Input: iforce - switch to the new FF interface

Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/joystick/iforce/iforce-main.c

@@ -83,103 +83,57 @@ static struct iforce_device iforce_device[] = {
 	{ 0x0000, 0x0000, "Unknown I-Force Device [%04x:%04x]",		btn_joystick, abs_joystick, ff_iforce }
 };
 
-
-
-static int iforce_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
+static int iforce_playback(struct input_dev *dev, int effect_id, int value)
 {
 	struct iforce* iforce = dev->private;
-	unsigned char data[3];
+	struct iforce_core_effect *core_effect = &iforce->core_effects[effect_id];
 
-	if (type != EV_FF)
-		return -1;
+	if (value > 0)
+		set_bit(FF_CORE_SHOULD_PLAY, core_effect->flags);
+	else
+		clear_bit(FF_CORE_SHOULD_PLAY, core_effect->flags);
 
-	switch (code) {
+	iforce_control_playback(iforce, effect_id, value);
+	return 0;
+}
 
-		case FF_GAIN:
+static void iforce_set_gain(struct input_dev *dev, u16 gain)
+{
+	struct iforce* iforce = dev->private;
+	unsigned char data[3];
 
-			data[0] = value >> 9;
+	data[0] = gain >> 9;
 	iforce_send_packet(iforce, FF_CMD_GAIN, data);
+}
 
-			return 0;
-
-		case FF_AUTOCENTER:
+static void iforce_set_autocenter(struct input_dev *dev, u16 magnitude)
+{
+	struct iforce* iforce = dev->private;
+	unsigned char data[3];
 
 	data[0] = 0x03;
-			data[1] = value >> 9;
+	data[1] = magnitude >> 9;
 	iforce_send_packet(iforce, FF_CMD_AUTOCENTER, data);
 
 	data[0] = 0x04;
 	data[1] = 0x01;
 	iforce_send_packet(iforce, FF_CMD_AUTOCENTER, data);
-
-			return 0;
-
-		default: /* Play or stop an effect */
-
-			if (!CHECK_OWNERSHIP(code, iforce)) {
-				return -1;
-			}
-			if (value > 0) {
-				set_bit(FF_CORE_SHOULD_PLAY, iforce->core_effects[code].flags);
-			}
-			else {
-				clear_bit(FF_CORE_SHOULD_PLAY, iforce->core_effects[code].flags);
-			}
-
-			iforce_control_playback(iforce, code, value);
-			return 0;
-	}
-
-	return -1;
 }
 
 /*
  * Function called when an ioctl is performed on the event dev entry.
  * It uploads an effect to the device
  */
-static int iforce_upload_effect(struct input_dev *dev, struct ff_effect *effect)
+static int iforce_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old)
 {
 	struct iforce* iforce = dev->private;
-	int id;
+	struct iforce_core_effect *core_effect = &iforce->core_effects[effect->id];
 	int ret;
-	int is_update;
-
-/* Check this effect type is supported by this device */
-	if (!test_bit(effect->type, iforce->dev->ffbit))
-		return -EINVAL;
-
-/*
- * If we want to create a new effect, get a free id
- */
-	if (effect->id == -1) {
-
-		for (id = 0; id < FF_EFFECTS_MAX; ++id)
-			if (!test_and_set_bit(FF_CORE_IS_USED, iforce->core_effects[id].flags))
-				break;
-
-		if (id == FF_EFFECTS_MAX || id >= iforce->dev->ff_effects_max)
-			return -ENOMEM;
-
-		effect->id = id;
-		iforce->core_effects[id].owner = current->pid;
-		iforce->core_effects[id].flags[0] = (1 << FF_CORE_IS_USED);	/* Only IS_USED bit must be set */
-
-		is_update = FALSE;
-	}
-	else {
-		/* We want to update an effect */
-		if (!CHECK_OWNERSHIP(effect->id, iforce))
-			return -EACCES;
-
-		/* Parameter type cannot be updated */
-		if (effect->type != iforce->core_effects[effect->id].effect.type)
-			return -EINVAL;
 
