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Subject[PATCH 4.9 54/92] Input: xpad - support some quirky Xbox One pads
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 81093c9848a781b85163d06de92ef8f84528cf6a ]

There are several quirky Xbox One pads that depend on initialization
packets that the Microsoft pads don't require. To deal with these,
I've added a mechanism for issuing device-specific initialization
packets using a VID/PID-based quirks list.

For the initial set of init quirks, I have added quirk handling from
Valve's Steam Link xpad driver[0] and the 360Controller project[1] for
macOS to enable some new pads to work properly.

This should enable full functionality on the following quirky pads:
0x0e6f:0x0165 - Titanfall 2 gamepad (previously fully non-functional)
0x0f0d:0x0067 - Hori Horipad (analog sticks previously non-functional)
0x24c6:0x541a - PowerA Xbox One pad (previously fully non-functional)
0x24c6:0x542a - PowerA Xbox One pad (previously fully non-functional)
0x24c6:0x543a - PowerA Xbox One pad (previously fully non-functional)

[0]: https://github.com/ValveSoftware/steamlink-sdk/blob/master/kernel/drivers/input/joystick/xpad.c
[1]: https://github.com/360Controller/360Controller

Signed-off-by: Cameron Gutman <aicommander@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/input/joystick/xpad.c | 114 ++++++++++++++++++++++++++++++----
1 file changed, 101 insertions(+), 13 deletions(-)

diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index 153b1ee13e03..df83fdc6c0e7 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -339,6 +339,64 @@ static struct usb_device_id xpad_table[] = {

MODULE_DEVICE_TABLE(usb, xpad_table);

+struct xboxone_init_packet {
+ u16 idVendor;
+ u16 idProduct;
+ const u8 *data;
+ u8 len;
+};
+
+#define XBOXONE_INIT_PKT(_vid, _pid, _data) \
+ { \
+ .idVendor = (_vid), \
+ .idProduct = (_pid), \
+ .data = (_data), \
+ .len = ARRAY_SIZE(_data), \
+ }
+
+
+/*
+ * This packet is required for all Xbox One pads with 2015
+ * or later firmware installed (or present from the factory).
+ */
+static const u8 xboxone_fw2015_init[] = {
+ 0x05, 0x20, 0x00, 0x01, 0x00
+};
+
+/*
+ * This packet is required for the Titanfall 2 Xbox One pads
+ * (0x0e6f:0x0165) to finish initialization and for Hori pads
+ * (0x0f0d:0x0067) to make the analog sticks work.
+ */
+static const u8 xboxone_hori_init[] = {
+ 0x01, 0x20, 0x00, 0x09, 0x00, 0x04, 0x20, 0x3a,
+ 0x00, 0x00, 0x00, 0x80, 0x00
+};
+
+/*
+ * A rumble packet is required for some PowerA pads to start
+ * sending input reports. One of those pads is (0x24c6:0x543a).
+ */
+static const u8 xboxone_zerorumble_init[] = {
+ 0x09, 0x00, 0x00, 0x09, 0x00, 0x0F, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+/*
+ * This specifies the selection of init packets that a gamepad
+ * will be sent on init *and* the order in which they will be
+ * sent. The correct sequence number will be added when the
+ * packet is going to be sent.
+ */
+static const struct xboxone_init_packet xboxone_init_packets[] = {
+ XBOXONE_INIT_PKT(0x0e6f, 0x0165, xboxone_hori_init),
+ XBOXONE_INIT_PKT(0x0f0d, 0x0067, xboxone_hori_init),
+ XBOXONE_INIT_PKT(0x0000, 0x0000, xboxone_fw2015_init),
+ XBOXONE_INIT_PKT(0x24c6, 0x541a, xboxone_zerorumble_init),
+ XBOXONE_INIT_PKT(0x24c6, 0x542a, xboxone_zerorumble_init),
+ XBOXONE_INIT_PKT(0x24c6, 0x543a, xboxone_zerorumble_init),
+};
+
struct xpad_output_packet {
u8 data[XPAD_PKT_LEN];
u8 len;
@@ -375,6 +433,7 @@ struct usb_xpad {

struct xpad_output_packet out_packets[XPAD_NUM_OUT_PACKETS];
int last_out_packet;
+ int init_seq;

#if defined(CONFIG_JOYSTICK_XPAD_LEDS)
struct xpad_led *led;
@@ -749,12 +808,48 @@ exit:
__func__, retval);
}

+/* Callers must hold xpad->odata_lock spinlock */
+static bool xpad_prepare_next_init_packet(struct usb_xpad *xpad)
+{
+ const struct xboxone_init_packet *init_packet;
+
+ if (xpad->xtype != XTYPE_XBOXONE)
+ return false;
+
+ /* Perform initialization sequence for Xbox One pads that require it */
+ while (xpad->init_seq < ARRAY_SIZE(xboxone_init_packets)) {
+ init_packet = &xboxone_init_packets[xpad->init_seq++];
+
+ if (init_packet->idVendor != 0 &&
+ init_packet->idVendor != xpad->dev->id.vendor)
+ continue;
+
+ if (init_packet->idProduct != 0 &&
+ init_packet->idProduct != xpad->dev->id.product)
+ continue;
+
+ /* This packet applies to our device, so prepare to send it */
+ memcpy(xpad->odata, init_packet->data, init_packet->len);
+ xpad->irq_out->transfer_buffer_length = init_packet->len;
+
+ /* Update packet with current sequence number */
+ xpad->odata[2] = xpad->odata_serial++;
+ return true;
+ }
+
+ return false;
+}
+
/* Callers must hold xpad->odata_lock spinlock */
static bool xpad_prepare_next_out_packet(struct usb_xpad *xpad)
{
struct xpad_output_packet *pkt, *packet = NULL;
int i;

+ /* We may have init packets to send before we can send user commands */
+ if (xpad_prepare_next_init_packet(xpad))
+ return true;
+
for (i = 0; i < XPAD_NUM_OUT_PACKETS; i++) {
if (++xpad->last_out_packet >= XPAD_NUM_OUT_PACKETS)
xpad->last_out_packet = 0;
@@ -940,24 +1035,17 @@ static int xpad_inquiry_pad_presence(struct usb_xpad *xpad)

static int xpad_start_xbox_one(struct usb_xpad *xpad)
{
- struct xpad_output_packet *packet =
- &xpad->out_packets[XPAD_OUT_CMD_IDX];
unsigned long flags;
int retval;

spin_lock_irqsave(&xpad->odata_lock, flags);

- /* Xbox one controller needs to be initialized. */
- packet->data[0] = 0x05;
- packet->data[1] = 0x20;
- packet->data[2] = xpad->odata_serial++; /* packet serial */
- packet->data[3] = 0x01; /* rumble bit enable? */
- packet->data[4] = 0x00;
- packet->len = 5;
- packet->pending = true;
-
- /* Reset the sequence so we send out start packet first */
- xpad->last_out_packet = -1;
+ /*
+ * Begin the init sequence by attempting to send a packet.
+ * We will cycle through the init packet sequence before
+ * sending any packets from the output ring.
+ */
+ xpad->init_seq = 0;
retval = xpad_try_sending_next_out_packet(xpad);

spin_unlock_irqrestore(&xpad->odata_lock, flags);
--
2.17.1


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