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Input: xpad - add support for leds on xbox 360 pad
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Export LEDs on Xbox360 pad via led subsystem as a single device in
/sys/class/leds/xpad[0-9]+.

Xbox360 pad has four leds, which form a circle. Unfortunately the leds
can't be controlled independently and can only display a predefined
set of patterns (for example one is turned on wile others are off or
a rotating pattern - 1-2-3-4). To activate a pattern one needs to send
a specific command to the device (see http://www.free60.org/wiki/Gamepad).

Led subsystem allows us to set brightness, but there is nothing like
brightness on this device. So brightness is actually interpreted as
the command (only values between 0 and 14 are accepted).

Signed-off-by: Jan Kratochvil <honza@jikos.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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Jan Kratochvil authored and Dmitry Torokhov committed Jul 18, 2007
1 parent cb32da0 commit 4994cd8
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Showing 2 changed files with 155 additions and 42 deletions.
7 changes: 7 additions & 0 deletions drivers/input/joystick/Kconfig
View file
Original file line number Diff line number Diff line change
Expand Up @@ -275,4 +275,11 @@ config JOYSTICK_XPAD_FF
---help---
Say Y here if you want to take advantage of xbox 360 rumble features.

config JOYSTICK_XPAD_LEDS
bool "LED Support for Xbox360 controller 'BigX' LED"
depends on LEDS_CLASS && JOYSTICK_XPAD
---help---
This option enables support for the LED which surrounds the Big X on
XBox 360 controller.

endif
190 changes: 148 additions & 42 deletions drivers/input/joystick/xpad.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -191,13 +191,18 @@ struct usb_xpad {
unsigned char *idata; /* input data */
dma_addr_t idata_dma;

#ifdef CONFIG_JOYSTICK_XPAD_FF
#if defined(CONFIG_JOYSTICK_XPAD_FF) || defined(CONFIG_JOYSTICK_XPAD_LEDS)
struct urb *irq_out; /* urb for interrupt out report */
unsigned char *odata; /* output data */
dma_addr_t odata_dma;
struct mutex odata_mutex;
#endif

#if defined(CONFIG_JOYSTICK_XPAD_LEDS)
struct xpad_led *led;
#endif

char phys[65]; /* physical device path */
char phys[64]; /* physical device path */

int dpad_mapping; /* map d-pad to buttons or to axes */
int xtype; /* type of xbox device */
Expand Down Expand Up @@ -349,7 +354,7 @@ static void xpad_irq_in(struct urb *urb)
__FUNCTION__, retval);
}

#ifdef CONFIG_JOYSTICK_XPAD_FF
#if defined(CONFIG_JOYSTICK_XPAD_FF) || defined(CONFIG_JOYSTICK_XPAD_LEDS)
static void xpad_irq_out(struct urb *urb)
{
int retval;
Expand All @@ -376,29 +381,7 @@ static void xpad_irq_out(struct urb *urb)
__FUNCTION__, retval);
}

static int xpad_play_effect(struct input_dev *dev, void *data,
struct ff_effect *effect)
{
struct usb_xpad *xpad = input_get_drvdata(dev);

if (effect->type == FF_RUMBLE) {
__u16 strong = effect->u.rumble.strong_magnitude;
__u16 weak = effect->u.rumble.weak_magnitude;
xpad->odata[0] = 0x00;
xpad->odata[1] = 0x08;
xpad->odata[2] = 0x00;
xpad->odata[3] = strong / 256;
xpad->odata[4] = weak / 256;
xpad->odata[5] = 0x00;
xpad->odata[6] = 0x00;
xpad->odata[7] = 0x00;
usb_submit_urb(xpad->irq_out, GFP_KERNEL);
}

return 0;
}

static int xpad_init_ff(struct usb_interface *intf, struct usb_xpad *xpad)
static int xpad_init_output(struct usb_interface *intf, struct usb_xpad *xpad)
{
struct usb_endpoint_descriptor *ep_irq_out;
int error = -ENOMEM;
Expand All @@ -411,6 +394,8 @@ static int xpad_init_ff(struct usb_interface *intf, struct usb_xpad *xpad)
if (!xpad->odata)
goto fail1;

