diff mbox series

[v3] staging: HID: Add ShanWan USB WirelessGamepad driver

Message ID fd1961a773558930b6ae0aa2f6fc7f84833ee634.1681131540.git.ahmubashshir@gmail.com (mailing list archive)
State Superseded
Delegated to: Jiri Kosina
Headers show
Series [v3] staging: HID: Add ShanWan USB WirelessGamepad driver | expand

Commit Message

Mubashshir April 10, 2023, 12:59 p.m. UTC 
This device has a quirky initialization process.
Depending on how it was initialized, behaves completely differently.
In default mode, it behaves as expected, but in fallback it disables
force-feedback, analog stick configurations and L3/R3.

Signed-off-by: Huseyin BIYIK <huseyinbiyik@hotmail.com>
Signed-off-by: Mubashshir <ahmubashshir@gmail.com>
---
v3: Another missed semicolon

 drivers/hid/Kconfig       |  19 +++
 drivers/hid/Makefile      |   1 +
 drivers/hid/hid-ids.h     |   3 +
 drivers/hid/hid-shanwan.c | 256 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 279 insertions(+)
 create mode 100644 drivers/hid/hid-shanwan.c

Comments

Benjamin Tissoires April 13, 2023, 4:13 p.m. UTC | #1 
On Apr 10 2023, Mubashshir wrote:
> This device has a quirky initialization process.
> Depending on how it was initialized, behaves completely differently.
> In default mode, it behaves as expected, but in fallback it disables
> force-feedback, analog stick configurations and L3/R3.
> 
> Signed-off-by: Huseyin BIYIK <huseyinbiyik@hotmail.com>
> Signed-off-by: Mubashshir <ahmubashshir@gmail.com>
> ---
> v3: Another missed semicolon
> 
>  drivers/hid/Kconfig       |  19 +++
>  drivers/hid/Makefile      |   1 +
>  drivers/hid/hid-ids.h     |   3 +
>  drivers/hid/hid-shanwan.c | 256 ++++++++++++++++++++++++++++++++++++++
>  4 files changed, 279 insertions(+)
>  create mode 100644 drivers/hid/hid-shanwan.c
> 
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index 82f64fb31fda..a17db9c9694c 100644
> --- a/drivers/hid/Kconfig
> +++ b/drivers/hid/Kconfig
> @@ -990,6 +990,25 @@ config HID_SEMITEK
>  	- Woo-dy
>  	- X-Bows Nature/Knight
>  
> +config HID_SHANWAN
> +	tristate "ShanWan USB WirelessGamepad"
> +	depends on USB_HID
> +	help
> +	Support for Shanwan USB WirelessGamepad (and clones).
> +
> +	This device has a quirky initialization process.
> +	Depending on how it was initialized, it behaves completely differently.
> +	In default mode, it behaves as expected, but in fallback it disables
> +	force-feedback, analog stick configurations and L3/R3.
> +
> +config SHANWAN_FF
> +	bool "ShanWan USB WirelessGamepad force feedback support"
> +	depends on HID_SHANWAN
> +	select INPUT_FF_MEMLESS
> +	help
> +	Say Y here if you have a ShanWan USB WirelessGamepad and want to enable
> +	force feedback support for it.
> +
>  config HID_SIGMAMICRO
>  	tristate "SiGma Micro-based keyboards"
>  	depends on USB_HID
> diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
> index 5d37cacbde33..52878455fc10 100644
> --- a/drivers/hid/Makefile
> +++ b/drivers/hid/Makefile
> @@ -116,6 +116,7 @@ obj-$(CONFIG_HID_RMI)		+= hid-rmi.o
>  obj-$(CONFIG_HID_SAITEK)	+= hid-saitek.o
>  obj-$(CONFIG_HID_SAMSUNG)	+= hid-samsung.o
>  obj-$(CONFIG_HID_SEMITEK)	+= hid-semitek.o
> +obj-$(CONFIG_HID_SHANWAN)	+= hid-shanwan.o
>  obj-$(CONFIG_HID_SIGMAMICRO)	+= hid-sigmamicro.o
