
-
- rc = iguanair_send(ir, packet, size + 8, NULL, NULL);
+ rc = iguanair_send(ir, packet, size + 8);
- if (rc == 0) {
- wait_for_completion_timeout(&ir->completion, TIMEOUT);
- if (ir->tx_overflow)
- rc = -EOVERFLOW;
- }
-
- ir->tx_overflow = false;
+ if (rc == 0 && ir->tx_overflow)
+ rc = -EOVERFLOW;
if (ir->receiver_on) {
if (iguanair_receiver(ir, true))
@@ -437,8 +401,6 @@ static int iguanair_open(struct rc_dev *rdev)
mutex_lock(&ir->lock);
- usb_submit_urb(ir->urb_in, GFP_KERNEL);
-
BUG_ON(ir->receiver_on);
rc = iguanair_receiver(ir, true);
@@ -462,8 +424,6 @@ static void iguanair_close(struct rc_dev *rdev)
if (rc)
dev_warn(ir->dev, "failed to disable receiver: %d\n", rc);
- usb_kill_urb(ir->urb_in);
-
mutex_unlock(&ir->lock);
}
@@ -473,7 +433,7 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
struct usb_device *udev = interface_to_usbdev(intf);
struct iguanair *ir;
struct rc_dev *rc;
- int ret;
+ int ret, pipein;
struct usb_host_interface *idesc;
ir = kzalloc(sizeof(*ir), GFP_KERNEL);
@@ -483,7 +443,7 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
goto out;
}
- ir->buf_in = usb_alloc_coherent(udev, MAX_PACKET_SIZE, GFP_ATOMIC,
+ ir->buf_in = usb_alloc_coherent(udev, MAX_PACKET_SIZE, GFP_KERNEL,
&ir->dma_in);
ir->urb_in = usb_alloc_urb(0, GFP_KERNEL);
@@ -502,25 +462,28 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
ir->rc = rc;
ir->dev = &intf->dev;
ir->udev = udev;
- ir->pipe_in = usb_rcvintpipe(udev,
- idesc->endpoint[0].desc.bEndpointAddress);
ir->pipe_out = usb_sndintpipe(udev,
idesc->endpoint[1].desc.bEndpointAddress);
mutex_init(&ir->lock);
init_completion(&ir->completion);
- ret = iguanair_get_features(ir);
- if (ret) {
- dev_warn(&intf->dev, "failed to get device features");
- goto out;
- }
-
- usb_fill_int_urb(ir->urb_in, ir->udev, ir->pipe_in, ir->buf_in,
+ pipein = usb_rcvintpipe(udev, idesc->endpoint[0].desc.bEndpointAddress);
+ usb_fill_int_urb(ir->urb_in, udev, pipein, ir->buf_in,
MAX_PACKET_SIZE, iguanair_rx, ir,
idesc->endpoint[0].desc.bInterval);
ir->urb_in->transfer_dma = ir->dma_in;
ir->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ ret = usb_submit_urb(ir->urb_in, GFP_KERNEL);
+ if (ret) {
+ dev_warn(&intf->dev, "failed to submit urb: %d\n", ret);
+ goto out;
+ }
+
+ ret = iguanair_get_features(ir);
+ if (ret)
+ goto out2;
+
snprintf(ir->name, sizeof(ir->name),
"IguanaWorks USB IR Transceiver version %d.%d",
ir->version[0], ir->version[1]);
@@ -547,7 +510,7 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
ret = rc_register_device(rc);
if (ret < 0) {
dev_err(&intf->dev, "failed to register rc device %d", ret);
- goto out;
+ goto out2;
}
usb_set_intfdata(intf, ir);
@@ -555,6 +518,8 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
dev_info(&intf->dev, "Registered %s", ir->name);
return 0;
+out2:
+ usb_kill_urb(ir->urb_in);
out:
if (ir) {
usb_free_urb(ir->urb_in);
--
1.7.11.2
--
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