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Date: Wed, 09 Apr 2014 13:33:48 +0200
From: Michal Malý <madcatxster@...oid-pointer.net>
To: dmitry.torokhov@...il.com, jkosina@...e.cz
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
Elias Vanderstuyft <elias.vds@...il.com>
Subject: [PATCH 22/24] Port hid-lg2ff to ff-memless-next
- 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 <elias.vds@...il.com>
---
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 <linux/input.h>
+#include <linux/input/ff-memless-next.h>
#include <linux/slab.h>
#include <linux/hid.h>
#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;
--
1.9.1
--
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