>  obj-$(CONFIG_HID_SMARTJOYPLUS)	+= hid-sjoy.o
>  obj-$(CONFIG_HID_SONY)		+= hid-sony.o
> diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
> index 63545cd307e5..278914e37eb7 100644
> --- a/drivers/hid/hid-ids.h
> +++ b/drivers/hid/hid-ids.h
> @@ -623,6 +623,9 @@
>  #define USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE_0641	0x0641
>  #define USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE_1f4a	0x1f4a
>  
> +#define USB_VENDOR_ID_SHANWAN 0x2563
> +#define USB_PRODUCT_ID_SHANWAN_USB_WIRELESSGAMEPAD 0x0575
> +
>  #define USB_VENDOR_ID_HUION		0x256c
>  #define USB_DEVICE_ID_HUION_TABLET	0x006e
>  #define USB_DEVICE_ID_HUION_TABLET2	0x006d
> diff --git a/drivers/hid/hid-shanwan.c b/drivers/hid/hid-shanwan.c
> new file mode 100644
> index 000000000000..39c1bb6f40c6
> --- /dev/null
> +++ b/drivers/hid/hid-shanwan.c
> @@ -0,0 +1,256 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Force feedback support for Shanwan USB WirelessGamepad
> + *
> + * Copyright (c) 2022-2023	Huseyin BIYIK	<huseyinbiyik@hotmail.com>
> + * Copyright (c) 2023	Ahmad Hasan Mubashshir	<ahmubashshir@gmail.com>
> + *
> + * mapping according to Gamepad Protocol
> + *
> + * Button 01: BTN_SOUTH (CROSS)
> + * Button 02: BTN_EAST(CIRCLE)
> + * Button 03: BTN_NORTH (TRIANGLE)
> + * Button 04: BTN_WEST (SQUARE)
> + * Button 05: BTL_TL (L1)
> + * Button 06: BTM_TR (R1)
> + * Button 07: BTN_TL2 (L2)
> + * Button 08: BTN_TR2 (R2)
> + * Button 09: BTN_SELECT
> + * Button 10: BTN_START
> + * Button 11: BTN_MODE
> + * Button 12: BTN_THUMBL (LS1)
> + * Button 13: BTN_THUMBR (LS1)
> + * LS1: X/Y AXIS
> + * LS2: Rx/Ry AXIS
> + * R2/L2 Touch Sensors: R/Rz
> + */
> +
> +#include <linux/input.h>
> +#include <linux/slab.h>
> +#include <linux/hid.h>
> +#include <linux/module.h>
> +#include <linux/types.h>
> +#include <linux/moduleparam.h>
> +
> +#include "hid-ids.h"
> +
> +#define PID0575_RDESC_ORIG_SIZE 137
> +
> +static bool swap_motors;
> +module_param_named(swap, swap_motors, bool, 0);
> +MODULE_PARM_DESC(swap, "Swap Weak/Strong Feedback motors");
> +
> +static __u8 pid0575_rdesc_fixed[] = {
> +	0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
> +	0x09, 0x05, // Usage (Game Pad)
> +	0xA1, 0x01, // Collection (Application)
> +	0x15, 0x00, // Logical Minimum (0)
> +	0x25, 0x01, // Logical Maximum (1)
> +	0x35, 0x00, // Physical Minimum (0)
> +	0x45, 0x01, // Physical Maximum (1)
> +	0x75, 0x01, // Report Size (1)
> +	0x95, 0x0D, // Report Count (13)
> +	0x05, 0x09, // Usage Page (Button)
> +	0x09, 0x03, // Usage (BTN_NORTH)
> +	0x09, 0x02, // Usage (BTN_EAST)
> +	0x09, 0x01, // Usage (BTN_SOUTH)
> +	0x09, 0x04, // Usage (BTN_WEST)
> +	0x09, 0x05, // Usage (BTN_TL)
> +	0x09, 0x06, // Usage (BTN_TR)
> +	0x09, 0x07, // Usage (BTN_TL2)
> +	0x09, 0x08, // Usage (BTN_TR2)
> +	0x09, 0x09, // Usage (BTN_SELECT)
> +	0x09, 0x10, // Usage (BTN_START)
> +	0x09, 0x12, // Usage (BTN_THUMBL)
> +	0x09, 0x13, // Usage (BTN_THUMBR)
> +	0x09, 0x11, // Usage (BTN_MODE)
> +	0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,PreferredState,NoNullPosition)
> +	0x75, 0x01, // Report Size (1)
> +	0x95, 0x03, // Report Count (3)
> +	0x81, 0x01, // Input (Const,Array,Abs,No Wrap,Linear,PreferredState,NoNullPosition)
