diff options
Diffstat (limited to 'drivers/hid/hid-waltop.c')
| -rw-r--r-- | drivers/hid/hid-waltop.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/drivers/hid/hid-waltop.c b/drivers/hid/hid-waltop.c index c1dce51b1c1..2cfd95c4467 100644 --- a/drivers/hid/hid-waltop.c +++ b/drivers/hid/hid-waltop.c @@ -211,6 +211,64 @@ static __u8 q_pad_rdesc_fixed[] = { }; /* + * See description, device and HID report descriptors of tablet with PID 0038 at + * http://sf.net/apps/mediawiki/digimend/?title=Waltop_PID_0038 + */ + +/* Size of the original report descriptor of tablet with PID 0038 */ +#define PID_0038_RDESC_ORIG_SIZE 241 + +/* + * Fixed report descriptor for tablet with PID 0038. + */ +static __u8 pid_0038_rdesc_fixed[] = { + 0x05, 0x0D, /* Usage Page (Digitizer), */ + 0x09, 0x02, /* Usage (Pen), */ + 0xA1, 0x01, /* Collection (Application), */ + 0x85, 0x10, /* Report ID (16), */ + 0x09, 0x20, /* Usage (Stylus), */ + 0xA0, /* Collection (Physical), */ + 0x09, 0x42, /* Usage (Tip Switch), */ + 0x09, 0x44, /* Usage (Barrel Switch), */ + 0x09, 0x46, /* Usage (Tablet Pick), */ + 0x15, 0x01, /* Logical Minimum (1), */ + 0x25, 0x03, /* Logical Maximum (3), */ + 0x75, 0x04, /* Report Size (4), */ + 0x95, 0x01, /* Report Count (1), */ + 0x80, /* Input, */ + 0x09, 0x32, /* Usage (In Range), */ + 0x14, /* Logical Minimum (0), */ + 0x25, 0x01, /* Logical Maximum (1), */ + 0x75, 0x01, /* Report Size (1), */ + 0x95, 0x01, /* Report Count (1), */ + 0x81, 0x02, /* Input (Variable), */ + 0x95, 0x03, /* Report Count (3), */ + 0x81, 0x03, /* Input (Constant, Variable), */ + 0x75, 0x10, /* Report Size (16), */ + 0x95, 0x01, /* Report Count (1), */ + 0x14, /* Logical Minimum (0), */ + 0xA4, /* Push, */ + 0x05, 0x01, /* Usage Page (Desktop), */ + 0x65, 0x13, /* Unit (Inch), */ + 0x55, 0xFD, /* Unit Exponent (-3), */ + 0x34, /* Physical Minimum (0), */ + 0x09, 0x30, /* Usage (X), */ + 0x46, 0x2E, 0x22, /* Physical Maximum (8750), */ + 0x26, 0x00, 0x46, /* Logical Maximum (17920), */ + 0x81, 0x02, /* Input (Variable), */ + 0x09, 0x31, /* Usage (Y), */ + 0x46, 0x82, 0x14, /* Physical Maximum (5250), */ + 0x26, 0x00, 0x2A, /* Logical Maximum (10752), */ + 0x81, 0x02, /* Input (Variable), */ + 0xB4, /* Pop, */ + 0x09, 0x30, /* Usage (Tip Pressure), */ + 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */ + 0x81, 0x02, /* Input (Variable), */ + 0xC0, /* End Collection, */ + 0xC0 /* End Collection */ +}; + +/* * See Media Tablet 10.6 inch description, device and HID report descriptors at * http://sf.net/apps/mediawiki/digimend/?title=Waltop_Media_Tablet_10.6%22 */ @@ -444,6 +502,47 @@ static __u8 media_tablet_14_1_inch_rdesc_fixed[] = { 0xC0 /* End Collection */ }; +struct waltop_state { + u8 pressure0; + u8 pressure1; +}; + +static int waltop_probe(struct hid_device *hdev, + const struct hid_device_id *id) +{ + int ret; + struct waltop_state *s; + + s = kzalloc(sizeof(*s), GFP_KERNEL); + if (s == NULL) { + hid_err(hdev, "can't allocate device state\n"); + ret = -ENOMEM; + goto err; + } + + s->pressure0 = 0; + s->pressure1 = 0; + + hid_set_drvdata(hdev, s); + + ret = hid_parse(hdev); + if (ret) { + hid_err(hdev, "parse failed\n"); + goto err; + } + + ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); + if (ret) { + hid_err(hdev, "hw start failed\n"); + goto err; + } + + return 0; +err: + kfree(s); + return ret; +} + static __u8 *waltop_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { @@ -466,6 +565,12 @@ static __u8 *waltop_report_fixup(struct hid_device *hdev, __u8 *rdesc, *rsize = sizeof(q_pad_rdesc_fixed); } break; + case USB_DEVICE_ID_WALTOP_PID_0038: + if (*rsize == PID_0038_RDESC_ORIG_SIZE) { + rdesc = pid_0038_rdesc_fixed; + *rsize = sizeof(pid_0038_rdesc_fixed); + } + break; case USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH: if (*rsize == MEDIA_TABLET_10_6_INCH_RDESC_ORIG_SIZE) { rdesc = media_tablet_10_6_inch_rdesc_fixed; @@ -482,6 +587,44 @@ static __u8 *waltop_report_fixup(struct hid_device *hdev, __u8 *rdesc, return rdesc; } +static int waltop_raw_event(struct hid_device *hdev, struct hid_report *report, + u8 *data, int size) +{ + /* If this is a pen input report of a tablet with PID 0038 */ + if (hdev->product == USB_DEVICE_ID_WALTOP_PID_0038 && + report->type == HID_INPUT_REPORT && + report->id == 16 && + size == 8) { + struct waltop_state *s = hid_get_drvdata(hdev); + + /* + * Ignore maximum pressure reported when a barrel button is + * pressed. + */ + + /* If a barrel button is pressed */ + if ((data[1] & 0xF) > 1) { + /* Use the last known pressure */ + data[6] = s->pressure0; + data[7] = s->pressure1; + } else { + /* Remember reported pressure */ + s->pressure0 = data[6]; + s->pressure1 = data[7]; + } + } + + return 0; +} + +static void waltop_remove(struct hid_device *hdev) +{ + struct waltop_state *s = hid_get_drvdata(hdev); + + hid_hw_stop(hdev); + kfree(s); +} + static const struct hid_device_id waltop_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) }, @@ -490,6 +633,8 @@ static const struct hid_device_id waltop_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_Q_PAD) }, { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, + USB_DEVICE_ID_WALTOP_PID_0038) }, + { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_10_6_INCH) }, { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_MEDIA_TABLET_14_1_INCH) }, @@ -500,7 +645,10 @@ MODULE_DEVICE_TABLE(hid, waltop_devices); static struct hid_driver waltop_driver = { .name = "waltop", .id_table = waltop_devices, + .probe = waltop_probe, .report_fixup = waltop_report_fixup, + .raw_event = waltop_raw_event, + .remove = waltop_remove, }; static int __init waltop_init(void) |