+	if (__test_and_set_bit(FF_CORE_IS_USED, core_effect->flags)) {
 		/* Check the effect is not already being updated */
-		if (test_bit(FF_CORE_UPDATE, iforce->core_effects[effect->id].flags))
+		if (test_bit(FF_CORE_UPDATE, core_effect->flags))
 			return -EAGAIN;
-
-		is_update = TRUE;
 	}
 
 /*
@@ -188,28 +142,28 @@ static int iforce_upload_effect(struct input_dev *dev, struct ff_effect *effect)
 	switch (effect->type) {
 
 		case FF_PERIODIC:
-			ret = iforce_upload_periodic(iforce, effect, is_update);
+			ret = iforce_upload_periodic(iforce, effect, old);
 			break;
 
 		case FF_CONSTANT:
-			ret = iforce_upload_constant(iforce, effect, is_update);
+			ret = iforce_upload_constant(iforce, effect, old);
 			break;
 
 		case FF_SPRING:
 		case FF_DAMPER:
-			ret = iforce_upload_condition(iforce, effect, is_update);
+			ret = iforce_upload_condition(iforce, effect, old);
 			break;
 
 		default:
 			return -EINVAL;
 	}
+
 	if (ret == 0) {
 		/* A packet was sent, forbid new updates until we are notified
 		 * that the packet was updated
 		 */
-		set_bit(FF_CORE_UPDATE, iforce->core_effects[effect->id].flags);
+		set_bit(FF_CORE_UPDATE, core_effect->flags);
 	}
-	iforce->core_effects[effect->id].effect = *effect;
 	return ret;
 }
 
@@ -219,20 +173,9 @@ static int iforce_upload_effect(struct input_dev *dev, struct ff_effect *effect)
  */
 static int iforce_erase_effect(struct input_dev *dev, int effect_id)
 {
-	struct iforce* iforce = dev->private;
+	struct iforce *iforce = dev->private;
+	struct iforce_core_effect *core_effect = &iforce->core_effects[effect_id];
 	int err = 0;
-	struct iforce_core_effect* core_effect;
-
-	if (effect_id < 0 || effect_id >= FF_EFFECTS_MAX)
-		return -EINVAL;
-
-	core_effect = &iforce->core_effects[effect_id];
-
-	/* Check who is trying to erase this effect */
-	if (core_effect->owner != current->pid) {
-		printk(KERN_WARNING "iforce-main.c: %d tried to erase an effect belonging to %d\n", current->pid, core_effect->owner);
-		return -EACCES;
-	}
 
 	if (test_bit(FF_MOD1_IS_USED, core_effect->flags))
 		err = release_resource(&core_effect->mod1_chunk);
@@ -240,7 +183,7 @@ static int iforce_erase_effect(struct input_dev *dev, int effect_id)
 	if (!err && test_bit(FF_MOD2_IS_USED, core_effect->flags))
 		err = release_resource(&core_effect->mod2_chunk);
 
-	/*TODO: remember to change that if more FF_MOD* bits are added */
+	/* TODO: remember to change that if more FF_MOD* bits are added */
 	core_effect->flags[0] = 0;
 
 	return err;
@@ -260,33 +203,11 @@ static int iforce_open(struct input_dev *dev)
 #endif
 	}
 
+	if (test_bit(EV_FF, dev->evbit)) {
 		/* Enable force feedback */
 		iforce_send_packet(iforce, FF_CMD_ENABLE, "\004");
-
-	return 0;
-}
-
-static int iforce_flush(struct input_dev *dev, struct file *file)
-{
-	struct iforce *iforce = dev->private;
-	int i;
-
-	/* Erase all effects this process owns */
-	for (i=0; i<dev->ff_effects_max; ++i) {
-
-		if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) &&
-			current->pid == iforce->core_effects[i].owner) {
-
-			/* Stop effect */
-			input_report_ff(dev, i, 0);
-
-			/* Free ressources assigned to effect */
-			if (iforce_erase_effect(dev, i)) {
-				printk(KERN_WARNING "iforce_flush: erase effect %d failed\n", i);
-			}
 	}
 
-	}
 	return 0;
 }
 
@@ -295,17 +216,18 @@ static void iforce_release(struct input_dev *dev)
 	struct iforce *iforce = dev->private;
 	int i;
 
