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Subject[PATCH] input: add support for SEGA Dreamcast controller as joystick
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Use a Maple controller as a joystick device.

Signed-off-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
---
diff -ruN a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
--- a/drivers/input/joystick/Kconfig 2008-05-18 20:04:42.000000000 +0100
+++ b/drivers/input/joystick/Kconfig 2008-05-18 19:53:42.000000000 +0100
@@ -294,4 +294,17 @@
This option enables support for the LED which surrounds the Big X on
XBox 360 controller.

+config JOYSTICK_MAPLE
+ tristate "Dreamcast control pad"
+ depends on SH_DREAMCAST
+ select MAPLE
+ help
+ Say Y here if you have a SEGA Dreamcast and want to use your
+ controller.
+
+ Most Dreamcast users will say Y.
+
+ To compile this as a module choose M here: the
+ module will be called maplecontrol.
+
endif
diff -ruN a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile
--- a/drivers/input/joystick/Makefile 2008-05-18 20:04:42.000000000 +0100
+++ b/drivers/input/joystick/Makefile 2008-05-18 19:53:42.000000000 +0100
@@ -19,6 +19,7 @@
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 -ruN a/drivers/input/joystick/maplecontrol.c b/drivers/input/joystick/maplecontrol.c
--- a/drivers/input/joystick/maplecontrol.c 1970-01-01 01:00:00.000000000 +0100
+++ b/drivers/input/joystick/maplecontrol.c 2008-05-18 19:53:42.000000000 +0100
@@ -0,0 +1,217 @@
+/*
+ * SEGA Dreamcast controller driver
+ * Based on drivers/usb/iforce.c
+ *
+ * Copyright Yaegashi Takeshi, 2001
+ * Porting to 2.6 by Adrian McMenamin, copyright 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>
+#include <asm/mach/maple.h>
+
+MODULE_AUTHOR("YAEGASHI Takeshi <t@keshi.org>");
+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 = mapledev->private_data;
+ struct input_dev *dev = pad->dev;
+ unsigned char *res = mq->recvbuf;
+
+ buttons = ~cpu_to_le16(*(unsigned short *)(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 void dc_pad_disconnect(struct maple_device *mdev)
+{
+ struct dc_pad *pad = mdev->private_data;
+
+ mdev->callback = NULL;
+ input_unregister_device(pad->dev);
+ kfree(pad);
+}
+
+static int dc_pad_open(struct input_dev *dev)
+{
+ struct dc_pad *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;
+
+ pad = dev->dev.platform_data;
+ maple_getcond_callback(pad->mdev, dc_pad_callback, 0,
+ MAPLE_FUNC_CONTROLLER);
+}
+
+static int dc_pad_connect(struct maple_device *mdev)
+{
+ int i, error;
+ unsigned long data = be32_to_cpu(mdev->devinfo.function_data[0]);
+ struct dc_pad *pad;
+ struct input_dev *dev;
+
+ 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,
+ };
+
+ 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,
+ };
+
+ pad = kzalloc(sizeof(struct dc_pad), GFP_KERNEL);
+ if (!pad){
+ error = ENOMEM;
+ goto fail_nomem_1;
+ }
+
+ dev = input_allocate_device();
+ if (!dev) {
+ error = ENOMEM;
+ goto fail_nomem_2;
+ }
+
+ pad->dev = dev;
+ pad->mdev = mdev;
+ mdev->private_data = pad;
+ dev->open = dc_pad_open;
+ dev->close = dc_pad_close;
+
+ for (i = 0; i < 32; i++)
+ if (data & (1<<i) && btn_bit[i] >= 0)
+ dev->keybit[BIT_WORD(BTN_JOYSTICK)] |= BIT_MASK(btn_bit[i]);
+
+ if (dev->keybit[BTN_JOYSTICK/32])
+ dev->evbit[0] |= BIT_MASK(EV_KEY);
+
+ for (i = 0; i < 32; i++)
+ if (data & (1<<i) && abs_bit[i] >= 0)
+ dev->absbit[0] |= BIT_MASK(abs_bit[i]);
+
+ if (dev->absbit[0])
+ dev->evbit[0] |= BIT_MASK(EV_ABS);
+
+ for (i = ABS_X; i <= ABS_BRAKE; i++)
+ input_set_abs_params(dev, i, 0, 255, 0, 0);
+
+ for (i = ABS_HAT0X; i <= ABS_HAT3Y; i++)
+ input_set_abs_params(dev, i, 1, -1, 0, 0);
+
+ dev->dev.platform_data = pad;
+ dev->event = NULL;
+ dev->dev.parent = &mdev->dev;
+ dev->name = mdev->product_name;
+ dev->id.bustype = BUS_HOST;
+ input_set_drvdata(dev, pad);
+
+ error = input_register_device(dev);
+ if (error)
+ goto fail_register;
+
+ return error;
+
+fail_register:
+ input_free_device(pad->dev);
+fail_nomem_2:
+ kfree(pad);
+fail_nomem_1:
+ return -error;
+}
+
+/* allow the controller to be used */
+static int probe_maple_controller(struct device *dev)
+{
+ struct maple_device *mdev = to_maple_dev(dev);
+ struct maple_driver *mdrv = to_maple_driver(dev->driver);
+ int error;
+
+ error = dc_pad_connect(mdev);
+ if (error)
+ return error;
+
+ mdev->driver = mdrv;
+
+ return 0;
+}
+
+static int remove_maple_controller(struct device *dev)
+{
+ struct maple_device *mdev = to_maple_dev(dev);
+
+ dc_pad_disconnect(mdev);
+ return 0;
+}
+
+static struct maple_driver dc_pad_driver = {
+ .function = MAPLE_FUNC_CONTROLLER,
+ .connect = dc_pad_connect,
+ .disconnect = dc_pad_disconnect,
+ .drv = {
+ .name = "Dreamcast_controller",
+ .probe = probe_maple_controller,
+ .remove = remove_maple_controller,
+ },
+};
+
+static int __init dc_pad_init(void)
+{
+ return maple_driver_register(&dc_pad_driver.drv);
+}
+
+static void __exit dc_pad_exit(void)
+{
+ driver_unregister(&dc_pad_driver.drv);
+}
+
+module_init(dc_pad_init);
+module_exit(dc_pad_exit);



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