Hi,
I need to ask usbtmc device for vendor specific data. What about adding ioctl
which switches MsgIDs to be vendor specific? Or are there other, better,
options? Patch bellow ilustrates changes to allow reading and writing vendor
specific messages.
Thank you,
ladis
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 917a55c..594f74d 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -549,7 +549,7 @@ static int send_request_dev_dep_msg_in(struct usbtmc_device_data *data, size_t t
/* Setup IO buffer for REQUEST_DEV_DEP_MSG_IN message
* Refer to class specs for details
*/
- buffer[0] = 2;
+ buffer[0] = 127;
buffer[1] = data->bTag;
buffer[2] = ~data->bTag;
buffer[3] = 0; /* Reserved */
@@ -677,8 +677,8 @@ static ssize_t usbtmc_read(struct file *filp, char __user *buf,
goto exit;
}
- if (buffer[0] != 2) {
- dev_err(dev, "Device sent reply with wrong MsgID: %u != 2\n", buffer[0]);
+ if (buffer[0] != 127) {
+ dev_err(dev, "Device sent reply with wrong MsgID: %u != 127\n", buffer[0]);
if (data->auto_abort)
usbtmc_ioctl_abort_bulk_in(data);
goto exit;
@@ -807,7 +807,7 @@ static ssize_t usbtmc_write(struct file *filp, const char __user *buf,
}
/* Setup IO buffer for DEV_DEP_MSG_OUT message */
- buffer[0] = 1;
+ buffer[0] = 126;
buffer[1] = data->bTag;
buffer[2] = ~data->bTag;
buffer[3] = 0; /* Reserved */
--
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