[PATCH] drivers/input/joystick: convert to dynamic input_dev allocation

Input: convert drivers/input/joystick to dynamic input_dev allocation

This is required for input_dev sysfs integration

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 87 insertions, 62 deletions

diff --git a/drivers/input/joystick/grip_mp.c b/drivers/input/joystick/grip_mp.c
index da17eee6f574..a0ba93ccac72 100644
--- a/drivers/input/joystick/grip_mp.c
+++ b/drivers/input/joystick/grip_mp.c
@@ -32,23 +32,37 @@ MODULE_LICENSE("GPL");
 #define dbg(format, arg...) do {} while (0)
 #endif
 
+#define GRIP_MAX_PORTS	4
 /*
  * Grip multiport state
  */
 
+struct grip_port {
+	struct input_dev *dev;
+	int mode;
+	int registered;
+
+	/* individual gamepad states */
+	int buttons;
+	int xaxes;
+	int yaxes;
+	int dirty;     /* has the state been updated? */
+};
+
 struct grip_mp {
 	struct gameport *gameport;
-	struct input_dev dev[4];
-	int mode[4];
-	int registered[4];
+	struct grip_port *port[GRIP_MAX_PORTS];
+//	struct input_dev *dev[4];
+//	int mode[4];
+//	int registered[4];
 	int reads;
 	int bads;
 
 	/* individual gamepad states */
-	int buttons[4];
-	int xaxes[4];
-	int yaxes[4];
-	int dirty[4];     /* has the state been updated? */
+//	int buttons[4];
+//	int xaxes[4];
+//	int yaxes[4];
+//	int dirty[4];     /* has the state been updated? */
 };
 
 /*
@@ -85,16 +99,16 @@ struct grip_mp {
 #define GRIP_MODE_GP		2
 #define GRIP_MODE_C64		3
 
-static int grip_btn_gp[]  = { BTN_TR, BTN_TL, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, -1 };
-static int grip_btn_c64[] = { BTN_JOYSTICK, -1 };
+static const int grip_btn_gp[]  = { BTN_TR, BTN_TL, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, -1 };
+static const int grip_btn_c64[] = { BTN_JOYSTICK, -1 };
 
-static int grip_abs_gp[]  = { ABS_X, ABS_Y, -1 };
-static int grip_abs_c64[] = { ABS_X, ABS_Y, -1 };
+static const int grip_abs_gp[]  = { ABS_X, ABS_Y, -1 };
+static const int grip_abs_c64[] = { ABS_X, ABS_Y, -1 };
 
-static int *grip_abs[] = { NULL, NULL, grip_abs_gp, grip_abs_c64 };
-static int *grip_btn[] = { NULL, NULL, grip_btn_gp, grip_btn_c64 };
+static const int *grip_abs[] = { NULL, NULL, grip_abs_gp, grip_abs_c64 };
+static const int *grip_btn[] = { NULL, NULL, grip_btn_gp, grip_btn_c64 };
 
-static char *grip_name[] = { NULL, NULL, "Gravis Grip Pad", "Commodore 64 Joystick" };
+static const char *grip_name[] = { NULL, NULL, "Gravis Grip Pad", "Commodore 64 Joystick" };
 
 static const int init_seq[] = {
 	1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1,
@@ -104,9 +118,9 @@ static const int init_seq[] = {
 
 /* Maps multiport directional values to X,Y axis values (each axis encoded in 3 bits) */
 
-static int axis_map[] = { 5, 9, 1, 5, 6, 10, 2, 6, 4, 8, 0, 4, 5, 9, 1, 5 };
+static const int axis_map[] = { 5, 9, 1, 5, 6, 10, 2, 6, 4, 8, 0, 4, 5, 9, 1, 5 };
 
-static void register_slot(int i, struct grip_mp *grip);
+static int register_slot(int i, struct grip_mp *grip);
 
 /*
  * Returns whether an odd or even number of bits are on in pkt.
@@ -353,9 +367,10 @@ static int dig_mode_start(struct gameport *gameport, u32 *packet)
 
 static int get_and_decode_packet(struct grip_mp *grip, int flags)
 {
+	struct grip_port *port;
 	u32 packet;
 	int joytype = 0;
-	int slot = 0;
+	int slot;
 