> +	0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
> +	0x25, 0x07, // Logical Maximum (7)
> +	0x46, 0x3B, 0x01, // Physical Maximum (315)
> +	0x75, 0x04, // Report Size (4)
> +	0x95, 0x01, // Report Count (1)
> +	0x65, 0x14, // Unit (System: English Rotation, Length: Centimeter)
> +	0x09, 0x39, // Usage (Hat switch)
> +	0x81, 0x42, // Input (Data,Var,Abs,No Wrap,Linear,PreferredState,NullState)
> +	0x65, 0x00, // Unit (None)
> +	0x95, 0x01, // Report Count (1)
> +	0x81, 0x01, // Input(Const,Array,Abs,NoWrap,Linear,PreferredState,NoNullPosition)
> +	0x26, 0xFF, 0x00, // Logical Maximum (255)
> +	0x46, 0xFF, 0x00, // Physical Maximum (255)
> +	0x09, 0x30, // Usage (X)
> +	0x09, 0x31, // Usage (Y)
> +	0x09, 0x33, // Usage (Rx)
> +	0x09, 0x34, // Usage (Ry)
> +	0x75, 0x08, // Report Size (8)
> +	0x95, 0x04, // Report Count (4)
> +	0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,PreferredState,NoNullPosition)
> +	0x95, 0x0A, // Report Count (10)
> +	0x81, 0x01, // Input (Const,Array,Abs,No Wrap,Linear,PreferredState,NoNullPosition)
> +	0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
> +	0x26, 0xFF, 0x00, // Logical Maximum (255)
> +	0x46, 0xFF, 0x00, // Physical Maximum (255)
> +	0x09, 0x32, // Usage (Z)
> +	0x09, 0x35, // Usage (Rz)
> +	0x95, 0x02, // Report Count (2)
> +	0x81, 0x02, // Input(Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
> +	0x95, 0x08, // Report Count (8)
> +	0x81, 0x01, // Input(Const,Array,Abs,NoWrap,Linear,PreferredState,NoNullPosition)
> +	0x06, 0x00, 0xFF, // Usage Page (Vendor Defined 0xFF00)
> +	0xB1, 0x02, // Feature(Data,Var,Abs,No Wrap,Linear,PreferredState,NoNullPosition,!volatile)
> +	0x0A, 0x21, 0x26, // Usage (0x2621)
> +	0x95, 0x08, // Report Count (8)
> +	0x91, 0x02, // Output(Data,Var,Abs,No Wrap,Linear,PreferredState,NoNullPosition,!volatile)
> +	0x0A, 0x21, 0x26, // Usage (0x2621)
> +	0x95, 0x08, // Report Count (8)
> +	0x81, 0x02, // Input(Data,Var,Abs,No Wrap,Linear,Preferred State,NoNullPosition)
> +	0xC0,       // End Collection
> +};
> +
> +struct shanwan_device {
> +	struct hid_report *report;
> +};
> +
> +#ifdef CONFIG_SHANWAN_FF
> +static int shanwan_play_effect(struct input_dev *dev, void *data, struct ff_effect *effect)
> +{
> +	struct hid_device *hid = input_get_drvdata(dev);
> +	struct shanwan_device *shanwan = data;
> +	struct hid_report *report = shanwan->report;
> +
> +	if (effect->type != FF_RUMBLE)
> +		return 0;
> +
> +	report->field[0]->value[0] = 0x02; /* 2 = rumble effect message */
> +	report->field[0]->value[1] = 0x08; /* reserved value, always 8 */
> +	if (swap_motors) {
> +		/* weak rumble / strong rumble */
> +		report->field[0]->value[2] = effect->u.rumble.strong_magnitude / 256;
> +		report->field[0]->value[3] = effect->u.rumble.weak_magnitude / 256;
> +	} else {
> +		/* strong rumble / weak rumble */
> +		report->field[0]->value[2] = effect->u.rumble.weak_magnitude / 256;
> +		report->field[0]->value[3] = effect->u.rumble.strong_magnitude / 256;
> +	}
> +	report->field[0]->value[4] = 0xff; /* duration 0-254 (255 = nonstop) */
> +	report->field[0]->value[5] = 0x00; /* padding */
> +	report->field[0]->value[6] = 0x00; /* padding */
> +	report->field[0]->value[7] = 0x00; /* padding */
> +	hid_hw_request(hid, report, HID_REQ_SET_REPORT);

