diff options
| -rw-r--r-- | drivers/hid/hid-uclogic-core.c | 54 | ||||
| -rw-r--r-- | drivers/hid/hid-uclogic-params.c | 2 | ||||
| -rw-r--r-- | drivers/hid/hid-uclogic-params.h | 2 |
3 files changed, 58 insertions, 0 deletions
diff --git a/drivers/hid/hid-uclogic-core.c b/drivers/hid/hid-uclogic-core.c index 8f8e445d77aa..206642802ca5 100644 --- a/drivers/hid/hid-uclogic-core.c +++ b/drivers/hid/hid-uclogic-core.c @@ -16,6 +16,7 @@ #include <linux/device.h> #include <linux/hid.h> #include <linux/module.h> +#include <linux/timer.h> #include "usbhid/usbhid.h" #include "hid-uclogic-params.h" @@ -32,8 +33,40 @@ struct uclogic_drvdata { * Only valid if desc_ptr is not NULL */ unsigned int desc_size; + /* Pen input device */ + struct input_dev *pen_input; + /* In-range timer */ + struct timer_list inrange_timer; }; +/** + * uclogic_inrange_timeout - handle pen in-range state timeout. + * Emulate input events normally generated when pen goes out of range for + * tablets which don't report that. + * + * @t: The timer the timeout handler is attached to, stored in a struct + * uclogic_drvdata. + */ +static void uclogic_inrange_timeout(struct timer_list *t) +{ + struct uclogic_drvdata *drvdata = from_timer(drvdata, t, + inrange_timer); + struct input_dev *input = drvdata->pen_input; + + if (input == NULL) + return; + input_report_abs(input, ABS_PRESSURE, 0); + /* If BTN_TOUCH state is changing */ + if (test_bit(BTN_TOUCH, input->key)) { + input_event(input, EV_MSC, MSC_SCAN, + /* Digitizer Tip Switch usage */ + 0xd0042); + input_report_key(input, BTN_TOUCH, 0); + } + input_report_key(input, BTN_TOOL_PEN, 0); + input_sync(input); +} + static __u8 *uclogic_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { @@ -67,6 +100,8 @@ static int uclogic_input_mapping(struct hid_device *hdev, static int uclogic_input_configured(struct hid_device *hdev, struct hid_input *hi) { + struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); + struct uclogic_params *params = &drvdata->params; char *name; const char *suffix = NULL; struct hid_field *field; @@ -76,6 +111,15 @@ static int uclogic_input_configured(struct hid_device *hdev, if (!hi->report) return 0; + /* + * If this is the input corresponding to the pen report + * in need of tweaking. + */ + if (hi->report->id == params->pen.id) { + /* Remember the input device so we can simulate events */ + drvdata->pen_input = hi->input; + } + field = hi->report->field[0]; switch (field->application) { @@ -130,6 +174,7 @@ static int uclogic_probe(struct hid_device *hdev, rc = -ENOMEM; goto failure; } + timer_setup(&drvdata->inrange_timer, uclogic_inrange_timeout, 0); hid_set_drvdata(hdev, drvdata); /* Initialize the device and retrieve interface parameters */ @@ -220,6 +265,14 @@ static int uclogic_raw_event(struct hid_device *hdev, /* Invert the in-range bit */ data[1] ^= 0x40; } + /* If we need to emulate in-range detection */ + if (params->pen.inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) { + /* Set in-range bit */ + data[1] |= 0x40; + /* (Re-)start in-range timeout */ + mod_timer(&drvdata->inrange_timer, + jiffies + msecs_to_jiffies(100)); + } } return 0; @@ -229,6 +282,7 @@ static void uclogic_remove(struct hid_device *hdev) { struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); + del_timer_sync(&drvdata->inrange_timer); hid_hw_stop(hdev); kfree(drvdata->desc_ptr); uclogic_params_cleanup(&drvdata->params); diff --git a/drivers/hid/hid-uclogic-params.c b/drivers/hid/hid-uclogic-params.c index f555db120baa..b5e4d99c6771 100644 --- a/drivers/hid/hid-uclogic-params.c +++ b/drivers/hid/hid-uclogic-params.c @@ -36,6 +36,8 @@ const char *uclogic_params_pen_inrange_to_str( return "normal"; case UCLOGIC_PARAMS_PEN_INRANGE_INVERTED: return "inverted"; + case UCLOGIC_PARAMS_PEN_INRANGE_NONE: + return "none"; default: return NULL; } diff --git a/drivers/hid/hid-uclogic-params.h b/drivers/hid/hid-uclogic-params.h index 4c78d9dd0576..665954d6ba57 100644 --- a/drivers/hid/hid-uclogic-params.h +++ b/drivers/hid/hid-uclogic-params.h @@ -25,6 +25,8 @@ enum uclogic_params_pen_inrange { UCLOGIC_PARAMS_PEN_INRANGE_NORMAL = 0, /* Inverted reports: zero - in proximity, one - out of proximity */ UCLOGIC_PARAMS_PEN_INRANGE_INVERTED, + /* No reports */ + UCLOGIC_PARAMS_PEN_INRANGE_NONE, }; /* Convert a pen in-range reporting type to a string */ |