mirror of https://gitee.com/openkylin/linux.git
[media] iguanair: reuse existing urb callback for command responses
Rather than using usb_interrupt_msg() to receive responses, reuse the urb callback we already have in place. Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sean Young
Mauro Carvalho Chehab
parent
c6afbf298b
commit
e99a7cfe93
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@ -35,7 +35,7 @@ struct iguanair {
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struct device *dev;
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struct usb_device *udev;
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int pipe_in, pipe_out;
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int pipe_out;
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uint8_t bufsize;
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uint8_t version[2];
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@ -82,11 +82,6 @@ struct packet {
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uint8_t cmd;
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};
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struct response_packet {
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struct packet header;
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uint8_t data[4];
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};
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struct send_packet {
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struct packet header;
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uint8_t length;
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@ -100,6 +95,26 @@ static void process_ir_data(struct iguanair *ir, unsigned len)
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{
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if (len >= 4 && ir->buf_in[0] == 0 && ir->buf_in[1] == 0) {
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switch (ir->buf_in[3]) {
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case CMD_GET_VERSION:
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if (len == 6) {
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ir->version[0] = ir->buf_in[4];
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ir->version[1] = ir->buf_in[5];
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complete(&ir->completion);
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}
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break;
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case CMD_GET_BUFSIZE:
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if (len >= 5) {
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ir->bufsize = ir->buf_in[4];
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complete(&ir->completion);
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}
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break;
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case CMD_GET_FEATURES:
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if (len > 5) {
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if (ir->version[0] >= 4)
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ir->cycle_overhead = ir->buf_in[5];
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complete(&ir->completion);
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}
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break;
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case CMD_TX_OVERFLOW:
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ir->tx_overflow = true;
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case CMD_RECEIVER_OFF:
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@ -169,31 +184,22 @@ static void iguanair_rx(struct urb *urb)
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usb_submit_urb(urb, GFP_ATOMIC);
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}
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static int iguanair_send(struct iguanair *ir, void *data, unsigned size,
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struct response_packet *response, unsigned *res_len)
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static int iguanair_send(struct iguanair *ir, void *data, unsigned size)
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{
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unsigned offset, len;
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int rc, transferred;
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for (offset = 0; offset < size; offset += MAX_PACKET_SIZE) {
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len = min(size - offset, MAX_PACKET_SIZE);
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INIT_COMPLETION(ir->completion);
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if (ir->tx_overflow)
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return -EOVERFLOW;
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rc = usb_interrupt_msg(ir->udev, ir->pipe_out, data, size,
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&transferred, TIMEOUT);
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if (rc)
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return rc;
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rc = usb_interrupt_msg(ir->udev, ir->pipe_out, data + offset,
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len, &transferred, TIMEOUT);
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if (rc)
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return rc;
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if (transferred != size)
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return -EIO;
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if (transferred != len)
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return -EIO;
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}
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if (response) {
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rc = usb_interrupt_msg(ir->udev, ir->pipe_in, response,
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sizeof(*response), res_len, TIMEOUT);
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}
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if (wait_for_completion_timeout(&ir->completion, TIMEOUT) == 0)
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return -ETIMEDOUT;
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return rc;
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}
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@ -201,66 +207,40 @@ static int iguanair_send(struct iguanair *ir, void *data, unsigned size,
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static int iguanair_get_features(struct iguanair *ir)
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{
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struct packet packet;
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struct response_packet response;
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int rc, len;
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int rc;
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packet.start = 0;
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packet.direction = DIR_OUT;
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packet.cmd = CMD_GET_VERSION;
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rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
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rc = iguanair_send(ir, &packet, sizeof(packet));
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if (rc) {
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dev_info(ir->dev, "failed to get version\n");
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goto out;
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}
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if (len != 6) {
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dev_info(ir->dev, "failed to get version\n");
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rc = -EIO;
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goto out;
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}
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ir->version[0] = response.data[0];
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ir->version[1] = response.data[1];
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ir->bufsize = 150;
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ir->cycle_overhead = 65;
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packet.cmd = CMD_GET_BUFSIZE;
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rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
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rc = iguanair_send(ir, &packet, sizeof(packet));
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if (rc) {
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dev_info(ir->dev, "failed to get buffer size\n");
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goto out;
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}
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if (len != 5) {
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dev_info(ir->dev, "failed to get buffer size\n");
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rc = -EIO;
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goto out;
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}
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ir->bufsize = response.data[0];
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if (ir->version[0] == 0 || ir->version[1] == 0)
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goto out;
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packet.cmd = CMD_GET_FEATURES;
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rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
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rc = iguanair_send(ir, &packet, sizeof(packet));
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if (rc) {
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dev_info(ir->dev, "failed to get features\n");
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goto out;
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}
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if (len < 5) {
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dev_info(ir->dev, "failed to get features\n");
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rc = -EIO;
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goto out;
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}
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if (len > 5 && ir->version[0] >= 4)
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ir->cycle_overhead = response.data[1];
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out:
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return rc;
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}
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@ -269,17 +249,8 @@ static int iguanair_receiver(struct iguanair *ir, bool enable)
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{
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struct packet packet = { 0, DIR_OUT, enable ?
