These patches implement a modification of the USBTMC
protocol to allow operation with Rigol equipment. Rigol requires that a
single TMC request to receive any buffer size and bulk requests to get the
data. The original algorithm sends a TMC request for each subset of the data
(a single USB transaction). The modification is only active for Rigol
equipment, vendor and product set is contained in the array usbtmc_id_quirk.
This patch creates the rigol_quirk variable and the arrays for the
idvendor and idproduct.
Signed-off-by: Alexandre Peixoto Ferreira <alexandref75@xxxxxxxxx>
---
drivers/usb/class/usbtmc.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 4c5506a..c450b04 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -31,6 +31,8 @@
#include <linux/usb/tmc.h>
+#define RIGOL 1
+#define USBTMC_HEADER_SIZE 12
#define USBTMC_MINOR_BASE 176
/*
@@ -84,6 +86,8 @@ struct usbtmc_device_data {
u8 bTag_last_write; /* needed for abort */
u8 bTag_last_read; /* needed for abort */
+ u8 rigol_quirk;
+
/* attributes from the USB TMC spec for this device */
u8 TermChar;
bool TermCharEnabled;
@@ -97,6 +101,16 @@ struct usbtmc_device_data {
};
#define to_usbtmc_data(d) container_of(d, struct usbtmc_device_data, kref)
+struct usbtmc_ID_rigol_quirk {
+ __u16 idVendor;
+ __u16 idProduct;
+};
+
+static const struct usbtmc_ID_rigol_quirk usbtmc_id_quirk[] = {
+ { 0x1ab1, 0x0588 },
+ { 0, 0 }
+};
+
/* Forward declarations */
static struct usb_driver usbtmc_driver;
--
1.8.2.1
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