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HID: wacom: break out parsing of device and registering of input

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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@redhat.com>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2016-02-12 17:27:41 +01:00 committed by Jiri Kosina
parent 7e129783b0
commit c58ac3a88d
1 changed files with 75 additions and 61 deletions
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136
drivers/hid/wacom_sys.c
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@ -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);