diff options
| -rw-r--r-- | drivers/hid/hid-uclogic.c | 102 |
1 files changed, 97 insertions, 5 deletions
diff --git a/drivers/hid/hid-uclogic.c b/drivers/hid/hid-uclogic.c index 790528e47000..73c040d56954 100644 --- a/drivers/hid/hid-uclogic.c +++ b/drivers/hid/hid-uclogic.c @@ -586,6 +586,27 @@ static const __u8 uclogic_tablet_rdesc_template[] = { 0xC0 /* End Collection */ }; +/* Fixed virtual pad report descriptor */ +static const __u8 uclogic_buttonpad_rdesc[] = { + 0x05, 0x01, /* Usage Page (Desktop), */ + 0x09, 0x07, /* Usage (Keypad), */ + 0xA1, 0x01, /* Collection (Application), */ + 0x85, 0xF7, /* Report ID (247), */ + 0x05, 0x0D, /* Usage Page (Digitizers), */ + 0x09, 0x39, /* Usage (Tablet Function Keys), */ + 0xA0, /* Collection (Physical), */ + 0x05, 0x09, /* Usage Page (Button), */ + 0x75, 0x01, /* Report Size (1), */ + 0x95, 0x18, /* Report Count (24), */ + 0x81, 0x03, /* Input (Constant, Variable), */ + 0x19, 0x01, /* Usage Minimum (01h), */ + 0x29, 0x08, /* Usage Maximum (08h), */ + 0x95, 0x08, /* Report Count (8), */ + 0x81, 0x02, /* Input (Variable), */ + 0xC0, /* End Collection */ + 0xC0 /* End Collection */ +}; + /* Parameter indices */ enum uclogic_prm { UCLOGIC_PRM_X_LM = 1, @@ -601,6 +622,7 @@ struct uclogic_drvdata { unsigned int rsize; bool invert_pen_inrange; bool ignore_pen_usage; + bool has_virtual_pad_interface; }; static __u8 *uclogic_report_fixup(struct hid_device *hdev, __u8 *rdesc, @@ -847,6 +869,69 @@ cleanup: return rc; } +/** + * Enable actual button mode. + * + * @hdev: HID device + */ +static int uclogic_button_enable(struct hid_device *hdev) +{ + int rc; + struct usb_device *usb_dev = hid_to_usb_dev(hdev); + struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); + char *str_buf; + size_t str_len = 16; + unsigned char *rdesc; + size_t rdesc_len; + + str_buf = kzalloc(str_len, GFP_KERNEL); + if (str_buf == NULL) { + rc = -ENOMEM; + goto cleanup; + } + + /* Enable abstract keyboard mode */ + rc = usb_string(usb_dev, 0x7b, str_buf, str_len); + if (rc == -EPIPE) { + hid_info(hdev, "button mode setting not found\n"); + rc = 0; + goto cleanup; + } else if (rc < 0) { + hid_err(hdev, "failed to enable abstract keyboard\n"); + goto cleanup; + } else if (strncmp(str_buf, "HK On", rc)) { + hid_info(hdev, "invalid answer when requesting buttons: '%s'\n", + str_buf); + rc = -EINVAL; + goto cleanup; + } + + /* Re-allocate fixed report descriptor */ + rdesc_len = drvdata->rsize + sizeof(uclogic_buttonpad_rdesc); + rdesc = devm_kzalloc(&hdev->dev, rdesc_len, GFP_KERNEL); + if (!rdesc) { + rc = -ENOMEM; + goto cleanup; + } + + memcpy(rdesc, drvdata->rdesc, drvdata->rsize); + + /* Append the buttonpad descriptor */ + memcpy(rdesc + drvdata->rsize, uclogic_buttonpad_rdesc, + sizeof(uclogic_buttonpad_rdesc)); + + /* clean up old rdesc and use the new one */ + drvdata->rsize = rdesc_len; + devm_kfree(&hdev->dev, drvdata->rdesc); + drvdata->rdesc = rdesc; + + rc = 0; + +cleanup: + kfree(str_buf); + return rc; +} + static int uclogic_probe(struct hid_device *hdev, const struct hid_device_id *id) { @@ -878,6 +963,9 @@ static int uclogic_probe(struct hid_device *hdev, return rc; } drvdata->invert_pen_inrange = true; + + rc = uclogic_button_enable(hdev); + drvdata->has_virtual_pad_interface = !rc; } else { drvdata->ignore_pen_usage = true; } @@ -904,12 +992,16 @@ static int uclogic_raw_event(struct hid_device *hdev, struct hid_report *report, { struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev); - if ((drvdata->invert_pen_inrange) && - (report->type == HID_INPUT_REPORT) && + if ((report->type == HID_INPUT_REPORT) && (report->id == UCLOGIC_PEN_REPORT_ID) && - (size >= 2)) - /* Invert the in-range bit */ - data[1] ^= 0x40; + (size >= 2)) { + if (drvdata->has_virtual_pad_interface && (data[1] & 0x20)) + /* Change to virtual frame button report ID */ + data[0] = 0xf7; + else if (drvdata->invert_pen_inrange) + /* Invert the in-range bit */ + data[1] ^= 0x40; + } return 0; } |