HID: Add driver for Retrode2 joypad adapter
This driver does 2 things:
- Apply the MULTI_INPUT quirk to create separate joypad device nodes
for each one of the 4 connectors.
- Rename the input devices so that their names are different, and allow
users to recognise which device corresponds to which physical port,
including the SNES (Mario Paint) Mouse.
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-retrode.c b/drivers/hid/hid-retrode.c
new file mode 100644
index 0000000..30cc7eb
--- /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");