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authorRafi Rubin <rafi@seas.upenn.edu>2010-09-08 11:46:14 +0200
committerJiri Kosina <jkosina@suse.cz>2010-09-08 11:46:19 +0200
commit0277873c05158c5efc97c23d52e6aec6250bde0f (patch)
treed46a1fa5104b5905cf9aea48fdf7bfbf2df2b099 /drivers/hid/hid-ntrig.c
parenta52dc34c0eea991115a9d789e9461f06768fa360 (diff)
downloadlinux-2.6.38-lt-ux500-0277873c05158c5efc97c23d52e6aec6250bde0f.tar.gz
HID: ntrig: identify firmware version
This adds firmware version polling to the end of probe and reports the version both in the raw form and proccessed to match the formatting used by N-Trig. Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-ntrig.c')
-rw-r--r--drivers/hid/hid-ntrig.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
index 43e95dee929..69169efa1e1 100644
--- a/drivers/hid/hid-ntrig.c
+++ b/drivers/hid/hid-ntrig.c
@@ -90,6 +90,55 @@ struct ntrig_data {
};
+/*
+ * This function converts the 4 byte raw firmware code into
+ * a string containing 5 comma separated numbers.
+ */
+static int ntrig_version_string(unsigned char *raw, char *buf)
+{
+ __u8 a = (raw[1] & 0x0e) >> 1;
+ __u8 b = (raw[0] & 0x3c) >> 2;
+ __u8 c = ((raw[0] & 0x03) << 3) | ((raw[3] & 0xe0) >> 5);
+ __u8 d = ((raw[3] & 0x07) << 3) | ((raw[2] & 0xe0) >> 5);
+ __u8 e = raw[2] & 0x07;
+
+ /*
+ * As yet unmapped bits:
+ * 0b11000000 0b11110001 0b00011000 0b00011000
+ */
+
+ return sprintf(buf, "%u.%u.%u.%u.%u", a, b, c, d, e);
+}
+
+static void ntrig_report_version(struct hid_device *hdev)
+{
+ int ret;
+ char buf[20];
+ struct usb_device *usb_dev = hid_to_usb_dev(hdev);
+ unsigned char *data = kmalloc(8, GFP_KERNEL);
+
+ if (!data)
+ goto err_free;
+
+ ret = usb_control_msg(usb_dev, usb_rcvctrlpipe(usb_dev, 0),
+ USB_REQ_CLEAR_FEATURE,
+ USB_TYPE_CLASS | USB_RECIP_INTERFACE |
+ USB_DIR_IN,
+ 0x30c, 1, data, 8,
+ USB_CTRL_SET_TIMEOUT);
+
+ if (ret == 8) {
+ ret = ntrig_version_string(&data[2], buf);
+
+ dev_info(&hdev->dev,
+ "Firmware version: %s (%02x%02x %02x%02x)\n",
+ buf, data[2], data[3], data[4], data[5]);
+ }
+
+err_free:
+ kfree(data);
+}
+
static ssize_t show_phys_width(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -848,6 +897,8 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
if (report)
usbhid_submit_report(hdev, report, USB_DIR_OUT);
+ ntrig_report_version(hdev);
+
ret = sysfs_create_group(&hdev->dev.kobj,
&ntrig_attribute_group);