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Date: Fri, 12 Feb 2016 17:27:41 +0100
From: Benjamin Tissoires <benjamin.tissoires@...hat.com>
To: Jiri Kosina <jikos@...nel.org>, linux-input@...r.kernel.org
Cc: Ping Cheng <pinglinux@...il.com>,
Jason Gerecke <killertofu@...il.com>,
Aaron Skomra <skomra@...il.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] HID: wacom: break out parsing of device and registering of input
Simplifies the .probe() and will allow to reuse this path in the future.
Few things are reshuffled in .probe():
- init wacom struct earlier
- then retrieve the report descriptor
- then parse it and allocate/register inputs.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
---
drivers/hid/wacom_sys.c | 136 ++++++++++++++++++++++++++----------------------
1 file changed, 75 insertions(+), 61 deletions(-)
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index 5cb21dd..92a2c81 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -1685,61 +1685,21 @@ static void wacom_update_name(struct wacom *wacom)
"%s Pad", name);
}
-static int wacom_probe(struct hid_device *hdev,
- const struct hid_device_id *id)
+static int wacom_parse_and_register(struct wacom *wacom)
{
- struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
- struct usb_device *dev = interface_to_usbdev(intf);
- struct wacom *wacom;
- struct wacom_wac *wacom_wac;
- struct wacom_features *features;
+ struct wacom_wac *wacom_wac = &wacom->wacom_wac;
+ struct wacom_features *features = &wacom_wac->features;
+ struct hid_device *hdev = wacom->hdev;
int error;
unsigned int connect_mask = HID_CONNECT_HIDRAW;
- if (!id->driver_data)
- return -EINVAL;
-
- hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
-
- /* hid-core sets this quirk for the boot interface */
- hdev->quirks &= ~HID_QUIRK_NOGET;
-
- wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
- if (!wacom)
- return -ENOMEM;
-
- hid_set_drvdata(hdev, wacom);
- wacom->hdev = hdev;
-
- /* ask for the report descriptor to be loaded by HID */
- error = hid_parse(hdev);
- if (error) {
- hid_err(hdev, "parse failed\n");
- goto fail_parse;
- }
-
- wacom_wac = &wacom->wacom_wac;
- wacom_wac->features = *((struct wacom_features *)id->driver_data);
- features = &wacom_wac->features;
features->pktlen = wacom_compute_pktlen(hdev);
- if (features->pktlen > WACOM_PKGLEN_MAX) {
- error = -EINVAL;
- goto fail_pktlen;
- }
-
- if (features->check_for_hid_type && features->hid_type != hdev->type) {
- error = -ENODEV;
- goto fail_type;
- }
-
- wacom->usbdev = dev;
- wacom->intf = intf;
- mutex_init(&wacom->lock);
- INIT_WORK(&wacom->work, wacom_wireless_work);
+ if (features->pktlen > WACOM_PKGLEN_MAX)
+ return -EINVAL;
error = wacom_allocate_inputs(wacom);
if (error)
- goto fail_allocate_inputs;
+ return error;
/*
* Bamboo Pad has a generic hid handling for the Pen, and we switch it
@@ -1752,7 +1712,7 @@ static int wacom_probe(struct hid_device *hdev,
} else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
(features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
error = -ENODEV;
- goto fail_shared_data;
+ goto fail_allocate_inputs;
}
}
@@ -1772,7 +1732,7 @@ static int wacom_probe(struct hid_device *hdev,
error ? "Ignoring" : "Assuming pen");
if (error)
- goto fail_shared_data;
+ goto fail_parsed;
features->device_type |= WACOM_DEVICETYPE_PEN;
}
@@ -1796,14 +1756,6 @@ static int wacom_probe(struct hid_device *hdev,
if (error)
goto fail_register_inputs;
- if (hdev->bus == BUS_BLUETOOTH) {
- error = device_create_file(&hdev->dev, &dev_attr_speed);
- if (error)
- hid_warn(hdev,
- "can't create sysfs speed attribute err: %d\n",
- error);
- }
-
if (features->type == HID_GENERIC)
connect_mask |= HID_CONNECT_DRIVER;
@@ -1844,18 +1796,80 @@ static int wacom_probe(struct hid_device *hdev,
return 0;
fail_hw_start:
- if (hdev->bus == BUS_BLUETOOTH)
- device_remove_file(&hdev->dev, &dev_attr_speed);
+ hid_hw_stop(hdev);
fail_register_inputs:
wacom_clean_inputs(wacom);
wacom_destroy_battery(wacom);
fail_battery:
wacom_remove_shared_data(wacom);
fail_shared_data:
- wacom_clean_inputs(wacom);
+fail_parsed:
fail_allocate_inputs:
+ wacom_clean_inputs(wacom);
+ return error;
+}
+
+static int wacom_probe(struct hid_device *hdev,
+ const struct hid_device_id *id)
+{
+ struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+ struct usb_device *dev = interface_to_usbdev(intf);
+ struct wacom *wacom;
+ struct wacom_wac *wacom_wac;
+ struct wacom_features *features;
+ int error;
+
+ if (!id->driver_data)
+ return -EINVAL;
+
+ hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
+
+ /* hid-core sets this quirk for the boot interface */
+ hdev->quirks &= ~HID_QUIRK_NOGET;
+
+ wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
+ if (!wacom)
+ return -ENOMEM;
+
+ hid_set_drvdata(hdev, wacom);
+ wacom->hdev = hdev;
+
+ wacom_wac = &wacom->wacom_wac;
+ wacom_wac->features = *((struct wacom_features *)id->driver_data);
+ features = &wacom_wac->features;
+
+ if (features->check_for_hid_type && features->hid_type != hdev->type) {
+ error = -ENODEV;
+ goto fail_type;
+ }
+
+ wacom->usbdev = dev;
+ wacom->intf = intf;
+ mutex_init(&wacom->lock);
+ INIT_WORK(&wacom->work, wacom_wireless_work);
+
+ /* ask for the report descriptor to be loaded by HID */
+ error = hid_parse(hdev);
+ if (error) {
+ hid_err(hdev, "parse failed\n");
+ goto fail_parse;
+ }
+
+ error = wacom_parse_and_register(wacom);
+ if (error)
+ goto fail_parse;
+
+ if (hdev->bus == BUS_BLUETOOTH) {
+ error = device_create_file(&hdev->dev, &dev_attr_speed);
+ if (error)
+ hid_warn(hdev,
+ "can't create sysfs speed attribute err: %d\n",
+ error);
+ }
+
+ return 0;
+
fail_type:
-fail_pktlen:
fail_parse:
kfree(wacom);
hid_set_drvdata(hdev, NULL);
--
2.5.0
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