-	/* Check: no effect should be present in memory */
-	for (i=0; i<dev->ff_effects_max; ++i) {
-		if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags))
+	if (test_bit(EV_FF, dev->evbit)) {
+		/* Check: no effects should be present in memory */
+		for (i = 0; i < dev->ff->max_effects; i++) {
+			if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags)) {
+				printk(KERN_WARNING "iforce_release: Device still owns effects\n");
 				break;
 			}
-	if (i<dev->ff_effects_max) {
-		printk(KERN_WARNING "iforce_release: Device still owns effects\n");
 		}
 
 		/* Disable force feedback playback */
 		iforce_send_packet(iforce, FF_CMD_ENABLE, "\001");
+	}
 
 	switch (iforce->bus) {
 #ifdef CONFIG_JOYSTICK_IFORCE_USB
@@ -342,8 +264,10 @@ void iforce_delete_device(struct iforce *iforce)
 int iforce_init_device(struct iforce *iforce)
 {
 	struct input_dev *input_dev;
+	struct ff_device *ff;
 	unsigned char c[] = "CEOV";
-	int i;
+	int i, error;
+	int ff_effects = 0;
 
 	input_dev = input_allocate_device();
 	if (!input_dev)
@@ -378,11 +302,6 @@ int iforce_init_device(struct iforce *iforce)
 	input_dev->name = "Unknown I-Force device";
 	input_dev->open = iforce_open;
 	input_dev->close = iforce_release;
-	input_dev->flush = iforce_flush;
-	input_dev->event = iforce_input_event;
-	input_dev->upload_effect = iforce_upload_effect;
-	input_dev->erase_effect = iforce_erase_effect;
-	input_dev->ff_effects_max = 10;
 
 /*
  * On-device memory allocation.
@@ -430,15 +349,15 @@ int iforce_init_device(struct iforce *iforce)
 		printk(KERN_WARNING "iforce-main.c: Device does not respond to id packet B\n");
 
 	if (!iforce_get_id_packet(iforce, "N"))
-		iforce->dev->ff_effects_max = iforce->edata[1];
+		ff_effects = iforce->edata[1];
 	else
 		printk(KERN_WARNING "iforce-main.c: Device does not respond to id packet N\n");
 
 	/* Check if the device can store more effects than the driver can really handle */
-	if (iforce->dev->ff_effects_max > FF_EFFECTS_MAX) {
-		printk(KERN_WARNING "input??: Device can handle %d effects, but N_EFFECTS_MAX is set to %d in iforce.h\n",
-			iforce->dev->ff_effects_max, FF_EFFECTS_MAX);
-		iforce->dev->ff_effects_max = FF_EFFECTS_MAX;
+	if (ff_effects > IFORCE_EFFECTS_MAX) {
+		printk(KERN_WARNING "iforce: Limiting number of effects to %d (device reports %d)\n",
+		       IFORCE_EFFECTS_MAX, ff_effects);
+		ff_effects = IFORCE_EFFECTS_MAX;
 	}
 
 /*
@@ -472,12 +391,10 @@ int iforce_init_device(struct iforce *iforce)
  * Set input device bitfields and ranges.
  */
 
-	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_FF) | BIT(EV_FF_STATUS);
+	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_FF_STATUS);
 
-	for (i = 0; iforce->type->btn[i] >= 0; i++) {
-		signed short t = iforce->type->btn[i];
-		set_bit(t, input_dev->keybit);
-	}
+	for (i = 0; iforce->type->btn[i] >= 0; i++)
+		set_bit(iforce->type->btn[i], input_dev->keybit);
 	set_bit(BTN_DEAD, input_dev->keybit);
 
 	for (i = 0; iforce->type->abs[i] >= 0; i++) {
@@ -516,9 +433,24 @@ int iforce_init_device(struct iforce *iforce)
 		}
 	}
 
+	if (ff_effects) {
+
 		for (i = 0; iforce->type->ff[i] >= 0; i++)
 			set_bit(iforce->type->ff[i], input_dev->ffbit);
 