I see some other drivers using a workqueue here because ->play() can be
called in atomic context. Are you sure you can sleep here?

> +
> +	return 0;
> +}
> +
> +static int shanwan_init_ff(struct hid_device *hid)
> +{
> +	struct shanwan_device *shanwan;
> +	struct hid_report *report;
> +	struct hid_input *hidinput;
> +	struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
> +	struct input_dev *dev;
> +
> +	if (list_empty(&hid->inputs)) {
> +		hid_err(hid, "no inputs found\n");
> +		return -ENODEV;
> +	}
> +	hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
> +	dev = hidinput->input;
> +
> +	if (list_empty(report_list)) {
> +		hid_err(hid, "no output reports found\n");
> +		return -ENODEV;
> +	}
> +
> +	report = list_first_entry(report_list, struct hid_report, list);
> +
> +	shanwan = kzalloc(sizeof(*shanwan), GFP_KERNEL);
> +	if (!shanwan)
> +		return -ENOMEM;
> +
> +	set_bit(FF_RUMBLE, dev->ffbit);
> +
> +	if (input_ff_create_memless(dev, shanwan, shanwan_play_effect)) {
> +		kfree(shanwan);
> +		return -ENODEV;
> +	}
> +
> +	shanwan->report = report;
> +
> +	return 0;
> +}
> +#else
> +static int shanwan_init_ff(struct hid_device *hid)
> +{
> +	return 0;
> +}
> +#endif
> +
> +static int shanwan_probe(struct hid_device *hdev, const struct hid_device_id *id)
> +{
> +	int error;
> +
> +	error = hid_parse(hdev);
> +	if (error) {
> +		hid_err(hdev, "parse failed\n");
> +		return error;
> +	}
> +
> +	error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
> +	if (error) {
> +		hid_err(hdev, "hw start failed\n");
> +		return error;
> +	}
> +
> +	error = shanwan_init_ff(hdev);
> +	if (error)
> +		hid_warn(hdev, "Failed to enable force feedback support, error: %d\n", error);
> +
> +	error = hid_hw_open(hdev);

What's the point of keeping it opened for the lifetime of the device? Do
you really need this?

> +	if (error) {
> +		dev_err(&hdev->dev, "hw open failed\n");
> +		hid_hw_stop(hdev);
> +		return error;
> +	}
> +
> +	return 0;
> +}
> +
> +static void shanwan_remove(struct hid_device *hdev)
> +{
> +	hid_hw_close(hdev);

If you can drop the last hid_hw_open/close, then you can entirely skip
the ->remove().

