5 files changed, 115 insertions, 0 deletions

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 687705c50794..d409435fc0c2 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -741,6 +741,14 @@ config HID_PRIMAX
         Support for Primax devices that are not fully compliant with the
         HID standard.
 
+config HID_RETRODE
+        tristate "Retrode"
+        depends on USB_HID
+        ---help---
+        Support for
+
+          * Retrode 2 cartridge and controller adapter
+
 config HID_ROCCAT
         tristate "Roccat device support"
         depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index fef027bc7fa3..9ac08e7ed887 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -81,6 +81,7 @@ hid-picolcd-$(CONFIG_DEBUG_FS)		+= hid-picolcd_debugfs.o
 
 obj-$(CONFIG_HID_PLANTRONICS)   += hid-plantronics.o
 obj-$(CONFIG_HID_PRIMAX)        += hid-primax.o
+obj-$(CONFIG_HID_RETRODE)       += hid-retrode.o
 obj-$(CONFIG_HID_ROCCAT)        += hid-roccat.o hid-roccat-common.o \
         hid-roccat-arvo.o hid-roccat-isku.o hid-roccat-kone.o \
         hid-roccat-koneplus.o hid-roccat-konepure.o hid-roccat-kovaplus.o \
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 6e040692f1d8..49b9b4e8bfb4 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -2151,6 +2151,9 @@ static const struct hid_device_id hid_have_special_driver[] = {
 #if IS_ENABLED(CONFIG_HID_PRODIKEYS)
         { HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS, USB_DEVICE_ID_PRODIKEYS_PCMIDI) },
 #endif
+#if IS_ENABLED(CONFIG_HID_RETRODE)
+        { HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) },
+#endif
 #if IS_ENABLED(CONFIG_HID_RMI)
         { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_COVER) },
         { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14) },
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 4f9a3938189a..82c9f2c43570 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -386,6 +386,9 @@
 #define USB_VENDOR_ID_FUTABA            0x0547
 #define USB_DEVICE_ID_LED_DISPLAY       0x7000
 
+#define USB_VENDOR_ID_FUTURE_TECHNOLOGY 0x0403
+#define USB_DEVICE_ID_RETRODE2          0x97c1
+
 #define USB_VENDOR_ID_ESSENTIAL_REALITY 0x0d7f
 #define USB_DEVICE_ID_ESSENTIAL_REALITY_P5 0x0100
 
diff --git a/drivers/hid/hid-retrode.c b/drivers/hid/hid-retrode.c
new file mode 100644
index 000000000000..30cc7ebb4d75
--- /dev/null
+++ b/drivers/hid/hid-retrode.c
@@ -0,0 +1,100 @@
+/*
+ *  HID driver for Retrode 2 controller adapter and plug-in extensions
+ *
+ *  Copyright (c) 2017 Bastien Nocera <hadess@hadess.net>
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ */
+
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include "hid-ids.h"
+
+#define CONTROLLER_NAME_BASE "Retrode"
+
+static int retrode_input_configured(struct hid_device *hdev,
+                                        struct hid_input *hi)
+{
+        struct hid_field *field = hi->report->field[0];
+        const char *suffix;
+        int number = 0;
+        char *name;
+
+        switch (field->report->id) {
+        case 0:
+                suffix = "SNES Mouse";
+                break;
+        case 1:
+        case 2:
+                suffix = "SNES / N64";
+                number = field->report->id;
+                break;
+        case 3:
+        case 4:
+                suffix = "Mega Drive";
+                number = field->report->id - 2;
+                break;
+        default:
+                hid_err(hdev, "Got unhandled report id %d\n", field->report->id);
+                suffix = "Unknown";
+        }
+
+        if (number)
+                name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
+                                "%s %s #%d", CONTROLLER_NAME_BASE,
+                                suffix, number);
+        else
+                name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
+                                "%s %s", CONTROLLER_NAME_BASE, suffix);
+
+        if (!name)
+                return -ENOMEM;
+
+        hi->input->name = name;
+
+        return 0;
+}
+
+static int retrode_probe(struct hid_device *hdev,
+                        const struct hid_device_id *id)
+{
+
+        int ret;
+
+        /* Has no effect on the mouse device */
+        hdev->quirks |= HID_QUIRK_MULTI_INPUT;
+
+        ret = hid_parse(hdev);
+        if (ret)
+                return ret;
+
+        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+        if (ret)
+                return ret;
+
+        return 0;
+}
+
+static const struct hid_device_id retrode_devices[] = {
+        { HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) },
+        { }
+};
+MODULE_DEVICE_TABLE(hid, retrode_devices);
+
+static struct hid_driver retrode_driver = {
+        .name             = "hid-retrode",
+        .id_table         = retrode_devices,
+        .input_configured = retrode_input_configured,
+        .probe            = retrode_probe,
+};
+
+module_hid_driver(retrode_driver);
+
+MODULE_LICENSE("GPL");