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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2014-08-06 13:58:25 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-08-06 15:14:52 -0700 |
| commit | 849e2f06781a0c73573024bdaea0babc0c4e31af (patch) | |
| tree | 43711130ccd3588440bf8c03c9f6e3b0e3964d4b /drivers/hid | |
| parent | 81af7e61a774e687ed4a7f37992ef75da57c5ddf (diff) | |
| download | linux-849e2f06781a0c73573024bdaea0babc0c4e31af.tar.gz | |
Input: wacom - check for bluetooth protocol while setting OLEDs
Bluetooth Intuos 4 use 1-bit definition while the USB ones use a 4-bits definition. This changes the size of the raw image we receive, and thus the kernel will only accept 1-bit images for Bluetooth and 4-bits for USB. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Przemo Firszt <przemo@firszt.eu> Reviewed-by: Ping Cheng <pingc@wacom.com> Tested-by: Przemo Firszt <przemo@firszt.eu> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/wacom_sys.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c index f5c9c56c0975..a12cd9c3a6ee 100644 --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -20,6 +20,7 @@ #define WAC_CMD_LED_CONTROL 0x20 #define WAC_CMD_ICON_START 0x21 #define WAC_CMD_ICON_XFER 0x23 +#define WAC_CMD_ICON_BT_XFER 0x26 #define WAC_CMD_RETRIES 10 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 id, @@ -526,12 +527,14 @@ static int wacom_led_control(struct wacom *wacom) return retval; } -static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img) +static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id, + const unsigned len, const void *img) { unsigned char *buf; int i, retval; + const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */ - buf = kzalloc(259, GFP_KERNEL); + buf = kzalloc(chunk_len + 3 , GFP_KERNEL); if (!buf) return -ENOMEM; @@ -543,15 +546,15 @@ static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *im if (retval < 0) goto out; - buf[0] = WAC_CMD_ICON_XFER; + buf[0] = xfer_id; buf[1] = button_id & 0x07; for (i = 0; i < 4; i++) { buf[2] = i; - memcpy(buf + 3, img + i * 256, 256); + memcpy(buf + 3, img + i * chunk_len, chunk_len); retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, - WAC_CMD_ICON_XFER, - buf, 259, WAC_CMD_RETRIES); + xfer_id, buf, chunk_len + 3, + WAC_CMD_RETRIES); if (retval < 0) break; } @@ -652,13 +655,23 @@ static ssize_t wacom_button_image_store(struct device *dev, int button_id, struct hid_device *hdev = container_of(dev, struct hid_device, dev); struct wacom *wacom = hid_get_drvdata(hdev); int err; + unsigned len; + u8 xfer_id; - if (count != 1024) + if (hdev->bus == BUS_BLUETOOTH) { + len = 256; + xfer_id = WAC_CMD_ICON_BT_XFER; + } else { + len = 1024; + xfer_id = WAC_CMD_ICON_XFER; + } + + if (count != len) return -EINVAL; mutex_lock(&wacom->lock); - err = wacom_led_putimage(wacom, button_id, buf); + err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf); mutex_unlock(&wacom->lock); |