Cheers,
Benjamin

> +	hid_hw_stop(hdev);
> +}
> +
> +static __u8 *shanwan_report_fixup(struct hid_device *hid, __u8 *rdesc, unsigned int *rsize)
> +{
> +	if (*rsize == PID0575_RDESC_ORIG_SIZE) {
> +		rdesc = pid0575_rdesc_fixed;
> +		*rsize = sizeof(pid0575_rdesc_fixed);
> +	} else {
> +		hid_warn(hid, "unexpected rdesc, please submit for review\n");
> +	}
> +	return rdesc;
> +}
> +
> +static const struct hid_device_id shanwan_devices[] = {
> +	{ HID_USB_DEVICE(USB_VENDOR_ID_SHANWAN, USB_PRODUCT_ID_SHANWAN_USB_WIRELESSGAMEPAD) },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(hid, shanwan_devices);
> +
> +static struct hid_driver shanwan_driver = {
> +	.name			= "shanwan",
> +	.id_table		= shanwan_devices,
> +	.probe			= shanwan_probe,
> +	.report_fixup		= shanwan_report_fixup,
> +	.remove			= shanwan_remove,
> +};
> +module_hid_driver(shanwan_driver);
> +
> +MODULE_AUTHOR("Huseyin BIYIK <huseyinbiyik@hotmail.com>");
> +MODULE_AUTHOR("Ahmad Hasan Mubashshir <ahmubashshir@gmail.com>");
> +MODULE_DESCRIPTION("Force feedback support for Shanwan USB WirelessGamepad");
> +MODULE_LICENSE("GPL");
> -- 
> 2.40.0
>
Mubashshir April 19, 2023, 6:36 a.m. UTC | #2 
On Thu, Apr 13 2023 at 06:13:05 PM +02:00:00, Benjamin Tissoires 
<benjamin.tissoires@redhat.com> wrote:
> What's the point of keeping it opened for the lifetime of the device? 
> Do
> you really need this?
> 
>>  +	if (error) {
>>  +		dev_err(&hdev->dev, "hw open failed\n");
>>  +		hid_hw_stop(hdev);
>>  +		return error;
>>  +	}
>>  +
>>  +	return 0;
>>  +}
>>  +
>>  +static void shanwan_remove(struct hid_device *hdev)
>>  +{
>>  +	hid_hw_close(hdev);
> 
> If you can drop the last hid_hw_open/close, then you can entirely skip
> the ->remove().

Would hid_hw_request work without open device?
Benjamin Tissoires April 25, 2023, 9:04 a.m. UTC | #3 
On Apr 19 2023, Mubashshir wrote:
> On Thu, Apr 13 2023 at 06:13:05 PM +02:00:00, Benjamin Tissoires
> <benjamin.tissoires@redhat.com> wrote:
> > What's the point of keeping it opened for the lifetime of the device? Do
> > you really need this?
> > 
> > >  +	if (error) {
> > >  +		dev_err(&hdev->dev, "hw open failed\n");
> > >  +		hid_hw_stop(hdev);
> > >  +		return error;
> > >  +	}
> > >  +
> > >  +	return 0;
> > >  +}
> > >  +
> > >  +static void shanwan_remove(struct hid_device *hdev)
> > >  +{
> > >  +	hid_hw_close(hdev);
> > 
> > If you can drop the last hid_hw_open/close, then you can entirely skip
> > the ->remove().
> 
> Would hid_hw_request work without open device?

No, it won't work if the device is not opened. But what's the point of
sending rumble data to the joystick if the device is not opened (so used)
by anybody? open() is called whenever a client opens the device, by
accessing the evdev node, so I think it should be fine.

Cheers,
Benjamin
Mubashshir April 25, 2023, 9:06 a.m. UTC | #4 
On Tue, Apr 25 2023 at 11:04:43 AM +02:00:00, Benjamin Tissoires 
<benjamin.tissoires@redhat.com> wrote:
> No, it won't work if the device is not opened. But what's the point of
> sending rumble data to the joystick if the device is not opened (so 
> used)
> by anybody? open() is called whenever a client opens the device, by
> accessing the evdev node, so I think it should be fine.

I'll test it tonight...
diff mbox series

Patch

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 82f64fb31fda..a17db9c9694c 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -990,6 +990,25 @@  config HID_SEMITEK
 	- Woo-dy
 	- X-Bows Nature/Knight
 
