Input: add support for the Maple mouse on the SEGA Dreamcast

Signed-off-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

3 files changed, 163 insertions, 4 deletions

diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig
index 093c8c1bca74..e3855a7b5dac 100644
--- a/drivers/input/mouse/Kconfig
+++ b/drivers/input/mouse/Kconfig
@@ -292,4 +292,15 @@ config MOUSE_PXA930_TRKBALL
         help
           Say Y here to support PXA930 Trackball mouse.
 
+config MOUSE_MAPLE
+        tristate "Maple mouse (for the Dreamcast)"
+        depends on MAPLE
+        help
+          This driver supports the Maple mouse on the SEGA Dreamcast.
+
+          Most Dreamcast users, who have a mouse, will say Y here.
+
+          To compile this driver as a module choose M here: the module will be
+          called maplemouse.
+
 endif
diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile
index 8c8a1f236e28..472189468d67 100644
--- a/drivers/input/mouse/Makefile
+++ b/drivers/input/mouse/Makefile
@@ -6,18 +6,19 @@
 
 obj-$(CONFIG_MOUSE_AMIGA)               += amimouse.o
 obj-$(CONFIG_MOUSE_APPLETOUCH)          += appletouch.o
-obj-$(CONFIG_MOUSE_BCM5974)             += bcm5974.o
 obj-$(CONFIG_MOUSE_ATARI)               += atarimouse.o
-obj-$(CONFIG_MOUSE_RISCPC)              += rpcmouse.o
+obj-$(CONFIG_MOUSE_BCM5974)             += bcm5974.o
+obj-$(CONFIG_MOUSE_GPIO)                += gpio_mouse.o
+obj-$(CONFIG_MOUSE_HIL)                 += hil_ptr.o
 obj-$(CONFIG_MOUSE_INPORT)              += inport.o
 obj-$(CONFIG_MOUSE_LOGIBM)              += logibm.o
+obj-$(CONFIG_MOUSE_MAPLE)               += maplemouse.o
 obj-$(CONFIG_MOUSE_PC110PAD)            += pc110pad.o
 obj-$(CONFIG_MOUSE_PS2)                 += psmouse.o
 obj-$(CONFIG_MOUSE_PXA930_TRKBALL)      += pxa930_trkball.o
+obj-$(CONFIG_MOUSE_RISCPC)              += rpcmouse.o
 obj-$(CONFIG_MOUSE_SERIAL)              += sermouse.o
-obj-$(CONFIG_MOUSE_HIL)                 += hil_ptr.o
 obj-$(CONFIG_MOUSE_VSXXXAA)             += vsxxxaa.o
-obj-$(CONFIG_MOUSE_GPIO)                += gpio_mouse.o
 
 psmouse-objs := psmouse-base.o synaptics.o
 
diff --git a/drivers/input/mouse/maplemouse.c b/drivers/input/mouse/maplemouse.c
new file mode 100644
index 000000000000..d196abfb68bc
--- /dev/null
+++ b/drivers/input/mouse/maplemouse.c
@@ -0,0 +1,147 @@
+/*
+ *      SEGA Dreamcast mouse driver
+ *      Based on drivers/usb/usbmouse.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 mouse driver");
+MODULE_LICENSE("GPL");
+
+struct dc_mouse {
+        struct input_dev *dev;
+        struct maple_device *mdev;
+};
+
+static void dc_mouse_callback(struct mapleq *mq)
+{
+        int buttons, relx, rely, relz;
+        struct maple_device *mapledev = mq->dev;
+        struct dc_mouse *mse = maple_get_drvdata(mapledev);
+        struct input_dev *dev = mse->dev;
+        unsigned char *res = mq->recvbuf;
+
+        buttons = ~res[8];
+        relx = *(unsigned short *)(res + 12) - 512;
+        rely = *(unsigned short *)(res + 14) - 512;
+        relz = *(unsigned short *)(res + 16) - 512;
+
+        input_report_key(dev, BTN_LEFT,   buttons & 4);
+        input_report_key(dev, BTN_MIDDLE, buttons & 9);
+        input_report_key(dev, BTN_RIGHT,  buttons & 2);
+        input_report_rel(dev, REL_X,      relx);
+        input_report_rel(dev, REL_Y,      rely);
+        input_report_rel(dev, REL_WHEEL,  relz);
+        input_sync(dev);
+}
+
+static int dc_mouse_open(struct input_dev *dev)
+{
+        struct dc_mouse *mse = dev->dev.platform_data;
+
+        maple_getcond_callback(mse->mdev, dc_mouse_callback, HZ/50,
+                MAPLE_FUNC_MOUSE);
+
+        return 0;
+}
+
+static void dc_mouse_close(struct input_dev *dev)
+{
+        struct dc_mouse *mse = dev->dev.platform_data;
+
+        maple_getcond_callback(mse->mdev, dc_mouse_callback, 0,
+                MAPLE_FUNC_MOUSE);
+}
+
+
+static int __devinit probe_maple_mouse(struct device *dev)
+{
+        struct maple_device *mdev = to_maple_dev(dev);
+        struct maple_driver *mdrv = to_maple_driver(dev->driver);
+        struct input_dev *input_dev;
+        struct dc_mouse *mse;
+        int error;
+
+        mse = kzalloc(sizeof(struct dc_mouse), GFP_KERNEL);
+        input_dev = input_allocate_device();
+
+        if (!mse || !input_dev) {
+                error = -ENOMEM;
+                goto fail;
+        }
+
+        mse->dev = input_dev;
+        mse->mdev = mdev;
+
+        input_set_drvdata(input_dev, mse);
+        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
+        input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
+                BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
+        input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
+                BIT_MASK(REL_WHEEL);
+        input_dev->name = mdev->product_name;
+        input_dev->id.bustype = BUS_HOST;
+        input_dev->open = dc_mouse_open;
+        input_dev->close = dc_mouse_close;
+
+        mdev->driver = mdrv;
+        maple_set_drvdata(mdev, mse);
+
+        error = input_register_device(input_dev);
+        if (error)
+                goto fail;
+
+        return 0;
+
+fail:
+        input_free_device(input_dev);
+        maple_set_drvdata(mdev, NULL);
+        kfree(mse);
+        mdev->driver = NULL;
+        return error;
+}
+
+static int __devexit remove_maple_mouse(struct device *dev)
+{
+        struct maple_device *mdev = to_maple_dev(dev);
+        struct dc_mouse *mse = maple_get_drvdata(mdev);
+
+        mdev->callback = NULL;
+        input_unregister_device(mse->dev);
+        maple_set_drvdata(mdev, NULL);
+        kfree(mse);
+
+        return 0;
+}
+
+static struct maple_driver dc_mouse_driver = {
+        .function =     MAPLE_FUNC_MOUSE,
+        .drv = {
+                .name = "Dreamcast_mouse",
+                .probe = probe_maple_mouse,
+                .remove = __devexit_p(remove_maple_mouse),
+        },
+};
+
+static int __init dc_mouse_init(void)
+{
+        return maple_driver_register(&dc_mouse_driver);
+}
+
+static void __exit dc_mouse_exit(void)
+{
+        maple_driver_unregister(&dc_mouse_driver);
+}
+
+module_init(dc_mouse_init);
+module_exit(dc_mouse_exit);