Input: wacom - handle Intuos 4 BT in wacom.ko

A good point of this change is that now, the Intuos4 bluetooth can handle
the different tools (artpen, airbrush, mice), and we get a common interface
between USB and BT for accessing the LEDs/OLEDs.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Ping Cheng <pingc@wacom.com>
Tested-by: Przemo Firszt <przemo@firszt.eu>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

5 files changed, 92 insertions, 2 deletions

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index cbabd8786e71..b3181ea8f860 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1942,7 +1942,6 @@ static const struct hid_device_id hid_have_special_driver[] = {
         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_3_PRO) },
         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_DUAL_BOX_PRO) },
         { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SUPER_JOY_BOX_5_PRO) },
-        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH) },
         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_5_8_INCH) },
         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_SLIM_TABLET_12_1_INCH) },
         { HID_USB_DEVICE(USB_VENDOR_ID_WALTOP, USB_DEVICE_ID_WALTOP_Q_PAD) },
diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 967c457a2785..db2d07da4b4e 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -952,7 +952,6 @@ static void wacom_remove(struct hid_device *hdev)
 }
 
 static const struct hid_device_id wacom_devices[] = {
-        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_WACOM, USB_DEVICE_ID_WACOM_INTUOS4_BLUETOOTH) },
 
         { }
 };
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index c21e58ba0693..f5c9c56c0975 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -296,6 +296,20 @@ static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
                          rep_data[0], ret);
                 break;
+        case INTUOS4WL:
+                if (speed == 1)
+                        wacom->wacom_wac.bt_features &= ~0x20;
+                else
+                        wacom->wacom_wac.bt_features |= 0x20;
+
+                rep_data[0] = 0x03;
+                rep_data[1] = wacom->wacom_wac.bt_features;
+
+                ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
+                                        rep_data[0], rep_data, 2, 1);
+                if (ret >= 0)
+                        wacom->wacom_wac.bt_high_speed = speed;
+                break;
         }
 
         return 0;
@@ -720,6 +734,7 @@ static int wacom_initialize_leds(struct wacom *wacom)
         switch (wacom->wacom_wac.features.type) {
         case INTUOS4S:
         case INTUOS4:
+        case INTUOS4WL:
         case INTUOS4L:
                 wacom->led.select[0] = 0;
                 wacom->led.select[1] = 0;
@@ -786,6 +801,7 @@ static void wacom_destroy_leds(struct wacom *wacom)
         switch (wacom->wacom_wac.features.type) {
         case INTUOS4S:
         case INTUOS4:
+        case INTUOS4WL:
         case INTUOS4L:
                 sysfs_remove_group(&wacom->hdev->dev.kobj,
                                    &intuos4_led_attr_group);
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index fa16a5bf3df3..d4a2d533a444 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -37,6 +37,11 @@
  */
 static unsigned short batcap_gr[8] = { 1, 15, 25, 35, 50, 70, 100, 100 };
 
+/*
+ * Percent of battery capacity for Intuos4 WL, AC has a separate bit.
+ */
+static unsigned short batcap_i4[8] = { 1, 15, 30, 45, 60, 70, 85, 100 };
+
 static int wacom_penpartner_irq(struct wacom_wac *wacom)
 {
         unsigned char *data = wacom->data;
@@ -953,6 +958,58 @@ static int int_dist(int x1, int y1, int x2, int y2)
         return int_sqrt(x*x + y*y);
 }
 
