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Groups > linux.kernel > #1267113
| From | Dave Penkler <dpenkler@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v3 4/5] Add ioctl to retrieve USBTMC-USB488 capabilities |
| Date | 2015-11-11 12:30 +0100 |
| Message-ID | <qtBLb-27c-7@gated-at.bofh.it> (permalink) |
| References | <qtBrQ-20m-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
This is a convenience function to obtain an instrument's capabilities
from its file descriptor without having to access sysfs from the user
program.
Signed-off-by: Dave Penkler <dpenkler@gmail.com>
---
drivers/usb/class/usbtmc.c | 12 ++++++++++++
include/uapi/linux/usb/tmc.h | 21 ++++++++++++++++++---
2 files changed, 30 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index bb9a6ab..deca4b5 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -103,6 +103,9 @@ struct usbtmc_device_data {
u16 iin_wMaxPacketSize;
atomic_t srq_asserted;
+ /* coalesced usb488_caps from usbtmc_dev_capabilities */
+ u8 usb488_caps;
+
u8 rigol_quirk;
/* attributes from the USB TMC spec for this device */
@@ -1001,6 +1004,7 @@ static int get_capabilities(struct usbtmc_device_data *data)
data->capabilities.device_capabilities = buffer[5];
data->capabilities.usb488_interface_capabilities = buffer[14];
data->capabilities.usb488_device_capabilities = buffer[15];
+ data->usb488_caps = (buffer[14] & 0x07) | ((buffer[15] & 0x0f) << 4);
rv = 0;
err_out:
@@ -1176,6 +1180,14 @@ static long usbtmc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
retval = usbtmc_ioctl_abort_bulk_in(data);
break;
+ case USBTMC488_IOCTL_GET_CAPS:
+ retval = copy_to_user((void __user *)arg,
+ &data->usb488_caps,
+ sizeof(data->usb488_caps));
+ if (retval)
+ retval = -EFAULT;
+ break;
+
case USBTMC488_IOCTL_READ_STB:
retval = usbtmc488_ioctl_read_stb(data, arg);
break;
diff --git a/include/uapi/linux/usb/tmc.h b/include/uapi/linux/usb/tmc.h
index 49060ea..2606664 100644
--- a/include/uapi/linux/usb/tmc.h
+++ b/include/uapi/linux/usb/tmc.h
@@ -2,12 +2,14 @@
* Copyright (C) 2007 Stefan Kopp, Gechingen, Germany
* Copyright (C) 2008 Novell, Inc.
* Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (C) 2015 Dave Penkler <dpenkler@gmail.com>
*
* This file holds USB constants defined by the USB Device Class
- * Definition for Test and Measurement devices published by the USB-IF.
+ * and USB488 Subclass Definitions for Test and Measurement devices
+ * published by the USB-IF.
*
- * It also has the ioctl definitions for the usbtmc kernel driver that
- * userspace needs to know about.
+ * It also has the ioctl and capability definitions for the
+ * usbtmc kernel driver that userspace needs to know about.
*/
#ifndef __LINUX_USB_TMC_H
@@ -40,6 +42,19 @@
#define USBTMC_IOCTL_ABORT_BULK_IN _IO(USBTMC_IOC_NR, 4)
#define USBTMC_IOCTL_CLEAR_OUT_HALT _IO(USBTMC_IOC_NR, 6)
#define USBTMC_IOCTL_CLEAR_IN_HALT _IO(USBTMC_IOC_NR, 7)
+#define USBTMC488_IOCTL_GET_CAPS _IO(USBTMC_IOC_NR, 17)
#define USBTMC488_IOCTL_READ_STB _IOR(USBTMC_IOC_NR, 18, unsigned char)
+/* Driver encoded usb488 capabilities */
+#define USBTMC488_CAPABILITY_TRIGGER 1
+#define USBTMC488_CAPABILITY_SIMPLE 2
+#define USBTMC488_CAPABILITY_REN_CONTROL 2
+#define USBTMC488_CAPABILITY_GOTO_LOCAL 2
+#define USBTMC488_CAPABILITY_LOCAL_LOCKOUT 2
+#define USBTMC488_CAPABILITY_488_DOT_2 4
+#define USBTMC488_CAPABILITY_DT1 16
+#define USBTMC488_CAPABILITY_RL1 32
+#define USBTMC488_CAPABILITY_SR1 64
+#define USBTMC488_CAPABILITY_FULL_SCPI 128
+
#endif
--
2.5.1
--
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[PATCH v3 0/5] usb: usbtmc: Add support for missing functions in USBTMC-USB488 spec Dave Penkler <dpenkler@gmail.com> - 2015-11-11 12:10 +0100
[PATCH v3 3/5] Add support for receiving USBTMC USB488 SRQ notifications via poll/select Dave Penkler <dpenkler@gmail.com> - 2015-11-11 12:20 +0100
Re: [PATCH v3 3/5] Add support for receiving USBTMC USB488 SRQ notifications via poll/select Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-11-11 20:10 +0100
[PATCH v3 1/5] Implement an ioctl to support the USMTMC-USB488 READ_STATUS_BYTE operation. Dave Penkler <dpenkler@gmail.com> - 2015-11-11 12:20 +0100
Re: [PATCH v3 1/5] Implement an ioctl to support the USMTMC-USB488 READ_STATUS_BYTE operation. Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-11-11 20:10 +0100
Re: [PATCH v3 1/5] Implement an ioctl to support the USMTMC-USB488 READ_STATUS_BYTE operation. Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2015-11-11 20:50 +0100
Re: [PATCH v3 1/5] Implement an ioctl to support the USMTMC-USB488 READ_STATUS_BYTE operation. Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-11-11 21:00 +0100
Re: [PATCH v3 1/5] Implement an ioctl to support the USMTMC-USB488 READ_STATUS_BYTE operation. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-11-11 22:10 +0100
Re: [PATCH v3 1/5] Implement an ioctl to support the USMTMC-USB488 READ_STATUS_BYTE operation. Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-11-12 10:50 +0100
[PATCH v3 2/5] Add support for USBTMC USB488 SRQ notification with fasync Dave Penkler <dpenkler@gmail.com> - 2015-11-11 12:20 +0100
[PATCH v3 4/5] Add ioctl to retrieve USBTMC-USB488 capabilities Dave Penkler <dpenkler@gmail.com> - 2015-11-11 12:30 +0100
Re: [PATCH v3 4/5] Add ioctl to retrieve USBTMC-USB488 capabilities Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-11-11 20:40 +0100
[PATCH v3 5/5] Add ioctls to enable and disable local controls on an instrument Dave Penkler <dpenkler@gmail.com> - 2015-11-11 12:30 +0100
Re: [PATCH v3 5/5] Add ioctls to enable and disable local controls on an instrument Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-11-11 20:40 +0100
Re: [PATCH v3 5/5] Add ioctls to enable and disable local controls on an instrument Dave Penkler <dpenkler@gmail.com> - 2015-11-13 10:10 +0100
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