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SubjectRe: [PATCH] sh: maple: add support for the Maple mouse on the SEGA Dreamcast
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Adding support for Maple mouse

Signed-off-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
---
diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig
index 4e99342..71cc98a 100644
--- a/drivers/input/mouse/Kconfig
+++ b/drivers/input/mouse/Kconfig
@@ -286,4 +286,15 @@ config MOUSE_GPIO
To compile this driver as a module, choose M here: the
module will be called gpio_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 96f1dd8..0272f5d 100644
--- a/drivers/input/mouse/Makefile
+++ b/drivers/input/mouse/Makefile
@@ -17,6 +17,7 @@ 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
+obj-$(CONFIG_MOUSE_MAPLE) += maplemouse.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 0000000..1c0830b
--- /dev/null
+++ b/drivers/input/mouse/maplemouse.c
@@ -0,0 +1,135 @@
+/*
+ * 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);
+}
+
+/* allow the mouse to be used */
+static int __devinit probe_maple_mouse(struct device *dev)
+{
+ struct maple_device *mdev;
+ struct maple_driver *mdrv;
+ int error;
+ struct input_dev *input_dev;
+ struct dc_mouse *mse;
+
+ mdev = to_maple_dev(dev);
+ mdrv = to_maple_driver(dev->driver);
+
+ mse = kzalloc(sizeof(struct dc_mouse), GFP_KERNEL);
+ if (!mse) {
+ error = -ENOMEM;
+ goto fail;
+ }
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ error = -ENOMEM;
+ goto fail_nomem;
+ }
+
+ 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;
+ error = input_register_device(input_dev);
+ if (error)
+ goto fail_register;
+
+ mdev->driver = mdrv;
+ maple_set_drvdata(mdev, mse);
+
+ maple_getcond_callback(mdev, dc_mouse_callback, HZ/50,
+ MAPLE_FUNC_MOUSE);
+
+ return error;
+
+fail_register:
+ input_free_device(input_dev);
+fail_nomem:
+ kfree(mse);
+fail:
+ 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 = 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);


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