+config HID_SHANWAN
+	tristate "ShanWan USB WirelessGamepad"
+	depends on USB_HID
+	help
+	Support for Shanwan USB WirelessGamepad (and clones).
+
+	This device has a quirky initialization process.
+	Depending on how it was initialized, it behaves completely differently.
+	In default mode, it behaves as expected, but in fallback it disables
+	force-feedback, analog stick configurations and L3/R3.
+
+config SHANWAN_FF
+	bool "ShanWan USB WirelessGamepad force feedback support"
+	depends on HID_SHANWAN
+	select INPUT_FF_MEMLESS
+	help
+	Say Y here if you have a ShanWan USB WirelessGamepad and want to enable
+	force feedback support for it.
+
 config HID_SIGMAMICRO
 	tristate "SiGma Micro-based keyboards"
 	depends on USB_HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 5d37cacbde33..52878455fc10 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -116,6 +116,7 @@  obj-$(CONFIG_HID_RMI)		+= hid-rmi.o
 obj-$(CONFIG_HID_SAITEK)	+= hid-saitek.o
 obj-$(CONFIG_HID_SAMSUNG)	+= hid-samsung.o
 obj-$(CONFIG_HID_SEMITEK)	+= hid-semitek.o
+obj-$(CONFIG_HID_SHANWAN)	+= hid-shanwan.o
 obj-$(CONFIG_HID_SIGMAMICRO)	+= hid-sigmamicro.o
 obj-$(CONFIG_HID_SMARTJOYPLUS)	+= hid-sjoy.o
 obj-$(CONFIG_HID_SONY)		+= hid-sony.o
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 63545cd307e5..278914e37eb7 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -623,6 +623,9 @@ 
 #define USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE_0641	0x0641
 #define USB_PRODUCT_ID_HP_PIXART_OEM_USB_OPTICAL_MOUSE_1f4a	0x1f4a
 
