Commit 9131f8cc authored by Roderick Colenbrander's avatar Roderick Colenbrander Committed by Jiri Kosina
Browse files

HID: sony: Comply to Linux gamepad spec for DS4 



The DS4 side of hid-sony used the hid-core layer to assign buttons
and axes based on the HID report descriptors. The default mapping
was strange e.g. right stick using ABS_Z/ABS_RZ or the physical
'south button' being reported as BTN_EAST etcetera.

This patch makes the DS4 side ofi the hid-sony driver comply to
the Linux game controller spec as suggested in a discussion with
Dmitry on the linux-input list.

Currently the main user of the DS4 is the SDL2 library, which has
a mapping table using vendor/device/version as a key. In order to
not break SDL2 we discussed adjusting the version number, so it
can have both mappings. This was discust on linux-input and we
discussed privately with SDL2 developers.

Signed-off-by: default avatarRoderick Colenbrander <roderick.colenbrander@sony.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent ac797b95

drivers/hid/hid-sony.c

+70 −0
Original line number Diff line number Diff line
@@ -977,6 +977,32 @@ static const unsigned int buzz_keymap[] = { 
	[20] = BTN_TRIGGER_HAPPY20,

};



static const unsigned int ds4_absmap[] = {

	[0x30] = ABS_X,

	[0x31] = ABS_Y,

	[0x32] = ABS_RX, /* right stick X */

	[0x33] = ABS_Z, /* L2 */

	[0x34] = ABS_RZ, /* R2 */

	[0x35] = ABS_RY, /* right stick Y */

};



static const unsigned int ds4_keymap[] = {

	[0x1] = BTN_WEST, /* Square */

	[0x2] = BTN_SOUTH, /* Cross */

	[0x3] = BTN_EAST, /* Circle */

	[0x4] = BTN_NORTH, /* Triangle */

	[0x5] = BTN_TL, /* L1 */

	[0x6] = BTN_TR, /* R1 */

	[0x7] = BTN_TL2, /* L2 */

	[0x8] = BTN_TR2, /* R2 */

	[0x9] = BTN_SELECT, /* Share */

	[0xa] = BTN_START, /* Options */

	[0xb] = BTN_THUMBL, /* L3 */

	[0xc] = BTN_THUMBR, /* R3 */

	[0xd] = BTN_MODE, /* PS */

};





static enum power_supply_property sony_battery_props[] = {

	POWER_SUPPLY_PROP_PRESENT,

	POWER_SUPPLY_PROP_CAPACITY,
@@ -1143,6 +1169,37 @@ static int ps3remote_mapping(struct hid_device *hdev, struct hid_input *hi, 
	return 1;

}



static int ds4_mapping(struct hid_device *hdev, struct hid_input *hi,

		       struct hid_field *field, struct hid_usage *usage,

		       unsigned long **bit, int *max)

{

	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {

		unsigned int key = usage->hid & HID_USAGE;



		if (key >= ARRAY_SIZE(ds4_keymap))

			return -1;



		key = ds4_keymap[key];

		hid_map_usage_clear(hi, usage, bit, max, EV_KEY, key);

		return 1;

	} else if ((usage->hid & HID_USAGE_PAGE) == HID_UP_GENDESK) {

		unsigned int abs = usage->hid & HID_USAGE;



		/* Let the HID parser deal with the HAT. */

		if (usage->hid == HID_GD_HATSWITCH)

			return 0;



		if (abs >= ARRAY_SIZE(ds4_absmap))

			return -1;



		abs = ds4_absmap[abs];

		hid_map_usage_clear(hi, usage, bit, max, EV_ABS, abs);

		return 1;

	}



	return 0;

}



static u8 *sony_report_fixup(struct hid_device *hdev, u8 *rdesc,

		unsigned int *rsize)

{
@@ -1416,6 +1473,10 @@ static int sony_mapping(struct hid_device *hdev, struct hid_input *hi, 
	if (sc->quirks & PS3REMOTE)

		return ps3remote_mapping(hdev, hi, field, usage, bit, max);





	if (sc->quirks & DUALSHOCK4_CONTROLLER)

		return ds4_mapping(hdev, hi, field, usage, bit, max);



	/* Let hid-core decide for the others */

	return 0;

}
@@ -2578,6 +2639,15 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id) 
	else if (sc->quirks & SIXAXIS_CONTROLLER)

		connect_mask |= HID_CONNECT_HIDDEV_FORCE;



	/* Patch the hw version on DS4 compatible devices, so applications can

	 * distinguish between the default HID mappings and the mappings defined

	 * by the Linux game controller spec. This is important for the SDL2

	 * library, which has a game controller database, which uses device ids

	 * in combination with version as a key.

	 */

	if (sc->quirks & DUALSHOCK4_CONTROLLER)

		hdev->version |= 0x8000;



	ret = hid_hw_start(hdev, connect_mask);

	if (ret) {

		hid_err(hdev, "hw start failed\n");

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