 	/* Get a packet and check for validity */
 
@@ -377,6 +392,8 @@ static int get_and_decode_packet(struct grip_mp *grip, int flags)
 	if ((slot < 0) || (slot > 3))
 		return flags;
 
+	port = grip->port[slot];
+
 	/*
 	 * Handle "reset" packets, which occur at startup, and when gamepads
 	 * are removed or plugged in.  May contain configuration of a new gamepad.
@@ -385,14 +402,14 @@ static int get_and_decode_packet(struct grip_mp *grip, int flags)
 	joytype = (packet >> 16) & 0x1f;
 	if (!joytype) {
 
-		if (grip->registered[slot]) {
+		if (port->registered) {
 			printk(KERN_INFO "grip_mp: removing %s, slot %d\n",
-			       grip_name[grip->mode[slot]], slot);
-			input_unregister_device(grip->dev + slot);
-			grip->registered[slot] = 0;
+			       grip_name[port->mode], slot);
+			input_unregister_device(port->dev);
+			port->registered = 0;
 		}
 		dbg("Reset: grip multiport slot %d\n", slot);
-		grip->mode[slot] = GRIP_MODE_RESET;
+		port->mode = GRIP_MODE_RESET;
 		flags |= IO_SLOT_CHANGE;
 		return flags;
 	}
@@ -402,17 +419,17 @@ static int get_and_decode_packet(struct grip_mp *grip, int flags)
 	if (joytype == 0x1f) {
 
 		int dir = (packet >> 8) & 0xf;          /* eight way directional value */
-		grip->buttons[slot] = (~packet) & 0xff;
-		grip->yaxes[slot] = ((axis_map[dir] >> 2) & 3) - 1;
-		grip->xaxes[slot] = (axis_map[dir] & 3) - 1;
-		grip->dirty[slot] = 1;
+		port->buttons = (~packet) & 0xff;
+		port->yaxes = ((axis_map[dir] >> 2) & 3) - 1;
+		port->xaxes = (axis_map[dir] & 3) - 1;
+		port->dirty = 1;
 
-		if (grip->mode[slot] == GRIP_MODE_RESET)
+		if (port->mode == GRIP_MODE_RESET)
 			flags |= IO_SLOT_CHANGE;
 
-		grip->mode[slot] = GRIP_MODE_GP;
+		port->mode = GRIP_MODE_GP;
 
-		if (!grip->registered[slot]) {
+		if (!port->registered) {
 			dbg("New Grip pad in multiport slot %d.\n", slot);
 			register_slot(slot, grip);
 		}
@@ -445,9 +462,9 @@ static int slots_valid(struct grip_mp *grip)
 		return 0;
 
 	for (slot = 0; slot < 4; slot++) {
-		if (grip->mode[slot] == GRIP_MODE_RESET)
+		if (grip->port[slot]->mode == GRIP_MODE_RESET)
 			invalid = 1;
-		if (grip->mode[slot] != GRIP_MODE_NONE)
+		if (grip->port[slot]->mode != GRIP_MODE_NONE)
 			active = 1;
 	}
 
@@ -484,7 +501,7 @@ static int multiport_init(struct grip_mp *grip)
 
 	/* Get packets, store multiport state, and check state's validity */
 	for (tries = 0; tries < 4096; tries++) {
-		if ( slots_valid(grip) ) {
+		if (slots_valid(grip)) {
 			initialized = 1;
 			break;
 		}
@@ -499,24 +516,24 @@ static int multiport_init(struct grip_mp *grip)
 
 static void report_slot(struct grip_mp *grip, int slot)
 {
-	struct input_dev *dev = &(grip->dev[slot]);
-	int i, buttons = grip->buttons[slot];
+	struct grip_port *port = grip->port[slot];
+	int i;
 
 	/* Store button states with linux input driver */
 
 	for (i = 0; i < 8; i++)
-		input_report_key(dev, grip_btn_gp[i], (buttons >> i) & 1);
+		input_report_key(port->dev, grip_btn_gp[i], (port->buttons >> i) & 1);
 
