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HID: Implement Wacom quirk in the kernel 

The hid-wacom driver required user-space to poke at the tablet
to make it send data about the cursor location.

This patch makes it do the same thing but in the kernel.

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Bastien Nocera 2010-01-20 12:00:53 +00:00 committed by Jiri Kosina
parent d4bfa033ed
commit 46a709b900
1 changed files with 27 additions and 0 deletions
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27
drivers/hid/hid-wacom.c
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@ -156,7 +156,9 @@ static int wacom_probe(struct hid_device *hdev,
struct hid_input *hidinput;
struct input_dev *input;
struct wacom_data *wdata;
char rep_data[2];
int ret;
int limit;
wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
if (wdata == NULL) {
@ -166,6 +168,7 @@ static int wacom_probe(struct hid_device *hdev,
hid_set_drvdata(hdev, wdata);
/* Parse the HID report now */
ret = hid_parse(hdev);
if (ret) {
dev_err(&hdev->dev, "parse failed\n");
@ -178,6 +181,30 @@ static int wacom_probe(struct hid_device *hdev,
goto err_free;
}
/* Set Wacom mode2 */
rep_data[0] = 0x03; rep_data[1] = 0x00;
limit = 3;
do {
ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
HID_FEATURE_REPORT);
} while (ret < 0 && limit-- > 0);
if (ret < 0) {
dev_err(&hdev->dev, "failed to poke device #1, %d\n", ret);
goto err_free;
}
/* 0x06 - high reporting speed, 0x05 - low speed */
rep_data[0] = 0x06; rep_data[1] = 0x00;
limit = 3;
do {
ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
HID_FEATURE_REPORT);
} while (ret < 0 && limit-- > 0);
if (ret < 0) {
dev_err(&hdev->dev, "failed to poke device #2, %d\n", ret);
goto err_free;
}
hidinput = list_entry(hdev->inputs.next, struct hid_input, list);
input = hidinput->input;