Input: add support for Maple controller as a joystick

Add support for the SEGA Dreamcast Maple controller as a joystick

Signed-off-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

3 files changed, 206 insertions, 0 deletions

diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
index 268dd3fef0ab..b11419590cfe 100644
--- a/drivers/input/joystick/Kconfig
+++ b/drivers/input/joystick/Kconfig
@@ -306,4 +306,16 @@ config JOYSTICK_WALKERA0701
           To compile this driver as a module, choose M here: the
           module will be called walkera0701.
 
+config JOYSTICK_MAPLE
+        tristate "Dreamcast control pad"
+        depends on MAPLE
+        help
+          Say Y here if you have a SEGA Dreamcast and want to use your
+          controller as a joystick.
+
+          Most Dreamcast users will say Y.
+
+          To compile this as a module choose M here: the module will be called
+          maplecontrol.
+
 endif
diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile
index 723036295685..f3a8cbe2abb6 100644
--- a/drivers/input/joystick/Makefile
+++ b/drivers/input/joystick/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_JOYSTICK_IFORCE)		+= iforce/
 obj-$(CONFIG_JOYSTICK_INTERACT)         += interact.o
 obj-$(CONFIG_JOYSTICK_JOYDUMP)          += joydump.o
 obj-$(CONFIG_JOYSTICK_MAGELLAN)         += magellan.o
+obj-$(CONFIG_JOYSTICK_MAPLE)            += maplecontrol.o
 obj-$(CONFIG_JOYSTICK_SIDEWINDER)       += sidewinder.o
 obj-$(CONFIG_JOYSTICK_SPACEBALL)        += spaceball.o
 obj-$(CONFIG_JOYSTICK_SPACEORB)         += spaceorb.o
diff --git a/drivers/input/joystick/maplecontrol.c b/drivers/input/joystick/maplecontrol.c
new file mode 100644
index 000000000000..e50047bfe938
--- /dev/null
+++ b/drivers/input/joystick/maplecontrol.c
@@ -0,0 +1,193 @@
+/*
+ *      SEGA Dreamcast controller driver
+ *      Based on drivers/usb/iforce.c
+ *
+ *      Copyright Yaegashi Takeshi, 2001
+ *      Adrian McMenamin, 2008
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/maple.h>
+
+MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
+MODULE_DESCRIPTION("SEGA Dreamcast controller driver");
+MODULE_LICENSE("GPL");
+
+struct dc_pad {
+        struct input_dev *dev;
+        struct maple_device *mdev;
+};
+
+static void dc_pad_callback(struct mapleq *mq)
+{
+        unsigned short buttons;
+        struct maple_device *mapledev = mq->dev;
+        struct dc_pad *pad = maple_get_drvdata(mapledev);
+        struct input_dev *dev = pad->dev;
+        unsigned char *res = mq->recvbuf;
+
+        buttons = ~le16_to_cpup((__le16 *)(res + 8));
+
+        input_report_abs(dev, ABS_HAT0Y,
+                (buttons & 0x0010 ? -1 : 0) + (buttons & 0x0020 ? 1 : 0));
+        input_report_abs(dev, ABS_HAT0X,
+                (buttons & 0x0040 ? -1 : 0) + (buttons & 0x0080 ? 1 : 0));
+        input_report_abs(dev, ABS_HAT1Y,
+                (buttons & 0x1000 ? -1 : 0) + (buttons & 0x2000 ? 1 : 0));
+        input_report_abs(dev, ABS_HAT1X,
+                (buttons & 0x4000 ? -1 : 0) + (buttons & 0x8000 ? 1 : 0));
+
+        input_report_key(dev, BTN_C,      buttons & 0x0001);
+        input_report_key(dev, BTN_B,      buttons & 0x0002);
+        input_report_key(dev, BTN_A,      buttons & 0x0004);
+        input_report_key(dev, BTN_START,  buttons & 0x0008);
+        input_report_key(dev, BTN_Z,      buttons & 0x0100);
+        input_report_key(dev, BTN_Y,      buttons & 0x0200);
+        input_report_key(dev, BTN_X,      buttons & 0x0400);
+        input_report_key(dev, BTN_SELECT, buttons & 0x0800);
+
+        input_report_abs(dev, ABS_GAS,    res[10]);
+        input_report_abs(dev, ABS_BRAKE,  res[11]);
+        input_report_abs(dev, ABS_X,      res[12]);
+        input_report_abs(dev, ABS_Y,      res[13]);
+        input_report_abs(dev, ABS_RX,     res[14]);
+        input_report_abs(dev, ABS_RY,     res[15]);
+}
+
+static int dc_pad_open(struct input_dev *dev)
