[PATCH 12/24] Port hid-lgff to ff-memless-next

[Michal MalÃ]

Signed-off-by: Michal Malà <madcatxster@xxxxxxxxxxxxxxxxxx>
---
 drivers/hid/Kconfig    |  2 +-
 drivers/hid/hid-lgff.c | 70 +++++++++++++++++++++++++++++++++++---------------
 2 files changed, 51 insertions(+), 21 deletions(-)

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index d1d4e77..c7794ae 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -356,7 +356,7 @@ config HID_LOGITECH_DJ
 config LOGITECH_FF
 	bool "Logitech force feedback support"
 	depends on HID_LOGITECH
-	select INPUT_FF_MEMLESS
+	select INPUT_FF_MEMLESS_NEXT
 	help
 	  Say Y here if you have one of these devices:
 	  - Logitech WingMan Cordless RumblePad
diff --git a/drivers/hid/hid-lgff.c b/drivers/hid/hid-lgff.c
index e1394af..96d418c 100644
--- a/drivers/hid/hid-lgff.c
+++ b/drivers/hid/hid-lgff.c
@@ -31,9 +31,12 @@
 
 #include <linux/input.h>
 #include <linux/hid.h>
+#include <linux/input/ff-memless-next.h>
 
 #include "hid-lg.h"
 
+#define FF_UPDATE_RATE 50
+
 struct dev_type {
 	u16 idVendor;
 	u16 idProduct;
@@ -47,11 +50,25 @@ static const signed short ff_rumble[] = {
 
 static const signed short ff_joystick[] = {
 	FF_CONSTANT,
+	FF_RAMP,
+	FF_PERIODIC,
+	FF_SQUARE,
+	FF_TRIANGLE,
+	FF_SINE,
+	FF_SAW_UP,
+	FF_SAW_DOWN,
 	-1
 };
 
 static const signed short ff_joystick_ac[] = {
 	FF_CONSTANT,
+	FF_RAMP,
+	FF_PERIODIC,
+	FF_SQUARE,
+	FF_TRIANGLE,
+	FF_SINE,
+	FF_SAW_UP,
+	FF_SAW_DOWN,
 	FF_AUTOCENTER,
 	-1
 };
@@ -66,45 +83,58 @@ static const struct dev_type devices[] = {
 	{ 0x046d, 0xc295, ff_joystick },
 };
 
-static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
+static int hid_lgff_play(struct input_dev *dev, void *data,
+			 const struct mlnx_effect_command *command)
 {
 	struct hid_device *hid = input_get_drvdata(dev);
 	struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
 	struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
-	int x, y;
-	unsigned int left, right;
 
-#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
+	switch (command->cmd) {
+	case MLNX_START_COMBINED: {
+		const struct mlnx_simple_force *simple_force = &command->u.simple_force;
+		/* Scale down from MLNX range */
+		const int x = 0x80 - (simple_force->x * 0xff / 0xffff);
+		const int y = 0x80 - simple_force->y * 0xff / 0xffff;
 
-	switch (effect->type) {
-	case FF_CONSTANT:
-		x = effect->u.ramp.start_level + 0x7f;	/* 0x7f is center */
-		y = effect->u.ramp.end_level + 0x7f;
-		CLAMP(x);
-		CLAMP(y);
 		report->field[0]->value[0] = 0x51;
 		report->field[0]->value[1] = 0x08;
 		report->field[0]->value[2] = x;
 		report->field[0]->value[3] = y;
 		dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
-		hid_hw_request(hid, report, HID_REQ_SET_REPORT);
 		break;
+	}
+	case MLNX_STOP_COMBINED:
+		report->field[0]->value[0] = 0x51;
+		report->field[0]->value[1] = 0x08;
+		report->field[0]->value[2] = 0x80;
+		report->field[0]->value[3] = 0x80;
+		break;
+	case MLNX_START_RUMBLE: {
+		const struct mlnx_rumble_force *rumble_force = &command->u.rumble_force;
+		/* Scale down from MLNX range */
+		const unsigned int right = rumble_force->weak * 0xff / 0xffff;
+		const unsigned int left = rumble_force->strong * 0xff / 0xffff;
 
-	case FF_RUMBLE:
-		right = effect->u.rumble.strong_magnitude;
-		left = effect->u.rumble.weak_magnitude;
-		right = right * 0xff / 0xffff;
-		left = left * 0xff / 0xffff;
-		CLAMP(left);
-		CLAMP(right);
 		report->field[0]->value[0] = 0x42;
 		report->field[0]->value[1] = 0x00;
 		report->field[0]->value[2] = left;
 		report->field[0]->value[3] = right;
 		dbg_hid("(left, right)=(%04x, %04x)\n", left, right);
-		hid_hw_request(hid, report, HID_REQ_SET_REPORT);
 		break;
 	}
+	case MLNX_STOP_RUMBLE:
+		report->field[0]->value[0] = 0x42;
+		report->field[0]->value[1] = 0x00;
+		report->field[0]->value[2] = 0;
+		report->field[0]->value[3] = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+
 	return 0;
 }
 
@@ -148,7 +178,7 @@ int lgff_init(struct hid_device* hid)
 	for (i = 0; ff_bits[i] >= 0; i++)
 		set_bit(ff_bits[i], dev->ffbit);
 
-	error = input_ff_create_memless(dev, NULL, hid_lgff_play);
+	error = input_ff_create_mlnx(dev, NULL, hid_lgff_play, FF_UPDATE_RATE);
 	if (error)
 		return error;
 
-- 
1.9.2

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