linux-kernel - [PATCHv3] HID: sony: Enable Gasia third-party PS3 controllers

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Message-Id: <20150210145252.d5b86e42.cand@gmx.com>
Date:	Tue, 10 Feb 2015 14:52:52 +0200
From:	Lauri Kasanen <cand@....com>
To:	jkosina@...e.cz, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, benjamin.tissoires@...il.com
Cc:	ao2@....it, AndrewD207@....com
Subject: [PATCHv3] HID: sony: Enable Gasia third-party PS3 controllers

Without this, my "Gasia Co.,Ltd PS(R) Gamepad" would not send
any events. Now everything works including the leds.

Based on work by Andrew Haines and Antonio Ospite.

cc: Antonio Ospite <ao2@....it>
cc: Andrew Haines <AndrewD207@....com>
Signed-off-by: Lauri Kasanen <cand@....com>
---
 drivers/hid/hid-sony.c | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

v3:
- reuse the dummy heap buffer
- skip later checks if the earlier ones fail

v2:
- edited error messages
- use output_report

diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 31e9d25..b0010d9 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -1131,7 +1131,7 @@ static void sony_input_configured(struct hid_device *hdev,
 static int sixaxis_set_operational_usb(struct hid_device *hdev)
 {
 	int ret;
-	char *buf = kmalloc(18, GFP_KERNEL);
+	char *buf = kmalloc(65, GFP_KERNEL);
 
 	if (!buf)
 		return -ENOMEM;
@@ -1139,9 +1139,29 @@ static int sixaxis_set_operational_usb(struct hid_device *hdev)
 	ret = hid_hw_raw_request(hdev, 0xf2, buf, 17, HID_FEATURE_REPORT,
 				 HID_REQ_GET_REPORT);
 
+	if (ret < 0) {
+		hid_err(hdev, "can't set operational mode: step 1\n");
+		goto out;
+	}
+
+	/*
+	 * Some compatible controllers like the Speedlink Strike FX and
+	 * Gasia need another query plus an USB interrupt to get operational.
+	 */
+	ret = hid_hw_raw_request(hdev, 0xf5, buf, 64, HID_FEATURE_REPORT,
+				 HID_REQ_GET_REPORT);
+
+	if (ret < 0) {
+		hid_err(hdev, "can't set operational mode: step 2\n");
+		goto out;
+	}
+
+	ret = hid_hw_output_report(hdev, buf, 1);
+
 	if (ret < 0)
-		hid_err(hdev, "can't set operational mode\n");
+		hid_err(hdev, "can't set operational mode: step 3\n");
 
+out:
 	kfree(buf);
 
 	return ret;
-- 
1.8.3.1

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