+		error = input_ff_create(input_dev, ff_effects);
+		if (error) {
+			input_free_device(input_dev);
+			return error;
+		}
+
+		ff = input_dev->ff;
+		ff->upload = iforce_upload_effect;
+		ff->erase = iforce_erase_effect;
+		ff->set_gain = iforce_set_gain;
+		ff->set_autocenter = iforce_set_autocenter;
+		ff->playback = iforce_playback;
+	}
 /*
  * Register input device.
  */

drivers/input/joystick/iforce/iforce-packets.c

@@ -140,7 +140,10 @@ static int mark_core_as_ready(struct iforce *iforce, unsigned short addr)
 {
 	int i;
 
-	for (i = 0; i < iforce->dev->ff_effects_max; ++i) {
+	if (!iforce->dev->ff)
+		return 0;
+
+	for (i = 0; i < iforce->dev->ff->max_effects; ++i) {
 		if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) &&
 		    (iforce->core_effects[i].mod1_chunk.start == addr ||
 		     iforce->core_effects[i].mod2_chunk.start == addr)) {
@@ -232,17 +235,15 @@ void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data,
 					/* Report play event */
 					input_report_ff_status(dev, i, FF_STATUS_PLAYING);
 				}
-			}
-			else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
+			} else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
 				/* Report stop event */
 				input_report_ff_status(dev, i, FF_STATUS_STOPPED);
 			}
 			if (LO(cmd) > 3) {
 				int j;
-				for (j=3; j<LO(cmd); j+=2) {
+				for (j = 3; j < LO(cmd); j += 2)
 					mark_core_as_ready(iforce, data[j] | (data[j+1]<<8));
 			}
-			}
 			break;
 	}
 	being_used--;

drivers/input/joystick/iforce/iforce.h

@@ -51,10 +51,7 @@
 #define IFORCE_232	1
 #define IFORCE_USB	2
 
-#define FALSE 0
-#define TRUE 1
-
-#define FF_EFFECTS_MAX	32
+#define IFORCE_EFFECTS_MAX	32
 
 /* Each force feedback effect is made of one core effect, which can be
  * associated to at most to effect modifiers
@@ -67,24 +64,11 @@
 #define FF_CORE_UPDATE		5	/* Effect is being updated */
 #define FF_MODCORE_MAX		5
 
-#define CHECK_OWNERSHIP(i, iforce)	\
-	((i) < FF_EFFECTS_MAX && i >= 0 && \
-	test_bit(FF_CORE_IS_USED, (iforce)->core_effects[(i)].flags) && \
-	(current->pid == 0 || \
-	(iforce)->core_effects[(i)].owner == current->pid))
-
 struct iforce_core_effect {
 	/* Information about where modifiers are stored in the device's memory */
 	struct resource mod1_chunk;
 	struct resource mod2_chunk;
 	unsigned long flags[NBITS(FF_MODCORE_MAX)];
-	pid_t owner;
-	/* Used to keep track of parameters of an effect. They are needed
-	 * to know what parts of an effect changed in an update operation.
-	 * We try to send only parameter packets if possible, as sending
-	 * effect parameter requires the effect to be stoped and restarted
-	 */
-	struct ff_effect effect;
 };
 
 #define FF_CMD_EFFECT		0x010e
@@ -145,7 +129,7 @@ struct iforce {
 					/* Force Feedback */
 	wait_queue_head_t wait;
 	struct resource device_memory;
-	struct iforce_core_effect core_effects[FF_EFFECTS_MAX];
+	struct iforce_core_effect core_effects[IFORCE_EFFECTS_MAX];
 	struct mutex mem_mutex;
 };
 
@@ -182,9 +166,9 @@ void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data) ;
 int iforce_get_id_packet(struct iforce *iforce, char *packet);
 
 /* iforce-ff.c */
-int iforce_upload_periodic(struct iforce*, struct ff_effect*, int is_update);
-int iforce_upload_constant(struct iforce*, struct ff_effect*, int is_update);
-int iforce_upload_condition(struct iforce*, struct ff_effect*, int is_update);
+int iforce_upload_periodic(struct iforce *, struct ff_effect *, struct ff_effect *);
+int iforce_upload_constant(struct iforce *, struct ff_effect *, struct ff_effect *);
+int iforce_upload_condition(struct iforce *, struct ff_effect *, struct ff_effect *);
 
 /* Public variables */
 extern struct serio_driver iforce_serio_drv;