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CMD_RECEIVER_ON : CMD_RECEIVER_OFF };
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int rc;
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INIT_COMPLETION(ir->completion);
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rc = iguanair_send(ir, &packet, sizeof(packet), NULL, NULL);
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if (rc)
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return rc;
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wait_for_completion_timeout(&ir->completion, TIMEOUT);
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return 0;
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return iguanair_send(ir, &packet, sizeof(packet));
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}
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/*
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@ -406,17 +377,10 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count)
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ir->tx_overflow = false;
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INIT_COMPLETION(ir->completion);
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rc = iguanair_send(ir, packet, size + 8);
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rc = iguanair_send(ir, packet, size + 8, NULL, NULL);
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if (rc == 0) {
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wait_for_completion_timeout(&ir->completion, TIMEOUT);
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if (ir->tx_overflow)
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rc = -EOVERFLOW;
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}
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ir->tx_overflow = false;
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if (rc == 0 && ir->tx_overflow)
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rc = -EOVERFLOW;
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if (ir->receiver_on) {
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if (iguanair_receiver(ir, true))
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@ -437,8 +401,6 @@ static int iguanair_open(struct rc_dev *rdev)
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mutex_lock(&ir->lock);
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usb_submit_urb(ir->urb_in, GFP_KERNEL);
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BUG_ON(ir->receiver_on);
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rc = iguanair_receiver(ir, true);
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@ -462,8 +424,6 @@ static void iguanair_close(struct rc_dev *rdev)
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if (rc)
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dev_warn(ir->dev, "failed to disable receiver: %d\n", rc);
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usb_kill_urb(ir->urb_in);
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mutex_unlock(&ir->lock);
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}
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@ -473,7 +433,7 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
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struct usb_device *udev = interface_to_usbdev(intf);
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struct iguanair *ir;
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struct rc_dev *rc;
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int ret;
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int ret, pipein;
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struct usb_host_interface *idesc;
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ir = kzalloc(sizeof(*ir), GFP_KERNEL);
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@ -483,7 +443,7 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
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goto out;
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}
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ir->buf_in = usb_alloc_coherent(udev, MAX_PACKET_SIZE, GFP_ATOMIC,
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ir->buf_in = usb_alloc_coherent(udev, MAX_PACKET_SIZE, GFP_KERNEL,
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&ir->dma_in);
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ir->urb_in = usb_alloc_urb(0, GFP_KERNEL);
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@ -502,25 +462,28 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
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ir->rc = rc;
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ir->dev = &intf->dev;
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ir->udev = udev;
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ir->pipe_in = usb_rcvintpipe(udev,
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idesc->endpoint[0].desc.bEndpointAddress);
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ir->pipe_out = usb_sndintpipe(udev,
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idesc->endpoint[1].desc.bEndpointAddress);
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mutex_init(&ir->lock);
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init_completion(&ir->completion);
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ret = iguanair_get_features(ir);
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if (ret) {
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dev_warn(&intf->dev, "failed to get device features");
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goto out;
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}
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usb_fill_int_urb(ir->urb_in, ir->udev, ir->pipe_in, ir->buf_in,
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pipein = usb_rcvintpipe(udev, idesc->endpoint[0].desc.bEndpointAddress);
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usb_fill_int_urb(ir->urb_in, udev, pipein, ir->buf_in,
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MAX_PACKET_SIZE, iguanair_rx, ir,
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idesc->endpoint[0].desc.bInterval);
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ir->urb_in->transfer_dma = ir->dma_in;
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ir->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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ret = usb_submit_urb(ir->urb_in, GFP_KERNEL);
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if (ret) {
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dev_warn(&intf->dev, "failed to submit urb: %d\n", ret);
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goto out;
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}
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ret = iguanair_get_features(ir);
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if (ret)
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goto out2;
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snprintf(ir->name, sizeof(ir->name),
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"IguanaWorks USB IR Transceiver version %d.%d",
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ir->version[0], ir->version[1]);
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@ -547,7 +510,7 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
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ret = rc_register_device(rc);
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if (ret < 0) {
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dev_err(&intf->dev, "failed to register rc device %d", ret);
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goto out;
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goto out2;
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}
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usb_set_intfdata(intf, ir);
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@ -555,6 +518,8 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
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dev_info(&intf->dev, "Registered %s", ir->name);
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return 0;
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out2:
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usb_kill_urb(ir->urb_in);
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out:
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if (ir) {
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usb_free_urb(ir->urb_in);
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