+#define USB_VENDOR_ID_SHANWAN 0x2563
+#define USB_PRODUCT_ID_SHANWAN_USB_WIRELESSGAMEPAD 0x0575
+
 #define USB_VENDOR_ID_HUION		0x256c
 #define USB_DEVICE_ID_HUION_TABLET	0x006e
 #define USB_DEVICE_ID_HUION_TABLET2	0x006d
diff --git a/drivers/hid/hid-shanwan.c b/drivers/hid/hid-shanwan.c
new file mode 100644
index 000000000000..39c1bb6f40c6
--- /dev/null
+++ b/drivers/hid/hid-shanwan.c
@@ -0,0 +1,256 @@ 
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Force feedback support for Shanwan USB WirelessGamepad
+ *
+ * Copyright (c) 2022-2023	Huseyin BIYIK	<huseyinbiyik@hotmail.com>
+ * Copyright (c) 2023	Ahmad Hasan Mubashshir	<ahmubashshir@gmail.com>
+ *
+ * mapping according to Gamepad Protocol
+ *
+ * Button 01: BTN_SOUTH (CROSS)
+ * Button 02: BTN_EAST(CIRCLE)
+ * Button 03: BTN_NORTH (TRIANGLE)
+ * Button 04: BTN_WEST (SQUARE)
+ * Button 05: BTL_TL (L1)
+ * Button 06: BTM_TR (R1)
+ * Button 07: BTN_TL2 (L2)
+ * Button 08: BTN_TR2 (R2)
+ * Button 09: BTN_SELECT
+ * Button 10: BTN_START
+ * Button 11: BTN_MODE
+ * Button 12: BTN_THUMBL (LS1)
+ * Button 13: BTN_THUMBR (LS1)
+ * LS1: X/Y AXIS
+ * LS2: Rx/Ry AXIS
+ * R2/L2 Touch Sensors: R/Rz
+ */
+
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/moduleparam.h>
+
+#include "hid-ids.h"
+
+#define PID0575_RDESC_ORIG_SIZE 137
+
+static bool swap_motors;
+module_param_named(swap, swap_motors, bool, 0);
+MODULE_PARM_DESC(swap, "Swap Weak/Strong Feedback motors");
+
+static __u8 pid0575_rdesc_fixed[] = {
+	0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
+	0x09, 0x05, // Usage (Game Pad)
+	0xA1, 0x01, // Collection (Application)
+	0x15, 0x00, // Logical Minimum (0)
+	0x25, 0x01, // Logical Maximum (1)
+	0x35, 0x00, // Physical Minimum (0)
+	0x45, 0x01, // Physical Maximum (1)
+	0x75, 0x01, // Report Size (1)
+	0x95, 0x0D, // Report Count (13)
+	0x05, 0x09, // Usage Page (Button)
+	0x09, 0x03, // Usage (BTN_NORTH)
+	0x09, 0x02, // Usage (BTN_EAST)
+	0x09, 0x01, // Usage (BTN_SOUTH)
+	0x09, 0x04, // Usage (BTN_WEST)
+	0x09, 0x05, // Usage (BTN_TL)
+	0x09, 0x06, // Usage (BTN_TR)
+	0x09, 0x07, // Usage (BTN_TL2)
+	0x09, 0x08, // Usage (BTN_TR2)
+	0x09, 0x09, // Usage (BTN_SELECT)
+	0x09, 0x10, // Usage (BTN_START)
+	0x09, 0x12, // Usage (BTN_THUMBL)
+	0x09, 0x13, // Usage (BTN_THUMBR)
+	0x09, 0x11, // Usage (BTN_MODE)
+	0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,PreferredState,NoNullPosition)
+	0x75, 0x01, // Report Size (1)
+	0x95, 0x03, // Report Count (3)
+	0x81, 0x01, // Input (Const,Array,Abs,No Wrap,Linear,PreferredState,NoNullPosition)
+	0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
+	0x25, 0x07, // Logical Maximum (7)
+	0x46, 0x3B, 0x01, // Physical Maximum (315)
+	0x75, 0x04, // Report Size (4)
+	0x95, 0x01, // Report Count (1)
+	0x65, 0x14, // Unit (System: English Rotation, Length: Centimeter)
+	0x09, 0x39, // Usage (Hat switch)
+	0x81, 0x42, // Input (Data,Var,Abs,No Wrap,Linear,PreferredState,NullState)
+	0x65, 0x00, // Unit (None)
+	0x95, 0x01, // Report Count (1)
+	0x81, 0x01, // Input(Const,Array,Abs,NoWrap,Linear,PreferredState,NoNullPosition)
+	0x26, 0xFF, 0x00, // Logical Maximum (255)
+	0x46, 0xFF, 0x00, // Physical Maximum (255)
+	0x09, 0x30, // Usage (X)
+	0x09, 0x31, // Usage (Y)
+	0x09, 0x33, // Usage (Rx)
+	0x09, 0x34, // Usage (Ry)
+	0x75, 0x08, // Report Size (8)
+	0x95, 0x04, // Report Count (4)
+	0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,PreferredState,NoNullPosition)
+	0x95, 0x0A, // Report Count (10)
+	0x81, 0x01, // Input (Const,Array,Abs,No Wrap,Linear,PreferredState,NoNullPosition)
+	0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
+	0x26, 0xFF, 0x00, // Logical Maximum (255)
+	0x46, 0xFF, 0x00, // Physical Maximum (255)
+	0x09, 0x32, // Usage (Z)
+	0x09, 0x35, // Usage (Rz)
+	0x95, 0x02, // Report Count (2)
+	0x81, 0x02, // Input(Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
+	0x95, 0x08, // Report Count (8)
+	0x81, 0x01, // Input(Const,Array,Abs,NoWrap,Linear,PreferredState,NoNullPosition)
+	0x06, 0x00, 0xFF, // Usage Page (Vendor Defined 0xFF00)
+	0xB1, 0x02, // Feature(Data,Var,Abs,No Wrap,Linear,PreferredState,NoNullPosition,!volatile)
+	0x0A, 0x21, 0x26, // Usage (0x2621)