+static void wacom_intuos_bt_process_data(struct wacom_wac *wacom,
+                unsigned char *data)
+{
+        memcpy(wacom->data, data, 10);
+        wacom_intuos_irq(wacom);
+
+        input_sync(wacom->input);
+        if (wacom->pad_input)
+                input_sync(wacom->pad_input);
+}
+
+static int wacom_intuos_bt_irq(struct wacom_wac *wacom, size_t len)
+{
+        unsigned char data[WACOM_PKGLEN_MAX];
+        int i = 1;
+        unsigned power_raw, battery_capacity, bat_charging, ps_connected;
+
+        memcpy(data, wacom->data, len);
+
+        switch (data[0]) {
+        case 0x04:
+                wacom_intuos_bt_process_data(wacom, data + i);
+                i += 10;
+                /* fall through */
+        case 0x03:
+                wacom_intuos_bt_process_data(wacom, data + i);
+                i += 10;
+                wacom_intuos_bt_process_data(wacom, data + i);
+                i += 10;
+                power_raw = data[i];
+                bat_charging = (power_raw & 0x08) ? 1 : 0;
+                ps_connected = (power_raw & 0x10) ? 1 : 0;
+                battery_capacity = batcap_i4[power_raw & 0x07];
+                if ((wacom->battery_capacity != battery_capacity) ||
+                    (wacom->bat_charging != bat_charging) ||
+                    (wacom->ps_connected != ps_connected)) {
+                        wacom->battery_capacity = battery_capacity;
+                        wacom->bat_charging = bat_charging;
+                        wacom->ps_connected = ps_connected;
+                        wacom_notify_battery(wacom);
+                }
+
+                break;
+        default:
+                dev_dbg(wacom->input->dev.parent,
+                                "Unknown report: %d,%d size:%zu\n",
+                                data[0], data[1], len);
+                return 0;
+        }
+        return 0;
+}
+
 static int wacom_24hdt_irq(struct wacom_wac *wacom)
 {
         struct input_dev *input = wacom->input;
@@ -1512,6 +1569,10 @@ void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len)
                 sync = wacom_intuos_irq(wacom_wac);
                 break;
 
+        case INTUOS4WL:
+                sync = wacom_intuos_bt_irq(wacom_wac, len);
+                break;
+
         case WACOM_24HDT:
                 sync = wacom_24hdt_irq(wacom_wac);
                 break;
@@ -1803,6 +1864,7 @@ int wacom_setup_input_capabilities(struct input_dev *input_dev,
                 break;
 
         case INTUOS4:
+        case INTUOS4WL:
         case INTUOS4L:
         case INTUOS4S:
                 input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
@@ -2065,6 +2127,15 @@ int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
                 input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
                 break;
 
+        case INTUOS4WL:
+                /*
+                 * For Bluetooth devices, the udev rule does not work correctly
+                 * for pads unless we add a stylus capability, which forces
+                 * ID_INPUT_TABLET to be set.
+                 */
+                __set_bit(BTN_STYLUS, input_dev->keybit);
+                /* fall through */
+
         case INTUOS4:
         case INTUOS4L:
                 __set_bit(BTN_7, input_dev->keybit);
@@ -2279,6 +2350,9 @@ static const struct wacom_features wacom_features_0xBB =
 static const struct wacom_features wacom_features_0xBC =
         { "Wacom Intuos4 WL", 40640, 25400, 2047, 63,
           INTUOS4, WACOM_INTUOS3_RES, WACOM_INTUOS3_RES };
+static const struct wacom_features wacom_features_0xBD =
+        { "Wacom Intuos4 WL", 40640, 25400, 2047, 63,
+          INTUOS4WL, WACOM_INTUOS3_RES, WACOM_INTUOS3_RES };
 static const struct wacom_features wacom_features_0x26 =
         { "Wacom Intuos5 touch S", 31496, 19685, 2047, 63,
           INTUOS5S, WACOM_INTUOS3_RES, WACOM_INTUOS3_RES, .touch_max = 16 };
@@ -2598,6 +2672,7 @@ const struct hid_device_id wacom_ids[] = {
         { USB_DEVICE_WACOM(0xBA) },
         { USB_DEVICE_WACOM(0xBB) },
         { USB_DEVICE_WACOM(0xBC) },
+        { BT_DEVICE_WACOM(0xBD) },
         { USB_DEVICE_WACOM(0xC0) },
         { USB_DEVICE_WACOM(0xC2) },
         { USB_DEVICE_WACOM(0xC4) },
diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h
index 4f0178b9a789..339ab5d81a2d 100644
--- a/drivers/hid/wacom_wac.h
+++ b/drivers/hid/wacom_wac.h
@@ -86,6 +86,7 @@ enum {
         INTUOS3L,
         INTUOS4S,
         INTUOS4,
+        INTUOS4WL,
         INTUOS4L,
         INTUOS5S,
         INTUOS5,