+{
+        struct dc_pad *pad = dev->dev.platform_data;
+
+        maple_getcond_callback(pad->mdev, dc_pad_callback, HZ/20,
+                MAPLE_FUNC_CONTROLLER);
+
+        return 0;
+}
+
+static void dc_pad_close(struct input_dev *dev)
+{
+        struct dc_pad *pad = dev->dev.platform_data;
+
+        maple_getcond_callback(pad->mdev, dc_pad_callback, 0,
+                MAPLE_FUNC_CONTROLLER);
+}
+
+/* allow the controller to be used */
+static int __devinit probe_maple_controller(struct device *dev)
+{
+        static const short btn_bit[32] = {
+                BTN_C, BTN_B, BTN_A, BTN_START, -1, -1, -1, -1,
+                BTN_Z, BTN_Y, BTN_X, BTN_SELECT, -1, -1, -1, -1,
+                -1, -1, -1, -1, -1, -1, -1, -1,
+                -1, -1, -1, -1, -1, -1, -1, -1,
+        };
+
+        static const short abs_bit[32] = {
+                -1, -1, -1, -1, ABS_HAT0Y, ABS_HAT0Y, ABS_HAT0X, ABS_HAT0X,
+                -1, -1, -1, -1, ABS_HAT1Y, ABS_HAT1Y, ABS_HAT1X, ABS_HAT1X,
+                ABS_GAS, ABS_BRAKE, ABS_X, ABS_Y, ABS_RX, ABS_RY, -1, -1,
+                -1, -1, -1, -1, -1, -1, -1, -1,
+        };
+
+        struct maple_device *mdev = to_maple_dev(dev);
+        struct maple_driver *mdrv = to_maple_driver(dev->driver);
+        int i, error;
+        struct dc_pad *pad;
+        struct input_dev *idev;
+        unsigned long data = be32_to_cpu(mdev->devinfo.function_data[0]);
+
+        pad = kzalloc(sizeof(struct dc_pad), GFP_KERNEL);
+        idev = input_allocate_device();
+        if (!pad || !idev) {
+                error = -ENOMEM;
+                goto fail;
+        }
+
+        pad->dev = idev;
+        pad->mdev = mdev;
+
+        idev->open = dc_pad_open;
+        idev->close = dc_pad_close;
+
+        for (i = 0; i < 32; i++) {
+                if (data & (1 << i)) {
+                        if (btn_bit[i] >= 0)
+                                __set_bit(btn_bit[i], idev->keybit);
+                        else if (abs_bit[i] >= 0)
+                                __set_bit(abs_bit[i], idev->absbit);
+                }
+        }
+
+        if (idev->keybit[BIT_WORD(BTN_JOYSTICK)])
+                idev->evbit[0] |= BIT_MASK(EV_KEY);
+
+        if (idev->absbit[0])
+                idev->evbit[0] |= BIT_MASK(EV_ABS);
+
+        for (i = ABS_X; i <= ABS_BRAKE; i++)
+                input_set_abs_params(idev, i, 0, 255, 0, 0);
+
+        for (i = ABS_HAT0X; i <= ABS_HAT3Y; i++)
+                input_set_abs_params(idev, i, 1, -1, 0, 0);
+
+        idev->dev.platform_data = pad;
+        idev->dev.parent = &mdev->dev;
+        idev->name = mdev->product_name;
+        idev->id.bustype = BUS_HOST;
+        input_set_drvdata(idev, pad);
+
+        error = input_register_device(idev);
+        if (error)
+                goto fail;
+
+        mdev->driver = mdrv;
+        maple_set_drvdata(mdev, pad);
+
+        return 0;
+
+fail:
+        input_free_device(idev);
+        kfree(pad);
+        maple_set_drvdata(mdev, NULL);
+        return error;
+}
+
+static int __devexit remove_maple_controller(struct device *dev)
+{
+        struct maple_device *mdev = to_maple_dev(dev);
+        struct dc_pad *pad = maple_get_drvdata(mdev);
+
+        mdev->callback = NULL;
+        input_unregister_device(pad->dev);
+        maple_set_drvdata(mdev, NULL);
+        kfree(pad);
+
+        return 0;
+}
+
+static struct maple_driver dc_pad_driver = {
+        .function =     MAPLE_FUNC_CONTROLLER,
+        .drv = {
+                .name   = "Dreamcast_controller",
+                .probe  = probe_maple_controller,
+                .remove = __devexit_p(remove_maple_controller),
+        },
+};
+
+static int __init dc_pad_init(void)
+{
+        return maple_driver_register(&dc_pad_driver);
+}
+
+static void __exit dc_pad_exit(void)
+{
+        maple_driver_unregister(&dc_pad_driver);
+}
+
+module_init(dc_pad_init);
+module_exit(dc_pad_exit);