+	0x95, 0x08, // Report Count (8)
+	0x91, 0x02, // Output(Data,Var,Abs,No Wrap,Linear,PreferredState,NoNullPosition,!volatile)
+	0x0A, 0x21, 0x26, // Usage (0x2621)
+	0x95, 0x08, // Report Count (8)
+	0x81, 0x02, // Input(Data,Var,Abs,No Wrap,Linear,Preferred State,NoNullPosition)
+	0xC0,       // End Collection
+};
+
+struct shanwan_device {
+	struct hid_report *report;
+};
+
+#ifdef CONFIG_SHANWAN_FF
+static int shanwan_play_effect(struct input_dev *dev, void *data, struct ff_effect *effect)
+{
+	struct hid_device *hid = input_get_drvdata(dev);
+	struct shanwan_device *shanwan = data;
+	struct hid_report *report = shanwan->report;
+
+	if (effect->type != FF_RUMBLE)
+		return 0;
+
+	report->field[0]->value[0] = 0x02; /* 2 = rumble effect message */
+	report->field[0]->value[1] = 0x08; /* reserved value, always 8 */
+	if (swap_motors) {
+		/* weak rumble / strong rumble */
+		report->field[0]->value[2] = effect->u.rumble.strong_magnitude / 256;
+		report->field[0]->value[3] = effect->u.rumble.weak_magnitude / 256;
+	} else {
+		/* strong rumble / weak rumble */
+		report->field[0]->value[2] = effect->u.rumble.weak_magnitude / 256;
+		report->field[0]->value[3] = effect->u.rumble.strong_magnitude / 256;
+	}
+	report->field[0]->value[4] = 0xff; /* duration 0-254 (255 = nonstop) */
+	report->field[0]->value[5] = 0x00; /* padding */
+	report->field[0]->value[6] = 0x00; /* padding */
+	report->field[0]->value[7] = 0x00; /* padding */
+	hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+
+	return 0;
+}
+
+static int shanwan_init_ff(struct hid_device *hid)
+{
+	struct shanwan_device *shanwan;
+	struct hid_report *report;
+	struct hid_input *hidinput;
+	struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+	struct input_dev *dev;
+
+	if (list_empty(&hid->inputs)) {
+		hid_err(hid, "no inputs found\n");
+		return -ENODEV;
+	}
+	hidinput = list_first_entry(&hid->inputs, struct hid_input, list);
+	dev = hidinput->input;
+
+	if (list_empty(report_list)) {
+		hid_err(hid, "no output reports found\n");
+		return -ENODEV;
+	}
+
+	report = list_first_entry(report_list, struct hid_report, list);
+
+	shanwan = kzalloc(sizeof(*shanwan), GFP_KERNEL);
+	if (!shanwan)
+		return -ENOMEM;
+
+	set_bit(FF_RUMBLE, dev->ffbit);
+
+	if (input_ff_create_memless(dev, shanwan, shanwan_play_effect)) {
+		kfree(shanwan);
+		return -ENODEV;
+	}
+
+	shanwan->report = report;
+
+	return 0;
+}
+#else
+static int shanwan_init_ff(struct hid_device *hid)
+{
+	return 0;
+}
+#endif
+
+static int shanwan_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+	int error;
+
+	error = hid_parse(hdev);
+	if (error) {
+		hid_err(hdev, "parse failed\n");
+		return error;
+	}
+
+	error = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
+	if (error) {
+		hid_err(hdev, "hw start failed\n");
+		return error;
+	}
+
+	error = shanwan_init_ff(hdev);
+	if (error)
+		hid_warn(hdev, "Failed to enable force feedback support, error: %d\n", error);
+
+	error = hid_hw_open(hdev);
+	if (error) {
+		dev_err(&hdev->dev, "hw open failed\n");
+		hid_hw_stop(hdev);
+		return error;
+	}
+
+	return 0;
+}
+
+static void shanwan_remove(struct hid_device *hdev)
+{
+	hid_hw_close(hdev);
+	hid_hw_stop(hdev);
+}
+
+static __u8 *shanwan_report_fixup(struct hid_device *hid, __u8 *rdesc, unsigned int *rsize)
+{
+	if (*rsize == PID0575_RDESC_ORIG_SIZE) {
+		rdesc = pid0575_rdesc_fixed;
+		*rsize = sizeof(pid0575_rdesc_fixed);
+	} else {
+		hid_warn(hid, "unexpected rdesc, please submit for review\n");
+	}
+	return rdesc;
+}
+
+static const struct hid_device_id shanwan_devices[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SHANWAN, USB_PRODUCT_ID_SHANWAN_USB_WIRELESSGAMEPAD) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, shanwan_devices);
+
+static struct hid_driver shanwan_driver = {
+	.name			= "shanwan",
+	.id_table		= shanwan_devices,
+	.probe			= shanwan_probe,
+	.report_fixup		= shanwan_report_fixup,
+	.remove			= shanwan_remove,
+};
+module_hid_driver(shanwan_driver);
+
+MODULE_AUTHOR("Huseyin BIYIK <huseyinbiyik@hotmail.com>");
+MODULE_AUTHOR("Ahmad Hasan Mubashshir <ahmubashshir@gmail.com>");
+MODULE_DESCRIPTION("Force feedback support for Shanwan USB WirelessGamepad");
+MODULE_LICENSE("GPL");