Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756401AbaDVOBq (ORCPT ); Tue, 22 Apr 2014 10:01:46 -0400 Received: from devoid-pointer.net ([31.31.77.140]:49539 "EHLO smtp.devoid-pointer.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932478AbaDVOBe (ORCPT ); Tue, 22 Apr 2014 10:01:34 -0400 From: =?UTF-8?q?Michal=20Mal=C3=BD?= To: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Cc: dmitry.torokhov@gmail.com, jkosina@suse.cz, elias.vds@gmail.com, anssi.hannula@iki.fi, simon@mungewell.org Subject: [PATCH v2 22/24] input: Port hid-lg2ff to ff-memless-next Date: Tue, 22 Apr 2014 16:00:07 +0200 Message-Id: <1398175209-9565-23-git-send-email-madcatxster@devoid-pointer.net> X-Mailer: git-send-email 1.9.2 In-Reply-To: <1398175209-9565-1-git-send-email-madcatxster@devoid-pointer.net> References: <1398175209-9565-1-git-send-email-madcatxster@devoid-pointer.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Port hid-lg2ff to ff-memless-next * Clamp vibration magnitude to range <0x02; 0xfd> to prevent irregular shaking of the vibration motors. Signed-off-by: Elias Vanderstuyft --- drivers/hid/Kconfig | 2 +- drivers/hid/hid-lg2ff.c | 65 ++++++++++++++++++++++++++++++++++--------------- 2 files changed, 47 insertions(+), 20 deletions(-) diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig index 7d617a8..8889b7a 100644 --- a/drivers/hid/Kconfig +++ b/drivers/hid/Kconfig @@ -372,7 +372,7 @@ config LOGITECH_FF config LOGIRUMBLEPAD2_FF bool "Logitech force feedback support (variant 2)" depends on HID_LOGITECH - select INPUT_FF_MEMLESS + select INPUT_FF_MEMLESS_NEXT help Say Y here if you want to enable force feedback support for: - Logitech RumblePad diff --git a/drivers/hid/hid-lg2ff.c b/drivers/hid/hid-lg2ff.c index 0e3fb1a..6ab5327 100644 --- a/drivers/hid/hid-lg2ff.c +++ b/drivers/hid/hid-lg2ff.c @@ -22,42 +22,69 @@ #include +#include #include #include #include "hid-lg.h" +#define FF_UPDATE_RATE 8 + struct lg2ff_device { struct hid_report *report; }; -static int play_effect(struct input_dev *dev, void *data, - struct ff_effect *effect) +static int hid_lg2ff_start_rumble(struct hid_device *hid, struct hid_report *report, + const struct mlnx_rumble_force *rumble) { - struct hid_device *hid = input_get_drvdata(dev); - struct lg2ff_device *lg2ff = data; int weak, strong; - strong = effect->u.rumble.strong_magnitude; - weak = effect->u.rumble.weak_magnitude; +#define CLAMP_QUIRK(x) do { if (x < 2) x = 2; else if (x > 0xfd) x = 0xfd; } \ + while (0) - if (weak || strong) { - weak = weak * 0xff / 0xffff; - strong = strong * 0xff / 0xffff; + /* Scale down from MLNX range */ + strong = rumble->strong * 0xff / 0xffff; + weak = rumble->weak * 0xff / 0xffff; + CLAMP_QUIRK(weak); + CLAMP_QUIRK(strong); - lg2ff->report->field[0]->value[0] = 0x51; - lg2ff->report->field[0]->value[2] = weak; - lg2ff->report->field[0]->value[4] = strong; - } else { - lg2ff->report->field[0]->value[0] = 0xf3; - lg2ff->report->field[0]->value[2] = 0x00; - lg2ff->report->field[0]->value[4] = 0x00; - } + report->field[0]->value[0] = 0x51; + report->field[0]->value[2] = weak; + report->field[0]->value[4] = strong; - hid_hw_request(hid, lg2ff->report, HID_REQ_SET_REPORT); + hid_hw_request(hid, report, HID_REQ_SET_REPORT); return 0; } +static int hid_lg2ff_stop_rumble(struct hid_device *hid, struct hid_report *report) +{ + report->field[0]->value[0] = 0xf3; + report->field[0]->value[2] = 0x00; + report->field[0]->value[4] = 0x00; + + hid_hw_request(hid, report, HID_REQ_SET_REPORT); + return 0; +} + +static int hid_lg2ff_control(struct input_dev *dev, void *data, + const struct mlnx_effect_command *command) +{ + struct hid_device *hid = input_get_drvdata(dev); + struct lg2ff_device *lg2ff = data; + + switch (command->cmd) { + case MLNX_START_RUMBLE: + return hid_lg2ff_start_rumble(hid, lg2ff->report, &command->u.rumble_force); + break; + case MLNX_STOP_RUMBLE: + return hid_lg2ff_stop_rumble(hid, lg2ff->report); + break; + default: + dbg_hid("Unsupported effect command"); + return -EINVAL; + } +} + int lg2ff_init(struct hid_device *hid) { struct lg2ff_device *lg2ff; @@ -78,7 +105,7 @@ int lg2ff_init(struct hid_device *hid) set_bit(FF_RUMBLE, dev->ffbit); - error = input_ff_create_memless(dev, lg2ff, play_effect); + error = input_ff_create_mlnx(dev, lg2ff, hid_lg2ff_control, FF_UPDATE_RATE); if (error) { kfree(lg2ff); return error; -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/