mutex_init(&xpad->odata_mutex);

xpad->irq_out = usb_alloc_urb(0, GFP_KERNEL);
if (!xpad->irq_out)
goto fail2;
Expand All @@ -423,39 +408,150 @@ static int xpad_init_ff(struct usb_interface *intf, struct usb_xpad *xpad)
xpad->irq_out->transfer_dma = xpad->odata_dma;
xpad->irq_out->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

input_set_capability(xpad->dev, EV_FF, FF_RUMBLE);

error = input_ff_create_memless(xpad->dev, NULL, xpad_play_effect);
if (error)
goto fail2;

return 0;

fail2: usb_buffer_free(xpad->udev, XPAD_PKT_LEN, xpad->odata, xpad->odata_dma);
fail1: return error;
}

static void xpad_stop_ff(struct usb_xpad *xpad)
static void xpad_stop_output(struct usb_xpad *xpad)
{
if (xpad->xtype == XTYPE_XBOX360)
usb_kill_urb(xpad->irq_out);
}

static void xpad_deinit_ff(struct usb_xpad *xpad)
static void xpad_deinit_output(struct usb_xpad *xpad)
{
if (xpad->xtype == XTYPE_XBOX360) {
usb_free_urb(xpad->irq_out);
usb_buffer_free(xpad->udev, XPAD_PKT_LEN,
xpad->odata, xpad->odata_dma);
}
}
#else
static int xpad_init_output(struct usb_interface *intf, struct usb_xpad *xpad) { return 0; }
static void xpad_deinit_output(struct usb_xpad *xpad) {}
static void xpad_stop_output(struct usb_xpad *xpad) {}
#endif

#ifdef CONFIG_JOYSTICK_XPAD_FF
static int xpad_play_effect(struct input_dev *dev, void *data,
struct ff_effect *effect)
{
struct usb_xpad *xpad = input_get_drvdata(dev);

if (effect->type == FF_RUMBLE) {
__u16 strong = effect->u.rumble.strong_magnitude;
__u16 weak = effect->u.rumble.weak_magnitude;
xpad->odata[0] = 0x00;
xpad->odata[1] = 0x08;
xpad->odata[2] = 0x00;
xpad->odata[3] = strong / 256;
xpad->odata[4] = weak / 256;
xpad->odata[5] = 0x00;
xpad->odata[6] = 0x00;
xpad->odata[7] = 0x00;
usb_submit_urb(xpad->irq_out, GFP_KERNEL);
}

return 0;
}

static int xpad_init_ff(struct usb_xpad *xpad)
{
input_set_capability(xpad->dev, EV_FF, FF_RUMBLE);

return input_ff_create_memless(xpad->dev, NULL, xpad_play_effect);
}

#else
static int xpad_init_ff(struct usb_xpad *xpad) { return 0; }
#endif

#if defined(CONFIG_JOYSTICK_XPAD_LEDS)
#include <linux/leds.h>

struct xpad_led {
char name[16];
struct led_classdev led_cdev;
struct usb_xpad *xpad;
};

static void xpad_send_led_command(struct usb_xpad *xpad, int command)
{
if (command >= 0 && command < 14) {
mutex_lock(&xpad->odata_mutex);
xpad->odata[0] = 0x01;
xpad->odata[1] = 0x03;
xpad->odata[2] = command;
usb_submit_urb(xpad->irq_out, GFP_KERNEL);
mutex_unlock(&xpad->odata_mutex);
}
}

static void xpad_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct xpad_led *xpad_led = container_of(led_cdev,
struct xpad_led, led_cdev);

