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Message-Id: <20180907103450.13890-2-benjamin.tissoires@redhat.com>
Date: Fri, 7 Sep 2018 12:34:44 +0200
From: Benjamin Tissoires <benjamin.tissoires@...hat.com>
To: Jiri Kosina <jikos@...nel.org>,
Nestor Lopez Casado <nlopezcasad@...itech.com>,
Simon Wood <simon@...gewell.org>,
Olivier Gay <ogay@...itech.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: [PATCH 1/7] HID: logitech-hidpp: allow non HID++ devices to be handled by this module
On the gaming mice, there are 2 interfaces, one for the mouse and one
for the macros. Better allow everybody to go through hid-logitech-hidpp
than trying to be smarter.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
---
drivers/hid/hid-logitech-hidpp.c | 77 +++++++++++++++++++++++++++++++++++-----
1 file changed, 69 insertions(+), 8 deletions(-)
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 5f0c080059c6..37abae63bb1a 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -2730,6 +2730,9 @@ static int hidpp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
{
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
+ if (!hidpp)
+ return 0;
+
if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
return wtp_input_mapping(hdev, hi, field, usage, bit, max);
else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560 &&
@@ -2745,6 +2748,9 @@ static int hidpp_input_mapped(struct hid_device *hdev, struct hid_input *hi,
{
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
+ if (!hidpp)
+ return 0;
+
/* Ensure that Logitech G920 is not given a default fuzz/flat value */
if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
if (usage->type == EV_ABS && (usage->code == ABS_X ||
@@ -2778,6 +2784,9 @@ static int hidpp_input_configured(struct hid_device *hdev,
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
struct input_dev *input = hidinput->input;
+ if (!hidpp)
+ return 0;
+
hidpp_populate_input(hidpp, input, true);
return 0;
@@ -2847,6 +2856,9 @@ static int hidpp_raw_event(struct hid_device *hdev, struct hid_report *report,
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
int ret = 0;
+ if (!hidpp)
+ return 0;
+
/* Generic HID++ processing. */
switch (data[0]) {
case REPORT_ID_HIDPP_VERY_LONG:
@@ -2895,7 +2907,13 @@ static int hidpp_event(struct hid_device *hdev, struct hid_field *field,
* restriction imposed in hidpp_usages.
*/
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
- struct hid_scroll_counter *counter = &hidpp->vertical_wheel_counter;
+ struct hid_scroll_counter *counter;
+
+ if (!hidpp)
+ return 0;
+
+ counter = &hidpp->vertical_wheel_counter;
+
/* A scroll event may occur before the multiplier has been retrieved or
* the input device set, or high-res scroll enabling may fail. In such
* cases we must return early (falling back to default behaviour) to
@@ -3153,6 +3171,41 @@ static const struct attribute_group ps_attribute_group = {
.attrs = sysfs_attrs
};
+static bool hidpp_validate_report(struct hid_device *hdev, int id, int size,
+ bool optional)
+{
+ struct hid_report_enum *re;
+ struct hid_report *report;
+
+ if (id >= HID_MAX_IDS || id < 0) {
+ hid_err(hdev, "invalid HID report id %u\n", id);
+ return false;
+ }
+
+ re = &(hdev->report_enum[HID_OUTPUT_REPORT]);
+ report = re->report_id_hash[id];
+
+ if (!report)
+ return optional;
+
+ if (report->field[0]->report_count < size) {
+ hid_warn(hdev, "not enough values in hidpp report %d\n", id);
+ return false;
+ }
+
+ return true;
+}
+
+static bool hidpp_validate_device(struct hid_device *hdev)
+{
+ return hidpp_validate_report(hdev, REPORT_ID_HIDPP_SHORT,
+ HIDPP_REPORT_SHORT_LENGTH - 1, false) &&
+ hidpp_validate_report(hdev, REPORT_ID_HIDPP_LONG,
+ HIDPP_REPORT_LONG_LENGTH - 1, true) &&
+ hidpp_validate_report(hdev, REPORT_ID_HIDPP_VERY_LONG,
+ HIDPP_REPORT_VERY_LONG_LENGTH - 1, true);
+}
+
static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
struct hidpp_device *hidpp;
@@ -3160,6 +3213,18 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
bool connected;
unsigned int connect_mask = HID_CONNECT_DEFAULT;
+ ret = hid_parse(hdev);
+ if (ret) {
+ hid_err(hdev, "%s:parse failed\n", __func__);
+ return ret;
+ }
+
+ /*
+ * Make sure the device is HID++ capable, otherwise treat as generic HID
+ */
+ if (!hidpp_validate_device(hdev))
+ return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+
hidpp = devm_kzalloc(&hdev->dev, sizeof(struct hidpp_device),
GFP_KERNEL);
if (!hidpp)
@@ -3203,12 +3268,6 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
hid_warn(hdev, "Cannot allocate sysfs group for %s\n",
hdev->name);
- ret = hid_parse(hdev);
- if (ret) {
- hid_err(hdev, "%s:parse failed\n", __func__);
- goto hid_parse_fail;
- }
-
if (hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT)
connect_mask &= ~HID_CONNECT_HIDINPUT;
@@ -3284,7 +3343,6 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
hid_hw_stop(hdev);
}
hid_hw_start_fail:
-hid_parse_fail:
sysfs_remove_group(&hdev->dev.kobj, &ps_attribute_group);
cancel_work_sync(&hidpp->work);
mutex_destroy(&hidpp->send_mutex);
@@ -3297,6 +3355,9 @@ static void hidpp_remove(struct hid_device *hdev)
{
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
+ if (!hidpp)
+ return hid_hw_stop(hdev);
+
sysfs_remove_group(&hdev->dev.kobj, &ps_attribute_group);
if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
--
2.14.3
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