 	/* Store axis states with linux driver */
 
-	input_report_abs(dev, ABS_X, grip->xaxes[slot]);
-	input_report_abs(dev, ABS_Y, grip->yaxes[slot]);
+	input_report_abs(port->dev, ABS_X, port->xaxes);
+	input_report_abs(port->dev, ABS_Y, port->yaxes);
 
 	/* Tell the receiver of the events to process them */
 
-	input_sync(dev);
+	input_sync(port->dev);
 
-	grip->dirty[slot] = 0;
+	port->dirty = 0;
 }
 
 /*
@@ -540,7 +557,7 @@ static void grip_poll(struct gameport *gameport)
 	}
 
 	for (i = 0; i < 4; i++)
-		if (grip->dirty[i])
+		if (grip->port[i]->dirty)
 			report_slot(grip, i);
 }
 
@@ -571,35 +588,43 @@ static void grip_close(struct input_dev *dev)
  * Tell the linux input layer about a newly plugged-in gamepad.
  */
 
-static void register_slot(int slot, struct grip_mp *grip)
+static int register_slot(int slot, struct grip_mp *grip)
 {
+	struct grip_port *port = grip->port[slot];
+	struct input_dev *input_dev;
 	int j, t;
 
-	grip->dev[slot].private = grip;
-	grip->dev[slot].open = grip_open;
-	grip->dev[slot].close = grip_close;
-	grip->dev[slot].name = grip_name[grip->mode[slot]];
-	grip->dev[slot].id.bustype = BUS_GAMEPORT;
-	grip->dev[slot].id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
-	grip->dev[slot].id.product = 0x0100 + grip->mode[slot];
-	grip->dev[slot].id.version = 0x0100;
-	grip->dev[slot].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+	port->dev = input_dev = input_allocate_device();
+	if (!input_dev)
+		return -ENOMEM;
+
+	input_dev->name = grip_name[port->mode];
+	input_dev->id.bustype = BUS_GAMEPORT;
+	input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
+	input_dev->id.product = 0x0100 + port->mode;
+	input_dev->id.version = 0x0100;
+	input_dev->cdev.dev = &grip->gameport->dev;
+	input_dev->private = grip;
+
+	input_dev->open = grip_open;
+	input_dev->close = grip_close;
 
-	for (j = 0; (t = grip_abs[grip->mode[slot]][j]) >= 0; j++)
-		input_set_abs_params(&grip->dev[slot], t, -1, 1, 0, 0);
+	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 
-	for (j = 0; (t = grip_btn[grip->mode[slot]][j]) >= 0; j++)
+	for (j = 0; (t = grip_abs[port->mode][j]) >= 0; j++)
+		input_set_abs_params(input_dev, t, -1, 1, 0, 0);
+
+	for (j = 0; (t = grip_btn[port->mode][j]) >= 0; j++)
 		if (t > 0)
-			set_bit(t, grip->dev[slot].keybit);
+			set_bit(t, input_dev->keybit);
 
-	input_register_device(grip->dev + slot);
-	grip->registered[slot] = 1;
+	input_register_device(port->dev);
+	port->registered = 1;
 
-	if (grip->dirty[slot])	            /* report initial state, if any */
+	if (port->dirty)	            /* report initial state, if any */
 		report_slot(grip, slot);
 
-	printk(KERN_INFO "grip_mp: added %s, slot %d\n",
-	       grip_name[grip->mode[slot]], slot);
+	return 0;
 }
 
 static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
@@ -626,7 +651,7 @@ static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
 		goto fail2;
 	}
 
-	if (!grip->mode[0] && !grip->mode[1] && !grip->mode[2] && !grip->mode[3]) {
+	if (!grip->port[0]->mode && !grip->port[1]->mode && !grip->port[2]->mode && !grip->port[3]->mode) {
 		/* nothing plugged in */
 		err = -ENODEV;
 		goto fail2;
@@ -646,8 +671,8 @@ static void grip_disconnect(struct gameport *gameport)
 	int i;
 
 	for (i = 0; i < 4; i++)
-		if (grip->registered[i])
-			input_unregister_device(grip->dev + i);
+		if (grip->port[i]->registered)
+			input_unregister_device(grip->port[i]->dev);
 	gameport_close(gameport);
 	gameport_set_drvdata(gameport, NULL);
 	kfree(grip);