xpad_send_led_command(xpad_led->xpad, value);
}

static int xpad_led_probe(struct usb_xpad *xpad)
{
static atomic_t led_seq = ATOMIC_INIT(0);
long led_no;
struct xpad_led *led;
struct led_classdev *led_cdev;
int error;

if (xpad->xtype != XTYPE_XBOX360)
return 0;

xpad->led = led = kzalloc(sizeof(struct xpad_led), GFP_KERNEL);
if (!led)
return -ENOMEM;

led_no = (long)atomic_inc_return(&led_seq) - 1;

snprintf(led->name, sizeof(led->name), "xpad%ld", led_no);
led->xpad = xpad;

led_cdev = &led->led_cdev;
led_cdev->name = led->name;
led_cdev->brightness_set = xpad_led_set;

error = led_classdev_register(&xpad->udev->dev, led_cdev);
if (error) {
kfree(led);
xpad->led = NULL;
return error;
}

/*
* Light up the segment corresponding to controller number
*/
xpad_send_led_command(xpad, (led_no % 4) + 2);

return 0;
}

static void xpad_led_disconnect(struct usb_xpad *xpad)
{
struct xpad_led *xpad_led = xpad->led;

if (xpad_led) {
led_classdev_unregister(&xpad_led->led_cdev);
kfree(xpad_led->name);
}
}
#else
static int xpad_init_ff(struct usb_interface *intf, struct usb_xpad *xpad) { return 0; }
static void xpad_stop_ff(struct usb_xpad *xpad) { }
static void xpad_deinit_ff(struct usb_xpad *xpad) { }
static int xpad_led_probe(struct usb_xpad *xpad) { return 0; }
static void xpad_led_disconnect(struct usb_xpad *xpad) { }
#endif


static int xpad_open(struct input_dev *dev)
{
struct usb_xpad *xpad = input_get_drvdata(dev);
Expand All @@ -472,7 +568,7 @@ static void xpad_close(struct input_dev *dev)
struct usb_xpad *xpad = input_get_drvdata(dev);

usb_kill_urb(xpad->irq_in);
xpad_stop_ff(xpad);
xpad_stop_output(xpad);
}

static void xpad_set_up_abs(struct input_dev *input_dev, signed short abs)
Expand Down Expand Up @@ -564,10 +660,18 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id
for (i = 0; xpad_abs_pad[i] >= 0; i++)
xpad_set_up_abs(input_dev, xpad_abs_pad[i]);

error = xpad_init_ff(intf, xpad);
error = xpad_init_output(intf, xpad);
if (error)
goto fail2;

error = xpad_init_ff(xpad);
if (error)
goto fail3;

error = xpad_led_probe(xpad);
if (error)
goto fail3;

ep_irq_in = &intf->cur_altsetting->endpoint[0].desc;
usb_fill_int_urb(xpad->irq_in, udev,
usb_rcvintpipe(udev, ep_irq_in->bEndpointAddress),
Expand All @@ -578,12 +682,13 @@ static int xpad_probe(struct usb_interface *intf, const struct usb_device_id *id

error = input_register_device(xpad->dev);
if (error)
goto fail3;
goto fail4;

usb_set_intfdata(intf, xpad);
return 0;

fail3: usb_free_urb(xpad->irq_in);
fail4: usb_free_urb(xpad->irq_in);
fail3: xpad_deinit_output(xpad);
fail2: usb_buffer_free(udev, XPAD_PKT_LEN, xpad->idata, xpad->idata_dma);
fail1: input_free_device(input_dev);
kfree(xpad);
Expand All @@ -597,8 +702,9 @@ static void xpad_disconnect(struct usb_interface *intf)

usb_set_intfdata(intf, NULL);
if (xpad) {
xpad_led_disconnect(xpad);
input_unregister_device(xpad->dev);
xpad_deinit_ff(xpad);
xpad_deinit_output(xpad);
usb_free_urb(xpad->irq_in);
usb_buffer_free(xpad->udev, XPAD_PKT_LEN,
xpad->idata, xpad->idata_dma);
Expand Down

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